ArticleAnnals of biomedical engineering2026
A Pressure Difference-Based Strategy for Blood Oxygen Control in Membrane Oxygenators: Reduced Modeling, Computational Simulation, and Exploratory In Vivo Evaluation.
Article in Annals of biomedical engineering, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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10 authors.
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Abstract
purposeThis study investigated whether blood oxygenation in a membrane oxygenator can be regulated by modulating the gas-blood pressure difference.
methodsThis study combined theoretical analysis, reduced computational simulation, and exploratory in vivo animal testing. A conceptual three-compartment framework based on Dalton's law, Fick's law, Henry's law, and the Hill equation was used to organize the main oxygen transfer pathway from the gas phase to plasma and red blood cells. For numerical analysis, this conceptual framework was reduced to a steady-state lumped oxygen balance model to assess how outlet blood oxygenation varies with gas-blood pressure difference and gas-to-blood flow ratio. Key trends were further examined in a rabbit ECMO circuit under different gas-side and blood-side operating pressures.
resultsThe reduced simulations showed that post-oxygenator blood oxygen partial pressure depended strongly on both gas-blood pressure difference and gas-to-blood flow ratio. Under ambient air, simulated outlet
conclusionTheoretical analysis, reduced simulation, and exploratory animal results support the feasibility of pressure difference-based oxygenation control in membrane oxygenators. Substantial oxygenation may be achieved with ambient air when the gas-to-blood flow ratio is adequate. The present model should be interpreted as a trend-level reduced mechanistic framework rather than a quantitatively validated subject-specific predictor. Future work should include absolute pressure-based analysis, explicit carbon dioxide transport modeling, parameter identification using larger datasets, and larger-scale in vivo evaluation.
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