Evaporative Water Loss from Burns Under Different Environmental Conditions

Lamke, L O

doi:10.3109/02844317109042942

Cited by 21 publications

(11 citation statements)

References 9 publications

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“…This agrees with the relationship put forward by Penman (1956) to describe evaporation from an open water surface, which has been confirmed by more recent studies of evaporation from water surfaces and fields of crops (Szeicz et al, 1969;Stigter, 1980), and also applied to heat and mass transfer through coats and clothing (Campbell et al, 1979). Measurements by Jelenko and Wheeler (1967) and Lamke and Wedin (1971) of evaporation rates from water surfaces made with similar techniques to those used for deriving the evaporation rate from skin, gave values for the diffusion resistance which were 5&80 per cent higher than those derived from the present study. The method employed was to determine the vapour content of air passed over a small area of skin (25 cm or less) in an enclosed system.…”

Section: Discussionsupporting

confidence: 83%

“…The energy consumed by the phantom was reduced by about 90 W m P 2 for a given rate of evaporation (Fig. 7), and there was a reduction in evaporation rate of about 30 mg m-' s-l. and Wedin, 1971;Grice et al, 1971), burned rabbit skin in vivo (Jelenko and Wheeler, 1967) or human skin in vitro (Jelenko and Wheeler, 1967;Lamke and Liljedahl, 1971;Mathias et al, 1981). One set of data was obtained from measurements of vapour pressure gradient above the skin of human subjects in vivo (Lamke et al, 1978).…”

Section: Supply Of External Heatmentioning

confidence: 98%

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The Influence of Environmental Factors on Evaporation and Heat Loss from Burned Tissue

Martin

Muir

1985

Engineering in Medicine

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Destruction of skin by severe burning leads to substantial loss of fluid. Increased evaporative heat loss in addition to energy demands for tissue repair causes hypermetabolism in a severely burned patient, placing a large stress on the body. The dependence of evaporation rate and energy supply on environmental variables has been studied using a phantom in which a free water surface simulated burned tissue. Vapour diffusion resistances have been derived from the experiments, and compared with values calculated from data obtained from other studies of burned tissue. These can be used to predict rates of evaporation and heat loss for burned tissue, and their dependence on different environmental factors. Experiments have shown that energy in the form of radiant heat or warm air blown over the water surface can be supplied to reduce heat losses without significantly affecting evaporation rate.

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Section: Discussionsupporting

confidence: 83%

Section: Supply Of External Heatmentioning

confidence: 98%

The Influence of Environmental Factors on Evaporation and Heat Loss from Burned Tissue

Martin

Muir

1985

Engineering in Medicine

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“…The mean of the back, chest, forearm and thigh has previously been shown to compare well with measurements of total weight loss during body heating (Lamke and Wedin, 1971).…”

Section: Methodsmentioning

confidence: 84%

Regional rates of sweat evaporation during leg and arm cycling.

Ayling¹

1986

Br J Sports Med

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The rate of sweat evaporation from the arm, chest, back and thigh, aural temperature, skin temperature (arm, chest, back and thigh), heat production (derived from measurements of respiratory gas exchange) and heart rate were measured in 7 men during 15 minutes of leg or arm cycling at 32% of predicted maximum oxygen uptake (VO2 max). The regional sweat evaporation rates and changes in body temperature were similar during both forms of exercise. The peak rates of sweat evaporation from the arm, chest, back and thigh were 15.7 +/- 19.8, 25.0 +/- 21.6, 28.7 +/- 22.7 and 21.0 +/- 18.2 mg.cm-2 hr-1 during leg cycling and 13.2 +/- 11.6, 22.2 +/- 14.4, 27.6 +/- 14.7 and 19.2 +/- 13.3 (SD) mg.cm-2 hr-1 respectively during arm cycling. The sweat evaporation rates from the different body regions were not significantly different from one another.

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“…The humidity of the air entering and leaving the cup was measured by dew point sensing elements (Michell Instruments). The difference in humidity between ingoing and outgoing air was used to derive evaporative water loss from the skin (Lamke & Wedin, 1971;Ayling, 1986).…”

Section: Measurement Ofsweat Evaporationmentioning

confidence: 99%

Effect of glycopyrrolate and atropine on thermoregulation after exercise.

Simpson¹,

Green²,

Ellis³

1986

Brit J Clinical Pharma

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The effects of two anticholinergic drugs on heat production (derived from oxygen consumption), sweating and core and skin temperature were compared with saline placebo in five healthy volunteers, before and after exercise. There were no significant differences between the groups in resting and peak heat production after exercise. Sweat evaporation rate increased after exercise in all cases, but there was individual variation in response to the drugs. Sweat evaporation was greater after saline placebo compared with atropine, but not after glycopyrrolate compared with saline placebo or atropine. In the saline placebo group, increased sweat evaporation following exercise was reflected by an initial fall, in skin temperature. Following anticholinergic drugs, skin temperature increased after exercise without an initial decrease. Core temperature increased following exercise, but there were no significant differences between the anticholinergic drugs and saline placebo. Although clinical doses of anticholinergic drugs, when compared with saline placebo, inhibited sweating after exercise, core temperature was not significantly increased. Therefore it is suggested that non‐evaporative heat loss compensated for the reduction in sweating due to anticholinergic drugs.

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Evaporative Water Loss from Burns Under Different Environmental Conditions

Cited by 21 publications

References 9 publications

The Influence of Environmental Factors on Evaporation and Heat Loss from Burned Tissue

The Influence of Environmental Factors on Evaporation and Heat Loss from Burned Tissue

Regional rates of sweat evaporation during leg and arm cycling.

Effect of glycopyrrolate and atropine on thermoregulation after exercise.

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