The range of motion is incrementally increased by how many degrees during CPM adjustments?

• A. 1-4 degrees
• B. 5-10 degrees
• C. 10-15 degrees
• D. 15-20 degrees

Answer: (B)

In continuous passive motion (CPM) after knee surgery, the range of motion is increased in small, controlled steps to protect healing tissues. The typical increment is five to ten degrees per adjustment. This gradual increase helps keep the joint moving without overstressing repair tissues, reduces pain and swelling, and supports circulation and healing of the joint surfaces.

Smaller increases, like one to four degrees, would slow progress unnecessarily, while larger jumps—ten to fifteen or fifteen to twenty degrees—can be too aggressive early on and trigger pain, swelling, or strain on the tissues. Always follow the specific protocol set by the surgeon, but the standard practice is a five-to-ten-degree advancement with each adjustment.