Anesth Pain Med.  2020 Jul;15(3):349-355. 10.17085/apm.20006.

Effects of 10-min prewarming on core body temperature during gynecologic laparoscopic surgery under general anesthesia: a randomized controlled trial

• Lee SY
• Kim SJ
• Jung JY

• KMID: 2504898
• DOI: http://doi.org/10.17085/apm.20006

Abstract

Background
Previous research has shown a beneficial effect of prewarming for preventing inadvertent perioperative hypothermia. However, there are few studies of the effects of a short prewarming period, especially in gynecologic laparoscopic surgery.
Methods
Fifty-four patients were randomly assigned to 2 groups. Patients in the non-prewarming group were only warmed intraoperatively with a forced air warming device, while those in the prewarming group were warmed for 10 min before anesthetic induction and during the surgery. The primary outcome was incidence of intraoperative hypothermia.
Results
Intraoperative hypothermia was observed in 73.1% of the patients in the non-prewarming group and 24% of the patients in the prewarming group (P < 0.001). There were significant differences in core temperature changes between the groups (P < 0.001). Postoperative shivering occurred in 8 of the 26 (30.8%) patients in the non-prewarming group and in 1 of the 25 (4.0%) patients in the prewarming group (P = 0.024).
Conclusions
Forced air warming for 10 min before induction on the operating table combined with intraoperative warming was an effective method to prevent hypothermia in patients undergoing gynecologic laparoscopic surgery.

Keyword

Core body temperature; Gynecologic laparoscopic surgery; Perioperative hypothermia; Prewarming

Figure

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  Fig. 1. CONSORT flow diagram of the study.

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  Fig. 2. Mean core body temperature during the perioperative period in the non-prewarming (♦) and prewarming groups (■). Temperatures at the arrival in the operating theater, before induction, and at the arrival in the post-anesthetic care unit (PACU) are tympanic membrane temperatures; temperatures at other time points are esophageal temperatures. Half error bars represent the SD (*P < 0.05).

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