Barnett R I, Ablarde J A
Adv Wound Care. 1994 Jan;7(1):58-65.
The effects of duration and posture on reactive hyperemia in the skin overlying the greater trochanter of the femur was determined in normal subjects using thermography. Multivariate analysis revealed that in the six subjects studied, post-lying blood flow within the skin superficial to bony prominences was significantly increased over that of the preexperimental and passively-warmed controls. These analyses also showed that both maximal interface pressures and vascular reactions were experienced in the side-lying position when the legs were extended, and significantly reduced when the legs were flexed. While there was good correlation between magnitudes of interface pressures measured and vascular responses within each individual, there was no such direct correlation between individuals. The individual with the highest interface pressures did not have the most intense reactive hyperemic reactions, and the individual with the least interface pressures did not have the least intense reactive hyperemic reactions. Intrinsic features of each individual's vascular response to the normal mechanical forces experienced during lying appear to be a sensitive measure of the individual's susceptibility to develop pressure ulcers.
利用热成像技术，在正常受试者中测定了时长和姿势对股骨大转子上方皮肤反应性充血的影响。多变量分析显示，在所研究的6名受试者中，骨隆突上方皮肤的躺卧后血流量比实验前和被动加热对照组显著增加。这些分析还表明，当双腿伸直处于侧卧位时，最大界面压力和血管反应都会出现，而当双腿弯曲时则会显著降低。虽然在每个个体中，所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。界面压力最高的个体并没有最强烈的反应性充血反应，而界面压力最小的个体也没有最不强烈的反应性充血反应。个体血管对躺卧期间所经历的正常机械力的反应的内在特征似乎是个体发生压疮易感性的敏感指标。
