Free Guide to Preparing For Knee Replacement Surgery

Understanding Knee Replacement Surgery and When It May Be Recommended

Knee replacement surgery, also called knee arthroplasty, is a procedure where a surgeon removes damaged portions of your knee joint and replaces them with artificial parts made of metal and plastic. According to the American Academy of Orthopaedic Surgeons, approximately 1 million knee replacement surgeries are performed each year in the United States. The procedure typically takes between 1 to 2 hours, though preparation and recovery time in the surgical facility can extend this significantly.

Surgeons generally consider knee replacement when a person has severe knee damage that causes pain, swelling, and difficulty moving. Common reasons for the procedure include osteoarthritis, rheumatoid arthritis, post-traumatic arthritis from previous injury, and knee cartilage damage that has not responded to other treatments. The decision to move forward with surgery involves careful consideration between you and your orthopedic surgeon about your specific situation, overall health, and functional goals.

Before surgery is recommended, most patients go through months or years of non-surgical treatments. These may include physical therapy, weight management, anti-inflammatory medications, corticosteroid injections, or other interventions. Your surgeon will review imaging studies, typically X-rays or MRI scans, to assess the extent of damage. They will also discuss your medical history, current medications, and any conditions like heart disease or diabetes that could affect surgery and recovery.

Research from the Journal of the American Medical Association shows that knee replacement provides significant relief for about 85 to 90 percent of patients who undergo the procedure. Most people report reduced pain and improved ability to walk, climb stairs, and participate in daily activities. However, results vary based on factors including age, overall health, weight, and commitment to rehabilitation after surgery.

Practical takeaway: Schedule a consultation with an orthopedic surgeon if you have chronic knee pain that limits your activities. Come prepared with information about your symptoms, how long you've had them, what treatments you've tried, and what daily activities are most affected. This conversation will help you and your surgeon determine whether knee replacement may be right for your situation.

Medical Tests and Evaluations Required Before Surgery

Before knee replacement surgery, your surgical team will order several medical tests to assess your overall health and identify any risks. These tests ensure your body can safely tolerate anesthesia and the surgical procedure itself. The specific tests ordered depend on your age, medical history, and any existing health conditions. Most patients undergo blood work that measures red blood cell and white blood cell counts, blood clotting ability, kidney function, and liver function. These tests typically cost between $100 and $500 depending on your location and insurance coverage.

An electrocardiogram, or EKG, is a common test that records the electrical activity of your heart. This test usually takes about 10 minutes and helps surgeons understand whether your heart can handle the stress of surgery. If you're over age 50 or have a history of heart problems, your surgeon may also order a chest X-ray to check your lungs and heart size. These imaging tests can reveal problems that weren't previously known, sometimes changing the surgical timeline or requiring additional evaluation by a cardiologist.

Your surgeon will also need to know your blood type and whether you have any infections. Tests for infections may include screening for MRSA (methicillin-resistant Staphylococcus aureus), hepatitis, and HIV, depending on your medical history and risk factors. A urinalysis checks for urinary tract infections, which should be treated before surgery. According to the American College of Surgeons, these screening tests can prevent serious complications during and after surgery.

Dental evaluation is sometimes recommended before surgery. If you have dental problems or infections, bacteria can enter your bloodstream during surgery and cause serious infections in your new knee joint. Your dentist should perform any necessary cleanings or treatments before your surgery date. Similarly, your primary care physician should review all your current medications and may adjust dosages or recommend stopping certain medications before surgery.

Practical takeaway: Request a written list of all required tests from your surgeon's office at least 6 weeks before your scheduled surgery. Schedule tests early so results are available for your pre-surgery appointment. Bring all test results to your pre-operative visit, and ask your surgeon to explain any abnormal findings and what they mean for your surgical plan.

Preparing Your Home and Daily Life for Recovery

Recovery from knee replacement surgery requires significant changes to your home environment and daily routines. Most patients spend 1 to 3 nights in the hospital after surgery, then require 6 to 12 weeks of recovery at home before returning to most normal activities. Planning your home setup before surgery makes the recovery period safer and more manageable. The most important preparation is identifying a safe recovery space—ideally a bedroom on the first floor of your home so you don't need to navigate stairs during the first weeks after surgery when mobility is limited.

You'll need to arrange your bedroom and bathroom for easy access. Install grab bars near your toilet and in your shower or tub—these typically cost $20 to $100 per bar and can be purchased at hardware stores. Place your bed at a height that makes it easy to sit down and stand up; if your bed is too low, you can raise it with bed risers. Stock your bedroom and recovery area with items you'll need within arm's reach: water bottles, medications, remote controls, phone chargers, books, tablets, and entertainment. During the first 2 to 3 weeks after surgery, you may have difficulty walking and carrying objects, so bringing everything you need to one location saves energy and prevents falls.

Arrange for help during recovery. Most people cannot drive for 4 to 6 weeks after surgery, and even then cannot drive if they're taking pain medications. You'll need someone to help with cooking, cleaning, laundry, and errands. According to a survey by the American Academy of Orthopaedic Surgeons, patients who have consistent caregiver support during the first 2 weeks after surgery have fewer complications and return to activities faster. If family cannot provide this support, consider hiring a home health aide for at least the first week or two after surgery.

Remove hazards from your home that could cause falls. Secure loose rugs with tape or remove them entirely. Clear pathways of clutter, electrical cords, and furniture. Improve lighting in hallways, bedrooms, and bathrooms. If your home has stairs, practice using crutches or a walker on stairs before surgery so you know what to expect. Some patients find that a temporary bed on the first floor eliminates the need to navigate stairs for several weeks.

Practical takeaway: Walk through your home 4 to 6 weeks before surgery and identify the room where you'll spend most recovery time. Make a list of modifications needed, such as grab bars or furniture rearrangement, and complete these changes well before your surgery date. Arrange caregiver coverage and confirm these plans at least 3 weeks before surgery.

Managing Pain and Medications Before and After Surgery

Pain management is a critical part of successful knee replacement recovery. Before surgery, your surgeon and anesthesiologist will discuss pain control strategies and develop a plan tailored to your needs. Many patients take pain medications before surgery—typically over-the-counter options like acetaminophen or ibuprofen, or prescription medications if pain is severe. Your surgical team may ask you to stop taking certain medications, such as blood thinners or aspirin, several days before surgery because these can increase bleeding during the procedure.

After surgery, you'll receive pain medications in the hospital, typically through an IV (intravenous line) or as injections. Common post-operative pain medications include opioids like morphine or oxycodone, which are very effective for severe pain but can cause side effects like constipation, drowsiness, and nausea. According to the American Society of Anesthesiologists, most patients experience significant pain for the first 1 to 2 weeks after knee surgery, then gradual improvement over the following weeks. Your pain level should decrease noticeably each week if recovery is progressing normally.

Many surgeons now recommend a multimodal pain management approach, which combines different types of pain relief to reduce the need for high doses of any single medication. This approach may include regional anesthesia (numbing the knee area), acetaminophen, nonsteroidal anti-inflammatory drugs like ibuprofen, and opioids used only when other methods aren't sufficient. Ice application and elevation also significantly reduce pain and swelling. Applying ice for 15 to 20 minutes several times daily, especially after