Thermodilution cardiac output--a systematic error.

W B Runciman; A H Ilsley; J G Roberts

doi:10.1177/0310057x8100900206

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PubMed · 7020475

Thermodilution cardiac output--a systematic error.

W B Runciman·A H Ilsley·J G Roberts

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Abstract

The purpose of this study was to examine the mechanism and magnitude of a systematic error in thermodilution cardiac output measurement. One hundred and seventy-one thermodilution cardiac output measurements in dogs using a Swan-Ganz catheter were compared with simultaneously made dye dilution measurements under different conditions over a wide range of cardiac outputs. A systematic error with the thermodilution technique was confirmed and was almost identical to that observed in the literature. It is proposed that its mechanism is loss of thermal indicator between the injectate orifice and detection. Application of a further correction factor for thermal indicator loss is suggested.

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Animals Cardiac Catheterization Cardiac Output Dogs Dye Dilution Technique Indocyanine Green Mathematics Models, Biological Regression Analysis Thermodilution Comparative Study Journal Article

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W B Runciman, A H Ilsley, J G Roberts. 1981. Thermodilution cardiac output--a systematic error.. https://doi.org/10.1177/0310057x8100900206

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