How to prepare for knee surgery: checklist & diet

Knee surgery, whether it's an arthroscopy, ligament reconstruction, or a total knee replacement, works best when you walk into the operating room prepared. I've performed hundreds of knee procedures at KDSG Superspeciality Hospitals in Noida, and the patients who recover fastest are almost always the ones who prepared well in the weeks before surgery.

Preparation isn't just about packing a hospital bag. It's about getting your body, home, and mind ready for what comes after. The surgery itself takes 1-3 hours. Recovery takes weeks to months. What you do before surgery directly shapes how that recovery goes.

This is the same checklist and dietary guidance I give my patients during their pre-surgical consultation.

Why pre-Surgery preparation matters

Patients often focus entirely on choosing the right surgeon and the right hospital. Those matter, absolutely. But I've seen well-performed surgeries produce slow recoveries because the patient's body wasn't ready, their home wasn't set up for post-operative limitations, or their nutrition was poor going into the procedure.

Proper preparation:

• Reduces surgical risk — optimized blood sugar, blood pressure, and hemoglobin levels mean fewer complications during and after the operation
• Speeds recovery, stronger muscles around the knee before surgery means faster rehabilitation afterward
• Lowers infection risk, good nutrition and hygiene practices reduce post-surgical infection rates
• Reduces anxiety — knowing what to expect and having a plan removes much of the fear surrounding surgery

Pre-Surgery medical checklist

4-6 weeks before surgery

Get all required tests done. Your surgeon will order pre-operative blood work including:

• Complete blood count (CBC), checks hemoglobin levels and rules out anemia
• Blood sugar (fasting and post-prandial), uncontrolled diabetes significantly slows wound healing and increases infection risk
• Kidney function tests (creatinine, BUN) — ensures your kidneys can handle anesthesia and post-operative medications
• Coagulation profile (PT/INR), checks how well your blood clots
• ECG and chest X-ray, clears you from a cardiac and pulmonary standpoint
• Urine routine — rules out urinary tract infections that could spread post-surgery

If you're over 50 or have heart conditions, the anesthesiologist may request an echocardiogram or stress test.

Review your medications with your surgeon. Certain drugs must be stopped before surgery:

• Blood thinners (warfarin, clopidogrel, aspirin), typically stopped 5-7 days before surgery to reduce bleeding risk. Your surgeon will give specific instructions based on your cardiac history
• Anti-inflammatory drugs (ibuprofen, diclofenac), stop at least 3-5 days before
• Herbal supplements (ginkgo, garlic pills, fish oil) — these can affect blood clotting. Stop 2 weeks before
• Diabetes medications, dosing may need adjustment. Metformin is sometimes paused 24-48 hours before. Insulin doses may be modified on the day of surgery

Never stop or adjust medications without discussing it with your surgeon or anesthesiologist first.

Dental checkup. This sounds unrelated, but active dental infections can seed bacteria into the bloodstream, which can then settle on a new knee implant. If you need dental work, get it done at least 2 weeks before knee surgery.

2-3 weeks before surgery

Start pre-habilitation exercises. Pre-hab is physiotherapy done before surgery, and it makes a measurable difference in outcomes. Stronger quadriceps and hamstrings before surgery mean:

• Better control of the knee joint immediately after the procedure
• Faster return to walking
• Less post-operative pain

Key exercises (do these daily, 2-3 sets of 10-15 reps):

• Straight leg raises, lying flat, tighten the thigh and lift the entire leg 6-8 inches off the bed. Hold 5 seconds. This strengthens the quadriceps without bending the knee
• Quad sets — lying flat, push the back of the knee into the mattress by tightening the thigh muscle. Hold 5-10 seconds
• Ankle pumps, flex and point your foot repeatedly. Improves circulation and prevents blood clots post-surgery
• Seated knee extensions, sit in a chair, slowly straighten the knee, hold 3 seconds, lower slowly
• Calf raises — standing, rise onto your toes and lower slowly

If these exercises cause sharp pain in the knee, reduce the range of motion or consult your physiotherapist for modifications.

Arrange your post-surgery support system. You'll need help for the first 1-2 weeks after surgery:

• Someone to drive you home from the hospital
• Someone to assist with bathing, cooking, and household tasks for the first week
• Someone to accompany you to follow-up appointments

If you live alone, consider arranging for a family member to stay with you or hiring a home attendant for the first 10-14 days.

1 week before surgery

Set up your home for recovery. This is where most patients under-prepare:

• Move your sleeping arrangement to the ground floor if your bedroom is upstairs. Stairs will be very difficult for the first 2-4 weeks
• Remove tripping hazards, loose rugs, electrical cords on the floor, cluttered walkways
• Install grab bars near the toilet and in the shower if possible. A simple handrail can prevent a dangerous fall
• Get a raised toilet seat, standard toilet height is too low after knee surgery. A raised seat (available at medical supply stores) reduces the knee bend required
• Place frequently used items at waist height — phone charger, water bottle, medications, remote controls, books. You don't want to bend down or reach up for essentials
• Stock up on groceries and medications, you won't be going to the market for a while
• Keep a walker or crutches ready, your surgeon will specify which you'll need. Practice using them before surgery so you're not learning while also managing post-operative pain

Practice crutch or walker walking. Sounds trivial, but coordinating crutches or a walker while protecting your surgical knee takes practice. Ask your physiotherapist to teach you before the procedure.

Prepare a recovery bag for the hospital. Pack:

• Loose, comfortable clothing (shorts or pants with wide legs that fit over a bandaged knee)
• Slip-on footwear (no laces — you won't be able to bend down easily)
• Toiletries
• Phone charger
• Any prescribed medications
• Insurance documents and ID

The night before and morning of surgery

• Nothing to eat or drink after midnight (or as instructed by your anesthesiologist). This is a strict rule, food in the stomach during anesthesia can cause aspiration, a potentially fatal complication
• Shower with antiseptic soap (like chlorhexidine) the night before and morning of surgery. This reduces skin bacteria and lowers surgical site infection risk
• Do not shave your knee area, hospital staff will prepare the skin with proper technique if needed. Home shaving creates micro-cuts that harbor bacteria
• Wear loose clothing to the hospital
• Leave jewelry and valuables at home
• Take only the medications your surgeon has approved on the morning of surgery, with a small sip of water

Diet before knee surgery

What you eat in the 3-4 weeks before surgery directly affects your body's ability to heal afterward. I've seen patients with poor nutritional status take twice as long to recover compared to those who ate well pre-operatively.

Protein: The building block of recovery

Your body needs protein to repair surgical wounds, rebuild muscle, and fight infection. Aim for 1.2-1.5 grams of protein per kilogram of body weight daily in the weeks leading up to surgery.

Good sources:

• Eggs — 2 whole eggs provide about 12-14 grams of protein. Easily digestible. Include the yolk, it contains vitamin D and iron
• Dal and legumes, rajma, chana, moong, masoor. A bowl of dal provides 12-15 grams of protein
• Paneer — 100 grams provides about 18 grams of protein
• Chicken and fish, 100 grams of chicken breast has about 25 grams of protein. Fish adds omega-3 fatty acids that reduce inflammation
• Curd/yogurt, provides protein plus probiotics for gut health, which affects immune function
• Milk — 2 glasses daily provides calcium and protein together
• Soy products, tofu, soy milk, soy chunks for vegetarians needing extra protein

Calcium and vitamin D: For bone healing

Knee surgery, especially joint replacement — involves bone. Adequate calcium and vitamin D are non-negotiable.

• Calcium target: 1000-1200 mg per day
• Vitamin D target: Your surgeon may check your vitamin D levels and prescribe supplements if low (very common in Indian patients, I find deficiency in nearly 70-80% of my pre-surgical patients)
• Food sources of calcium: Milk, curd, cheese, ragi, sesame seeds (til), green leafy vegetables (except spinach, which has oxalates that block calcium absorption)

If your vitamin D level is below 30 ng/mL, your surgeon will likely start you on a weekly or monthly high-dose supplement (60,000 IU sachets) well before surgery.

Iron: prevent anemia

Surgery involves some blood loss. Going into surgery with low hemoglobin is risky.

• Target hemoglobin: At least 11-12 g/dL before surgery
• Iron-rich foods: Beetroot, pomegranate, dates, jaggery, green leafy vegetables, red meat, organ meats
• Vitamin C with iron: Eat iron-rich foods with lemon juice, orange, or amla, vitamin C dramatically improves iron absorption

If you're anemic, your surgeon may prescribe iron supplements or, in severe cases, arrange an iron infusion or blood transfusion before surgery.

Anti-Inflammatory foods

Reducing inflammation before surgery gives your body a head start on healing:

• Turmeric (haldi) — contains curcumin, a natural anti-inflammatory. Add it to warm milk or food
• Ginger, reduces inflammation and helps with post-surgical nausea
• Omega-3 rich foods, walnuts, flaxseeds, fatty fish (salmon, sardines)
• Berries and colorful fruits — rich in antioxidants that support tissue repair

Foods to avoid before surgery

• Alcohol, stop at least 2 weeks before surgery. Alcohol thins the blood and impairs wound healing
• Excess sugar and processed foods, spike blood sugar and promote inflammation
• Excessive salt — causes fluid retention and can raise blood pressure
• Fried and heavy foods, difficult to digest and can cause nausea with anesthesia

Hydration

Drink 2-3 liters of water daily (until the midnight cutoff before surgery day). Well-hydrated tissues heal better. Dehydrated patients have harder veins for IV access, thicker blood more prone to clotting, and slower wound healing.

What to expect immediately after surgery

Knowing what comes next reduces anxiety enormously. Here's the typical timeline:

• Day 0 (Surgery day): You'll wake up in the recovery room with your knee bandaged and possibly in a brace. Pain will be managed with IV medications. You may feel groggy from anesthesia. Ankle pump exercises start the same day
• Day 1: The physiotherapist will help you sit up and possibly stand with a walker. Early mobilization is critical, it prevents blood clots and starts the recovery process
• Days 2-3: Short walks with a walker in the hospital corridor. Knee bending exercises begin (gentle, assisted)
• Day 3-5: Most patients are discharged. You'll go home with pain medications, blood thinners (to prevent clots), antibiotics, and a physiotherapy plan
• Weeks 1-2 at home: Walker-assisted walking. Physiotherapy exercises 2-3 times daily. Ice application to control swelling. Wound dressing changes as instructed
• Weeks 3-6: Transition from walker to cane. Increasing knee bend range. Pain decreases significantly
• Weeks 6-12: Most patients return to desk work and light daily activities. Physiotherapy continues
• 3-6 months: Full recovery for most procedures. Knee replacement patients may take up to 6 months to feel completely normal

Red flags after surgery: when to call your surgeon

Contact your surgeon immediately if you experience:

• Fever above 101°F (38.3°C) — may indicate infection
• Increasing redness, warmth, or pus around the surgical wound, signs of wound infection
• Sudden severe calf pain or swelling, could be a deep vein thrombosis (blood clot), a serious complication
• Chest pain or difficulty breathing — rare but potentially indicates a pulmonary embolism. Go to the ER immediately
• Sudden increase in knee pain that's not controlled by prescribed medications, may indicate a complication
• Numbness or tingling in the foot that doesn't resolve, possible nerve issue

Final checklist summary

4-6 weeks before: Blood tests, medication review, dental checkup, start pre-hab exercises

2-3 weeks before: Optimize diet (protein, calcium, iron), arrange support system, continue pre-hab

1 week before: Set up home, practice with walker/crutches, pack hospital bag, stock groceries

Night before: Stop eating/drinking at midnight, antiseptic shower, lay out loose clothing

Morning of: Antiseptic shower, take only approved medications, arrive at hospital on time

Preparation takes effort, but it pays off in a smoother surgery, faster recovery, and fewer complications. If you have questions about preparing for knee surgery, or if you're considering a procedure and want to understand your options, consult with an orthopedic specialist who can guide you through every step.

At KDSG Superspeciality Hospitals in Noida, my team and I provide a complete pre-surgical counseling session covering all of these points — personalized to your specific procedure and medical history.

Frequently asked questions

How long before knee surgery should I start preparing?

Ideally, 4-6 weeks. This gives enough time for pre-hab exercises to strengthen your muscles, dietary changes to improve your nutritional status, and medical optimization (blood sugar control, hemoglobin improvement) to take effect.

Can I take my regular medications on the morning of surgery?

Only the medications your surgeon or anesthesiologist has specifically approved. Blood pressure and thyroid medications are usually continued. Blood thinners and diabetes medications are typically held. Always confirm with your surgical team.

Is a total knee replacement very painful?

Modern pain management protocols have made knee replacement significantly more tolerable than it was a decade ago. You'll have pain, that's unavoidable after major surgery, but it's well-controlled with a combination of medications, nerve blocks, and ice therapy. Most patients describe the pain as "manageable" by day 3-4.

How long will I be in the hospital after knee surgery?

For arthroscopy: usually same-day discharge or 1 night. For ACL reconstruction: 1-2 nights. For total knee replacement: 3-5 nights at most facilities. Early discharge is safe and preferred when pain is controlled and you can walk with a walker.

What should I eat after knee surgery?

Continue the high-protein, calcium-rich diet described above. Post-surgery, your body's protein needs actually increase. Add fiber (fruits, vegetables, whole grains) because pain medications can cause constipation — a very common and underappreciated post-surgical complaint.