<unk>  <unk>  devices are used during the first phase of rehabilitation following a soft tissue surgical procedure or trauma. The goals of phase 1 rehabilitation are: control post-operative pain, reduce inflammation, provide<unk><unk>  in a specific plane of movement, and protect the healing repair or tissue.<unk>  is carried out by a<unk>  device, which constantly moves the joint through a controlled range of<unk> ; the exact range is dependent upon the joint, but in most cases the range of<unk>  is increased over time.<unk>  is used following various types of reconstructive joint surgery such as knee replacement and ACL reconstruction. Its mechanisms of action for aiding joint recovery are dependent upon what surgery is performed. One mechanism is the movement of synovial fluid to allow for better diffusion of nutrients into damaged cartilage, and diffusion of other materials out; such as blood and metabolic waste products. Another mechanism is the prevention of fibrous scar tissue formation in the joint, which tends to decrease the range of<unk>  for a joint. The concept was created by Robert B. Salter M.D in 1970 and, along with help from engineer John Saringer, a device was created in 1978.
Continuous passive motion
Pressure immobilisation technique
Weight-bearing
Tendon transfer
Joint mobilization
Traction 
Autogenic training
Postural restoration