PRELIMINARY EVALUATION OF VARIATIONS IN CONTROL STRATEGY FOLLOWING TRANSHUMERAL OSSEOINTEGRATION
DOI:
https://doi.org/10.57922/mec.2474Abstract
While not as common as transfemoral applications, osseointegration at the transhumeral level has been performed across multiple clinical sites. Our experience with this amputation level has predominantly been with the use of the OPRA implant. We have followed a staged rehabilitation program inclusive of an early trainer to facilitate progressive positive and negative loading, a full-length, light weight, non-prehensile prosthetic arm and definitive arm prostheses. These have included both body-powered and externally powered definitive solutions. In the absence of a transhumeral socket, the facilitation of control strategies for both body-powered and myoelectric prostheses have required adaptation. For body powered systems, because of the direct attachment of a bone-anchored prosthesis, harnessing elements designed for suspension can be eliminated, while those that enable control of the terminal device, wrist or elbow most be modified and preserved. Accordingly, correct placement of the base plate and housing retainer for the control cable must be achieved in the absence of an external socket. This has been accomplished via external rigid outriggers for longer residual limbs or through their attachment to proximal endoskeletal or exoskeletal bridges with shorter residual limbs. For externally powered prostheses, the challenge lies in consistent placement of the surface electrodes that may be required over the residual limb, the ipsilateral chest wall or ipsilateral scapular region. This has been accomplished through outriggers, adhesive electrodes, non-custom electrode cuffs and custom silicone interfaces. These methods of facilitating traditional control strategies in the absence of the transhumeral socket will be described and discussed.
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Published
2024-08-15
How to Cite
[1]
B. Monroe and P. Stevens, “PRELIMINARY EVALUATION OF VARIATIONS IN CONTROL STRATEGY FOLLOWING TRANSHUMERAL OSSEOINTEGRATION”, MEC Symposium, Aug. 2024.
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