BACKGROUND Preventing the frequent perioperative hypothermia incidents that occur during elective caesarean deliveries would be beneficial. This trial aimed at evaluating the effect of preoperative forced-air warming alongside perioperative intravenous fluid warming in women undergoing cesarean sections under spinal anesthesia. METHODS We randomly allocated 135 women undergoing elective cesarean deliveries to either the intervention group (preoperative forced-air and intravenous fluid warming, n = 69) or the control group (no active warming, n = 66). The primary outcome measure was the core temperature change between groups from baseline to the end of the surgical procedure. Secondary outcomes included thermal comfort scores, the incidences of shivering and hypothermia (< 36 °C), the core temperature on arrival at the post-anesthesia care unit, neonatal axillary temperature at birth, and Apgar scores. RESULTS Two-way repeated measures ANOVA revealed significantly different core temperature changes (from the pre-spinal temperature to that at the end of the procedure) between groups (F = 13.022, P < 0.001). The thermal comfort scores were also higher in the intervention group than in the control group (F = 9.847, P = 0.002). The overall incidence of perioperative hypothermia was significantly lower in the intervention group than in the control group (20.6% vs. 51.6%, P < 0.0001). CONCLUSIONS Warming preoperative forced-air and perioperative intravenous fluids may prevent maternal hypothermia, reduce maternal shivering, and improve maternal thermal comfort for patients undergoing cesarean sections under spinal anesthesia. TRIAL REGISTRATION The study was registered with the Chinese Clinical Trial Registry (registration number: ChiCTR1800019117) on October26, 2018.

中文翻译：

---

术前加温预热和围手术期加温静脉输液对剖宫产妇产妇温度的影响：一项前瞻性，随机，对照临床试验。

背景技术防止在选择性剖腹产期间频繁发生的围手术期低温事件将是有益的。该试验旨在评估在麻醉下进行剖宫产的妇女术前强制通气和围手术期静脉补液的效果。方法我们将135例行选择性剖宫产的妇女随机分配至干预组（术前强制空气和静脉输液加温，n = 69）或对照组（无主动加温，n = 66）。主要结果指标是各组之间从基线到手术结束的核心温度变化。次要结果包括热舒适度评分，发抖和体温过低（<36°C）的发生率，到达麻醉后监护室时的核心温度，新生儿出生时的腋窝温度和Apgar评分。结果双向重复测量ANOVA显示两组之间的核心温度变化（从脊柱前温度到手术结束时的温度）显着不同（F = 13.022，P <0.001）。干预组的热舒适评分也高于对照组（F = 9.847，P = 0.002）。干预组围手术期低温的总发生率显着低于对照组（20.6％比51.6％，P <0.0001）。结论术前在脊髓麻醉下进行剖宫产的患者，术前使用强制通气和围手术期静脉补液可以预防产妇体温过低，减少产妇发抖，改善产妇的热舒适度。