Randomized Prospective Comparison of Forced Air Warming Using Custom-Made Blankets from Disposable Surgical Gown Versus Commercial Blankets in Patients Undergoing Intra-abdominal Surgery: Non-inferiority Trial
Abstract
Objective: This study was to compare the efficacy of forced air warming using custom-made blankets (from disposable surgical gown) and commercial blankets in patients undergoing intra-abdominal surgery
Materials and methods: This was randomized prospective, non-inferiority trial. Sixty-nine adult patients undergoing elective intra-abdominal surgery under general anesthesia were studied. Patients were randomized to receive forced air warming at temperature set point 38°C using commercial blankets (Medwarmer-upper blanket model, control group, n=35) or custom-made blankets (from disposable surgical gown, experimental group, n=34). Intraoperative nasopharyngeal core temperature was monitored. In recovery room, patients were monitored axillary temperature. Shivering and signs of thermal injury were observed.
Results: Custom-made blanket was not inferior to commercial blanket in mean final core temperature. Final core temperature at the end of surgery was similar between groups: experimental, 36.52±0.44°C; control, 36.44±0.57 °C (absolute difference 0.08 °C, 95%CI -0.33, 0.17).There were 9 of 35 patients (25.71%) in control group and 5 of 34 patients (14.71%) in experimental groups had core temperature less than 36°C (p=0.26). In recovery room, axillary temperature at 10, 30, 60 minutes was similar between groups. Thermal injury was not found.
Conclusion: The efficacy of forced air warming using custom-made blanket was not inferior to commercial blanket. The advantages of custom-made blanket compared to commercial blanket are reducing waste product, recycling and cost saving.
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