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SHR Neuro Krebs Kardio Lipid Stoffw Microb
Rodriguez-Patarroyo, FA; Wang, L; Teunissen, B; Kurz, A; Sessler, DI.
Heat Loss in Humans Warmed with Various Full-Body Forced-air Heating Systems.
Anesthesiology. 2025;
Doi: 10.1097/ALN.0000000000005730
PubMed
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- Co-Autor*innen der Med Uni Graz
- Kurz Andrea
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- Abstract:
- BACKGROUND: Perioperative hypothermia remains a common and preventable complication. Forced-air warming systems are widely used, but comparative data on their effectiveness are limited. This study aimed to evaluate heat flux, mean skin temperature, and thermal comfort across five full-body forced-air warming blower and cover combinations. METHODS: In a randomized cross-over trial conducted in a controlled clinical setting, 20 healthy volunteers were each warmed for 30 minutes using five different forced-air warming systems in randomized order. A 45-minute washout period separated each warming session. Cutaneous heat flux and area-weighted mean skin temperature were recorded every 5 minutes, and thermal comfort was assessed every 10 minutes. Data were analyzed using repeated-measures ANOVA and linear mixed-effects modeling, with significance defined as P < 0.05. RESULTS: All 20 volunteers completed the trial. Mean age was 29 years, 40% were female, and mean body mass index was 24 kg/m2. Ambient temperature averaged 20.3 ± 2.4°C. Across all warming systems, average heat flux improved from a loss of 101 ± 53 W to a gain of 20 ± 48 W after just 5 minutes of heating. Skin temperature increased to 35.5 ± 0.8°C within 15 minutes of warming, remaining stable thereafter. CONCLUSIONS: All five forced-air warming systems transferred substantial amounts of heat. There were no statistically significant or clinically meaningful differences in cutaneous heat transfer, mean skin temperature, or thermal comfort across the systems. Any of the tested systems will therefore prevent hypothermia in most surgical patients.