title: The effects of small shifts in body weight on blood flow and interface pressure.
abstract: The purpose of this study was to (a) determine whether small shifts in body weight change pressure and blood flow under a bony prominence, and (b) identify the magnitude of change in blood flow and pressure under a bony prominence over time. Blood flow and interface pressure in two positions (lateral oblique/supine) with two small shifts in each position (thigh/rib cage) were evaluated over time in 50 nursing home residents. There was a significant decrease in interface pressure under the trochanter through the small shifts intervention, F = 5.36, p < .01. There was a significant decrease in interface pressure, F = 3.90, p < .05, and a significant increase in blood flow, F = 4.85, p < .05, under the sacrum through the small shifts intervention. Blood flow and interface pressure did not change significantly over time.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D001783:Blood Flow Velocity / Q000502:physiology*; D001835:Body Weight / Q000502:physiology*; D005260:Female; D005269:Femur / Q000098:blood supply*; D006801:Humans; D017078:Laser-Doppler Flowmetry / Q000295:instrumentation / Q000706:statistics & numerical data; D008297:Male; D011187:Posture / Q000502:physiology; D003668:Pressure Ulcer / Q000451:nursing / Q000503:physiopathology; D012039:Regional Blood Flow; D012307:Risk Factors; D012447:Sacrum / Q000098:blood supply*; D013997:Time Factors