Post-Operative Instructions For Knee Stiffness Surgery

Post-operative care following knee stiffness surgery (arthrofibrosis management) differs fundamentally from nearly every other knee procedure in one critical principle: rest is the enemy. While rest protects structural repairs in meniscus or ligament surgeries, rest following stiffness surgery allows aggressive fibrous scar tissue to re-form.

Key Post-Operative Guidelines

Immediate Rehabilitation: Physical therapy must begin in the recovery room within hours of surgery. Prolonged rest allows fibrous tissue to re-adhere immediately.
Dynamic Bracing: Utilize a dynamic extension brace for 4 to 8 hours daily during the first 6 weeks to maintain extension gains.
Cryotherapy Protocols: Apply cold packs to the sides of the knee for 15–20 minutes every 2–3 hours. Avoid placing ice directly over open surgical wounds.
Wound & Submersion Rules: Keep dressings clean and dry. Avoid submerging the knee in baths or pools until sutures are removed and incisions are fully healed.

Sleeping Position & Major Precautions

Correct Sleeping Position: Sleep flat on your back with the foot/ankle elevated on pillows to keep the knee fully extended.
CRITICAL ERROR — Pillows Under Knee: Never place a pillow directly beneath the bend of the knee during sleep. This keeps the joint in partial flexion, encouraging rapid recurrent arthrofibrosis.
Things to Avoid: Prolonged immobility, sitting with the knee bent at sharp angles for hours, discontinuing dynamic bracing prematurely when pain subsides, or delaying physical therapy “until the wound heals”.

Activity Timeline

Activity	Manipulation Under Anesthesia (MUA)	Arthroscopic / Open LOA
Ambulation / Walking	Immediate on Day 1	Immediate (with crutches/support)
Stairs & Desk Work	Weeks 1–2	Weeks 4–6
Driving	Weeks 2–3	Weeks 6–8
Swimming	Weeks 3–4	Months 2–3
Full Athletic Return	Months 3–4	Months 5–8

Essential Rehabilitation Exercises

Daily home exercises should complement formal physical therapy sessions (which span 20–40 sessions over 3–8 months):

Quadriceps Sets & Straight Leg Raises
Passive and Active Flexion/Extension Exercises
Ankle Pumps (to maintain circulation and prevent DVT)
Wall or Bed Slides (to gradually expand range of motion)

Red Flag Symptoms Requiring Immediate Evaluation

Contact your surgical team immediately if you experience:

Loss of regained range of motion within the first 1–2 weeks (signals early re-stiffness).
Sudden, severe pain during recovery (concerning for iatrogenic fracture).
Signs of infection: fever, excessive wound redness, or purulent drainage.
Persistent calf swelling, warmth, and pain (concerning for DVT).

Frequently Asked Questions About Post-Operative Instructions for Knee Stiffness Surgery

When does physical therapy begin after knee stiffness release surgery?

Physical therapy begins immediately—often on the day of surgery or within 24 hours. Immediate continuous passive motion (CPM) or active-assisted range-of-motion exercises are vital to maintain the mechanical release achieved during surgery and prevent new scar tissue from adhering to raw intra-articular surfaces.

When can I put full weight on my leg after surgery?

Most patients are permitted to bear weight as tolerated immediately following arthroscopic lysis of adhesions. Crutches or a walker are used for comfort and balance during the first few days until full active quadriceps control and normal gait mechanics return.

How should I care for my surgical incisions and dressing?

Keep the initial bulky dressing clean, dry, and intact for the first 48 hours post-op. After 48 hours, you may remove the outer heavy bandages while keeping the small Steri-Strips or dressings over the portal sites intact. Cover portal sites with waterproof band-aids when showering.

How often should I use a Continuous Passive Motion (CPM) machine at home?

If prescribed by your surgeon, the CPM machine is typically utilized for 4 to 8 hours daily (split into 2 to 3 sessions) during the first 2 to 3 weeks post-surgery. The degree of flexion is gradually increased daily according to your rehabilitation protocol.

How should I manage post-operative pain to ensure I can do my exercises?

Adequate pain management is crucial for maintaining range of motion. Take prescribed oral pain medications or NSAIDs 30 to 45 minutes prior to scheduled physical therapy sessions. Regional nerve blocks or continuous infusion pumps may also be utilized during the initial 48 hours to minimize discomfort during early motion exercises.

How often should I apply ice and elevate my knee?

Apply cold packs or an automated cold therapy device for 15 to 20 minutes every 2 hours during the first week, particularly immediately following stretching and therapy sessions. Elevate the leg above heart level using pillows placed under the calf or ankle—never directly behind the knee joint.

When is it safe to shower or submerge my knee in water?

Showering is permitted 48 hours after surgery provided portal sites are covered with waterproof band-aids or plastic wrap. Gently pat the area dry. Do not submerge the knee in a bathtub, hot tub, or pool for at least 2 weeks or until portal incisions are fully healed and cleared by your surgeon.

Why is it critical to avoid placing a pillow directly under the knee while resting?

Placing a pillow directly behind the knee holds the joint in flexion (a slightly bent position), which can cause rapid hamstring tightening and a permanent loss of full knee extension (flexion contracture). Always support the leg under the calf or ankle to keep the knee straight.

When can I safely return to driving and work?

Return-to-activity timelines depend on procedural scope and job demands:

Driving: 1 to 2 weeks, once prescription narcotic pain medications are discontinued and full braking reaction time is restored.
Desk Work: 1 to 2 weeks post-surgery with mobility accommodations.
Manual Labor: 6 to 12 weeks, contingent on quadriceps strength and full range of motion.

What warning signs require immediate contact with my surgeon?