Thermodilution cardiac output - A systematic error

W. B. Runciman, A. H. Ilsley, J. G. Roberts

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)135-139
Number of pages5
JournalAnaesthesia and Intensive Care
Issue number2
Publication statusPublished or Issued - 1981
Externally publishedYes

ASJC Scopus subject areas

  • Critical Care and Intensive Care Medicine
  • Anesthesiology and Pain Medicine

Cite this