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Definition of Continuous passive motion machine

Continuous passive motion machine: A machine used to help rehabilitate a limb (an arm or leg).

The continuous passive motion (CPM) machine is attached to, for example, a knee that has had surgery. The CPM machine then constantly moves the knee through a range of motion for a period of time while the patient relaxes.

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 6/14/2012

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