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- W2321850460 abstract "The application of positive end expiratory pressure (PEEP) in mechanically ventilated (MV) patients with acute respiratory distress syndrome (ARDS) decreases cardiac output (CO). Accurate measurement of CO is invasive and is not ideal for all MV critically ill patients. However, the link between the PEEP used in MV, and CO provides an opportunity to assess CO via MV therapy and other existing measurements, creating a non-invasive CO measure. This paper examines combining models of diffusion resistance with lung mechanics, to help predict CO changes due to PEEP. The CO estimator uses an initial measurement of pulmonary shunt, and estimations of shunt changes due to PEEP to predict CO at different levels of PEEP. Inputs to the cardiac model are the PV loops from the ventilator, as well as the oxygen saturation values using known respiratory inspired oxygen content. The output is estimates of pulmonary shunt and CO changes due to changes in applied PEEP. Data from two published studies are used to assess and initially validate this model. The model shows the effect on oxygenation due to decreased CO and decreased shunt, resulting from increased PEEP. It concludes that there is a trade off on oxygenation parameters. More clinically importantly, the model also looks at how the rate of CO drop with increased PEEP may also be used as a method to determine optimal PEEP, and optimise MV therapy with respect to the gas exchange achieved, while also accounting for its impact on cardiovascular system management." @default.
- W2321850460 created "2016-06-24" @default.
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- W2321850460 date "2010-01-01" @default.
- W2321850460 modified "2023-09-26" @default.
- W2321850460 title "Prediction of cardiac output changes with response to PEEP on patients under mechanical ventilation" @default.
- W2321850460 doi "https://doi.org/10.1049/ic.2010.0428" @default.
- W2321850460 hasPublicationYear "2010" @default.
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