scholarly journals Morphological dependency of cutaneous blood flow and sweating during compensable heat stress when heat-loss requirements are matched across participants

2016 ◽  
Vol 121 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Sean R. Notley ◽  
Joonhee Park ◽  
Kyoko Tagami ◽  
Norikazu Ohnishi ◽  
Nigel A. S. Taylor
Keyword(s):  
Blood Flow ◽  
Heat Stress ◽  
Heat Loss ◽  
Cutaneous Blood Flow ◽  
Cutaneous Blood

Effects of artificially-induced anaemia on sudomotor and cutaneous blood flow responses to heat stress

1997 ◽  
Vol 76 (4) ◽  
pp. 380-386 ◽  
Author(s):  
Nigel A. S. Taylor ◽  
Mark J. Patterson ◽  
James D. Cotter ◽  
Duncan J. Macfarlane
Keyword(s):  
Blood Flow ◽  
Heat Stress ◽  
Cutaneous Blood Flow ◽  
Cutaneous Blood

Method for measuring regional heat losses in man

1980 ◽  
Vol 49 (3) ◽  
pp. 533-535 ◽  
Author(s):  
A. R. Gin ◽  
M. G. Hayward ◽  
W. R. Keatinge
Keyword(s):  
Blood Flow ◽  
Heat Flow ◽  
Heat Loss ◽  
Local Heat ◽  
Heat Losses ◽  
Cutaneous Blood Flow ◽  
Rubber Sheet ◽  
Tissue Insulation ◽  
Flow Devices ◽  
Cutaneous Blood

Flexible heat flow devices were constructed from 0.4-mm-thick nylon-reinforced rubber sheet, with multiple copper-constantan thermocouples on each side to measure mean temperature difference across the sheet. A method of calibration is described that corrects for the alteration of local heat loss produced by the device itself. It was shown that such errors would otherwise be large when cutaneous blood flow was high, and tissue insulation low, even with devices as thin as these.

Effect of voluntary hypocapnic hyperventilation on cutaneous circulation in resting heated humans

2012 ◽  
Vol 303 (9) ◽  
pp. R975-R983 ◽  
Author(s):  
Naoto Fujii ◽  
Yasushi Honda ◽  
Stephane Delliaux ◽  
Bun Tsuji ◽  
Kazuhito Watanabe ◽  
...  
Keyword(s):  
Blood Flow ◽  
Heat Stress ◽  
Spontaneous Breathing ◽  
Hot Water ◽  
Cutaneous Blood Flow ◽  
Voluntary Hyperventilation ◽  
Blood Flow Response ◽  
Flow Response ◽  
Significant Difference ◽  
Cutaneous Blood

Hypocapnia attenuates the sweat response normally seen in hyperthermic resting subjects, but its effect on the blood flow response in their nonglabrous skin under the same hyperthermic conditions remains unclear. In the present study, we investigated whether hypocapnia induced by voluntary hyperventilation affects the blood flow response to heat stress in the nonglabrous skin of resting humans. Nine healthy male subjects were passively heated using legs-only hot water immersion and a water-perfused suit, which caused esophageal temperature (Tes) to increase by as much as 1.0°C. During normothermia and at +0.6°C Tes and +1.0°C Tes, the subjects performed two voluntary 7-min hyperventilation (minute ventilation = 40 l/min) trials (hypocapnic and eucapnic) in random order. End-tidal CO2 pressure was reduced by 23–25 torr during hypocapnic hyperventilation, but it was maintained at the spontaneous breathing level during eucapnic hyperventilation. Cutaneous blood flow was evaluated as the cutaneous red blood cell flux in the forearm (CBFforearm) or forehead (CBFforehead) and was normalized to the normothermic spontaneous breathing value. Hypocapnic hyperventilation at +0.6°C Tes was associated with significantly reduced CBFforearm, compared with eucapnic hyperventilation, after 5–7 min of hyperventilation (395 to 429 vs. 487 to 525% baseline, P < 0.05). No significant difference in CBFforehead was seen during hypocapnic hyperventilation compared with eucapnic hyperventilation at +0.6°C Tes or +1.0°C Tes. These results suggest that in resting humans, hypocapnia achieved through voluntary hyperventilation attenuates the increase in cutaneous blood flow elicited by moderate heat stress in the nonglabrous skin of the forearm, but not the forehead.

The Vasostimulant Effect of the Electric Pulse Stimulator on the Cutaneous Blood Flow.

1997 ◽  
Vol 59 (2) ◽  
pp. 255-256
Author(s):  
Yuka NAKAMURA ◽  
Shinichi WATANABE ◽  
Hisashi TAKAHASHI ◽  
Atsuhiko HASEGAWA
Keyword(s):  
Blood Flow ◽  
Electric Pulse ◽  
Cutaneous Blood Flow ◽  
Cutaneous Blood

Relation of local skin temperature and local sweating to cutaneous blood flow

1963 ◽  
Vol 18 (4) ◽  
pp. 781-785 ◽  
Author(s):  
Leo C. Senay ◽  
Leon D. Prokop ◽  
Leslie Cronau ◽  
Alrick B. Hertzman
Keyword(s):  
Blood Flow ◽  
Skin Temperature ◽  
Sweat Gland ◽  
Cutaneous Blood Flow ◽  
Local Skin ◽  
Cutaneous Vasodilatation ◽  
Local Skin Temperature ◽  
Relationship Of ◽  
The Relationship ◽  
Cutaneous Blood

The relationship of local skin temperature and the onset of sweating to the local cutaneous blood flow was studied in the forearm and calf. The purpose of the investigation was to appraise the possible relation of sweat gland activity to the cutaneous vasodilatation which has been attributed to bradykinin or to intracranial temperatures. The onset of sweating was not marked by any apparently related increases in the rate of cutaneous blood flow. On the contrary, the onset of sweating was followed often by a stabilization or even a decrease in the level of cutaneous blood flow. The relations of the latter to the local skin temperature were complex, particularly in the forearm. There appeared to be additional unidentified influences, possibly vasomotor, operating on the skin vessels during transitional phases in the relation of skin temperature to blood flow. Submitted on October 15, 1962

A New Model: Bipediculated Dorsal Flap of Hairless Rat for Cutaneous Blood Flow Evaluation

1989 ◽  
Vol 2 (4) ◽  
pp. 198-203 ◽  
Author(s):  
F. Auclair ◽  
M. Besnard ◽  
C. Dupont ◽  
J. Wepierre
Keyword(s):  
Blood Flow ◽  
Cutaneous Blood Flow ◽  
New Model ◽  
Cutaneous Blood ◽  
Blood Flow Evaluation

Cardiovascular and sweating responses to water ingestion during dehydration

1965 ◽  
Vol 20 (5) ◽  
pp. 975-979 ◽  
Author(s):  
Leo C. Senay ◽  
Margaret L. Christensen
Keyword(s):  
Blood Flow ◽  
The Body ◽  
Evaporative Heat Loss ◽  
Cutaneous Blood Flow ◽  
Temperature Changes ◽  
Fluid Ingestion ◽  
Water Ingestion ◽  
Heat Chamber ◽  
Saline Ingestion ◽  
Cutaneous Blood

The experiments reported are concerned with cardiovascular and sudomotor events preceding, accompanying, and following ingestion of water by five dehydrating subjects 8.75 hr after entrance into a heat chamber (43.3 C DB, 29 C WB). Certain skin areas such as the cheek showed increases in evaporative heat loss before subjects came in contact with water. This reflex could be initiated by saline ingestion but the degree of skin and oral temperature changes appeared to depend on tonicity of fluid ingested. The gustatory reflex was not thought to be the initiating agent for sudomotor responses. Increases in cutaneous blood flow appeared to begin almost as promptly as sweating responses but took considerably longer to develop. Ingestion of saline, though initiating a sweating response, did not alter heart rate, blood pressure, or cutaneous blood flow. It is suggested that fluid ingestion, regardless of tonicity, triggers reflex sweating over the body surface. Intensity and duration of this sudomotor response, as well as initiation of cardiovascular changes, apparently depend on tonicity of ingested fluid. cutaneous blood flow; skin temperature; regional sweating Submitted on November 27, 1964

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