HIỆU QUẢ DỰ PHÒNG HẠ THÂN NHIỆT CỦA PHƯƠNG PHÁP SƯỞI ẤM CHỦ ĐỘNG TRƯỚC PHẪU THUẬT LỚN VÙNG BỤNG

Abstract

Purpose: To compare the incidence and severity of hypothermia, as well as the time and rate of postoperative rewarming in patients undergoing major abdominal surgery when applying preoperative active warming using a forced-air warming device combined with a cotton blanket versus passive insulation with only a cotton blanket in the preoperative area. Materials and methods: This was a non-randomized controlled clinical trial involving 60 patients undergoing elective major abdominal surgery lasting over 120 minutes at the University Medical Center Ho Chi Minh City from November 2024 to May 2025. Patients were divided into two groups: the control group (n = 30) received passive warming with a cotton blanket, while the intervention group (n = 30) received active warming using a forced-air warming device combined with a cotton blanket for 10–30 minutes in the preoperative area. Tympanic temperature was measured using an infrared tympanic thermometer throughout the perioperative period. Results: The incidence of hypothermia in the intervention group was 30%, significantly lower than 63.3% in the control group (p < 0.01). All hypothermic cases were classified as mild, with no cases of moderate or severe hypothermia were recorded. The mean intraoperative core temperatures at all time points after anesthesia induction until the end of surgery were consistently higher in the intervention group (p < 0.01). Additionally, the intervention group demonstrated a faster rewarming rate and a shorter rewarming time in the post-anesthesia care unit with no postoperative shivering observed (0% versus 25% in the control group). Conclusion: Preoperative active warming using a forced-air device combined with a cotton blanket is effective in reducing the incidence and severity of intraoperative hypothermia, maintaining stable intraoperative core temperature and improving postoperative thermal recovery.