Author/Editor		Tanabe, Minoru; Shido, Osamu; Nagasaka, Tetsuo
Title		Lower body negative pressure suppresses sweating rate in hyperthermic subjects
Type		članek
Source		In: Hočevar A, Črepinšek Z, Kajfež-Bogataj L, editors. Biometeorology 14. Proceedings of the 14th international congress of biometeorology. Part 2. (Vol 2); 1996 Sep 1-8; Ljubljana. Ljubljana: Slovenian meteorological society,
Publication year		1996
Volume		str. 341-7
Language		eng
Abstract		Changes in sweating rate and sweat expulsion during lower body negative pressure (LBNP) were investigated in 7 volunteers in hyperthermia. The lower body of the supine subjects was put in an acrylic LBNP box, which was covered with heating equipment to maintain the air temperature inside the box at 50 degrees C. Measured parameters were sweating rate (msw) on the forehead, trunk, forearm and thigh, temperatures of the tympanum(Tty), esophagus (Tes) and skin (Tsk), heart rate (HR) and blood pressure (BP). Sweat expulsions (Fsw) were carefully identified on the sweat rate records from the trunk and the forearm. Mean skin (Tsk) and mean body (Tb) temperatures were calculated. After thermal equilibrium had attained, either 50 100 or 150 mm H2) of LBNP was applied for 4 min in a random order. The application of LBNP did not produce any change in Tty, Tes, Tb and Tsk, but msw and Fsw decreased especially for the first 2 min of LBMP. Since the thermal input did not change during this period of LBNP, this reduction of sweating rate may be attributed to a low-pressure cardiopulmonary baroreceptor reflex.
Descriptors		HYPERTHERMIA, INDUCED BODY TEMPERATURE HEART RATE BLOOD PRESSURE SWEATING ADULT SKIN TEMPERATURE ESOPHAGUS TYMPANIC MEMBRANE