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Axillary and tympanic membrane temperature measurements are unreliable early after cardiopulmonary bypass

Published online by Cambridge University Press:  27 January 2006

T. A. Khan ,
H. A. Vohra ,
S. Paul ,
M. D. Rosin  and
R. L. Patel
T. A. Khan
Affiliation:
University Hospitals Coventry and Warwickshire NHS Trust, Walsgrave Hospital, Department of Cardiothoracic Surgery, Coventry, UK
H. A. Vohra
Affiliation:
University Hospitals Coventry and Warwickshire NHS Trust, Walsgrave Hospital, Department of Cardiothoracic Surgery, Coventry, UK
S. Paul
Affiliation:
University of Oxford, Diabetes Trial Unit, Oxford, UK
M. D. Rosin
Affiliation:
University Hospitals Coventry and Warwickshire NHS Trust, Walsgrave Hospital, Department of Cardiothoracic Surgery, Coventry, UK
R. L. Patel
Affiliation:
University Hospitals Coventry and Warwickshire NHS Trust, Walsgrave Hospital, Department of Cardiothoracic Surgery, Coventry, UK
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Extract

Summary

Background and objective: Inaccurate measurements of body temperature following cardiopulmonary bypass may be associated with serious complications. The purpose of this study was to determine whether axillary and tympanic temperature measurements correlate with the urinary bladder temperature in the early postcardiac surgery period. Methods: Forty-nine adult patients who underwent cardiac surgery under cardiopulmonary bypass at our institution were prospectively studied. Urinary bladder, right axillary, right tympanic and left tympanic temperature measurements were simultaneously recorded at 0, 6, 12 and 18 h following cardiopulmonary bypass. Patients had one to four sets of recordings and a total of 629 temperature measurements were recorded. The mean difference (bias) between the bladder and each of the other methods and limits of agreement were calculated using Bland and Altman method. Results: The mean core body temperature recorded from the bladder on admission to the intensive care unit was 36.4°C. After 6, 12 and 18 h the mean core body temperature was 37.4°C (range: 35.2–39.0), 37.5°C and 37.45°C, respectively. The mean differences (bias) between the bladder temperature and the other three methods were: left tympanic, 0.65°C (95% CI: −0.24 to 1.58); right tympanic, 0.57°C (95% CI: −0.48 to 1.63) and right axillary, 0.55°C (95% CI: −0.27 to 1.36). Conclusions: The axilla and tympanic membrane are unreliable sites for core body temperature measurement early after cardiopulmonary bypass in adult patients and clinical decisions should be based on more reliable methods.

Keywords

BODY TEMPERATURE, axillary, tympanic, bladderCARDIOPULMONARY BYPASSCATHETERIZATIONSWAN GANZANAESTHESIA RECOVERY PERIODCRITICAL CARE
Type
EACTA Original Article
Information
European Journal of Anaesthesiology , Volume 23 , Issue 7 , July 2006 , pp. 551 - 554
Copyright
© 2006 European Society of Anaesthesiology

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