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Biomechanical study on axillary crutches during single-leg swing-through gait
Prosthetics and Orthotics International
|August 1, 1986
Summary
This study analyzed axillary crutch use during gait, finding significant forces on the leg and arm. Incorrect use can lead to harmful pressure in the underarm area.
Area of Science:
- Biomechanics
- Orthopedics
- Rehabilitation Engineering
Background:
- Axillary crutches are common mobility aids for leg impairments.
- Understanding the forces involved in crutch use is crucial for preventing secondary injuries.
Purpose of the Study:
- To conduct a kinetic and kinematic study of axillary crutches during one-leg swing-through gait.
- To evaluate forces at crutch-body interfaces and their relation to common problems.
- To investigate the impact of incorrect crutch usage.
Main Methods:
- Kinematic and kinetic analysis of ten healthy males with simulated leg impairment.
- Utilized VICON motion capture, Kistler force plate, and instrumented crutches with transducers.
- Measured ground reaction forces and forces transmitted through the crutches.
Main Results:
- Peak ground reaction force on the weight-bearing leg increased by 21.6% bodyweight.
- Peak arm reaction force during crutch stance reached 44.4% bodyweight.
- Incorrect crutch use resulted in 34% bodyweight carried by the underarm, risking neurovascular compression.
Conclusions:
- Elevated forces on the weight-bearing leg and upper extremities during crutch use can be detrimental.
- Improper axillary crutch application poses risks of secondary injury, particularly neurovascular compromise in the axilla.