CPM Machines
"machines allow the user to rehabilitate in their home environment"

Continuous Passive Motion (CPM) is a post-operative treatment method that is designed to aid recovery after joint surgery. In most patients after extensive joint surgery, attempts at joint motion cause pain and as a result, the patient fails to move the joint. This allows the tissue around the joint to become stiff and for scar tissue to form resulting in a joint which has limited range of motion and often may take months of physical therapy to recovery that motion.  Passive range of motion means that the joint is moved without the patient's muscles being used.

CPM devices are machines that have been developed for patients to use after surgery. Your physician prescribes how the CPM unit should be used (speed, duration of usage, amount of motion, rate of increase of motion).