Effect of Intraoperative Active Warming Initiated at Anesthesia Induction on Core Temperature, Postoperative Pain and Agitation in Laparoscopic Cholecystectomy: A Randomized Controlled Trial
Abstract
Background and Objectives: Inadvertent perioperative hypothermia is a common and clinically significant complication during laparoscopic surgery, leading to pain, agitation, shivering, and delayed recovery. This randomized controlled trial evaluated the effect of peri-induction active warming with an electric resistive blanket on postoperative pain and agitation—the primary outcomes—compared with passive insulation. Materials and Methods: This study was registered at ClinicalTrials.gov (Identifier: NCT06022926; date of registration: 15 August 2023) prior to the enrollment of the first patient. One hundred and thirty-two American Society of Anesthesiologists I–II adults undergoing laparoscopic cholecystectomy were randomly allocated (1:1) to two groups: one received active warming with a resistive carbon fiber underbody blanket (Group 1), and the other received passive insulation (Group 2). The tympanic core temperature was measured at four perioperative time points (TT1–TT4). Postoperative agitation (Riker Sedation–Agitation Scale, RSAS) and pain (Numerical Rating Scale, NRS) were assessed 20 min after extubation in the post-anesthesia care unit (PACU). Secondary outcomes included intraoperative and postoperative temperature, postoperative shivering, adverse events (bradycardia, tachycardia, hypotension, hypertension, postoperative nausea and vomiting, and respiratory depression), and the PACU length of stay. Results: Baseline core temperatures (TT1) were similar between the…
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Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design.
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