Barnett R I, Ablarde J A
Department of Anatomy and Cell Biology, Queen's University, Kingston, Ontario, Canada.
Arch Phys Med Rehabil. 1995 Jun;76(6):533-40. doi: 10.1016/s0003-9993(95)80507-9.
The effects of duration and compliance of seating surfaces on reactive hyperemia within the skin overlying the ischial tuberosities was determined in four normal, one paraplegic and one cerebral palsy subject. Reactive hyperemia was demonstrated thermographically after short durations (ie, 5, 10, and 15 minutes) of seating on a hard surface. The magnitude of hyperemic response increased significantly (p < .001 for 15 v 5 minutes; p = .019 for 15 v 10 minutes; p = .001 for 10 v 5 minutes) with increased duration of seating. In all six subjects studied, the maximum postseating blood flow continued to increase with up to 15-minute seating on a hard surface, and the mean maximum response was positively correlated with duration of seating (4 = 0.918, p < 0.001). Although there was good correlations between magnitudes of interface pressures measured and vascular responses within each individual, there was no such direct correlation between individuals.
在4名正常人、1名截瘫患者和1名脑瘫患者中，研究了坐骨结节上方皮肤覆盖区域的座位表面持续时间和顺应性对反应性充血的影响。在硬表面上短时间（即5、10和15分钟）就座后，通过热成像显示出反应性充血。随着就座时间的延长，充血反应的幅度显著增加（15分钟与5分钟相比，p < 0.001；15分钟与10分钟相比，p = 0.019；10分钟与5分钟相比，p = 0.001）。在所有6名研究对象中，在硬表面上就座长达15分钟时，就座后最大血流量持续增加，平均最大反应与就座时间呈正相关（r = 0.918，p < 0.001）。虽然在每个个体中测量的界面压力大小与血管反应之间存在良好的相关性，但个体之间不存在这种直接相关性。
