The effect of surface electric stimulation of the gluteal muscles on the interface pressure in seated people with spinal cord injury.

OBJECTIVE To study effects of surface electric stimulation of the gluteal muscles on the interface pressure in seated persons with spinal cord injury (SCI). DESIGN One session in which alternating and simultaneous surface electric stimulation protocols were applied in random order. SETTING Research laboratory of a rehabilitation center. PARTICIPANTS Thirteen subjects with SCI. INTERVENTION Surface electric stimulation of the gluteal muscles. MAIN OUTCOME MEASURES Interface pressure, maximum pressure, pressure spread, and pressure gradient for the stimulation measurement. Variables were compared using 2-tailed paired t tests. RESULTS Alternating and simultaneous stimulation protocol caused a significant (P<.01) decrease in interface pressure (-17+/-12 mmHg, -19+/-14 mmHg) and pressure gradient (-12+/-11 mmHg, -14+/-12 mmHg) during stimulation periods compared with rest periods. There was no significant difference in effects between the 2 protocols. CONCLUSIONS Surface electric stimulation of the gluteal muscles in persons with SCI causes a decrease in interface pressure. This might restore blood flow in compressed tissue and help prevent pressure ulcers.