Print Email Facebook Twitter Finger cold-induced vasodilatation during hypothermia, hyperthermia and at thermoneutrality Title Finger cold-induced vasodilatation during hypothermia, hyperthermia and at thermoneutrality Author Daanen, H.A.M. Ducharme, M.B. Publication year 1999 Abstract BACKGROUND: Exposure of the fingers to severe cold leads to cold-induced vasodilation (CIVD). The influence of ambient temperature on the CIVD-response is well understood and documented, but the response of CIVD to hyperthermia and mild hypothermia has rarely been investigated. METHODS: To investigate the influence of body thermal status on the CIVD response, eight subjects immersed their right hand in 5 degrees C water for 40 min during mild hypothermia (C), thermoneutrality (N) and hyperthermia (W). The mean skin temperature of the body (Tsk), the esophageal temperature (Tes), the temperature of the volar side of the distal phalanx of each immersed finger (Tfi) and the skin perfusion of the immersed middle finger (Qsk) were continuously measured. RESULTS: During the W condition the body temperatures were higher (Tes: 38.0+/-0.1 degrees C; Tsk: 37.9+/-0.7 degrees C) than during N (Tes: 36.8+/-0.2 degrees C; Tsk: 31.8+/-0.7 degrees C) and during C (Tes: 36.1+/-0.8 degrees C; Tsk: 21.2+/-1.9 degrees C). Tfi and Qsk were higher during the W condition (Tfi: 16.5+/-2.3 degrees C; Qsk: 133+/-53 perfusion units (PU)) than during N (Tfi: 8.1+/-1.7 degrees C; Qsk: 57+/-39 PU) and during C (Tfi: 6.8+/-1.2 degrees C; Qsk: 22+/-14 PU). The onset time of CIVD was significantly prolonged in condition C (13.0+/-3.8 min) as compared with N (7.2+/-2.2 min). CONCLUSION: It was concluded that the CIVD response is significantly affected by body core and skin temperatures. Subject aviationFinger blood flowHunting responseHyperthermiaHypothermiaLaser Doppler flowmetryvasodilatationAdultAnalysis of VarianceBody TemperatureColdEsophagusFingersHyperthermia, InducedHypothermia, InducedImmersionLaser-Doppler FlowmetryMonitoring, PhysiologicTime FactorsVasodilation To reference this document use: http://resolver.tudelft.nl/uuid:f8c7c238-3dc2-4002-b4a1-d7a52a2fe280 TNO identifier 11517 Source Aviation, Space, and Environmental Medicine, 70 (12), 1206-1210 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.