Continuous Passive Motion Machine: What Went Wrong
The Continuous Passive Motion Machine is a device designed in the early 1970’s with the idea of helping knee surgery patients regain range of motion. The hope was that hours of moving the leg back and forth would loosen up the knee and allow the patient to gain extension (knee movement up, away from the body) and flexion (knee movement down, back toward the body).
Continuous Passive Motion Machine, Conclusive Results
For people who have had total knee replacement without complications, continuous passive motion has not been shown to provide clinically relevant benefits. CPM does not improve long-term function, long-term knee flexion, knee extension in the short or long term, and has not been shown to reduce pain and or increase quality of life. Additionally, CPM is inconvenient, and brings risk of complication while distracting patients from useful treatment. In very rare cases where the person has problems which prevent standard mobilization treatment, then CPM may be useful. Patient compliance is key to rehabilitation and generally patients to not like to use the CPM. Furthermore, with patients attempting at-home therapies, most follow orders with improper form that either limits improvement or in some cases, causes harm.
The failure of the Continuous Passive Motion Machine (CPM) is mostly that it never evolved past a very basic means of movement. The model designed during the advent of knee replacement surgery is still the same today. A new kind of Continuous Passive Motion Machine was never created.
Today there are PMKR, Pressure Modulated Knee Rehabilitation. PMKR machines, like the X10. PMKR machines do deliver the results that were hoped for the CPM. Fast recovery. Fast return to work and life. Avoidance of complications. Beating the dangers of scar tissue development. Many thousands of patients have used PMKR and as surgeons learn about it, they quickly adopt this technology.