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A guideline to the rehabilitation process for knee replacement surgery:

Pre-rehabilitation may be helpful before surgery to improve strength and flexibility of the knee.

After Surgery
Following surgery, the rehabilitation process starts as soon as you recover from the anaesthetic. 

When sensation and motor function return, you will be encouraged to carry out simple exercises including ankle pumps and leg lifts.

You will be encouraged to do heel slides while sitting on a chair and to walk on the same day or day after surgery. 

You will be expected to stay in hospital for 1 to 3 days. If you make good progress, you could be discharged from hospital on the same day.

When you are discharged from hospital, you will be given painkillers and medication to reduce the risk of developing blood clots. The wound on your knee should be protected with a dressing and kept dry for approximately 2 weeks.

You will need to do exercises following discharge from hospital. It is important that you are able to achieve a good range of movement and strength in the knee. Your aim, at the very least, should be to straighten you knee fully and bend it to at least 90 degrees. Physiotherapy will help you achieve this or better.

You may be able to drive within 4 to 6 weeks of surgery, provided the knee is comfortable and you can bend the knee, and have enough strength to control your vehicle. You must be safe.