Effect of 10 Minute-prewarming on Core Body Temperature During Gynecologic Laparoscopic Surgery Under General Anesthesia

Effect of 10 Minute-prewarming on Core Body Temperature During Gynecologic Laparoscopic Surgery Under General Anesthesia

Previous research has shown beneficial effects of prewarming on preventing inadvertent perioperative hypothermia (IPH). Warming the surface of the body before the induction of anesthesia can reduce the temperature difference between the core and periphery, thereby reducing the degree of core-to-peripheral thermal redistribution. It has been proved that initiation of warming before surgery can be more useful for preventing IPH than warming only during surgery. Nevertheless, there are not many researches on effects of short period (<30 min) prewarming, especially in gynecologic laparoscopic surgery. Accordingly, the investigators designed this study to test if IPH can be effectively prevented when 10 minutes of prewarming is added to intraoperative active warming in patients undergoing gynecologic laparoscopic surgery.

Inclusion Criteria:

• ASA physical status 1 or 2 patients
• patients who underwent gynecologic laparoscopic surgery under general anesthesia

Exclusion Criteria:

• preexisting hypothermia (<36℃) or hyperthermia (>37.5℃)
• anesthesia last for <1 hour or >2 hours
• conversion from laparoscopic surgery to laparotomy
• patients with a body mass index (BMI) ≥ 31kg/m2
• patients with known thyroid disease