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What is the predictor of the intraoperative body temperature in abdominal surgery?

  • Ryohei MiyazakiEmail author
  • Sumio Hoka
Original Article

Abstract

Purpose

Inadvertent hypothermia is a relatively common intraoperative complication. Few studies have investigated predictors of body temperature change or the effect of the blanket type used with a forced-air warming device during the intraoperative period. We investigated the predictive factors of intraoperative body temperature change in scheduled abdominal surgery.

Methods

We retrospectively reviewed the data from 2574 consecutive adult patients who underwent scheduled abdominal surgery in the supine position. Temperature data were collected from anesthesia records. Multiple regression analysis was performed at 60, 120, and 180 min after the surgical incision to identify the factors influencing body temperature change. We conducted nonlinear regression analysis using the equation ΔT = α (eγt—1) + βt, where ΔT represented the change in intraoperative core temperature (°C), t represented the surgical duration (minutes), and α, β, and γ were constants.

Results

The intraoperative core temperature change was explained by the equation ΔT = 0.59 (e− 0.018t − 1) + 0.0043t. Younger age, higher body mass index (BMI), male sex, laparoscopic surgery, and use of an underbody blanket were associated with increased core temperature at 1 or 2 h after surgical incision. Male sex and an underbody blanket remained strong predictive variables even 3 h after surgical incision, whereas BMI had little explanatory power at this timepoint. The difference in the heating effect of an underbody versus an overbody blanket was 0.0012 °C per minute.

Conclusions

The blanket type of the forced-air warmer, age, sex, laparoscopic surgery, and BMI are predictors of intraoperative core temperature change.

Keywords

Body temperature Forced-air warming Inadvertent hypothermia 

Notes

Acknowledgements

We thank Kelly Zammit, BVSc, from Edanz Group, for editing a draft of this manuscript.

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Copyright information

© Japanese Society of Anesthesiologists 2018

Authors and Affiliations

  1. 1.Operating RoomsKyushu University HospitalFukuokaJapan
  2. 2.Department of Anesthesiology and Critical Care Medicine, Graduate School of Medical SciencesKyushu UniversityFukuokaJapan

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