Influence of Non-Compressible Versus Compressible Underbody Forced-Air Warming Systems on Core Temperature in Off-Pump Cardiac Surgery

Olav Rösler; Farhad Bakhtiary; Christian Bode; Mark Coburn; Markus Velten; Florian Piekarski

doi:10.1053/j.jvca.2025.12.009

December 14, 2025Journal of Cardiothoracic and Vascular AnesthesiaOpen Access

Influence of Non-Compressible Versus Compressible Underbody Forced-Air Warming Systems on Core Temperature in Off-Pump Cardiac Surgery

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Key Points

To compare intraoperative core body temperature maintenance using non-compressible versus compressible underbody forced-air warming systems during off-pump cardiac surgery.
Retrospective single-center before-after cohort study evaluated 100 adult patients undergoing off-pump coronary revascularization between May 2021 and July 2023.
Patients received underbody warming with either compressible (n=49) or non-compressible (n=51) forced-air blankets at 43°C, combined with warmed intravenous fluids and prewarming.
Core body temperature was recorded via bladder thermistor, and baseline differences were balanced using propensity score overlap weighting.
Maximum negative deviation from baseline temperature (ΔTneg) was median -0.40°C (IQR: -0.75 to 0.00) in the non-compressible group versus -0.50°C (IQR: -1.10 to -0.10) in the compressible group, yielding a Hodges-Lehmann median difference of -0.10°C (95% CI: -0.40 to 0.10; p = 0.23).
Propensity score-weighted multivariable regression revealed baseline temperature as the sole independent predictor of ΔTneg (β = -0.36, p = 0.002), whereas warming blanket type had no significant effect (β = -0.07, p = 0.62).

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Implication

Retrospective cohort study finds similar core temperature stability with compressible versus non-compressible underbody warming in cardiac surgery, indicating equivalent thermal efficacy.

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Rösler et al. (2025) studied this question.

synapsesocial.com/papers/6a1a9973739ab56a9085b686 https://doi.org/10.1053/j.jvca.2025.12.009

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Influence of Non-Compressible Versus Compressible Underbody Forced-Air Warming Systems on Core Temperature in Off-Pump Cardiac Surgery

Key Points

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Implication

Discussion

Cite This Study

Influence of Non-Compressible Versus Compressible Underbody Forced-Air Warming Systems on Core Temperature in Off-Pump Cardiac Surgery

Key Points

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Implication

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Cite This Study

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