The recovery and rehabilitation process plays a crucial role in helping you get back on your feet and resume an active lifestyle. It can help you heal from surgery faster and greatly improve your chances for long-term success. It’s important that you commit to a plan and push yourself to do as much as possible each day. Here’s what you can expect during the post-knee replacement recovery and rehab period, which usually lasts about 12 weeks:
Rehabilitation begins almost immediately after your wake up from surgery. Within the first 24 hours you will begin standing and walking using an assistive device—with the help of a physical therapist (PT). In fact, it’s critical to get up and use your artificial knee as soon as possible.
Expect the PT to provide exercises that will help strengthen your muscles and guide you through them every day. Your PT will also demonstrate how to get in and out of your bed and move around with the aid of an assistive device, such as a walker, crutches, or a cane. He or she may ask you to sit at the side of the bed, walk a few steps, and transfer yourself to a bedside commode. The PT will also discuss your home environment and help you get set up with a continuous passive motion (CPM) machine for use in the hospital room and possibly at home. Some patients leave the operating room with their leg already in a CPM machine. This depends on the surgeon and the hospital. The machine keeps your knee in motion—with the goal of preventing the buildup of scar tissue and stiffness that can result from being immobile. A nurse or occupational therapist will help you with tasks such as changing the bandage, dressing, bathing and using the toilet.
Your PT may ask you to walk for brief periods using an assistive device. He or she may also request that you use a regular toilet rather than a bedpan and attempt to climb a few steps at a time. You may be asked to continue using the CPM machine. As you recover from surgery your activity level should increase.
Day 3 Until Discharge
By now your knee should be getting stronger and you should be able to increase your exercise and activity level. Your doctor will be shifting you from pharmaceutical strength painkillers tolower dose pain medication. Your PT may ask you to go on longer walks outside your hospital room, climb up and down a flight of stairs, move onto a chair or a toilet without assistance, and reduce the use of a walker, crutches or a cane. At discharge you should be able to bend your knee well, preferably to a minimum of a 90-degree angle; dress and bathe on your own; and minimally rely on an assistive device.
Goals by discharge:
- Get in and out of bed and perform transfers with the least amount of help possible using appropriate assistive devices.
- Walk at least 25 feet and go up and down stairs using a walker or crutches.
- Achieve 90 degrees of range within the knee in order to perform sit to stand transfers.
- Display an understanding of suggested exercise and activity.
Discharge Through Week 3
By the time you’re back home or in a rehab facility, you should be able to move around more freely—while experiencing reduced pain. You’re likely to rely less and less on an assistive device. For example, if you required a walker at the hospital you will probably be able to get by on crutches or a cane now. You should be engaged in a daily regimen of exercise as prescribed by your physical therapist. Bathing and dressing should be easier and you may be able to go outside for longer walks. You will require fewer and less powerful pain meds. Your doctor may ask you to continue using a CPM machine during this period.
Weeks 4 through 6
If you’ve stayed on your exercise and rehab schedule you should notice a dramatic improvement in your knee. It should display improved flexion and strength. Your PT may ask you to go on longer walks and wean yourself from an assistive device. Toward the end of this period, you may be able to go for longer walks—perhaps a half mile or farther. Ideally, you will feel as though you’re regaining your independence. Activities such as cooking, cleaning, and other household chores should be much easier to perform. You should consult with your PT and surgeon to determine when you will be able to return to work and regular activities. Some TKR recipients resume driving within 4-6 weeks of surgery—but don’t just go for it. Talk it through with your surgeon before you get behind the wheel. If you are taking narcotic medications or don’t feel confident driving, it’s wise to wait a bit longer.
Goals By Week 6:
- Increase the strength of your knee by continuing your exercise regimen and walking.
- Experience decreased swelling and inflammation.
- Return to everyday activities.
- Achieve improved range of motion, preferably at least 90 degrees of flexion required for normal walking and climbing stairs.
Weeks 7 Through 11
At this point you should be well on the road to recovery. You may be able to walk a couple of blocks without any type of assistive device and engage in other basic activities that require physical exertion, including driving, housekeeping, and shopping. Your PT will be monitoring your exercises and perhaps modifying them as your knee improves and you’re able to move it more freely. These might include:
- Toe and heel raises, which involve alternating between rising up on your toes and heels while in a standing position.
- Partial knee bends that require you to bend your knees and move upward and downward while standing.
- Hip abductions, which require you to move your leg to one side while standing.
- Leg balances that involve standing on one foot at a time for as long as possible.
- Step-ups that involve raising alternating feet up and down on a single step.
- Bicycling on a stationary bike.
This period is crucial for long-term success. Your commitment to a exercise and rehab plan will play a key role in determining how quickly you return to a normal lifestyle and how effectively your knee works in the future.
Goals by Week 11:
- Improved range of motion, possibly to 115 degrees.
- Rapidly improving mobility and dramatically less stiffness and pain.
- Improved strength in the knee and the surrounding area.
- Return to most everyday activities, including recreational walking, swimming and bicycling.
If you’ve been diligent and committed to rehab, it’s likely that you are up and about—and beginning to enjoy activities such as walking, swimming, golf, dancing, and bicycling. It’s important to continue with the exercises prescribed by your PT and avoid the temptation to engage in high impact activities such as running, aerobics, skiing, basketball, football, and high intensity cycling, which could damage your implant or cause damage to surrounding tissue. At this point you should be experiencing a dramatic decrease in pain. It’s critical to stay in touch with your medical team throughout this period and begin activities only after receiving clearance from them.
Week 13 and Beyond
You should notice gradual and continuing improvement in your knee during this period. As time goes on, pain should subside and, in most cases, after a year you should feel at or near 100 percent. However, it’s important to stay in touch with your medical team and have periodical check-ups to ensure that the knee is continuing to work properly. If at any point you feel pain, swelling, stiffness, or unusual movement in your knee, do not delay checking in with your surgeon.
Of course, every person is different and recovery periods can vary, depending on a number of factors. A typical full recovery from a total knee replacement is three to 12 months. However, know that the harder you work rehabbing, the more likely you are to enjoy a faster and fuller recovery.
Goals by Week 13:
- Achieve 115 degrees of flexion so that it’s possible to engage in a wide range of everyday activities.
- Be almost entirely pain free.