How to Prepare for Knee Replacement Surgery: Tests, Medicines, and Home Planning

Knee replacement surgery preparation helps reduce avoidable risks and makes recovery more manageable. Good planning usually includes pre-operative tests, a careful review of medicines, exercises when advised, and practical home arrangements for the first weeks after surgery.

Overview: Why preparation matters

Knee replacement surgery preparation is an important part of treatment, not just a checklist before the operation. It helps the surgical team understand a person’s overall health, lower avoidable risks, and plan for a smoother hospital stay and recovery at home. For many people, the process begins days to weeks before surgery.

The goal is to make sure the knee problem has been fully assessed and that the body is ready for anesthesia, the procedure itself, and rehabilitation afterward. Preparation often includes blood tests, heart or lung assessment when needed, a review of current medicines, and practical steps such as arranging support at home.

People preparing for surgery often feel both hopeful and nervous. That is normal. Clear information about what to expect before, during, and after surgery can make the experience feel more manageable and help patients take an active role in recovery.

Who may need knee replacement and when preparation begins

Knee replacement is usually considered when knee pain, stiffness, and loss of function continue despite non-surgical treatment. Common reasons include advanced osteoarthritis, joint damage from inflammatory arthritis, or previous injury. Many patients have already tried pain management, physical therapy, activity changes, weight management, or injections before surgery is recommended.

Preparation usually begins once the orthopedic surgeon and patient decide that surgery is the best next step. In many cases, this follows an evaluation of long-standing knee osteoarthritis or other causes of severe joint damage. The team may explain whether a total or partial knee replacement is planned and what recovery is likely to involve.

At this stage, patients may be referred for a pre-operative assessment clinic. This visit can include medical review, education about the operation, advice about pain control and walking after surgery, and guidance on preparing the home. If surgery is being planned as part of knee replacement treatment, it is helpful to ask early about timelines, rehabilitation, and any personal risk factors that may need attention first.

Pre-operative tests and medical assessment

Before knee replacement, doctors commonly order tests to check general health and reduce the chance of complications. These may include blood tests to look at blood count, kidney function, blood sugar, and clotting. A urine test may be done in some cases, especially if there are symptoms of infection. Depending on age, medical history, or symptoms, the team may also request a chest X-ray or an electrocardiogram to assess heart rhythm.

The pre-operative appointment is also the time to discuss any long-term conditions such as high blood pressure, heart disease, lung disease, kidney disease, diabetes, or sleep apnea. These conditions do not always prevent surgery, but they may need to be well controlled first. If needed, the surgical team may coordinate with a cardiologist, primary care doctor, or another specialist.

The knee itself may be assessed with imaging, physical examination, and review of symptoms. In some patients, joint replacement planning is informed by orthopedic imaging and alignment evaluation. If the care plan includes MRI scanning or additional imaging, this helps the surgeon better understand the joint and surrounding structures, although not every patient needs the same scans.

People should tell the team about fever, cough, skin infections, dental problems, or any new health issue before surgery. Even a minor illness can sometimes affect the timing of an operation. Prompt communication allows the team to decide whether treatment is needed first or whether surgery should go ahead as planned.

Medicines, supplements, and lifestyle changes before surgery

A careful medicine review is one of the most important parts of knee replacement surgery preparation. Patients should provide a full list of prescription medicines, over-the-counter pain relievers, vitamins, herbal products, and supplements. Some substances can increase bleeding risk, interfere with anesthesia, or affect blood pressure and blood sugar control.

Doctors often give specific instructions about blood thinners, anti-inflammatory pain medicines, diabetes medicines, and certain supplements. These instructions vary from person to person, so patients should never stop or continue a medicine based only on general advice. The safest approach is to follow the surgeon’s, anesthesiologist’s, or prescribing doctor’s plan exactly.

Smoking cessation is strongly encouraged before surgery because smoking can reduce blood flow, slow wound healing, and increase complications. Limiting alcohol may also be advised, particularly if alcohol use is heavy or frequent. Good nutrition matters as well. Eating balanced meals with enough protein, staying hydrated, and addressing low iron or poor blood sugar control when present can support recovery.

If pain from the knee has led to low activity, some patients benefit from gentle strengthening and flexibility work before surgery. This is sometimes called prehabilitation. A doctor or physical therapist may recommend simple exercises to improve thigh strength, balance, and mobility, or discuss a broader physical therapy and rehabilitation plan that continues after the operation.

Planning the home and daily life after surgery

Home preparation can make the first days and weeks after surgery safer and less stressful. Many people will use a walker, crutches, or a cane for a period of time, so it helps to create clear walking paths, remove loose rugs, secure electrical cords, and improve lighting. Frequently used items should be placed within easy reach to avoid unnecessary bending or climbing.

A sleeping area on the main floor may be helpful if stairs are difficult at first, although some people can safely manage stairs with guidance. A stable chair with arms, a raised toilet seat, and grab bars in the bathroom may make transfers easier. Shower safety is especially important; a non-slip mat and a shower chair can be useful for some patients.

It is also wise to plan daily support in advance. Patients may need help with transport, meals, shopping, wound care reminders, and early exercises. If someone lives alone, arranging a family member, friend, or caregiver for the first several days can be very helpful. Preparing meals ahead of time and filling essential prescriptions before surgery may reduce stress after returning home.

Work and driving plans should also be discussed before the operation. Return to these activities depends on the side of surgery, recovery progress, pain control, and the surgeon’s advice. Setting realistic expectations in advance can help patients focus on healing rather than rushing recovery.

The day before and the day of surgery

Shortly before surgery, the hospital team usually provides written instructions about eating, drinking, bathing, and arrival time. Patients are often asked not to eat for a certain period before anesthesia, though guidance about clear fluids can vary. It is important to follow these instructions exactly because they affect safety during anesthesia.

Many hospitals advise showering with a special soap before surgery to lower the risk of infection. Patients should wear comfortable clothing and avoid bringing valuables. It is useful to pack identification, a current medicine list, insurance or hospital documents, and any mobility aids the team has asked the patient to bring.

On the day of surgery, the team reviews the consent, confirms the planned procedure, checks the surgical site, and answers last-minute questions. An anesthesiologist discusses the anesthesia plan, which may include general anesthesia, regional anesthesia, or both. Some patients also learn about pain control methods that begin during or immediately after the operation.

Because every hospital has its own process, patients should ask in advance what to expect after surgery, including when they may stand, walk, eat, and start exercises. Knowing these steps ahead of time can reduce anxiety and make the first recovery milestones feel more predictable.

Early recovery and rehabilitation planning

Recovery planning should begin before surgery, not after it. Most patients start moving the knee and walking with assistance relatively soon after the operation, depending on the surgeon’s and rehabilitation team’s guidance. Early movement can support circulation, reduce stiffness, and build confidence.

Pain management is also part of preparation. Patients should ask how pain will be treated in the hospital and at home, what side effects to watch for, and when to contact the care team. Ice, elevation, gentle movement, and prescribed medicines are commonly used together, but the exact plan differs between individuals.

Physical therapy is often a major part of knee replacement recovery. Exercises may focus on knee bending and straightening, quadriceps strength, walking pattern, and balance. For some people, recovery overlaps with care for related musculoskeletal issues such as meniscus tears or long-standing movement limitations that affected mobility before surgery.

If more complex joint or alignment issues are present, the orthopedic team may tailor follow-up and rehabilitation accordingly. In some treatment pathways, broader orthopedic planning may involve services related to orthopedics and traumatology, especially when arthritis, deformity, or previous injury has affected function for a long time.

When to contact the doctor before surgery

Patients should contact their doctor promptly if anything changes in the days or weeks before the operation. This includes fever, cough, shortness of breath, chest pain, vomiting, diarrhea, rash, skin wounds near the knee, or signs of infection such as burning with urination or dental pain. Even if symptoms seem mild, they can be important before anesthesia and surgery.

It is also important to speak up about medicine changes, especially if another doctor starts a new prescription or advises stopping one. Any recent hospital stay, emergency visit, or change in blood pressure, blood sugar, or heart symptoms should be reported. Clear communication helps the team decide whether surgery can proceed safely.

Patients who feel uncertain should not hesitate to ask questions about tests, fasting, exercise, travel, or recovery expectations. Well-informed patients are often better prepared emotionally and practically. Near the end of the preparation process, some international patients may choose care at Acibadem International, where multidisciplinary specialists in JCI-accredited hospitals diagnose and treat knee conditions and support surgical planning for patients traveling from abroad.

Frequently asked questions

How long before knee replacement surgery should preparation begin?

Preparation often begins several weeks before surgery, although the exact timeline varies. This period allows time for medical tests, medicine review, home planning, and questions about recovery.

What tests are usually done before knee replacement surgery?

Common pre-operative tests include blood tests and, in some patients, urine testing, a chest X-ray, or an electrocardiogram. The aim is to confirm that the person is ready for anesthesia and to identify any health issues that need attention first.

Do patients need to stop their medicines before knee replacement?

Some medicines and supplements may need to be stopped or adjusted before surgery, especially blood thinners, certain pain relievers, and some diabetes medicines. Patients should only make changes under the guidance of their surgeon, anesthesiologist, or regular doctor.

How should a home be prepared after knee replacement surgery?

It helps to remove tripping hazards, create clear walking space, and place essentials within easy reach. Many patients also benefit from a stable chair, bathroom safety equipment, prepared meals, and help from a family member or friend during the first days.

Can exercise help before knee replacement surgery?

Yes, when recommended by a doctor or physical therapist, gentle exercise before surgery may improve strength and mobility. The right plan depends on pain levels, current function, and other medical conditions.

What should patients tell their doctor before surgery?

Patients should report any new illness, fever, infection, dental problem, skin wound, breathing issue, or change in medicines. They should also mention any recent hospital visit or change in long-term conditions such as diabetes or heart disease.

References

• American Academy of Orthopaedic Surgeons
• National Institute for Health and Care Excellence
• Centers for Disease Control and Prevention
• National Health Service
• Arthritis Foundation

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.