Limb Skin Temperature as a Tool to Predict Orthostatic Instability.

摘要: Orthostatic instability is one of the main consequences weightlessness or gravity challenge and plays as well a crucial role in public health, being most frequent disease aging. Therefore, assessment effective countermeasures, even possibility to predict, thus prevent orthostatic great importance. Heat stress affects stability may lead impaired consciousness decrease cerebral perfusion, specifically during exposure G-forces. Conversely, peripheral cooling can intolerance - normothermic healthy subjects. Indicators vasodilation, elevated skin surface temperatures, mirror blood decentralization an increased risk instability. aim this study was quantify risk, by assessing 20 fighter jet pilot candidates' cutaneous limb with respect occurrence G-force-induced almost loss (ALOC), before push-pull maneuver, i.e., head-down tilt, combined lower body negative pressure. Peripheral temperatures from upper (both proximal distal) extremities core temperature via heat-flux approach (i.e., Double Sensor), were continuously measured maneuver. The 55% subjects that suffered ALOC procedure had higher arm thigh at baseline compared 45% remained stable. No difference distal limbs lower) found between two groups. data could be considered predicting factor for ALOC, prior rapid onset acceleration. Moreover, these findings also find applications patient care settings such intensive units.