This module should do four things at once:

1. Educate the patient in plain language

2. Support the surgeon and care team with structured workflow logic

3. Map devices, supplies, and pharma to each phase of the case

4. Create a reusable LDS digital product for web, app, LMS, and sales enablement.

A. Module title

Total Knee: A Guided Digital Surgical Experience

B. Module audience

• Patients and families

• Surgeons

• OR staff

• Hospitals

• Device reps

• Pharma partners

• Educators and training programs

Patient-Facing Version

Total Knee Replacement (Total Knee Arthroplasty – TKA)

What Is a Total Knee Replacement?

A Total Knee Replacement (TKA) is a surgical procedure used to replace a damaged or worn-out knee joint with artificial components called implants or prostheses.

The knee is one of the body’s largest and hardest-working joints. It helps you walk, bend, climb stairs, stand, and maintain balance. When the joint becomes damaged from arthritis, injury, or wear over time, movement can become painful and difficult.

A Total Knee Replacement removes damaged joint surfaces and replaces them with smooth artificial materials designed to:

• Reduce pain

• Restore movement

• Improve stability

• Help patients return to daily activities

• Improve overall quality of life

⸻

Why Is Knee Replacement Done?

Total Knee Replacement is usually performed when knee pain and stiffness interfere with daily life and non-surgical treatments are no longer effective.

Common reasons include:

Osteoarthritis

The most common reason.

The protective cartilage in the knee wears away over time, causing:

• Bone-on-bone contact

• Pain

• Swelling

• Stiffness

• Limited mobility

Rheumatoid Arthritis

An autoimmune disease that causes inflammation and damage inside the knee joint.

Post-Traumatic Arthritis

Arthritis that develops after:

• Fractures

• Ligament injuries

• Meniscus damage

• Previous knee trauma

Joint Deformity or Severe Instability

Some knees become:

• Bowed inward or outward

• Unstable

• Difficult to support body weight

⸻

When Might Surgery Be Recommended?

Your surgeon may discuss Total Knee Replacement if you experience:

• Chronic knee pain

• Pain while walking or climbing stairs

• Pain at rest or during sleep

• Swelling that does not improve

• Knee stiffness

• Reduced mobility

• Difficulty performing normal activities

• Failure of non-surgical treatments

Non-surgical treatments often attempted first include:

• Physical therapy

• Weight management

• Anti-inflammatory medications

• Knee injections

• Bracing

• Activity modification

⸻

What Happens During Surgery?

During the procedure:

Step 1 — Anesthesia

You receive anesthesia so you are comfortable and pain-free.

This may include:

• General anesthesia

• Spinal anesthesia

• Regional nerve blocks

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Step 2 — Surgical Exposure

The surgeon makes an incision over the knee and carefully exposes the joint.

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Step 3 — Removal of Damaged Surfaces

Damaged cartilage and small amounts of bone are removed from:

• Femur (thigh bone)

• Tibia (shin bone)

• Sometimes the patella (kneecap)

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Step 4 — Implant Placement

Artificial implants are positioned to recreate a smooth functioning joint.

Typical components include:

Femoral Component
Usually metal and attached to the thigh bone.

Tibial Component
Metal base attached to the shin bone.

Polyethylene Insert
Smooth plastic spacer that allows motion.

Patellar Component (sometimes used)
Plastic surface replacing the kneecap underside.

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Step 5 — Alignment and Stability Check

The surgeon checks:

• Motion

• Implant fit

• Alignment

• Stability

• Soft tissue balance

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Step 6 — Closure

The incision is closed and recovery begins.

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Surgical Approaches

Several surgical techniques may be used.

Traditional Total Knee Replacement

The most common approach.

Provides broad exposure and precise implant positioning.

Minimally Invasive Knee Replacement

Uses a smaller incision and less tissue disruption.

Potential benefits may include:

• Less pain

• Faster early recovery

• Smaller scar

Not every patient is a candidate.

Robotic-Assisted Knee Replacement

Some surgeons use robotic systems to assist with:

• Pre-operative planning

• Bone preparation

• Implant alignment

• Precision balancing

Robotic assistance helps guide the surgeon but does not perform the surgery independently.

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Benefits of Surgery

Potential benefits include:

• Pain relief

• Improved walking

• Better range of motion

• Increased independence

• Improved sleep

• Return to activities

Many patients report significant improvement in quality of life.

⸻

Risks of Surgery

Every surgery carries risk.

Possible complications include:

• Infection

• Blood clots

• Bleeding

• Implant loosening

• Stiffness

• Nerve or vessel injury

• Persistent pain

• Need for revision surgery

Your surgical team works to minimize these risks.

⸻

Recovery Overview

Most patients:

• Stand or walk within 24 hours

• Begin physical therapy quickly

• Go home the same day or within several days

• Improve steadily over weeks and months

Typical recovery:

Recovery Milestone

Timeline

Walking with assistance

Same day–1 day

Home recovery

1–2 weeks

Increased mobility

4–6 weeks

Return to many activities

6–12 weeks

Full recovery

3–12 months

Recovery varies by patient.

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LDS Patient Message

Communication is the lifeline of care.

At Let’s Do Surgery, we help patients understand:

• Why surgery may be needed

• Which knee replacement options exist

• What technology may be used

• What recovery looks like

• How to make informed decisions with their surgical team

We Don’t Just Inform — We Connect.

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Professional-Facing Version

Total Knee Arthroplasty (TKA) — Clinical Procedure Overview

Definition

Total Knee Arthroplasty (TKA) is a reconstructive orthopedic procedure involving:

• Resection of diseased articular surfaces

• Restoration of mechanical alignment

• Ligament balancing

• Implantation of prosthetic femoral, tibial, and sometimes patellar components

Goal:

• Pain relief

• Functional restoration

• Correction of deformity

• Durable biomechanical reconstruction

⸻

Primary Indications

Degenerative Joint Disease

Most common indication.

Including:

• End-stage osteoarthritis

• Tricompartment disease

• Bone-on-bone degeneration

Inflammatory Arthropathy

Examples:

• Rheumatoid arthritis

• Psoriatic arthritis

• Chronic synovitis

Post-Traumatic Arthritis

Secondary to:

• Fracture

• Ligament instability

• Meniscal loss

• Prior surgery

Severe Deformity / Instability

Including:

• Varus deformity

• Valgus deformity

• Flexion contracture

• Multiplanar instability

⸻

Procedure Objectives

TKA seeks to achieve:

Mechanical Restoration

• Neutral limb alignment

• Joint line restoration

• Proper component orientation

Soft Tissue Balance

Balanced:

• Medial compartment

• Lateral compartment

• Flexion/extension gaps

Stable Kinematics

Goals include:

• Functional ROM

• Patellofemoral tracking

• Stability throughout motion

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Implant Construct

Typical construct:

Femoral Component

Usually:

• Cobalt-chrome

• Oxinium

• Cemented or cementless

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Tibial Baseplate

Options:

• Metal tray

• Cemented/cementless fixation

• Stem augmentation if indicated

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Polyethylene Insert

Designs:

• Fixed-bearing

• Mobile-bearing

• Highly cross-linked polyethylene

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Patellar Component

May be:

• Resurfaced

• Retained

• Selectively resurfaced

Based on:

• Surgeon preference

• Cartilage status

• Patient factors

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Surgical Approaches

Common exposures:

Medial Parapatellar

Most widely utilized.

Advantages:

• Excellent visualization

• Familiar anatomy

• Broad applicability

⸻

Midvastus / Subvastus

Muscle-sparing options.

Potential advantages:

• Earlier quadriceps recovery

• Reduced tissue disruption

Patient selection dependent.

⸻

Alignment Philosophy

Contemporary strategies include:

Mechanical Alignment

Traditional standard.

Goal:

• Neutral hip-knee-ankle axis

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Kinematic Alignment

Attempts to restore:

• Native anatomy

• Constitutional alignment

• Physiologic ligament tension

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Restricted Kinematic / Hybrid Strategies

Increasingly utilized.

Balance between:

• Implant survivorship

• Personalized alignment

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Technology Integration

Modern TKA increasingly incorporates:

Computer Navigation

Enhances:

• Alignment accuracy

• Intraoperative measurements

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Robotic-Assisted TKA

Examples may include:

• Image-based systems

• Imageless systems

Benefits:

• Precision bone preparation

• Gap balancing

• Implant positioning

• Reproducibility

⸻

Patient-Specific Instrumentation (PSI)

Uses:

• CT/MRI-based planning

• Customized cutting guides

Variable adoption.

⸻

Perioperative Pathway

Enhanced recovery pathways often include:

Preoperative Optimization

• Glycemic control

• Smoking cessation

• Weight management

• Medical clearance

• Infection risk mitigation

Multimodal Analgesia

Common components:

• Peripheral nerve block

• Periarticular injection

• NSAIDs

• Acetaminophen

• Limited opioid strategies

Early Mobilization

Goal:

• Same-day ambulation

• Accelerated rehabilitation

• Reduced LOS

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Outcome Expectations

Successful TKA commonly produces:

• Significant pain reduction

• Improved ROM

• Functional restoration

• High patient satisfaction

• Long-term survivorship

Modern implants often demonstrate:

• 15–25+ year survivorship

• High functional durability

• Reduced revision rates with optimized technique and selection

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LDS Professional Intelligence Positioning

The LDS Total Knee Module serves as a:

Decision Layer

Understanding:

• Disease severity

• Surgical candidacy

• Implant and alignment strategy

Direction Layer

Matching:

• Surgeon expertise

• Technology availability

• Facility capabilities

Connection Layer

Connecting:

• Patients

• Surgeons

• Implant systems

• Pharmaceutical and device support

• Professional intelligence

Communication as the lifeline of care.
We Don’t Just Inform — We Connect.

Total Knee Digital Module, Section 2: Anatomy module

Total Knee Digital Module

Section 2: Anatomy Module

Patient-Facing Version

What part of the body are we talking about?

A total knee replacement focuses on the knee joint, where the thigh bone, shin bone, and kneecap meet.

The knee works like a strong hinge that allows you to:

Walk

Stand

Climb stairs

Bend and straighten the leg

Support body weight

⸻

Main Knee Anatomy

1. Femur — Thigh Bone

The femur is the large bone of the upper leg.

The bottom end of the femur forms the top part of the knee joint.

In knee arthritis, the smooth surface at the end of the femur wears down.

During total knee replacement, the damaged end of the femur is reshaped and covered with a metal implant.

⸻

2. Tibia — Shin Bone

The tibia is the main bone of the lower leg.

It forms the bottom platform of the knee joint.

In surgery, the damaged top surface of the tibia is removed and replaced with a metal baseplate and plastic spacer.

⸻

3. Patella — Kneecap

The patella is the small bone in front of the knee.

It helps the thigh muscles straighten the leg.

Sometimes the back surface of the kneecap is resurfaced with a plastic button during knee replacement.

⸻

4. Cartilage — The Smooth Cushion

Cartilage is the smooth covering on the ends of the bones.

Healthy cartilage lets the knee glide smoothly.

In arthritis, cartilage wears away, causing:

Pain

Stiffness

Swelling

Bone-on-bone rubbing

Loss of motion

⸻

5. Meniscus — Shock Absorber

The knee has two menisci:

Medial meniscus — inside of the knee

Lateral meniscus — outside of the knee

They act like cushions between the femur and tibia.

In total knee replacement, these damaged cushioning structures are removed as part of joint resurfacing.

⸻

6. Ligaments — Knee Stabilizers

Ligaments are strong bands that hold the knee together.

Important knee ligaments include:

ACL — anterior cruciate ligament

PCL — posterior cruciate ligament

MCL — medial collateral ligament

LCL — lateral collateral ligament

In many total knee replacements, the ACL is removed.

The PCL may be kept or removed depending on implant design.

⸻

7. Muscles and Tendons

The main muscle group involved is the quadriceps, located in the front of the thigh.

The quadriceps connects to the patella and helps straighten the knee.

Other important structures include:

Quadriceps tendon

Patellar tendon

Hamstrings

Calf muscles

These muscles are important for walking, balance, and recovery after surgery.

⸻

Simple Patient Explanation

A total knee replacement does not replace the entire leg.

It replaces the damaged joint surfaces of the knee.

The surgeon removes worn-out cartilage and damaged bone from the:

Femur

Tibia

Sometimes patella

Then the knee is rebuilt using:

Metal components

Plastic spacer

Sometimes a plastic kneecap button

The goal is to create a smoother, more stable, less painful knee joint.

⸻

Professional-Facing Version

Core Anatomy for Total Knee Arthroplasty

Total knee arthroplasty addresses degenerative or damaged articular surfaces of the tibiofemoral and often patellofemoral compartments.

Key structures include:

Distal femur

Proximal tibia

Patella

Articular cartilage

Menisci

Collateral ligaments

Cruciate ligaments

Extensor mechanism

Neurovascular structures

⸻

Bony Anatomy

Distal Femur

Relevant landmarks:

Medial femoral condyle

Lateral femoral condyle

Intercondylar notch

Epicondyles

Posterior condyles

Trochlear groove

Femoral preparation must account for:

Mechanical axis

Femoral rotation

Posterior condylar axis

Epicondylar axis

Flexion-extension gap balance

⸻

Proximal Tibia

Relevant landmarks:

Medial tibial plateau

Lateral tibial plateau

Tibial spine region

Tibial tubercle

Posterior slope

Medial and lateral cortical boundaries

Tibial preparation focuses on:

Varus-valgus alignment

Posterior slope

Rotational alignment

Coverage without overhang

Balanced tibiofemoral contact

⸻

Patella

Important considerations:

Patellar thickness

Articular wear pattern

Tracking

Component positioning

Extensor mechanism tension

Patellar resurfacing depends on surgeon preference, implant system, cartilage status, and tracking.

⸻

Soft Tissue Anatomy

Ligaments

Key stabilizers:

MCL — primary medial restraint

LCL — lateral restraint

ACL — commonly sacrificed in TKA

PCL — retained or sacrificed depending on implant type

Implant choices may include:

Cruciate-retaining

Posterior-stabilized

Medial-stabilized

Constrained condylar

Hinged designs

⸻

Menisci

The medial and lateral menisci are removed during total knee arthroplasty as part of joint preparation.

Their load-sharing role is replaced by the polyethylene insert.

⸻

Extensor Mechanism

Includes:

Quadriceps muscle

Quadriceps tendon

Patella

Patellar tendon

Tibial tubercle

Protection of the extensor mechanism is critical for:

Postoperative function

Straight-leg raise

Stair climbing

Gait recovery

Patellar tracking

⸻

Neurovascular Anatomy

Important posterior structures include:

Popliteal artery

Popliteal vein

Tibial nerve

Common peroneal nerve laterally

Clinical relevance:

Posterior capsular work requires caution

Severe deformity increases neurovascular risk

Valgus knees require attention to peroneal nerve tension

Retractor placement is critical

⸻

Anatomy-Based Surgical Goals

The anatomy module should teach that total knee replacement is a surface replacement and alignment procedure.

The surgical goals are to:

Restore mechanical alignment

Balance flexion and extension gaps

Recreate stable knee motion

Maintain patellar tracking

Protect collateral ligaments

Preserve or substitute ligament function

Reduce painful bone-on-bone contact

⸻

LDS Visual Module Ideas

Interactive 3D Anatomy Map

Clickable structures:

Femur

Tibia

Patella

Cartilage

Meniscus

ACL/PCL

MCL/LCL

Quadriceps tendon

Patellar tendon

Patient Toggle

“Normal Knee” → “Arthritic Knee” → “Implanted Knee”

Professional Toggle

“Bone Cuts” → “Ligament Balance” → “Implant Position” → “Patellar Tracking”

Animation Sequence

1. Healthy knee joint

2. Cartilage wear begins

3. Bone-on-bone arthritis develops

4. Pain and deformity increase

5. Damaged surfaces are removed

6. Femoral and tibial implants are placed

7. Plastic spacer restores smooth motion

• 8. Knee bends and straightens with improved alignment

Total Knee Digital Module, Section 3: Disease states

Total Knee Digital Module

Section 3: Disease States

LDS Format — Patient Intelligence + Professional Intelligence Layer

Procedure Focus: Total Knee Arthroplasty (TKA / Total Knee Replacement)

⸻

SECTION 3 — DISEASE STATES

⸻

Patient-Facing Version

What Conditions Lead to Total Knee Replacement?

A Total Knee Replacement (TKA) is performed when the knee joint becomes damaged, painful, unstable, or worn down to the point that everyday activities become difficult and non-surgical treatments no longer provide relief.

The most common disease states include:

⸻

1. Osteoarthritis (OA)

“Wear-and-Tear Arthritis”

What is it?

Osteoarthritis is the most common reason for knee replacement.

It occurs when the cartilage cushioning the knee joint gradually wears away, allowing bone surfaces to rub against one another.

What happens in the knee?

Healthy knee:

• Smooth cartilage

• Easy motion

• Minimal friction

Arthritic knee:

• Cartilage loss

• Bone-on-bone contact

• Bone spur formation

• Inflammation

• Reduced motion

⸻

Common Symptoms

• Knee pain

• Stiffness

• Swelling

• Grinding or clicking

• Difficulty climbing stairs

• Trouble walking

• Night pain

• Limited motion

⸻

Risk Factors

• Aging

• Prior injury

• Obesity

• Genetics

• Repetitive stress

• Alignment problems

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LDS Visual Layer

3D Animation:

Healthy knee → cartilage wear → bone-on-bone arthritis → knee replacement solution

⸻

2. Rheumatoid Arthritis (RA)

“Inflammatory Arthritis”

What is it?

Rheumatoid arthritis is an autoimmune disease.

The body’s immune system attacks the joint lining (synovium) causing inflammation and joint destruction.

⸻

What Happens?

Inflammation causes:

• Synovial thickening

• Cartilage damage

• Bone erosion

• Joint instability

• Deformity

⸻

Symptoms

Often affects both knees.

Common findings:

• Swelling

• Warmth

• Morning stiffness

• Fatigue

• Progressive pain

• Reduced mobility

⸻

Why Surgery May Be Needed

When medications and biologic therapies fail to prevent joint destruction, TKA may restore:

• Mobility

• Alignment

• Pain relief

• Function

⸻

LDS Visual Layer

Immune attack animation:

Normal synovium → inflammation → cartilage erosion → deformity

⸻

3. Post-Traumatic Arthritis

“Arthritis After Injury”

What is it?

This arthritis develops after a knee injury.

Examples:

• Fractures

• Ligament tears

• Meniscus injury

• Sports trauma

• Work injury

Even after healing, the joint may become arthritic years later.

⸻

Why Does It Happen?

Injury may cause:

• Cartilage damage

• Joint instability

• Abnormal mechanics

• Malalignment

Over time:

• Accelerated wear

• Chronic inflammation

• Arthritis progression

⸻

Symptoms

• Chronic pain

• Swelling

• Instability

• Limited motion

• Mechanical symptoms

⸻

LDS Visual Layer

Trauma timeline:

Injury → healing → altered mechanics → arthritis → replacement

⸻

4. Knee Deformity

“Alignment Problems”

Some patients develop severe deformity causing uneven pressure and progressive joint destruction.

Two common patterns:

⸻

Varus Knee

“Bow-Legged”

The knee angles outward.

Pressure concentrates on the:

• Inner (medial) compartment

This is the most common arthritis pattern.

Symptoms:

• Medial knee pain

• Progressive bowing

• Uneven walking

⸻

Valgus Knee

“Knock-Kneed”

The knee angles inward.

Pressure shifts to:

• Outer (lateral) compartment

Symptoms:

• Lateral pain

• Instability

• Difficulty walking

⸻

Why Replacement Helps

TKA restores:

• Alignment

• Joint balance

• Weight distribution

• Function

⸻

LDS Visual Layer

Interactive alignment comparison:

Normal vs Varus vs Valgus

⸻

5. Osteonecrosis (Avascular Necrosis)

“Bone Death from Loss of Blood Supply”

What is it?

Blood flow to part of the bone decreases or stops.

Without circulation:

• Bone weakens

• Bone collapses

• Joint surface deteriorates

Often affects:

• Femoral condyle

• Tibial plateau

⸻

Risk Factors

• Steroid use

• Alcohol abuse

• Trauma

• Blood disorders

• Sometimes unknown causes

⸻

Symptoms

• Sudden pain

• Progressive collapse

• Swelling

• Loss of function

⸻

When TKA is Needed

If collapse becomes severe and joint preservation fails.

⸻

LDS Visual Layer

Bone blood supply animation:

Normal perfusion → ischemia → collapse

⸻

6. Failed Previous Knee Surgery

“Revision or Salvage Arthritis”

Prior surgery may eventually fail.

Examples:

• Failed cartilage procedures

• Failed ligament reconstruction

• Failed osteotomy

• Partial knee failure

• Hardware complications

These may lead to:

• Progressive arthritis

• Instability

• Pain

• Mechanical failure

⸻

Why TKA is Considered

Replacement may become the best reconstructive option.

⸻

LDS Visual Layer

Timeline:

Prior surgery → degeneration → reconstruction → TKA

⸻

7. Severe Cartilage Loss

“End-Stage Knee Degeneration”

Sometimes disease is less important than overall joint damage.

End-stage degeneration means:

• Near complete cartilage loss

• Bone-on-bone contact

• Major pain

• Functional disability

Patients often report:

• Pain with every step

• Reduced walking tolerance

• Difficulty standing

• Loss of independence

⸻

LDS Decision Point

TKA is typically considered when:

✔ Pain affects quality of life

✔ Walking and activity decline

✔ Conservative treatments fail

✔ Imaging confirms advanced disease

⸻

Professional-Facing Version

Disease State Intelligence Layer

⸻

Primary TKA Indications

Major etiologies:

Degenerative

• Primary OA

• Secondary OA

• Post-meniscectomy OA

Inflammatory

• RA

• Psoriatic arthritis

• Seronegative arthropathy

Post-Traumatic

• Intra-articular fracture

• Ligament instability

• Malunion

• Chronic overload

Structural

• Varus deformity

• Valgus deformity

• Flexion contracture

Metabolic / Vascular

• Osteonecrosis

• Crystal arthropathy

Revision Pathology

• Failed osteotomy

• Failed unicompartmental arthroplasty

• Hardware-associated degeneration

⸻

Radiographic Disease Patterns

Common findings:

OA

• Joint-space narrowing

• Osteophytes

• Subchondral sclerosis

• Cysts

• Varus predominance

RA

• Symmetric narrowing

• Erosions

• Osteopenia

• Synovitis

Post-Traumatic

• Irregular joint surface

• Hardware

• Malalignment

• Focal degeneration

⸻

Disease Severity Assessment

Common scoring systems:

Clinical

• WOMAC

• KOOS

• Oxford Knee Score

• VAS Pain

• SF-36

Radiographic

• Kellgren–Lawrence

• Ahlbäck

• Mechanical axis evaluation

⸻

Professional Decision Layer

Disease state directly influences:

• Implant selection

• Constraint level

• Soft tissue balancing

• Bone defect strategy

• Fixation method

• Revision preparedness

• Robotics/navigation use

• Long-term survivorship planning

⸻

LDS Connection Layer

Disease → Decision → Direction → Connection

Disease state should guide:

Decision

• Is surgery needed?

• Joint preservation vs TKA?

Direction

• Standard vs complex surgeon

• Robotic vs conventional

• Outpatient vs inpatient

Connection

• Match patient with appropriate surgeon expertise and technology stack.

⸻

Section 3 LDS Output Summary

Patient Layer:

“What disease is damaging my knee and why do I need surgery?”

Professional Layer:

“How does disease pathology alter TKA planning, implants, alignment strategy, and outcomes?”

Total Knee Digital Module, Section 4: Pre-op workup

Total Knee Digital Module

Section 4: Pre-op Workup

Patient-facing version

Before a total knee replacement, your care team checks that surgery is the right choice, that your knee problem matches your symptoms, and that your body is ready for a safe operation and recovery.

1. Confirming the knee problem

Most patients have knee replacement because of severe knee arthritis. Your surgeon will review:

Your symptoms

• Pain with walking, stairs, standing, or getting out of a chair

• Stiffness or loss of motion

• Swelling

• Bow-legged or knock-kneed deformity

• Pain that continues despite medicine, injections, therapy, or activity changes

Your imaging

• Standing knee X-rays

• Alignment views if needed

• Sometimes MRI or CT if the diagnosis is unclear or custom/robotic planning is needed

2. Medical clearance

Your team checks whether your heart, lungs, kidneys, blood sugar, blood counts, and medications are safe for surgery.

Common pre-op tests may include:

• Blood work

• EKG

• Chest X-ray if medically indicated

• Urine testing if symptoms suggest infection

• Primary care clearance

• Cardiology clearance if you have heart disease

• Dental or infection evaluation if there is concern for active infection

3. Medication review

Your team will review medications such as:

• Blood thinners

• Aspirin or anti-inflammatory drugs

• Diabetes medicines

• Blood pressure medicines

• Steroids or immune-suppressing drugs

• Opioid pain medications

• Supplements that may increase bleeding risk

Some medications may need to be stopped or adjusted before surgery.

4. Infection prevention

Because an artificial knee implant is placed inside the body, preventing infection is a major focus.

Pre-op infection steps may include:

• Skin cleansing instructions

• Nasal screening for bacteria such as MRSA/MSSA

• Antibiotics before surgery

• Checking for open wounds, dental infection, urinary infection symptoms, or skin infection

• Optimizing diabetes and nutrition

5. Physical preparation

The stronger and more flexible you are before surgery, the easier recovery may be.

Pre-op preparation may include:

• “Prehab” physical therapy

• Quadriceps strengthening

• Range-of-motion exercises

• Weight management if needed

• Smoking cessation

• Home safety planning

• Walker/cane training

• Planning transportation and help at home

6. Surgical planning

Your surgeon decides the safest and best plan for your knee.

Planning includes:

• Implant type and size

• Cemented vs cementless fixation

• Robotic, computer-assisted, or conventional technique

• Correcting alignment

• Managing deformity or bone loss

• Deciding whether outpatient or inpatient surgery is safest

7. Patient decision checklist

Before surgery, the patient should understand:

• Why knee replacement is being recommended

• What non-surgical treatments have been tried

• What the implant does and does not do

• Expected recovery timeline

• Pain control plan

• Risks and complications

• Need for physical therapy

• When they can walk, drive, return to work, and resume activities

⸻

Professional-facing version

The pre-op workup for total knee arthroplasty is designed to confirm indication, optimize modifiable risk factors, reduce infection and thromboembolic risk, support implant planning, and prepare the patient for postoperative rehabilitation.

1. Indication confirmation

Evaluate:

• End-stage osteoarthritis, inflammatory arthritis, post-traumatic arthritis, avascular necrosis, or severe deformity

• Failure of conservative management

• Functional limitation affecting ADLs

• Pain pattern consistent with radiographic disease

• ROM limitation, flexion contracture, instability, varus/valgus deformity

• Prior procedures, injections, infections, trauma, or hardware

2. Imaging workup

Standard imaging may include:

• Weight-bearing AP knee X-ray

• Lateral knee X-ray

• Merchant/sunrise patellar view

• Long-leg alignment films when deformity or mechanical-axis planning is needed

• CT protocol for robotic/navigation/custom implant planning

• MRI only when diagnosis is uncertain or soft-tissue pathology changes management

Assess:

• Joint-space narrowing

• Osteophytes

• Subchondral sclerosis/cysts

• Bone loss

• Patellar tracking

• Varus/valgus alignment

• Flexion contracture

• Prior hardware

• Femoral/tibial bone quality

3. Medical optimization

Key optimization areas:

• Cardiac risk assessment

• Pulmonary risk assessment

• Diabetes control

• Renal function

• Anemia correction

• Nutritional status

• BMI/weight optimization

• Smoking cessation

• Sleep apnea screening

• History of DVT/PE

• Chronic opioid use

• Immunosuppression or inflammatory disease management

Common labs/tests:

• CBC

• CMP/BMP

• PT/INR/PTT if indicated

• HbA1c for diabetic or high-risk patients

• Type and screen depending on institution

• EKG based on age/risk

• Additional testing guided by comorbidities

4. Infection-risk reduction

Pre-op infection protocol may include:

• MRSA/MSSA nasal screening and decolonization

• Chlorhexidine skin cleansing

• Perioperative antibiotic plan

• Dental infection evaluation when clinically indicated

• Delay surgery for active skin wounds, cellulitis, systemic infection, or symptomatic UTI

• Glycemic optimization

• Nutrition/protein optimization

• Smoking cessation

• Avoidance of intra-articular steroid injection close to surgery per institutional policy

5. Medication management

Review and coordinate:

• Anticoagulants: warfarin, DOACs, heparins

• Antiplatelets: aspirin, clopidogrel

• NSAIDs

• Diabetes agents, including insulin and GLP-1 medications

• Steroids and biologics

• Rheumatologic medications

• Chronic opioids

• Supplements affecting bleeding

• Hormonal therapy if VTE risk is relevant

Medication decisions should be coordinated with anesthesia, primary care, cardiology, or prescribing specialists.

6. VTE risk planning

Assess:

• Prior DVT/PE

• Cancer history

• Thrombophilia

• Obesity

• Limited mobility

• Hormone therapy

• Smoking

• Bilateral procedures

• Revision or complex surgery

Plan:

• Mechanical prophylaxis

• Early mobilization

• Chemoprophylaxis selection

• Duration of prophylaxis

• Outpatient vs inpatient monitoring needs

7. Anesthesia and pain pathway

Pre-op anesthesia review includes:

• General vs spinal/regional anesthesia

• Peripheral nerve block plan

• Multimodal pain protocol

• Opioid-sparing strategy

• Nausea prevention

• Sleep apnea precautions

• Post-op monitoring needs

Common multimodal components may include acetaminophen, NSAID/COX-2 inhibitor when appropriate, regional blocks, periarticular injection, and limited opioid rescue.

8. Implant and technical planning

Surgeon planning includes:

• Implant system

• Cruciate-retaining vs posterior-stabilized vs medial-pivot/constrained design

• Cemented vs cementless fixation

• Patellar resurfacing decision

• Polyethylene thickness options

• Alignment philosophy: mechanical, kinematic, restricted kinematic, or functional alignment

• Robotic/navigation/manual instrumentation

• Management of varus/valgus deformity

• Ligament balancing strategy

• Bone defects and augments if needed

• Prior hardware removal strategy

• Tourniquet use

• Blood conservation plan

9. Discharge planning

Determine whether the patient is appropriate for same-day discharge, short-stay admission, or inpatient rehab.

Assess:

• Home support

• Stairs and home layout

• Baseline mobility

• Cognitive status

• Fall risk

• Transportation

• Access to outpatient or home PT

• Medical comorbidity burden

• Patient expectations and motivation

10. LDS pre-op intelligence checklist

Decision layer

• Is TKA truly indicated?

• Has conservative care failed?

• Does imaging match symptoms?

• Does the patient understand alternatives?

Direction layer

• Is the patient suited for outpatient or inpatient TKA?

• Does the surgeon/hospital have the needed technology?

• Is robotic or navigation planning useful?

• Are complex-case resources needed?

Connection layer

• Which implant/device pathway is being used?

• Are reps needed for implant system support?

• Are special trays, robotics, cementless components, augments, or constrained implants required?

• Is the patient connected to education, rehab, and follow-up resources?

Section 4 Output Summary

The pre-op workup is the safety and planning phase of total knee replacement. It confirms the diagnosis, prepares the patient medically, reduces infection and clot risk, supports implant selection, and creates the recovery plan before the patient enters the operating room.

Total Knee Digital Module, Section 5: Procedure approaches

Total Knee Digital Module

Section 5: Procedure Approaches

Patient-Facing Version

A total knee replacement can be performed using different surgical approaches and technologies. The goal is the same: remove damaged joint surfaces and replace them with artificial components that help reduce pain, improve alignment, and restore movement.

Main Procedure Approaches

1. Traditional Total Knee Replacement

This is the standard approach.

The surgeon makes an incision over the front of the knee, moves soft tissue aside, removes damaged cartilage and bone, and places metal and plastic implants.

Best for:
Most patients with advanced arthritis, deformity, stiffness, or severe pain.

Key points:
Reliable, widely used, predictable outcomes.

⸻

2. Minimally Invasive Total Knee Replacement

This uses a smaller incision and less soft-tissue disruption.

The goal is to reduce trauma to muscles and tendons while still placing the implant accurately.

Best for:
Selected patients with good bone structure, less severe deformity, and appropriate anatomy.

Key points:
May allow less pain early on, faster early recovery, but not right for everyone.

⸻

3. Robotic-Assisted Total Knee Replacement

A robotic system helps the surgeon plan and perform bone cuts with high precision.

The surgeon remains in control, but the robot assists with alignment, balancing, and implant positioning.

Best for:
Patients who may benefit from customized alignment, precise implant placement, or complex anatomy.

Key points:
Improves planning and accuracy. It does not replace the surgeon.

⸻

4. Computer-Navigated Total Knee Replacement

This uses sensors and imaging guidance to help the surgeon align the knee implant.

It works like GPS for the knee, helping guide bone cuts and implant position.

Best for:
Patients where alignment is especially important, including deformity or prior surgery.

Key points:
Helps improve accuracy without necessarily using a robotic arm.

⸻

5. Patient-Specific Instrumentation

Preoperative imaging is used to create custom cutting guides for the patient’s knee.

These guides help the surgeon make planned bone cuts based on the patient’s anatomy.

Best for:
Patients where customized planning may improve efficiency or alignment.

Key points:
Uses pre-surgery imaging and customized guides.

⸻

Implant Design Options

Cruciate-Retaining Knee

The surgeon keeps the patient’s posterior cruciate ligament if it is healthy.

Posterior-Stabilized Knee

The posterior cruciate ligament is removed and replaced by a mechanical stabilizing design in the implant.

Constrained Knee

Used when ligaments are weak or unstable.

Hinged Knee

Used in complex revision cases, severe deformity, or major ligament loss.

⸻

Patient Decision Support

Patients should ask:

1. Which approach is best for my knee condition?

2. Do I need robotic or computer-assisted technology?

3. What implant design will be used?

4. How much arthritis, deformity, or ligament damage do I have?

5. What recovery timeline should I expect?

⸻

Professional-Facing Version

Procedure Approach Categories

1. Conventional Manual TKA

Standard exposure with manual instrumentation, intramedullary femoral and extramedullary tibial alignment guides.

Use cases:
Primary OA, RA, post-traumatic arthritis, standard varus/valgus deformity.

Key considerations:
Alignment philosophy, ligament balancing, bone quality, flexion-extension gap symmetry.

⸻

2. Minimally Invasive TKA

Smaller incision with quadriceps-sparing or mid-vastus/subvastus variations.

Advantages:
Reduced early soft-tissue trauma, potential faster early functional gains.

Limitations:
Reduced visualization, risk of component malposition if exposure is inadequate.

⸻

3. Robotic-Assisted TKA

Preoperative CT-based or imageless planning depending on platform.

Core benefits:
Precision bone preparation, implant sizing, real-time gap balancing, controlled resection boundaries.

Clinical value:
Especially useful in complex alignment, deformity, obesity, prior hardware, or customized kinematic planning.

⸻

4. Computer-Navigated TKA

Uses optical trackers, sensors, or navigation arrays to guide alignment and bone cuts.

Applications:
Mechanical axis correction, component rotation, deformity cases, retained hardware where intramedullary guides are difficult.

⸻

5. Patient-Specific Instrumentation

Preoperative MRI or CT used to create custom cutting blocks.

Potential benefits:
Preoperative templating, reduced instrument trays, improved workflow.

Limitations:
Accuracy depends on imaging, planning, guide fit, and intraoperative validation.

⸻

Surgical Exposure Options

Medial Parapatellar Approach

Most common approach. Provides broad exposure and reliable visualization.

Midvastus Approach

Splits vastus medialis fibers. May preserve quadriceps mechanism better.

Subvastus Approach

Avoids cutting quadriceps tendon. Technically more demanding.

Quadriceps-Sparing Approach

Least invasive soft-tissue approach, but limited exposure and steep learning curve.

⸻

Alignment Philosophies

Mechanical Alignment

Restores neutral mechanical axis.

Anatomical Alignment

Attempts to recreate native joint line orientation.

Kinematic Alignment

Attempts to restore the patient’s pre-arthritic knee anatomy.

Functional Alignment

Uses robotic/navigation data to balance alignment, soft tissue tension, and implant position.

⸻

Implant Constraint Selection

Implant Type

Indication

Cruciate-retaining

Intact PCL, good ligament balance

Posterior-stabilized

PCL deficiency or surgeon preference

Medial pivot

Designed to mimic medial stability

Varus-valgus constrained

Collateral ligament insufficiency

Rotating hinge

Severe instability, revision, tumor, major bone loss

⸻

LDS Procedure Builder Logic

The module should allow users to compare:

Approach:
Manual vs minimally invasive vs robotic-assisted vs navigation-assisted vs patient-specific.

Exposure:
Medial parapatellar vs midvastus vs subvastus vs quadriceps-sparing.

Alignment strategy:
Mechanical vs kinematic vs functional.

Implant design:
CR vs PS vs medial pivot vs constrained vs hinged.

Technology layer:
Robotic arm, navigation, smart sensors, pressure balancing, patient-specific guides.

Patient factors:
Age, BMI, activity level, deformity, bone quality, ligament stability, prior surgery, inflammatory arthritis.

⸻

LDS Summary Statement

Total knee replacement is not one single procedure. It is a customizable surgical build.
The best approach depends on the patient’s anatomy, arthritis pattern, ligament stability, deformity, activity goals, implant selection, and the technology available to the surgical team.

Total Knee Digital Module, Section 6: Step-by-step workflow

Total Knee Digital Module

Section 6: Step-by-Step Workflow

Patient-Facing Version + Professional-Facing Version

LDS Framework: Communication as the Lifeline of Care

⸻

PATIENT-FACING VERSION

What Happens During a Total Knee Replacement?

Your Step-by-Step Surgical Journey

A Total Knee Replacement (Total Knee Arthroplasty / TKA) is performed to remove damaged joint surfaces and replace them with artificial components designed to restore movement, relieve pain, and improve function.

Most procedures take 60–120 minutes, depending on anatomy, deformity, previous surgery, and technology used.

⸻

Step 1: Preoperative Preparation

Before surgery:

You arrive at the hospital or surgery center

The surgical team will:

• Confirm your identity and procedure

• Review imaging and surgical plan

• Verify allergies and medications

• Start an IV line

• Mark the operative knee

You will meet:

• Orthopedic surgeon

• Anesthesia team

• Nursing staff

• Surgical support team

Common preparation includes:

• Blood pressure and vital signs

• Antibiotics to reduce infection risk

• Compression devices for clot prevention

• Surgical site cleansing

LDS Voice Prompt:

“Today we are replacing your damaged knee joint to reduce pain and help restore mobility.”

⸻

Step 2: Anesthesia

Most knee replacements are performed using:

Regional anesthesia (common)

Often a spinal block combined with sedation.

Benefits may include:

• Less nausea

• Better pain control

• Reduced opioid use

• Faster recovery

General anesthesia

Sometimes used depending on patient condition or surgeon preference.

You will not feel pain during surgery.

⸻

Step 3: Positioning and Sterile Setup

You are positioned safely on the operating table.

The team:

• Pads pressure points

• Positions the operative leg

• Cleans the knee with antiseptic solution

• Applies sterile drapes

This creates a protected sterile environment.

⸻

Step 4: Surgical Incision

The surgeon makes an incision over the front of the knee.

Typical incision:

• Midline incision

• Approximately 4–10 inches

• Size depends on anatomy and technique

The knee joint is carefully exposed while protecting muscles, ligaments, and surrounding tissues.

⸻

Step 5: Joint Exposure

The kneecap (patella) is gently moved aside to access the joint.

The surgeon evaluates:

• Cartilage damage

• Bone wear

• Arthritis severity

• Joint alignment

• Ligament balance

This confirms the surgical plan.

⸻

Step 6: Removal of Damaged Bone and Cartilage

The damaged joint surfaces are removed.

This includes:

Distal femur

Lower end of the thigh bone.

Proximal tibia

Top of the shin bone.

Sometimes the patella

Depending on surgeon preference and patient anatomy.

Special guides or robotic systems help ensure precision.

⸻

Step 7: Bone Preparation and Alignment

The remaining bone is shaped to accept the implants.

Goal:

• Restore alignment

• Improve motion

• Balance the joint

• Create stable implant fixation

Technology may include:

• Manual instrumentation

• Computer navigation

• Robotic assistance

The surgeon repeatedly checks movement and stability.

⸻

Step 8: Trial Components

Temporary trial implants are placed.

The surgeon tests:

• Knee flexion and extension

• Stability

• Implant sizing

• Ligament tension

• Walking mechanics

This helps confirm the best fit before final implantation.

⸻

Step 9: Final Implant Placement

Permanent components are inserted.

Typical implants include:

Femoral component

Metal surface replacing damaged femur.

Tibial component

Metal base attached to tibia.

Polyethylene liner

Smooth plastic surface creating gliding motion.

Patellar component (sometimes)

Resurfacing of kneecap.

Fixation may use:

• Bone cement

• Cementless fixation

• Hybrid techniques

⸻

Step 10: Final Motion and Stability Check

Before closing, the surgeon confirms:

• Alignment

• Range of motion

• Stability

• Implant tracking

• Patellar movement

• Bleeding control

The knee is moved through its full range.

⸻

Step 11: Closure

The knee is closed in layers.

Closure may include:

• Sutures

• Staples

• Absorbable materials

• Surgical adhesive

Dressings are applied.

Some surgeons use:

• Compression wraps

• Cryotherapy systems

• Negative-pressure dressings

⸻

Step 12: Recovery Room (PACU)

After surgery:

You move to the Post-Anesthesia Care Unit (PACU).

The team monitors:

• Pain

• Blood pressure

• Oxygen

• Circulation

• Knee function

Many patients begin moving the knee and standing within hours.

⸻

Step 13: Early Mobilization and Rehabilitation

Movement starts early.

Goals:

• Walking

• Knee bending

• Strength recovery

• Prevent blood clots

• Restore independence

Physical therapy is critical.

Typical milestones:

Day 0–1: Standing and walking

Week 2–6: Improved motion and strength

Month 2–3: Return to many activities

Month 3–12: Continued healing and functional improvement

⸻

PROFESSIONAL-FACING VERSION

Total Knee Arthroplasty (TKA) Surgical Workflow

⸻

1. Preoperative Planning

Review:

• Weight-bearing radiographs

• Alignment

• Mechanical axis

• Implant templating

• Bone loss

• Deformity

• Ligament status

Technology planning:

• Conventional

• Computer-assisted

• Robotic workflow

Pre-op considerations:

• Infection screening

• VTE risk

• Medical optimization

• ERAS pathway

⸻

2. Anesthesia and Regional Block

Common strategies:

• Spinal anesthesia

• Adductor canal block

• IPACK block

• General anesthesia when indicated

Goals:

• Multimodal pain control

• Early ambulation

• Reduced opioid exposure

⸻

3. Positioning and OR Setup

Typical setup:

• Supine position

• Tourniquet optional

• Leg holder or padded bump

• Knee flexion capability >120°

Equipment:

• Power instruments

• Navigation/robotics if used

• Cement preparation

• Pulse lavage

• Implant trays

⸻

4. Surgical Exposure

Common approach:

Medial parapatellar arthrotomy

Alternatives:

• Midvastus

• Subvastus

• Quadriceps-sparing

Goals:

• Adequate visualization

• Soft tissue preservation

• Safe exposure

⸻

5. Femoral and Tibial Preparation

Bone resections performed using:

Conventional guides

Intramedullary or extramedullary alignment.

Navigation/robotics

Real-time planning and precision execution.

Resections:

• Distal femur

• Proximal tibia

• Femoral sizing/cuts

⸻

6. Gap Balancing and Soft Tissue Management

Critical workflow phase.

Assess:

• Extension gap

• Flexion gap

• Coronal balance

• Rotational alignment

Potential releases:

• MCL

• Posteromedial capsule

• IT band

• Lateral structures in valgus knees

Goal:

Balanced, stable knee through ROM.

⸻

7. Trial Reduction

Trial evaluation:

• Component sizing

• Tracking

• ROM

• Stability

• Patellar mechanics

• Flexion-extension symmetry

Decision points:

• Polyethylene thickness

• Constraint level

• Alignment modifications

⸻

8. Implant Fixation

Implant strategies:

Cemented

Most common.

Cementless

Increasing use in selected patients.

Hybrid

Selective fixation.

Critical considerations:

• Bone quality

• Cement mantle

• Press-fit stability

⸻

9. Patellar Management

Approaches:

• Resurfacing

• Selective resurfacing

• Retention

Assess:

• Tracking

• Thickness

• Tilt

• Subluxation

⸻

10. Final Assessment and Hemostasis

Confirm:

• Mechanical alignment

• Stability

• Tracking

• ROM

• Bleeding control

Adjuncts:

• Pulse lavage

• Hemostatic agents

• TXA protocols

⸻

11. Closure

Layered closure:

• Arthrotomy

• Deep tissue

• Subcutaneous layer

• Skin

Options:

• Staples

• Running absorbable closure

• Barbed sutures

• Skin adhesive

⸻

12. Postoperative Pathway

ERAS goals:

• Same-day or short stay

• Multimodal analgesia

• Early PT

• VTE prophylaxis

• Rapid functional recovery

Standard monitoring:

• Neurovascular status

• Pain control

• Wound integrity

• Mobility milestones

⸻

LDS Visual / Interactive Layer Recommendations

For the Total Knee Step-by-Step Workflow Module, include:

Patient Layer

• 3D animated knee replacement surgery

• “Day in the Life of Knee Replacement” walkthrough

• Voice-guided surgery explanation

• Recovery timeline animation

Professional Layer

• Robotic vs conventional TKA workflow toggle

• Implant positioning simulator

• Gap balancing visualization

• Ligament tension and alignment overlays

• OR setup and instrument mapping module

LDS Principle:

We Don’t Just Inform — We Connect.

This workflow explains not only what happens during knee replacement, but why each surgical step matters to patient outcomes and procedural success.

Total Knee Digital Module, Section 7: Critical View of Safety module

Total Knee Digital Module

Section 7: Critical View of Safety Module

1. What “Critical View of Safety” Means in Total Knee Replacement

In gallbladder surgery, the Critical View of Safety confirms anatomy before cutting.

In Total Knee Arthroplasty, the safety equivalent is:

Confirm the knee is correctly aligned, balanced, stable, tracking, and safely implanted before final components are placed.

This is the TKA Safety View.

⸻

Patient-Facing Version

The surgeon checks 5 major safety points

1. Is the leg straight?

The surgeon checks that the new knee restores proper leg alignment.

2. Is the knee balanced?

The inside and outside ligaments must feel even, not too tight or too loose.

3. Does the knee bend and straighten smoothly?

The surgeon tests motion before the final implant is placed.

4. Does the kneecap track correctly?

The kneecap should glide smoothly in the center of the knee.

5. Are the trial implants stable?

Temporary trial pieces are tested before the permanent implants are inserted.

⸻

Professional-Facing Version

TKA Critical Safety Checkpoints

1. Alignment Confirmation

Confirm coronal, sagittal, and rotational alignment of femoral and tibial components. TKA success depends heavily on limb alignment, component positioning, ligament stability, ROM, and patellar tracking.  

2. Extension Gap Assessment

Verify full extension without recurvatum or flexion contracture.

3. Flexion Gap Assessment

Confirm balanced medial/lateral gaps at 90° flexion.

4. Ligament Balance

Evaluate MCL/LCL tension, varus-valgus stability, and flexion-extension symmetry.

5. Tibial Rotation

Confirm tibial tray rotation using anatomic landmarks and trial tracking.

6. Femoral Rotation

Avoid internal rotation; confirm balanced flexion gap and patellofemoral tracking.

7. Patellar Tracking

Assess central tracking through ROM before closure.

8. Trial Reduction

Test ROM, stability, rollback, patellar behavior, and implant sizing before cementation/final fixation.

⸻

LDS “Do Not Proceed” Safety Rules

Do not implant final components until:

• Alignment is acceptable

• Flexion and extension gaps are balanced

• Knee is stable in extension, mid-flexion, and flexion

• Patella tracks properly

• Trial implants move smoothly

• No major instability, malrotation, or impingement is present

⸻

Visual Module Concept

Interactive Safety Dashboard

Green = Safe to Proceed

Yellow = Adjust / Recheck

Red = Do Not Proceed

Dashboard Tiles

1. Alignment

2. Bone cuts

3. Extension gap

4. Flexion gap

5. Ligament balance

6. Tibial rotation

7. Femoral rotation

8. Patellar tracking

9. Trial ROM

10. Final implant readiness

⸻

LDS Voiceover Script

“Before the final knee replacement implants are placed, the surgeon performs a safety check. The leg alignment is checked, the ligaments are balanced, the knee is moved through a full range of motion, and the kneecap is observed to make sure it tracks smoothly. This step helps reduce the risk of stiffness, instability, pain, implant wear, and revision surgery.”

⸻

Section 7 Summary

The Critical View of Safety in Total Knee Replacement is not one single view.

It is a multi-step confirmation system:

Align the limb. Balance the ligaments. Test the motion. Confirm the tracking. Then implant.

Total Knee Digital Module, Section 8: Device and supply stack

Total Knee Digital Module

Section 8: Device and Supply Stack

LDS Format – Patient Intelligence + Professional Intelligence Layer

⸻

PATIENT-FACING VERSION

What Devices and Supplies Are Used in a Total Knee Replacement?

A Total Knee Replacement (Total Knee Arthroplasty – TKA) is performed using a carefully coordinated set of medical devices, implants, surgical instruments, and sterile supplies.

Think of the procedure like a precision-engineered reconstruction of the knee joint.

The surgeon removes damaged cartilage and bone and replaces them with specially designed implants that restore motion, alignment, and function.

⸻

1. Core Implant Components

A total knee replacement typically contains three primary implant components.

A. Femoral Component (Thigh Bone Implant)

This metal implant covers the end of the femur.

Purpose:

• Replaces damaged cartilage

• Restores smooth joint motion

• Forms the top half of the new knee

Typical Materials:

• Cobalt-chromium alloy

• Titanium alloy

• Oxidized zirconium (selected systems)

⸻

B. Tibial Component (Shin Bone Implant)

This implant sits on the top of the tibia.

Usually includes:

Metal Baseplate

+

Plastic Insert

Purpose:

• Creates stable weight-bearing surface

• Supports motion

• Transfers body load

⸻

C. Polyethylene Insert (Spacer)

The spacer sits between metal components.

Purpose:

• Acts as cartilage substitute

• Reduces friction

• Provides shock absorption

• Allows smooth flexion and extension

Material:

Highly Cross-Linked Polyethylene (HXLPE)

⸻

D. Patellar Component (Optional)

Some surgeons resurface the kneecap.

This may involve:

• Polyethylene button

• Patellar implant

Purpose:

• Improve patellar tracking

• Reduce anterior knee pain

• Create smoother motion

⸻

2. Implant Design Options

Not every knee replacement is built the same.

Surgeons select implant design based on:

• Anatomy

• Ligament stability

• Bone quality

• Deformity

• Activity level

⸻

Posterior Stabilized (PS)

Uses a cam-post mechanism.

When Used:

• PCL removed

• Added stability needed

Advantages

• Predictable motion

• Good flexion

⸻

Cruciate Retaining (CR)

Preserves posterior cruciate ligament.

When Used:

• Intact PCL

• Stable knee

Advantages

• More natural knee mechanics

⸻

Constrained / Hinged Systems

Used in complex cases.

Examples:

• Severe deformity

• Revision surgery

• Major instability

⸻

3. Surgical Navigation and Technology

Modern TKA increasingly uses technology for precision.

⸻

Robotic-Assisted TKA

Robotic systems help surgeons:

• Plan bone cuts

• Improve implant alignment

• Balance ligaments

• Increase precision

Examples include:

• Robotic arm platforms

• CT-based planning systems

• Image-guided systems

Patients should understand:

The robot does not perform surgery alone.

The surgeon remains in full control.

⸻

Computer Navigation

Provides real-time positioning data.

Purpose:

• Alignment guidance

• Bone cut accuracy

• Mechanical axis restoration

⸻

Smart Instrumentation

Includes:

• Digital tensioning systems

• Gap balancing tools

• Sensor-assisted devices

Goal:

Create balanced motion and stability.

⸻

4. Surgical Instrument Stack

The implant cannot be placed without a specialized instrument system.

⸻

Cutting Guides

Precision guides determine:

• Bone resection depth

• Alignment

• Rotation

⸻

Alignment Rods

Help orient implants relative to leg axis.

⸻

Trial Components

Temporary implants used during surgery.

Purpose:

• Confirm size

• Test motion

• Check stability

• Evaluate ligament balance

⸻

Bone Preparation Instruments

Used to shape bone.

Examples:

• Oscillating saw

• Burrs

• Reamers

• Punches

• Rongeurs

⸻

Cement Delivery System

If cemented fixation used:

Supplies include:

• Vacuum mixer

• Cement gun

• Pressurization tools

⸻

5. Fixation Materials

Implants must attach securely to bone.

Two primary methods exist.

⸻

Cemented Fixation

Most common.

Uses:

PMMA Bone Cement

Purpose:

• Immediate fixation

• Reliable stability

• Widely used

⸻

Cementless Fixation

Implant surface designed for bone ingrowth.

Features:

• Porous coating

• Biologic fixation

More common in:

• Younger patients

• Good bone quality

⸻

6. Sterile Disposable Supply Stack

Every TKA uses a large sterile support system.

Typical supplies:

Access + Exposure

• Drapes

• Towels

• Skin prep

• Retractors

• Suction tubing

Hemostasis

• Electrocautery pencils

• Smoke evacuation

• Tourniquet systems

Closure Supplies

• Sutures

• Staples

• Adhesives

• Dressings

Irrigation

• Sterile saline

• Pulse lavage systems

⸻

7. Imaging and OR Equipment

Operating room equipment supports accuracy and safety.

Typical equipment:

• OR table

• Positioners

• Surgical lights

• Power systems

• Sterile instrument trays

• Implant inventory

• Imaging systems (selected cases)

⸻

PROFESSIONAL-FACING VERSION

Total Knee Device and Supply Intelligence Layer

The TKA device stack functions as an integrated procedural ecosystem.

⸻

Implant System Layer

Major implant manufacturers frequently include:

• Zimmer Biomet

• Stryker

• DePuy Synthes

• Smith & Nephew

• Exactech

• MicroPort

Typical implant categories:

Femoral Components

• CoCr

• Titanium

• Oxinium variants

Tibial Baseplates

• Cemented

• Porous-coated

• Keel or stem options

Inserts

• Conventional PE

• HXLPE

• Vitamin-E stabilized PE

⸻

Instrumentation Layer

Procedural sets commonly include:

Standard Instrument Sets

• Distal femoral guides

• Tibial cutting blocks

• Intramedullary/Extramedullary guides

• Trialing systems

Patient-Specific Instrumentation (PSI)

May use:

• MRI/CT planning

• Disposable custom guides

⸻

Robotic / Digital Layer

Technology platforms increasingly integrated.

Examples:

Robotic

• MAKO

• ROSA

• VELYS

Navigation

• Optical

• Accelerometer-based

• CT-enabled

Capabilities:

• Gap balancing

• Kinematic planning

• Alignment analytics

• Ligament tension mapping

⸻

Pharmaceutical + Device Interaction Layer

Section 8 interfaces closely with:

Section 9 – Pharma Layer

Typical interactions:

• Antibiotic cement

• Tranexamic acid protocols

• Local anesthetic infiltration

• Hemostasis protocols

⸻

LDS Procedure Builder Integration

Within the Let’s Do Surgery Procedure Builder, the TKA stack can become selectable and configurable.

Example:

Build Your Knee Replacement

Implant

• CR

• PS

• Constrained

Fixation

• Cemented

• Cementless

• Hybrid

Technology

• Conventional

• Navigation

• Robotic

Patella

• Resurface

• Preserve

Manufacturer

• User selectable

• Surgeon preference

• Facility inventory

⸻

LDS Connection Layer

Device stack transparency creates connection opportunities between:

Patient ↔ Surgeon ↔ Device Representative ↔ Facility

Potential LDS overlays:

• Implant technology explanations

• Manufacturer profiles

• Robotics availability

• Facility inventory mapping

• Rep support integration

• Procedure Builder comparison tools

⸻

LDS Core Message

We Don’t Just Inform — We Connect.

The Total Knee device and supply stack is not simply a list of tools — it is the engineered system that allows a surgeon to restore movement, reduce pain, and personalize care for each patient.

Visualization

• laparoscope

• camera head

• light source

• insufflator

Dissection

• Maryland dissector

• hook cautery

• blunt grasper

• atraumatic grasper

• suction irrigator

Hemostasis / division

• clip applier

• laparoscopic clips

• energy device if used

Specimen handling

• endoscopic retrieval bag

Closure

• fascial closure device

• sutures

• skin adhesive / steri-strips / staples

LDS feature:

Every step opens the relevant devices, manufacturers, SKU fields, rep contacts, and preference-card notes.

Total Knee Digital Module, Section 9: Pharma layer

Total Knee Digital Module

Section 9: Pharma Layer

LDS Framework | Patient Intelligence + Professional Intelligence

⸻

SECTION 9A: Patient-Facing Version

Pharmaceutical Support During Total Knee Replacement (TKR)

Why Medications Matter in Knee Replacement Surgery

A Total Knee Replacement (TKR) is not only a mechanical procedure involving implants and surgical tools—it is also supported by carefully selected medications that help patients:

• Prevent infection

• Control pain

• Reduce inflammation

• Prevent blood clots

• Manage nausea

• Support healing and recovery

The medication plan begins before surgery, continues during the operation, and extends into recovery at home.

⸻

1. Preoperative Medications (Before Surgery)

These medications prepare the body for surgery and improve outcomes.

Antibiotics

Given before incision to prevent infection.

Common examples:

• Cefazolin (Ancef)

• Clindamycin

• Vancomycin

Purpose:

• Reduce surgical site infection risk

• Protect implant from bacterial contamination

⸻

Pain Preparation (Preemptive Analgesia)

Pain medications may be given before surgery to reduce postoperative discomfort.

Common medications:

• Acetaminophen (Tylenol)

• Celecoxib (Celebrex)

• Gabapentin or Pregabalin

Purpose:

• Lower pain signals before surgery begins

• Reduce opioid requirements later

⸻

Anxiety / Sedation Medication

Patients may receive light sedation before entering the OR.

Examples:

• Midazolam (Versed)

Purpose:

• Relaxation

• Anxiety reduction

• Improved comfort

⸻

2. Intraoperative Medications (During Surgery)

These medications support the surgical procedure.

⸻

Anesthesia

TKR may be performed under:

Spinal Anesthesia

Common for knee replacement.

Benefits:

• Less nausea

• Lower opioid use

• Faster recovery

• Lower blood loss

Medications:

• Bupivacaine

• Lidocaine

⸻

General Anesthesia

Patient fully asleep.

Common medications:

• Propofol

• Sevoflurane

• Fentanyl

⸻

Regional Nerve Blocks

Many patients receive targeted pain blocks.

Common blocks:

• Adductor Canal Block

• Femoral Nerve Block

• IPACK Block

Typical medications:

• Ropivacaine

• Bupivacaine

Purpose:

• Numb knee region

• Improve early mobility

• Reduce opioid use

⸻

Tranexamic Acid (TXA)

A major medication in modern TKR.

Purpose:

• Reduce bleeding

• Lower transfusion rates

• Improve recovery

Benefits:

• Less blood loss

• Reduced swelling

• Faster rehabilitation

⸻

Antibiotic Redosing

Long surgeries may require additional antibiotic dosing.

Goal:

• Maintain sterile protection throughout surgery

⸻

3. Postoperative Medications (Recovery Phase)

After surgery, medications focus on pain control and safe recovery.

⸻

Pain Control

Modern TKR uses multimodal pain management.

This means using several medications together rather than relying on opioids alone.

Common medications:

Non-opioid Pain Relief

• Acetaminophen

• Celecoxib

• Ketorolac (Toradol)

Purpose:

• Reduce inflammation

• Improve comfort

• Minimize narcotic need

⸻

Opioids (Short-Term Use)

Used when stronger pain relief is needed.

Examples:

• Oxycodone

• Hydrocodone

• Morphine

Purpose:

• Severe pain control

Important:

• Usually temporary

• Goal is early reduction

⸻

Blood Clot Prevention (DVT Prophylaxis)

Knee replacement increases risk of:

• Deep Vein Thrombosis (DVT)

• Pulmonary Embolism (PE)

Common medications:

• Aspirin

• Enoxaparin (Lovenox)

• Apixaban (Eliquis)

• Rivaroxaban (Xarelto)

Purpose:

• Prevent dangerous blood clots

⸻

Anti-Nausea Medications

Help prevent postoperative nausea.

Examples:

• Ondansetron (Zofran)

• Dexamethasone

Purpose:

• Improve comfort

• Encourage eating and walking

⸻

Constipation Prevention

Pain medications may slow bowel function.

Common support:

• Docusate

• Senna

• Polyethylene glycol (Miralax)

Goal:

• Maintain normal bowel activity

⸻

Patient Medication Timeline

Surgery Phase

Medication Goal

Before Surgery

Prevent infection + prepare for pain

During Surgery

Anesthesia + bleeding + comfort

Immediately After

Pain + nausea + mobility

Home Recovery

Healing + clot prevention + taper pain meds

⸻

LDS Patient Insight

The implant replaces the knee—but medications help the body safely accept and recover from the surgery.

Successful TKR depends on:

Implant + Surgery + Medication Strategy + Rehabilitation

⸻

SECTION 9B: Professional-Facing Version

Professional Pharma Intelligence Layer – Total Knee Arthroplasty (TKA)

⸻

1. Perioperative Pharmaceutical Architecture

Modern TKA pharma strategy focuses on:

Enhanced Recovery After Surgery (ERAS)

Goals:

• Opioid reduction

• Early ambulation

• Shortened LOS

• Reduced complications

• Improved patient satisfaction

⸻

2. Standard Perioperative Drug Categories

Category

Purpose

Examples

Antibiotics

Infection prevention

Cefazolin, Vancomycin

Analgesics

Pain control

Acetaminophen, NSAIDs

Regional anesthesia

Sensory blockade

Ropivacaine

Antifibrinolytics

Blood conservation

TXA

Anticoagulants

DVT prevention

Aspirin, DOACs

Steroids

Inflammation + nausea

Dexamethasone

Opioids

Rescue analgesia

Oxycodone

GI support

Constipation prevention

Senna

⸻

3. Antibiotic Strategy

Primary Prophylaxis

Typical regimen:

• Cefazolin 2–3 g IV

• Admin within 60 min of incision

Alternatives:

• Vancomycin

• Clindamycin

Considerations:

• MRSA history

• BMI

• Revision TKA

• Allergy profile

⸻

Antibiotic-Loaded Cement (Selected Cases)

Potential agents:

• Gentamicin

• Tobramycin

• Vancomycin

Higher utilization:

• Revision arthroplasty

• Infection risk patients

⸻

4. Blood Management Layer

Tranexamic Acid (TXA)

Common delivery:

IV TXA

Topical TXA

Combined

Clinical goals:

• Reduced EBL

• Lower transfusion rate

• Less hemarthrosis

Typical protocols:

• 1 g IV pre-incision

• Repeat dose closure/postop

⸻

5. Multimodal Analgesia Stack

Typical ERAS pathway:

Preoperative

• Celecoxib

• Acetaminophen

• Gabapentinoid

Intraoperative

• Regional block

• Periarticular injection

Postoperative

• NSAID

• Scheduled APAP

• Opioid rescue

⸻

Periarticular Injection Cocktail

Institution-specific.

Potential components:

• Ropivacaine

• Epinephrine

• Ketorolac

• Morphine

• Steroid

Goals:

• Reduced early pain

• Lower narcotic exposure

• Improved ROM

⸻

6. Regional Anesthesia Intelligence

Current trend:

Adductor Canal Block

Advantages:

• Quadriceps preservation

• Early ambulation

• Lower fall risk

Additional options:

• Femoral block

• IPACK

• Genicular techniques

⸻

7. Anticoagulation Strategy

Risk-stratified protocols increasingly common.

Risk Profile

Common Approach

Standard Risk

Aspirin

Elevated Risk

LMWH

High Risk

DOAC / tailored therapy

Variables:

• Prior VTE

• BMI

• Cancer

• Hypercoagulable state

• Revision surgery

⸻

8. Emerging Pharma Intelligence

Future-facing TKA pharmacology includes:

Long-Acting Local Anesthetics

Examples:

• Liposomal bupivacaine

⸻

Personalized Analgesia

Potential AI-guided strategies:

• Opioid responsiveness

• Genetic metabolism profiles

• Risk prediction

⸻

Infection Prevention Expansion

Research areas:

• Local antimicrobials

• Implant coatings

• Precision prophylaxis

⸻

LDS Professional Intelligence Layer

TKA pharmaceutical management is becoming a precision system—not simply medication administration.

The future model is:

Procedure + Implant + Pharma + Data + Personalized Recovery

This pharma layer supports the LDS vision of a Procedure Builder, where medications, anesthesia, implants, and recovery pathways become transparent, customizable, and intelligence-driven.

Total Knee Digital Module, Section 10: Risks and complications

Total Knee Digital Module

Section 10: Risks and Complications

Patient-Facing Version

Understanding the Risks of Total Knee Replacement

A Total Knee Replacement (TKR) is one of the most successful orthopedic procedures performed today, helping patients reduce pain, improve mobility, and return to daily activities. While most procedures are completed safely with excellent outcomes, every surgery carries potential risks and complications.

Let’s Do Surgery believes informed patients make better decisions.
Understanding possible complications helps patients recognize warning signs and participate in safer recovery.

⸻

Common Surgical Risks

1. Infection

Infection may occur at the incision site or deeper around the knee implant.

What Patients Should Watch For

• Redness

• Warmth around incision

• Drainage

• Fever

• Increasing pain

• Swelling

Treatment May Include

• Antibiotics

• Wound care

• Surgical cleaning (irrigation and debridement)

• Rarely, implant removal or revision surgery

LDS Visual Layer

“Inside an Infection” 3D animation showing bacteria around an implant and immune response.

⸻

2. Blood Clots (Deep Vein Thrombosis – DVT)

After surgery, decreased movement may allow blood clots to form in the leg veins.

Symptoms

• Calf pain

• Swelling

• Tenderness

• Warmth

• Leg discoloration

If a clot travels to the lungs (Pulmonary Embolism – PE), it becomes a medical emergency.

Emergency Symptoms

• Chest pain

• Shortness of breath

• Rapid heartbeat

• Sudden dizziness

Prevention

• Early walking

• Compression devices

• Blood-thinning medications

• Leg exercises

LDS Animation

“How Blood Clots Form After Surgery.”

⸻

3. Bleeding and Hematoma

Some bleeding is expected after surgery, but excessive bleeding or blood collection (hematoma) may require treatment.

Possible Signs

• Rapid swelling

• Bruising

• Increasing pain

• Wound drainage

Treatment

• Observation

• Compression

• Rarely return to operating room

⸻

4. Implant Loosening or Failure

Artificial knee components may loosen or wear over time.

Causes

• Implant wear

• Bone loss

• High activity

• Infection

• Mechanical stress

Symptoms

• New pain

• Instability

• Clicking

• Reduced function

Possible Treatment

• Physical therapy

• Revision surgery

⸻

5. Knee Stiffness and Limited Motion

Some patients develop reduced flexibility following surgery.

Risk Factors

• Scar tissue

• Delayed rehabilitation

• Severe preoperative stiffness

• Pain limiting motion

Management

• Aggressive physical therapy

• Home exercises

• Manipulation under anesthesia (MUA) if needed

Recovery Goal

Most patients aim for:

• 90° flexion for daily activities

• 110–120° for greater comfort and mobility

⸻

6. Persistent Pain

Most patients experience major pain improvement, but some continue to have discomfort.

Causes May Include

• Scar sensitivity

• Nerve irritation

• Implant alignment issues

• Infection

• Soft tissue imbalance

LDS Patient Education

Pain Mapping Tool showing common pain locations and potential causes.

⸻

7. Nerve or Blood Vessel Injury

Important nerves and blood vessels travel behind the knee.

Although uncommon, injury may occur.

Symptoms

• Numbness

• Tingling

• Weakness

• Foot drop

• Circulation changes

Management

• Observation

• Neurologic evaluation

• Rare surgical repair

⸻

8. Instability or Dislocation

The knee may feel unstable if ligament balance or implant positioning is imperfect.

Symptoms

• Buckling

• Giving way

• Feeling loose

• Difficulty walking

Treatment

• Bracing

• Therapy

• Revision surgery if severe

⸻

9. Fracture Around the Implant (Periprosthetic Fracture)

Bone surrounding the implant may fracture during or after surgery.

Higher Risk Patients

• Osteoporosis

• Falls

• Older adults

• Revision surgery

Treatment

• Plates

• Screws

• Revision implants

⸻

10. Allergic or Material Sensitivity

Rarely, patients may react to implant materials.

Possible Symptoms

• Persistent swelling

• Skin irritation

• Pain

Implant Materials May Include

• Cobalt-chrome

• Titanium

• Polyethylene

• Ceramic options

Preoperative allergy discussion may be helpful.

⸻

11. Anesthesia Risks

Anesthesia is generally very safe but carries potential risks.

Possible Complications

• Nausea

• Vomiting

• Temporary confusion

• Allergic reactions

• Breathing issues

• Cardiac complications

The anesthesia team evaluates these risks before surgery.

⸻

12. Revision Surgery

Some knee replacements eventually require another operation.

Reasons

• Implant wear

• Infection

• Loosening

• Fracture

• Instability

Revision surgery is typically more complex than first-time replacement.

⸻

Warning Signs — When to Call Your Surgeon

Patients should seek medical attention for:

✓ Fever
✓ Increasing redness
✓ Drainage
✓ Severe swelling
✓ Calf pain
✓ Shortness of breath
✓ Chest pain
✓ Sudden inability to move the knee
✓ Worsening pain

⸻

Professional-Facing Version

Risk and Complication Intelligence Layer

Total Knee Arthroplasty complications involve mechanical, infectious, thromboembolic, neurovascular, and biologic domains. Prevention depends on patient optimization, operative precision, and coordinated postoperative care.

⸻

Major Complication Categories

Category

Examples

Prevention Strategy

Infectious

Superficial/deep PJI

Antibiotics, sterile technique, optimization

Thromboembolic

DVT / PE

Chemoprophylaxis, early mobilization

Mechanical

Loosening, instability

Alignment and ligament balancing

Neurovascular

Nerve/vessel injury

Exposure awareness

Motion-related

Arthrofibrosis

Early ROM protocol

Biologic

Metal sensitivity

Patient selection

⸻

Periprosthetic Joint Infection (PJI)

Risk Factors

• Diabetes

• Obesity

• Smoking

• Malnutrition

• Immunosuppression

• Prior surgery

Diagnostic Workup

• ESR

• CRP

• Synovial aspiration

• Cell count

• Culture

• Imaging

Treatment Pathways

• DAIR

• One-stage revision

• Two-stage revision

⸻

Arthrofibrosis

Contributors

• Delayed rehab

• Pain inhibition

• Poor pre-op ROM

• Technical factors

Intervention

• Intensive PT

• MUA

• Arthroscopic lysis

• Revision if structural cause exists

⸻

Mechanical Failure

Failure Modes

• Aseptic loosening

• Polyethylene wear

• Malalignment

• Instability

• Patellofemoral dysfunction

Professional LDS Overlay

Alignment and balancing simulator comparing mechanical and kinematic alignment effects.

⸻

Neurovascular Considerations

Structures at Risk

• Common peroneal nerve

• Popliteal artery

• Genicular vessels

High-Risk Situations

• Severe deformity

• Revision surgery

• Posterior capsular release

• Flexion contracture correction

⸻

Implant Survivorship and Revision Intelligence

Typical implant survival:

Time

Estimated Survivorship

10 years

90–95%

15 years

85–90%

20 years

Variable

Revision burden influenced by:

• Implant design

• Surgical technique

• Activity level

• Patient biology

• Infection prevention

⸻

LDS Intelligence Layer

Risks Are Not Just Problems — They Are Decision Points

The LDS Total Knee Module frames complications as part of Decision → Direction → Connection:

Decision

• Understand realistic risks

• Compare implant and approach options

• Review complication probabilities

Direction

• Match with appropriate surgeon and center

• Identify high-volume arthroplasty programs

• Technology and revision capability overlays

Connection

• Surgeon

• Physical therapy

• Implant manufacturers

• Pharma and rehabilitation support

⸻

LDS Visual + Digital Assets

Patient Layer

• 3D complication library

• Blood clot animation

• Infection simulator

• Recovery warning dashboard

• Voice-guided complication education

Professional Layer

• Revision intelligence dashboard

• Failure mode analytics

• Implant survivorship tracking

• Risk prediction modeling

• Registry integration concepts

LDS Principle:
“The safest surgery is informed, optimized, and connected.”

Total Knee Digital Module, Section 11: Recovery pathway

Total Knee Digital Module

Section 11: Recovery Pathway

LDS Format | Patient-Facing + Professional Intelligence Layer
Theme: Communication as the Lifeline of Care

⸻

SECTION 11 — RECOVERY PATHWAY

Patient-Facing Version

Recovery After Total Knee Replacement (TKA)

What Happens After Surgery?

A Total Knee Replacement (TKA) recovery is a step-by-step healing process designed to:

• Reduce pain

• Restore movement

• Improve walking and function

• Build strength and stability

• Return patients to everyday life

Recovery begins immediately after surgery and continues for several months.

The most important part of recovery is:

Movement + Rehabilitation + Communication with your care team.

⸻

Phase 1: Immediate Recovery (0–24 Hours)

Recovery Room (PACU)

After surgery, patients are moved to the:

Post-Anesthesia Care Unit (PACU)

The care team monitors:

• Blood pressure

• Heart rate

• Oxygen level

• Pain control

• Nausea

• Leg circulation

• Surgical dressing

Common experiences:

• Grogginess

• Knee numbness

• Swelling

• Tightness

• Mild discomfort

Many patients receive:

• Ice therapy

• Compression devices

• Pain medication

• Early mobilization support

⸻

Early Walking

Most patients stand and walk:

Within hours of surgery

A physical therapist assists with:

• Standing

• Weight-bearing

• Walker use

• Short hallway walking

This helps prevent:

• Blood clots

• Lung complications

• Muscle weakness

• Joint stiffness

⸻

Phase 2: Hospital or Surgery Center Recovery (Day 1–3)

Modern knee replacement recovery is often:

• Same-day discharge

• Overnight stay

• Short inpatient stay

Depends on:

• Age

• Medical history

• Home support

• Pain control

• Mobility

Goals before discharge:

✓ Safe walking
✓ Controlled pain
✓ Knee bending progress
✓ Bathroom independence
✓ Understanding home instructions

⸻

Pain Management During Recovery

Pain is expected but usually manageable.

Pain control uses a multimodal approach:

• Nerve blocks

• Local anesthetic

• Acetaminophen

• NSAIDs

• Limited opioids

• Ice and elevation

• Physical therapy

Patients often describe pain as:

• Pressure

• Tightness

• Muscle soreness

• Swelling discomfort

Severe uncontrolled pain should be reported.

⸻

Phase 3: Home Recovery (Week 1–6)

This is the most active recovery phase.

Daily goals include:

• Walking more

• Improving motion

• Reducing swelling

• Regaining strength

• Increasing independence

Common tools:

• Walker

• Cane

• Compression stockings

• Ice machine

• Exercise program

⸻

Typical Motion Milestones

Common rehabilitation goals:

Week 1–2:

• Knee straightening

• 70–90° flexion

Week 3–6:

• 90–120° flexion

• Improved walking

• Stair training

Flexibility improves gradually.

Every patient heals differently.

⸻

Physical Therapy

Physical therapy is one of the most important parts of recovery.

Goals:

• Restore motion

• Improve balance

• Build strength

• Normalize walking

Typical exercises:

• Heel slides

• Quad sets

• Straight leg raises

• Stationary bike

• Gait training

Therapy may occur:

• Home PT

• Outpatient PT

• Hybrid programs

• Digital rehabilitation platforms

⸻

Managing Swelling

Swelling is normal.

It may last:

• Weeks

• Sometimes months

Helpful strategies:

• Ice

• Leg elevation

• Compression

• Walking

• Avoiding prolonged sitting

Swelling usually improves gradually.

⸻

Phase 4: Functional Recovery (6–12 Weeks)

Most patients notice:

• Less pain

• Better walking

• Improved stability

• Greater confidence

Common milestones:

• Driving (provider dependent)

• Returning to desk work

• Improved sleep

• Reduced assistive device use

Many patients resume:

• Shopping

• Social activities

• Light exercise

⸻

Phase 5: Long-Term Recovery (3–12 Months)

Healing continues long after surgery.

The knee becomes:

• Stronger

• Less swollen

• More flexible

• More natural feeling

Patients may continue improving for:

Up to one year

Goals include:

• Comfortable walking

• Improved endurance

• Better quality of life

• Long-term implant success

⸻

Warning Signs — When to Contact Your Surgeon

Call your care team if you develop:

• Fever

• Increasing redness

• Drainage

• Severe swelling

• Chest pain

• Shortness of breath

• Calf pain

• Sudden loss of motion

• Uncontrolled pain

These may signal:

• Infection

• Blood clot

• Implant complication

• Medical emergency

⸻

LDS Recovery Timeline

Time

Typical Recovery Milestone

Day 0

Surgery + standing/walking

Day 1–3

Discharge + home transition

Week 1–2

Swelling control + motion gains

Week 3–6

Strength + walking improvement

Week 6–12

Functional recovery

Month 3–12

Continued healing + full adaptation

⸻

Professional-Facing Version

TKA Recovery Intelligence Layer

Recovery success depends on:

1. Enhanced Recovery Pathways (ERAS)

Protocols emphasize:

• Early ambulation

• Multimodal analgesia

• Reduced opioid exposure

• Shortened LOS

• Patient education

⸻

2. Rehabilitation Metrics

Common monitored parameters:

ROM goals:

• Full extension

• 90° flexion early

• 110–120° functional flexion

Functional scores:

• KOOS

• WOMAC

• PROMIS

• Oxford Knee Score

Mobility measures:

• Timed Up and Go (TUG)

• Gait assessment

• Stair function

⸻

3. DVT Prevention

Standard strategies:

Mechanical:

• SCDs

• Early ambulation

• Compression

Pharmacologic:

• Aspirin

• LMWH

• DOACs

• Institution-specific prophylaxis

Risk stratification is critical.

⸻

4. Postoperative Monitoring

Clinical surveillance includes:

• Wound healing

• Hematoma

• Persistent drainage

• Infection markers

• Neurovascular status

• Arthrofibrosis risk

• Implant stability

⸻

5. Recovery Technologies

Emerging tools:

• Remote monitoring

• Wearable motion sensors

• Digital PT platforms

• Tele-rehabilitation

• AI recovery analytics

• Patient engagement apps

These technologies align with the LDS Direction + Connection model by extending care beyond the hospital.

⸻

LDS Patient Decision Support

Patients commonly ask:

• How long until I walk normally?

• How much pain should I expect?

• When can I drive?

• Will therapy hurt?

• How long before my new knee feels natural?

LDS Recovery Principle:

Recovery is not just healing from surgery — it is learning how to move, function, and live with a new joint.

Total Knee Digital Module,

Section 12: Patient decision support

Total Knee Digital Module

Section 12: Patient Decision Support

Patient-facing version

Should I consider total knee replacement?

Total knee replacement may be considered when knee arthritis or joint damage is severely affecting daily life and non-surgical treatments are no longer working.

You may be ready to discuss surgery if you have:

• Knee pain that limits walking, stairs, standing, sleep, or daily activities

• Pain that continues despite medications, injections, bracing, weight loss, or physical therapy

• Stiffness, swelling, instability, or deformity of the knee

• X-rays showing advanced arthritis or joint space loss

• A major decline in quality of life

The goal of total knee replacement is not just to replace the joint. The goal is to help the patient return to safer movement, less pain, and better function.

⸻

The patient decision pathway

1. Understand the problem

The patient should know:

What is wrong with my knee?
Most total knee replacements are done for severe osteoarthritis, but they may also be needed for rheumatoid arthritis, post-traumatic arthritis, deformity, or failed prior surgery.

Is the whole knee affected or only one compartment?
This helps determine whether the patient may need total knee replacement or a partial knee replacement.

How bad is the arthritis?
X-rays, exam findings, pain level, and functional limitations all help guide the decision.

⸻

2. Understand the options

Before surgery, patients should understand the full treatment ladder:

Non-surgical options

• Activity modification

• Physical therapy

• Anti-inflammatory medications

• Weight loss when appropriate

• Bracing

• Corticosteroid injections

• Viscosupplementation in select cases

• Assistive devices such as a cane

Surgical options

• Total knee replacement

• Partial knee replacement

• Revision knee replacement if a prior implant has failed

• Realignment procedures in select younger patients

The best option depends on the patient’s anatomy, arthritis pattern, age, activity goals, health status, and expectations.

⸻

3. Understand the procedure

A total knee replacement removes damaged cartilage and bone from the ends of the femur and tibia and replaces them with metal and plastic implant components.

The patient should understand:

• What parts of the knee are replaced

• Whether the kneecap may be resurfaced

• What type of implant may be used

• Whether the procedure will use manual instruments, navigation, robotics, or patient-specific planning

• What anesthesia options are available

• What pain-control plan will be used

• What recovery will look like after surgery

⸻

Key patient questions

Diagnosis questions

• Do I have osteoarthritis, rheumatoid arthritis, or another knee problem?

• Is my arthritis mild, moderate, or severe?

• Is the arthritis in one compartment or the entire knee?

• Do my symptoms match my X-rays?

• Are there other sources of pain, such as hip or spine problems?

Treatment questions

• Have I tried enough non-surgical treatment?

• Would more therapy, injections, weight loss, or bracing help?

• Am I a candidate for partial knee replacement?

• Why are you recommending total knee replacement instead of another option?

• What happens if I wait?

Surgeon questions

• How many total knee replacements do you perform each year?

• Do you perform robotic-assisted or computer-navigated knee replacement?

• What implant systems do you commonly use?

• What is your infection rate, readmission rate, and revision rate?

• Where will the surgery be performed?

Hospital or surgery center questions

• Is this done inpatient or outpatient?

• Does the facility perform a high volume of knee replacements?

• What emergency support is available?

• Will I go home the same day or stay overnight?

• What physical therapy support is available after surgery?

Implant and technology questions

• What implant brand or design will be used?

• Is the implant cemented or cementless?

• Will robotics or navigation be used?

• How does the technology improve alignment, planning, or soft-tissue balancing?

• Are there added costs or insurance considerations?

Recovery questions

• How much pain should I expect?

• When will I walk?

• When can I climb stairs?

• When can I drive?

• When can I return to work?

• How long will I need physical therapy?

• What range of motion should I expect?

• What activities should I avoid after surgery?

⸻

Patient decision scorecard

Patients can use this simple scorecard to organize the decision.

Decision Factor

Low Concern

Moderate Concern

High Concern

Daily knee pain

☐

☐

☐

Trouble walking

☐

☐

☐

Difficulty with stairs

☐

☐

☐

Sleep disruption

☐

☐

☐

Loss of independence

☐

☐

☐

Failed non-surgical care

☐

☐

☐

X-ray arthritis severity

☐

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Fear of surgery

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Recovery support at home

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Work or caregiver responsibilities

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Decision guide:
If pain, function loss, and failed non-surgical care are high, the patient may be ready for a surgical consultation. If fear, medical risk, or lack of home support are high, the patient may need more preparation before surgery.

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Shared decision-making model

The best decision is made when the patient, surgeon, care team, and support system understand the same plan.

Patient priorities

The patient may care most about:

• Pain relief

• Walking farther

• Climbing stairs

• Returning to work

• Avoiding a nursing facility

• Staying independent

• Returning to golf, biking, swimming, or travel

• Avoiding complications

• Understanding implant and technology choices

Surgeon priorities

The surgeon evaluates:

• Arthritis severity

• Knee alignment and deformity

• Range of motion

• Ligament stability

• Bone quality

• Medical risk

• Infection risk

• Realistic outcome expectations

• Implant and technique selection

Care team priorities

The care team helps coordinate:

• Medical clearance

• Pre-op education

• Pain management

• Physical therapy

• Home safety

• Discharge planning

• Follow-up appointments

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“Am I ready?” checklist

A patient may be ready for total knee replacement when:

• ☐ I understand my diagnosis

• ☐ I understand non-surgical and surgical options

• ☐ My pain or disability affects my quality of life

• ☐ I have tried reasonable non-surgical care

• ☐ I understand the risks and benefits

• ☐ I understand the recovery timeline

• ☐ I have a support plan for the first 1–2 weeks

• ☐ I understand that physical therapy is critical

• ☐ I have realistic expectations

• ☐ I have chosen a surgeon and facility I trust

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Professional-facing version

Decision-support objective

The patient decision support layer helps convert diagnosis, imaging, symptoms, comorbidities, goals, and available technology into a structured total knee arthroplasty decision pathway.

The purpose is to support:

• Appropriateness of surgery

• Patient education

• Expectation alignment

• Surgeon selection

• Facility selection

• Implant and technology transparency

• Recovery planning

• Risk reduction

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Clinical decision framework

1. Indication assessment

Total knee arthroplasty is generally considered when there is:

• Advanced symptomatic knee arthritis

• Persistent pain despite appropriate conservative management

• Functional limitation affecting activities of daily living

• Radiographic joint degeneration

• Failure of non-operative treatment

• Patient willingness to participate in rehabilitation

Common indications include:

• Primary osteoarthritis

• Rheumatoid arthritis

• Post-traumatic arthritis

• Severe varus or valgus deformity

• Failed osteotomy or prior knee surgery

• Avascular necrosis involving the knee in select cases

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2. Contraindication and optimization screen

Before proceeding, evaluate:

• Active infection

• Poorly controlled diabetes

• Severe vascular disease

• Severe cardiopulmonary risk

• Open wounds or skin breakdown

• Severe obesity-related risk

• Active dental or systemic infection concerns

• Poor home support

• Unrealistic expectations

• Inability or unwillingness to participate in rehab

Optimization may include:

• Hemoglobin A1c management

• Smoking cessation

• Weight reduction when appropriate

• Dental or infection clearance

• Cardiac clearance

• Medication review

• Anticoagulation planning

• Nutrition assessment

• Prehabilitation

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LDS Patient Decision Engine

Input layer

The platform should collect:

Input Category

Data Points

Symptoms

Pain level, duration, stiffness, swelling, instability

Function

Walking distance, stairs, work limits, sleep disruption

Imaging

X-ray severity, compartment involvement, deformity

Prior treatment

PT, injections, medications, bracing, weight loss

Medical risk

Diabetes, BMI, smoking, cardiac history, anticoagulation

Patient goals

Pain relief, work, sports, travel, independence

Support system

Home assistance, transportation, PT access

Technology preference

Robotics, navigation, implant transparency

Location

ZIP code, travel radius, preferred facility type

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Output layer

The decision engine should generate:

1. Surgery readiness status

Not ready yet
Patient may benefit from further non-operative care, optimization, imaging, or second opinion.

Possibly ready
Patient has significant symptoms but needs more evaluation, education, or medical preparation.

Likely ready for surgical consult
Patient has advanced symptoms, failed conservative treatment, imaging correlation, and realistic goals.

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2. Recommended next step

Examples:

• Schedule orthopedic evaluation

• Obtain standing weight-bearing knee X-rays

• Try structured physical therapy

• Discuss injection options

• Begin medical optimization

• Consider partial vs total knee replacement evaluation

• Seek second opinion

• Review robotic-assisted TKA options

• Build home recovery plan

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3. Patient education match

The system should display targeted education modules based on patient needs:

• Severe pain but mild imaging → “Why symptoms and imaging may not match”

• Severe arthritis, high fear → “What happens step-by-step during surgery”

• High BMI or diabetes → “How optimization lowers complication risk”

• Lives alone → “Planning home support after knee replacement”

• Tech interest → “Robotic vs manual knee replacement”

• Younger patient → “Implant longevity and revision risk”

• Work concern → “Return-to-work planning”

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Surgeon matching criteria

The LDS platform can match patients based on:

Matching Factor

Patient Need

High-volume TKA surgeon

Standard primary TKA

Robotic-assisted TKA surgeon

Technology-focused patient

Revision specialist

Failed prior implant or complex history

Complex deformity surgeon

Severe varus, valgus, flexion contracture

Outpatient-capable surgeon

Healthy patient seeking same-day discharge

Hospital-based surgeon

Higher medical-risk patient

Partial knee specialist

Isolated compartment arthritis

Rapid-recovery program

Patient prioritizing faster mobility

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Facility matching criteria

Facility decision support should consider:

• Inpatient hospital vs ambulatory surgery center

• Joint replacement volume

• Infection-prevention protocols

• Anesthesia and regional block capability

• Physical therapy access

• Emergency backup

• ICU availability for higher-risk patients

• Robotic or navigation platform availability

• Same-day discharge program

• Bundled payment or insurance network status

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Patient decision-support UI concept

Screen 1: “Tell us about your knee”

Inputs:

• Which knee hurts?

• Pain score

• Walking distance

• Stairs difficulty

• Night pain

• Swelling

• Instability

• Prior treatments

Screen 2: “What have you tried?”

Inputs:

• Physical therapy

• NSAIDs or pain medication

• Cortisone injection

• Gel injection

• Weight loss

• Brace

• Cane/walker

• Prior surgery

Screen 3: “What do your images show?”

Inputs:

• Mild, moderate, or severe arthritis

• Bone-on-bone arthritis

• Varus or valgus alignment

• One-compartment vs multi-compartment disease

• Upload X-ray option

Screen 4: “What matters most to you?”

Inputs:

• Pain relief

• Walking

• Stairs

• Work

• Sports

• Travel

• Independence

• Fast recovery

• Technology options

• Avoiding hospital stay

Screen 5: “Your decision pathway”

Outputs:

• Readiness category

• Recommended next step

• Questions to ask surgeon

• Surgeon/facility match type

• Recovery preparation checklist

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LDS conversion layer

The Patient Decision Support section should drive the user toward action:

Primary CTA

Build My Knee Replacement Plan

Secondary CTAs

Compare Surgeons Near Me
Explore Robotic Knee Replacement
Download My Surgery Readiness Checklist
Ask for a Second Opinion
See What Happens Step-by-Step

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Patient-facing closing statement

Total knee replacement is a major decision. The right choice depends on your pain, your X-rays, your daily function, your health, your goals, and your support system.

Let’s Do Surgery helps patients understand the decision before they enter the operating room — so they can ask better questions, compare options, and choose the path that fits them best.

Total Knee Digital Module,

Section 13: Professional intelligence layer

Total Knee Digital Module

Section 13: Professional Intelligence Layer

Purpose

The Professional Intelligence Layer turns the Total Knee Replacement module from patient education into a clinical, operational, and industry-facing intelligence system.

It helps surgeons, hospitals, reps, device companies, and care teams understand:

How the procedure is built, why certain choices are made, what products are used, and how outcomes can be improved.

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1. Professional-Facing Overview

Total Knee Replacement is not just one procedure.

It is a customizable reconstruction of the knee joint based on:

• Patient anatomy

• Severity of arthritis or deformity

• Ligament stability

• Bone quality

• Implant philosophy

• Surgeon preference

• Robotic/navigation availability

• Hospital supply contracts

• Recovery goals

The professional layer explains how each decision affects the final surgical plan.

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2. Core Professional Questions

This section should answer:

What implant design is best for this patient?

Should the case be manual, navigated, or robotic-assisted?

Should the posterior cruciate ligament be retained or substituted?

Is the deformity varus, valgus, flexion contracture, or complex?

What fixation strategy is best: cemented, cementless, or hybrid?

What bearing surface and polyethylene insert are appropriate?

What intraoperative tools, trials, saw guides, cement, implants, and pharma products are needed?

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3. Professional Decision Engine

A. Patient Factors

Inputs:

• Age

• BMI

• Activity level

• Bone quality

• Diabetes status

• Smoking status

• Prior surgery

• Prior infection

• Inflammatory arthritis

• Severe deformity

• Revision risk

• Home support

Output:

Risk-adjusted surgical pathway.

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B. Anatomy & Deformity Factors

Inputs:

• Varus knee

• Valgus knee

• Flexion contracture

• Bone loss

• Patellar tracking

• Ligament balance

• Rotational alignment

• Tibial slope

• Femoral/tibial sizing

• Soft tissue envelope

Output:

Implant, alignment, and balancing strategy.

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C. Technology Factors

Inputs:

• Manual instrumentation

• Computer navigation

• Patient-specific instruments

• Robotic-assisted TKA

• CT-based planning

• Imageless robotic platforms

• Intraoperative balancing tools

Output:

Procedure technology recommendation.

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4. Implant Intelligence Layer

Implant Categories

Category

Professional Consideration

Cruciate-retaining

Preserves PCL when stable and functional

Posterior-stabilized

Uses cam-post mechanism when PCL is removed or deficient

Medial-pivot

Designed to recreate medial stability and kinematics

Constrained condylar

Used for instability, deformity, or ligament insufficiency

Hinged knee

Used for severe instability, major bone loss, tumor, or complex revision

Cementless implants

Often considered in younger or good bone-quality patients

Cemented implants

Common standard for reliable fixation

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5. Device & Supply Intelligence

Core Device Stack

• Femoral component

• Tibial baseplate

• Polyethylene insert

• Patellar component

• Trial implants

• Alignment guides

• Cutting blocks

• Saw blades

• Tibial/femoral preparation instruments

• Cement restrictors if needed

• Bone cement

• Pulse lavage

• Tourniquet

• Suction/drain supplies

• Closure materials

• Dressings

Advanced Technology Stack

• Robotic planning workstation

• CT or imageless planning system

• Tracking pins/arrays

• Robotic arm or navigation camera

• Ligament balancing software

• Gap assessment tools

• Smart trialing systems

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6. Pharma Intelligence Layer

Pre-op

• Antibiotic prophylaxis

• Tranexamic acid protocol

• VTE risk stratification

• Regional anesthesia plan

• Diabetes optimization

• MRSA/MSSA screening/decolonization

Intra-op

• IV antibiotics

• IV/topical TXA

• Local infiltration analgesia

• Periarticular injection cocktail

• Cement additives when indicated

• Antiseptic irrigation protocols

Post-op

• Multimodal pain control

• NSAID or COX-2 inhibitor when appropriate

• Acetaminophen

• Short-course opioid rescue

• Anticoagulation or aspirin pathway

• Antiemetics

• Bowel regimen

• Infection surveillance

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7. OR Workflow Intelligence

Professional Workflow Map

1. Patient selection

2. Imaging and templating

3. Implant planning

4. Anesthesia and block

5. Positioning and prep

6. Exposure

7. Femoral and tibial bone preparation

8. Gap balancing

9. Trialing

10. Patellar assessment/resurfacing decision

11. Final component implantation

12. Cementation or press-fit fixation

13. Closure

14. Dressing

15. Recovery and mobilization

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8. Risk Intelligence Dashboard

Key Risks to Track

• Periprosthetic joint infection

• DVT/PE

• Stiffness

• Arthrofibrosis

• Instability

• Malalignment

• Patellar maltracking

• Aseptic loosening

• Polyethylene wear

• Periprosthetic fracture

• Wound complications

• Revision surgery

Risk Scoring Outputs

• Low-risk outpatient pathway

• Standard inpatient pathway

• High-risk optimization pathway

• Complex deformity pathway

• Revision-risk pathway

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9. Rep & Industry Intelligence

Rep-Facing Value

This module helps reps understand:

• Which implant systems are used

• Which surgeons use robotic platforms

• Which hospitals perform high-volume TKA

• Which products are needed for each case type

• Which cases require advanced constraint or revision options

• Where implant conversion opportunities exist

Industry Data Fields

• Implant manufacturer

• Implant family

• Cemented vs cementless usage

• Robotic vs manual case

• Polyethylene type

• Patella resurfaced or not

• Case complexity

• Length of stay

• Discharge destination

• Complications

• Revision risk

• Surgeon volume tier

• Hospital technology profile

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10. Professional Builder Logic

“Build This Total Knee”

Professional users can configure:

Approach

• Medial parapatellar

• Subvastus

• Midvastus

• Quadriceps-sparing

Alignment Philosophy

• Mechanical alignment

• Kinematic alignment

• Functional alignment

• Restricted kinematic alignment

Technology

• Manual

• Navigation

• PSI

• Robotic-assisted

Implant Design

• CR

• PS

• Medial-pivot

• Constrained

• Hinged

Fixation

• Cemented

• Cementless

• Hybrid

Patella Strategy

• Resurface

• Do not resurface

• Selective resurfacing

Recovery Pathway

• Same-day discharge

• 23-hour observation

• Inpatient admission

• Rehab facility pathway

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11. Surgeon Intelligence Layer

Surgeon Profile Data

• TKA annual volume

• Revision experience

• Robotic platform experience

• Preferred implant system

• Hospital affiliations

• Outpatient TKA capability

• Complex deformity experience

• Infection/revision management

• Patient-reported outcomes

• Telehealth availability

Surgeon Matching Labels

• High-Volume Total Knee Surgeon

• Robotic Knee Replacement Specialist

• Complex Deformity Specialist

• Outpatient Joint Replacement Surgeon

• Revision Knee Specialist

• Cementless Implant Specialist

• Same-Day Discharge Specialist