Related Experiment Videos
Compensatory motion in the upper extremity after elbow arthrodesis.
O R O'Neill1, B F Morrey, S Tanaka
1Orthopedic Biomechanics Laboratory, Mayo Clinic/Mayo Foundation, Rochester, Minnesota 55905.
Clinical Orthopaedics and Related Research
|August 1, 1992
Summary
Simulating elbow arthrodesis (surgical fusion) at various angles significantly impairs function. Adjacent shoulder and wrist joints cannot fully compensate, limiting activities of daily living.
Area of Science:
- Orthopedic surgery
- Biomechanics
- Rehabilitation medicine
Background:
- Elbow arthrodesis is a procedure to fuse the elbow joint, often to manage severe pain or instability.
- Understanding the functional limitations post-arthrodesis is crucial for patient management and rehabilitation.
Purpose of the Study:
- To investigate the functional impact of elbow arthrodesis at different flexion angles.
- To assess the compensatory capabilities of the shoulder and wrist joints following simulated elbow fusion.
Main Methods:
- Ten healthy male subjects performed tasks simulating normal elbow function.
- A custom brace simulated elbow arthrodesis at 50, 70, 90, and 110 degrees of flexion.
- Shoulder motion (3 Space Isotrak), wrist compensation (triaxial wrist goniometer), and qualitative compensatory movements were measured.
Main Results:
- Elbow arthrodesis at any tested angle resulted in significant functional impairment.
- Shoulder and wrist joints demonstrated insufficient compensatory motion to overcome the fused elbow.
- Completion of functional tasks was severely limited regardless of the arthrodesis angle.
Conclusions:
- Elbow arthrodesis leads to substantial and unavoidable functional deficits.
- The shoulder and wrist joints cannot adequately compensate for the loss of elbow mobility.
- These findings highlight the critical role of the elbow joint in overall upper extremity function.