Articles Vol. 67 No. 4 25/04/2026

EFFECTIVENESS OF MECHANICAL WARMING IN PREVENTING INTRAOPERATIVE HYPOTHERMIA AND POSTOPERATIVE SHIVERING IN LUMBAR SPINE SURGERY: A RANDOMIZED CONTROLLED TRIAL

Vu Hoang Phuong1,2, Tran Hong Duc1,2, Do The Quyen, Dao Thi Huyen Trang, Nguyen Van Chung2,3, Dinh Thi Anh Van2,3, Nguyen Thuy Trang1,2
1 Hanoi Medical University Hospital
2 Bệnh viện Đại học Y Hà Nội
3 trangnt.tta@gmail.com
DOI: 10.52163/yhc.v67i4.4896
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Keywords
Perioperative hypothermia, active warming, spinal surgery, general anesthesia.
Abstract

Objective: To evaluate the effectiveness of mechanical warming methods in preventing perioperative hypothermia in patients undergoing lumbar spine surgery.

Methods: A prospective cohort study was conducted at Hanoi Medical University Hospital from February 2025 to February 2026 on 80 patients aged ≥ 18 years old, ASA physical status I-III, undergoing lumbar spine surgery under general anesthesia with a duration ≥ 120 minutes. The warming group received active warming with a heating mattress and warmed intravenous fluids, while the non-warming group was covered with standard surgical blankets only. Core body temperature was measured at study time points.

Results: Core temperatures at all measured time points were significantly higher in the warming group compared to the non-warming group (p < 0.05). The incidence of hypothermia in the warming group was 17.5%, significantly lower than 57.5% in the non-warming group (p < 0.001). All cases of hypothermia were mild. The proportion of patients without postoperative shivering was higher in the warming group (90%) than in the non-warming group (42.5%). The time to temperature recovery was shorter in the warming group (2.3 ± 8.00 minutes) compared to the non-warming group (24.8 ± 23.4 minutes) (p < 0.001).

Conclusion: Mechanical warming is an effective method for preventing perioperative hypothermia in patients undergoing spinal surgery, contributing to improved patient safety and quality of care.

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