Limits of Tolerance to Hypothermia

Pozos, Robert S.; Iaizzo, Paul A.; Danzl, Daniel F.; Mills, W. T.

doi:10.1002/cphy.cp040125

Cited by 9 publications

(5 citation statements)

References 98 publications

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“…3 Uncomfortable physical changes may result from slight decreases in peripheral temperature. 17,18 These responses may, and do, occur in the face of core normothermia.…”

Section: Discussionmentioning

confidence: 99%

Comfort, Satisfaction, and Anxiolysis in Surgical Patients Using a Patient-Adjustable Comfort Warming System: A Prospective Randomized Clinical Trial

O’Brien¹,

Greenfield²,

Anderson³

et al. 2010

Journal of PeriAnesthesia Nursing

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“…3 Uncomfortable physical changes may result from slight decreases in peripheral temperature. 17,18 These responses may, and do, occur in the face of core normothermia.…”

Section: Discussionmentioning

confidence: 99%

Comfort, Satisfaction, and Anxiolysis in Surgical Patients Using a Patient-Adjustable Comfort Warming System: A Prospective Randomized Clinical Trial

O’Brien¹,

Greenfield²,

Anderson³

et al. 2010

Journal of PeriAnesthesia Nursing

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“…Male participants were a mean (Ϯ SD) age of 25 Ϯ 3 (range: 22-31) yr, height of 180 Ϯ 6 (173-188) cm, weight of 81 Ϯ 12 (73-104) kg, and Dubois body surface area (A D) of 1.99 Ϯ 0.16 (1.85-2.30) m 2 . Female participants were a mean (ϮSD) age of 27 Ϯ 4 (22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) yr, height of 166 Ϯ 5 (160 -173) cm, weight of 60 Ϯ 9 (46 -77) kg, and A D of 1.66 Ϯ 0.13 (1.47-1.90) m 2 . All subjects were nonsmokers, nonobese, normotensive, and not taking any medications that would influence the results of the study.…”

Section: Subjectsmentioning

confidence: 99%

“…Thus vasoconstriction of the splanchnic and renal vasculatures may contribute to the cooling-induced pressor responses. Besides these implications on systemic blood pressure, cold-induced alterations in splanchnic blood flow may also provide insight into observations of intestinal ischemia during cold stress (28). Accordingly, we tested the hypothesis that skin-surface cooling induces renal and splanchnic vasoconstriction in humans.…”

mentioning

confidence: 99%

Skin-surface cooling elicits peripheral and visceral vasoconstriction in humans

Wilson

Sauder

Kearney

et al. 2007

Journal of Applied Physiology

107

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Skin-surface cooling elicits a pronounced systemic pressor response, which has previously been reported to be associated with peripheral vasoconstriction and may not fully account for the decrease in systemic vascular conductance. To test the hypothesis that whole body skin-surface cooling would also induce renal and splanchnic vasoconstriction, 14 supine subjects performed 26 skin-surface cooling trials (15-18 degrees C water perfused through a tube-lined suit for 20 min). Oral and mean skin temperature, heart rate, stroke volume (Doppler ultrasound), mean arterial blood pressure (MAP), cutaneous blood velocity (laser-Doppler), and mean blood velocity of the brachial, celiac, renal, and superior mesenteric arteries (Doppler ultrasound) were measured during normothermia and skin-surface cooling. Cardiac output (heart rate x stroke volume) and indexes of vascular conductance (flux or blood velocity/MAP) were calculated. Skin-surface cooling increased MAP (n = 26; 78 +/- 5 to 88 +/- 5 mmHg; mean +/- SD) and decreased mean skin temperature (n = 26; 33.7 +/- 0.7 to 27.5 +/- 1.2 degrees C) and cutaneous (n = 12; 0.93 +/- 0.68 to 0.36 +/- 0.20 flux/mmHg), brachial (n = 10; 32 +/- 15 to 20 +/- 12), celiac (n = 8; 85 +/- 22 to 73 +/- 22 cm.s(-1).mmHg(-1)), superior mesenteric (n = 8; 55 +/- 16 to 48 +/- 10 cm.s(-1).mmHg(-1)), and renal (n = 8; 74 +/- 26 to 64 +/- 20 cm.s(-1).mmHg(-1); all P < 0.05) vascular conductance, without altering oral temperature, cardiac output, heart rate, or stroke volume. These data identify decreases in vascular conductance of skin and of brachial, celiac, superior mesenteric, and renal arteries. Thus it appears that vasoconstriction in both peripheral and visceral arteries contributes importantly to the pressor response produced during skin-surface cooling in humans.

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“…Three types of hypothermia are classified in [18]: primary, secondary, and clinically induced (the last being out of the scope of cold-related injuries).…”

Section: Cold-related Injuriesmentioning

confidence: 99%

Working in Cold Environment: Clothing and Thermophysiological Comfort

Angelova¹

2017

Occupational Health

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The chapter presents an in-depth discussion over the occupational activities in a cold environment, which can be performed both outdoors and indoors. It explores the differences between working in natural and artificial cold environment. The thermophysiological comfort, the reactions of the thermoregulatory system during cold exposure, and cold-related injuries are presented and discussed in detail. Clothing as the only insulating barrier between the body and the cold environment is discussed, and hi-tech solutions for development of cold protective clothing are presented. The particular application of standards for the indoor environment is considered, and their input for the proper management of the occupational activities in the cold is analyzed.

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Limits of Tolerance to Hypothermia

Cited by 9 publications

References 98 publications

Comfort, Satisfaction, and Anxiolysis in Surgical Patients Using a Patient-Adjustable Comfort Warming System: A Prospective Randomized Clinical Trial

Comfort, Satisfaction, and Anxiolysis in Surgical Patients Using a Patient-Adjustable Comfort Warming System: A Prospective Randomized Clinical Trial

Skin-surface cooling elicits peripheral and visceral vasoconstriction in humans

Working in Cold Environment: Clothing and Thermophysiological Comfort

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