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Canadian Journal of Anesthesia 48:850-853 (2001)
© Canadian Anesthesiologists' Society, 2001
General Anesthesia

Preoperative core temperatures in elective surgical patients show an unexpected skewed distribution

[Les températures centrales préopératoires affichent une distribution asymétrique inattendue chez les patients de chirurgie élective]

Andrew M. Mitchell, BSc MBCHB DCH DIP OBS and R. Ross Kennedy, MBCHB PHD FANZCA

From the Department of Anesthesia, Christchurch Hospital, Christchurch, New Zealand.

Address correspondence to: Dr. A.M. Mitchell, Department of Anesthesia, Christchurch Hospital, Riccarton Avenue, Private Bag 4710, Christchurch, New Zealand. Phone/Fax: 0064 03 3655446; E-mail: andrewmitchell{at}xtra.co.nz

Purpose: To document the preoperative core temperature of adult elective surgical patients.

Methods: A prospective audit obtained sublingual temperatures from 446 adult elective surgical patients on arrival in the preoperative holding area.

Results: Temperatures ranged from 35.7°C to 37.8°C with a mean of 36.5°C (0.4 SD). The median was 36.4°C and the mode was 36.1°C. There was a skewed distribution with a clustering of values at the lower end of the range. All recordings were within the accepted normothermic range.

Conclusion: The asymmetric distribution we observed differs from previously published normothermia data which shows a symmetrical distribution of temperatures. This skewed distribution has not previously been documented and we interpret it as being due to the effect of preoperative cooling factors.




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