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Is the cardiac output obtained from a Swan-Ganz catheter always zero?



Is the cardiac output obtained from a Swan-Ganz catheter always zero?



Journal of Clinical Monitoring and Computing 22(6): 431-433



By means of a Swan-Ganz catheter cardiac output is calculated using the Stewart-Hamilton thermodilution equation. Assuming the body as a thermally isolated inert system, this equation theoretically always results in zero cardiac output. Using the first and second law of thermodynamics together with a few lines simple analysis this statement is proven. It is at least a necessary condition for the application of the Stewart-Hamilton equation, that core body temperature is kept constant in a thermo- regulatory steady state.

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Accession: 053999779

Download citation: RISBibTeXText

PMID: 19009363

DOI: 10.1007/s10877-008-9149-5


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