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What to Expect Before, During, and After Knee Replacement Surgery

Complete timeline of knee replacement surgery — from your first consultation to full recovery. What happens at every stage, explained clearly for patients.

Before Surgery: Consultation and Planning

  • Review your symptoms and medical history
  • Examine your knee (range of motion, stability, alignment)
  • Order X-rays (standing, to show bone-on-bone contact)
  • Possibly order an MRI (to assess soft tissue)
  • Discuss all treatment options — not just surgery

If surgery is recommended, you'll schedule a pre-operative visit 2-4 weeks before surgery for blood work, EKG, medical clearance, and surgical planning. If your surgeon uses robotic technology, a CT scan maps your knee in 3D.

Pre-Surgery Preparation (2-4 Weeks Before)

  • Stop blood thinners as directed
  • Manage blood sugar if diabetic (A1C below 7.0 reduces infection risk)
  • Stop smoking (improves healing by 40-60%)
  • Treat dental infections (bacteria can travel to the new joint)
  • Set up a recovery area on the main floor
  • Install grab bars in the bathroom
  • Remove trip hazards (rugs, cords)
  • Stock easy-to-prepare meals
  • Arrange help for the first 1-2 weeks
  • Start physical therapy BEFORE surgery — patients who "pre-hab" recover faster
  • Focus on quad strengthening, straight-leg raises, and range of motion
  • Stronger muscles before surgery = faster recovery after

Day of Surgery

Arrival: 2 hours before surgery for check-in, gown change, IV placement, and anesthesia consultation.

Anesthesia: Most knee replacements use spinal anesthesia (numbs below the waist) with sedation, or general anesthesia (fully asleep). Your anesthesiologist will recommend the safest option.

The procedure: Takes 1-2 hours. The surgeon removes damaged cartilage and bone, then implants metal and plastic components. The new joint is tested for alignment, stability, and range of motion before closing.

Immediately after: You'll wake in the recovery room. A nerve block keeps your leg numb and pain-free for 12-24 hours. Physical therapy often begins the same day — standing and taking a few steps with a walker.

Recovery Week by Week

Week 1: Ice, elevation, gentle exercises. Walker or crutches for all movement. Pain managed with medication (many surgeons now use multimodal protocols that minimize opioid use). Physical therapy visits begin.

Weeks 2-3: Increased walking distance. Transition from walker to cane for some patients. Driving resumes for left knee (automatic transmission) around week 2-3. Staples/sutures removed at 2-week follow-up.

Weeks 4-6: Most patients walking without a cane at home. Driving resumes for right knee. Return to desk work. Swelling and stiffness gradually improving.

Months 2-3: Range of motion approaching normal. Walking 30+ minutes. Swimming and stationary bike. Most daily activities resumed.

Months 3-6: Continued strengthening. Low-impact activities (golf, cycling, hiking). Maximum improvement in range of motion.

Months 6-12: Final 10% of recovery. Most patients report feeling "normal" by 6-12 months. Full benefit of surgery realized.

What Results to Expect

Pain relief: Over 90% of patients report significant pain relief. Most describe the remaining discomfort as "different" than arthritis pain — and much more manageable.

Range of motion: Most patients achieve 0-120 degrees (full extension to deep bend). This is enough for all daily activities, walking, cycling, and most recreational sports.

Activities you CAN do: Walking, swimming, cycling, golf, doubles tennis, hiking, dancing, gardening, travel.

Activities to AVOID: Running, jumping, basketball, soccer, skiing moguls, heavy squatting. High-impact activities accelerate implant wear.

Implant lifespan: Modern implants last 20-25 years with normal use. Over 90% of implants are still functioning well at 15 years.

Frequently Asked Questions

How long is the hospital stay for knee replacement?
Most patients stay 0-2 nights. Same-day (outpatient) knee replacement is increasingly common for healthy patients. Traditional hospital stays have shortened from 5+ days to 1-2 days.
When can I drive after knee replacement?
Left knee with automatic transmission: 2-3 weeks. Right knee: 4-6 weeks. You must be off opioid pain medications and able to perform an emergency stop safely.
How painful is knee replacement recovery?
Modern pain management protocols have dramatically improved the experience. Most patients describe the first week as uncomfortable but manageable. Many never need opioid medications — just acetaminophen and ice.
Will I need physical therapy?
Yes. Physical therapy is essential for a good outcome. Most patients attend PT 2-3 times per week for 6-12 weeks, then continue home exercises. Patients who commit to PT have better outcomes.
Can I kneel after knee replacement?
Most patients can kneel eventually, though it may feel uncomfortable on the replaced knee. Using a cushion or kneeling pad helps. About 60-70% of patients report being able to kneel without significant pain.

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