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. 2005 Mar;22(3):182–184. doi: 10.1136/emj.2003.007963

Rewarming of healthy volunteers after induced mild hypothermia: a healthy volunteer study

A Williams 1, A Salmon 1, P Graham 1, D Galler 1, M Payton 1, M Bradley 1
PMCID: PMC1726709  PMID: 15735265

Abstract

Objectives: The study compares the efficacy of two active and one passive warming interventions in healthy volunteers with induced mild hypothermia.

Methods: Eight volunteers were studied in a random order crossover design. Each volunteer was studied during re-warming from a core temperature of 35°C with each of: a radiant warmer (Fisher & Paykel); a forced air warmer (Augustine Medical), and a polyester filled blanket, to re-warm.

Results: No significant differences in re-warming rates were observed between the three warming devices. It was found that the subject's endogenous heat production was the major contributor to the re-warming of these volunteers. Metabolic rates of over 350 W were seen during the study.

Conclusions: For patients with mild hypothermia and in whom shivering is not contraindicated our data would indicate that the rate of re-warming would be little different whether a blanket or one of the two active devices were used. In the field, this may provide the caregiver a useful choice.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Bissonnette B., Sessler D. I., LaFlamme P. Intraoperative temperature monitoring sites in infants and children and the effect of inspired gas warming on esophageal temperature. Anesth Analg. 1989 Aug;69(2):192–196. [PubMed] [Google Scholar]
  2. Borms S. F., Engelen S. L., Himpe D. G., Suy M. R., Theunissen W. J. Bair hugger forced-air warming maintains normothermia more effectively than thermo-lite insulation. J Clin Anesth. 1994 Jul-Aug;6(4):303–307. doi: 10.1016/0952-8180(94)90077-9. [DOI] [PubMed] [Google Scholar]
  3. Giesbrecht G. G., Bristow G. K. The convective afterdrop component during hypothermic exercise decreases with delayed exercise onset. Aviat Space Environ Med. 1998 Jan;69(1):17–22. [PubMed] [Google Scholar]
  4. Giesbrecht G. G., Goheen M. S., Johnston C. E., Kenny G. P., Bristow G. K., Hayward J. S. Inhibition of shivering increases core temperature afterdrop and attenuates rewarming in hypothermic humans. J Appl Physiol (1985) 1997 Nov;83(5):1630–1634. doi: 10.1152/jappl.1997.83.5.1630. [DOI] [PubMed] [Google Scholar]
  5. Giesbrecht G. G., Schroeder M., Bristow G. K. Treatment of mild immersion hypothermia by forced-air warming. Aviat Space Environ Med. 1994 Sep;65(9):803–808. [PubMed] [Google Scholar]
  6. Goheen M. S., Ducharme M. B., Kenny G. P., Johnston C. E., Frim J., Bristow G. K., Giesbrecht G. G. Efficacy of forced-air and inhalation rewarming by using a human model for severe hypothermia. J Appl Physiol (1985) 1997 Nov;83(5):1635–1640. doi: 10.1152/jappl.1997.83.5.1635. [DOI] [PubMed] [Google Scholar]
  7. Gregory J. S., Flancbaum L., Townsend M. C., Cloutier C. T., Jonasson O. Incidence and timing of hypothermia in trauma patients undergoing operations. J Trauma. 1991 Jun;31(6):795–800. doi: 10.1097/00005373-199106000-00009. [DOI] [PubMed] [Google Scholar]
  8. Gregory J. S., Flancbaum L., Townsend M. C., Cloutier C. T., Jonasson O. Incidence and timing of hypothermia in trauma patients undergoing operations. J Trauma. 1991 Jun;31(6):795–800. doi: 10.1097/00005373-199106000-00009. [DOI] [PubMed] [Google Scholar]
  9. Hayward J. S., Eckerson J. D., Kemna D. Thermal and cardiovascular changes during three methods of resuscitation from mild hypothermia. Resuscitation. 1984 Feb;11(1-2):21–33. doi: 10.1016/0300-9572(84)90031-5. [DOI] [PubMed] [Google Scholar]
  10. Jackson S. A., Clinton C. W. Postoperative management of hypothermia of intra-operative origin--experience with a forced-air convective warming device. S Afr J Surg. 1997 Aug;35(3):134–138. [PubMed] [Google Scholar]
  11. Just B., Delva E., Camus Y., Lienhart A. Oxygen uptake during recovery following naloxone. Relationship with intraoperative heat loss. Anesthesiology. 1992 Jan;76(1):60–64. doi: 10.1097/00000542-199201000-00009. [DOI] [PubMed] [Google Scholar]
  12. Mikhail J. The trauma triad of death: hypothermia, acidosis, and coagulopathy. AACN Clin Issues. 1999 Feb;10(1):85–94. [PubMed] [Google Scholar]
  13. Pedley D. K., Paterson B., Morrison W. Hypothermia in elderly patients presenting to accident & emergency during the onset of winter. Scott Med J. 2002 Feb;47(1):10–11. doi: 10.1177/003693300204700105. [DOI] [PubMed] [Google Scholar]
  14. Taguchi A., Arkilic C. F., Ahluwalia A., Sessler D. I., Kurz A. Negative pressure rewarming vs. forced air warming in hypothermic postanesthetic volunteers. Anesth Analg. 2001 Jan;92(1):261–266. doi: 10.1097/00000539-200101000-00052. [DOI] [PubMed] [Google Scholar]
  15. Villamaria F. J., Baisden C. E., Hillis A., Rajab M. H., Rinaldi P. A. Forced-air warming is no more effective than conventional methods for raising postoperative core temperature after cardiac surgery. J Cardiothorac Vasc Anesth. 1997 Oct;11(6):708–711. doi: 10.1016/s1053-0770(97)90162-2. [DOI] [PubMed] [Google Scholar]
  16. Webb P. Afterdrop of body temperature during rewarming: an alternative explanation. J Appl Physiol (1985) 1986 Feb;60(2):385–390. doi: 10.1152/jappl.1986.60.2.385. [DOI] [PubMed] [Google Scholar]

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