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Metabolic rate and rewarming speed of hypothermic neonatal lambs given thermal assistance or added insulation

Published online by Cambridge University Press:  02 September 2010

J. B. Robinson ,
M. Okamoto ,
B. A. Young  and
R. J. Christopherson
J. B. Robinson
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta, T6G 2P5 Canada
M. Okamoto
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta, T6G 2P5 Canada
B. A. Young
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta, T6G 2P5 Canada
R. J. Christopherson
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta, T6G 2P5 Canada
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Abstract

To evaluate passive and active methods for rewarming hypothermic lambs, the rectal temperature of 19 neonatal lambs (4·9 (s.e. 0·34) kg) was reduced to 35°C by cold water immersion. Metabolic responses and change in rectal temperature were monitored as the hypothermic lambs recovered with added insulation in a 20 to 25°C air environment, or with thermal assistance provided by an infrared heat lamp, or through immersion in 38°C water. During the first 12 min of rewarming, the rise in rectal temperature in all treatment groups was linear, however it was more rapid with the lambs immersed in warm water (0·26°C/min; P < 0·05) as compared with the insulated lambs (0·21°C/min) and the lambs rewarmed with a heat lamp (0·22°C/min). During this 12-min period, the insulated lambs produced metabolic heat more rapidly than did the warm-water lambs, 13·6 v. 11·1 (s.e. 0·67) W/kg, respectively (P < 0·05). These data indicate that there was a substantial influx of heat which contributed to the increase in body temperature of the lambs immersed in warm water. Stabilization of rectal temperature occurred after 18 to 20 min in all treatment groups. The lambs recovered in all treatment groups, in addition, no clinical problems were observed in any of the lambs during the tests or subsequently when they were returned to their dams.

Type
Research Article
Information
Animal Production , Volume 43 , Issue 1 , August 1986 , pp. 115 - 120
Copyright
Copyright © British Society of Animal Science 1986

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References

REFERENCES

Alexander, G. 1962. Temperature regulation in the new-born lamb. V. Summit metabolism. Australian Journal of Agricultural Research 13: 100–121.CrossRefGoogle Scholar
Behnke, A. R. and Yaglou, C. P. 1951. Physiological responses of men to chilling in ice water and to slow and fast rewarming. Journal of Applied Physiology 3: 591–602.CrossRefGoogle ScholarPubMed
Burton, A. C. and Edholm, O. G. 1955. Man in a Cold Environment. Edward Arnold, London.Google Scholar
Collis, M. L., Steinman, A. M. and Chaney, R. D. 1977. Accidental hypothermia: an experimental study of practical rewarming methods. Aviation Space and Environmental Medicine 48: 625–632.Google ScholarPubMed
Eales, F. A., Small, J. and Gilmour, J. S. 1982. Resuscitation of hypothermic lambs. Veterinary Record 110: 121–123.CrossRefGoogle ScholarPubMed
Hayward, J. S., Eckerson, J. D. and Collis, M. L. 1977. Thermoregulatory heat production in man: prediction equation based on skin and core temperatures. Journal of Applied Physiology 42: 377–384.CrossRefGoogle ScholarPubMed
Marcus, P. 1978. Laboratory comparison of techniques for rewarming hypothermic casualties. Aviation Space and Environmental Medicine 49: 692–697.Google ScholarPubMed
McLean, J. A. 1972. On the calculation of heat production from open-circuit calorimetric measurements. British Journal of Nutrition 27: 597–600.CrossRefGoogle ScholarPubMed
Minard, D. 1970. Body heat content. In Physiological and Behavioural Temperature Regulation, (ed. Hardy, J. D., Gagge, A. P. and Stolwijk, J. A. J.), pp. 345–357. Charles C. Thomas, Springfield, II.Google Scholar
Olson, D. P., South, P. J. and Hendrix, K. 1983. Regional differences in body temperature in hypothermic and rewarmed young calves. American Journal of Veterinary Research 44: 564–571.Google ScholarPubMed
Reuler, J. B. and Parker, R. A. 1978. Peritoneal dialysis in the management of hypothermia. Journal of the American Medical Association 240: 2289–2290.CrossRefGoogle ScholarPubMed
Samson, D. E. and Siee, J. 1981. Factors affecting resistance to induced body cooling in newborn lambs of 10 breeds. Animal Production 33: 59–65.Google Scholar
Slee, J. 1977. Cold stress and lamb mortality. Proceedings of the Symposium on Perinatal Losses in Lambs, University of Stirling, pp. 30–34. East of Scotland College of Agriculture, Edinburgh.Google Scholar
Slee, J., Griffiths, R. G. and Samson, D. E. 1980. Hypothermia in newborn lambs induced by experimental immersion in a water bath and by natural exposure outdoors. Research in Veterinary Science 28: 275–280.CrossRefGoogle Scholar
Sperling, D. R. and Beran, A. V. 1976. Hypothermia and rewarming by peritoneal dialysis and temperature- controlled inhalate. Annals of Thoracic Surgery 21: 151–157.CrossRefGoogle ScholarPubMed
Steel, R. G. D. and Torrie, J. H. 1980. Principles and Procedures of Statistics. McGraw-Hill, New York.Google Scholar
Webb, P. 1973. Rewarming after diving in cold water. Aerospace Medicine 44: 1152–1157.Google ScholarPubMed
Welton, D. E., Mattox, K. L., Miller, R. R. and Petmecky, F. F. 1978. Treatment of profound hypothermia. Journal of the American Medical Association 240: 2291–2292.CrossRefGoogle ScholarPubMed
Withers, F. W. 1952. Mortality rates and disease incidence in calves in relation to feeding, management and other environmental factors. Part II. British Veterinary Journal 108: 382–405.CrossRefGoogle Scholar
Young, B. A., Kerrigan, B. and Christopherson, R. J. 1975. A versatile respiratory pattern analyzer for studies of energy metabolism of livestock. Canadian Journal of Animal Science 55: 17–22.CrossRefGoogle Scholar
Young, B. A., Fenton, T. W. and McLean, J. A. 1984. Calibration methods in respiratory calorimetry. Journal of Applied Physiology 56: 1120–1125.CrossRefGoogle ScholarPubMed