Continuous Passive Motion (CPM) Devices - Kinetec Centura CEM - elbow : Kinetec Centura CEM provides anatomically correct elbow extension/flexion in an abducted position. Quick and easy change-over from an existing shoulder pattern. ROM: extension 10 degrees and flexion 135 degrees. Extension with fixed, adjustable pronation/supination in an abducted, rotated plane.