The therapy is called passive because you let the machine do the work.
This article will explain what CPM is and what to expect before and after therapy.
It will also describe some of the risks of CPM therapy and whether they actually help.
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What Does a CPM Machine Do?
A CPM machine is used during the first phase of rehabilitation following joint injury or surgery.
The motorized unit continually moves a joint through a controlled range of motion.
The levels can be increased over time as recovery progresses.
Do Continuous Passive Motion Machines Help?
Even so, some people may have less benefit than others.
Certain CPM therapies, like those used for elbow injuries, have demonstrated little to no benefit.
This includes whether passive or active mobilization will be used and why.
Before Therapy
Your surgical team will prepare you in advance if CPM therapy has been prescribed.
CPM therapy may start immediately in the recovery room after surgery or the day after your surgery.
At-home therapy may continue for several weeks.
The units generally conform to the joint that is being treated.
During the procedure, you may feel slight discomfort but should not feel outright pain.
If at-home CPM is needed, you will be given instructions on how to use the machine.
If you are unsure or experience pain, let your healthcare provider know.
CPM is often used with other physical therapies.
Is CPM Covered by Insurance?
UnderMedicare Part B, at-home CPM units are covered for knee replacement surgery for up to 21 days.
This may include a self-assessment survey like the Knee Outcome Survey Activities of Daily Living Scale (KOS-ADLS).
The treatment involves a motorized gear that moves a joint repetitively at a set speed and range of motion.
CPM therapy may start in the hospital and continue at home with a home unit.
U.S. Centers for Medicare and Medicaid Services.Continuous passive motion devices.
2015;473(11):3348-54. doi:10.1007/s11999-015-4528-y
St. Jude Children’s Research Hospital.Continuous passive motion after surgery.
