OBJECTIVE: To evaluate the efficacy of gluteal neuromuscular electric stimulation (NMES) using implanted percutaneous electrodes to improve regional tissue health and decrease the risk of pressure ulcer development. DESIGN: Case study of long-term use of gluteal NMES. SETTING: Community. PARTICIPANT: A patient with a C4-level American Spinal Injury Association grade A spinal cord injury, 22 years postinjury at study enrollment, and a clinical history of regular grade II and occasional IV ischial pressure ulcers. INTERVENTION: Gluteal NMES using an electric stimulation system comprising a combination of implanted percutaneous electrodes and an external stimulator (controller). MAIN OUTCOME MEASURES: Objective measurements of tissue health comprising evaluation of gluteal muscle thickness, interface pressures, and regional blood flow. Subjective self-reported sitting tolerance. RESULTS: Increased gluteal muscle thickness and blood flow together with reduced regional interface pressures occurred. Weight-shifting because of alternating left and right gluteal NMES became more effective over time as the muscles strengthened. Sitting tolerance more than doubled. CONCLUSIONS: A gluteal NMES system has been developed that provides both improved regional tissue health and dynamic weight shifting while seated in the wheelchair. In the current case, regular daily use had a positive impact on multiple indirect indicators of tissue health. Continued use was indicated as the positive effects were lost when stimulation was discontinued.
OBJECTIVE: To evaluate the efficacy of gluteal neuromuscular electric stimulation (NMES) using implanted percutaneous electrodes to improve regional tissue health and decrease the risk of pressure ulcer development. DESIGN: Case study of long-term use of gluteal NMES. SETTING: Community. PARTICIPANT: A patient with a C4-level American Spinal Injury Association grade A spinal cord injury, 22 years postinjury at study enrollment, and a clinical history of regular grade II and occasional IV ischial pressure ulcers. INTERVENTION: Gluteal NMES using an electric stimulation system comprising a combination of implanted percutaneous electrodes and an external stimulator (controller). MAIN OUTCOME MEASURES: Objective measurements of tissue health comprising evaluation of gluteal muscle thickness, interface pressures, and regional blood flow. Subjective self-reported sitting tolerance. RESULTS: Increased gluteal muscle thickness and blood flow together with reduced regional interface pressures occurred. Weight-shifting because of alternating left and right gluteal NMES became more effective over time as the muscles strengthened. Sitting tolerance more than doubled. CONCLUSIONS: A gluteal NMES system has been developed that provides both improved regional tissue health and dynamic weight shifting while seated in the wheelchair. In the current case, regular daily use had a positive impact on multiple indirect indicators of tissue health. Continued use was indicated as the positive effects were lost when stimulation was discontinued.
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