The Knee: In-Home Therapy Products

Both the ERMI Knee Extensionater and the ERMI Knee/Ankle Flexionater rely on the ERMI Patient-Actuated Serial Stretch or PASS protocol, coupling periods of stretch with periods of relaxation for optimal therapy.

ERMI Knee Extensionater
The ERMI Knee Extensionater is a portable, easy-to-use device that uses patented pneumatic air bladder technology to create overpressure to treat extension loss. While previous techniques involved hanging uncomfortable weights over the restricted joint, the ERMI Knee Extensionater gives patients complete control — they can add or remove load on the joint in very small increments.

ERMI Knee/Ankle Flexionater
Developed in 1991, the ERMI Knee/Ankle Flexionater allows patients to practice overpressure therapy at home to improve knee flexion. The Flexionater can generate loads from zero to several hundred foot-pounds of torque to accommodate the specific mechanical characteristics of scar tissue found in each patient. Studies have shown success rates of more than 90 percent in patients who would otherwise have returned for surgical manipulation of flexion loss.

Read this study.