• Der Anaesthesist · Jan 1990

    Comparative Study

    [Continuous measurement of cardiac output based on the Fick principle in cardiac anesthesia].

    • H Rieke, A Weyland, A Hoeft, W Weyland, H Sonntag, and S Breme.
    • Zentrum Anaesthesiologie der Georg-August-Universität Göttingen.
    • Anaesthesist. 1990 Jan 1;39(1):13-21.

    AbstractWith the development of fiberoptic and pulse oximetry, as well as the development of the more modern methods of oxygen consumption measurements, the online monitoring of Fick cardiac (FCO) output has become possible in the clinical treatment routine. The aim of this study was to compare fiberoptically measured mixed venous oxygen saturation with values from blood samples and continuously determined Fick cardiac output with intermittent thermodilution cardiac output (TCO). Ten patients undergoing coronary artery bypass grafting were measured during the perioperative period. Total body oxygen consumption was determined with a metabolic monitor (Deltatrac Datex) from respiratory gases. Arterial oxygen saturation was assessed by pulse oximetry (Nellcor). Mixed venous oxygen saturation was measured by a balloon tipped pulmonary artery fiberoptic catheter (Opticath) attached to an electronic device based on three wavelengths (Oximetrix cardiac output monitor). Hemoglobin, Methemoglobin and CO-hemoglobin were determined from intermittent blood samples by in vitro analysis. FCO was calculated from corresponding differences in arterial mixed venous oxygen and total body oxygen consumption. TDCO values were calculated from microcomputer recordings of the thermodilution data by monoexponential curve-fitting with respect to baseline drift. A significant systematic difference between FCO and TCO was observed. FCO exceeded TCO on average by 0.42 +/- 0.12 l/min. The limits of confidence (95%) were 0.18 to 0.66 l/min. There was no systematic difference between mixed venous saturation measurements with the fiberoptic system and from blood samples. The cardiac output values derived from fiberoptic and pulse oximetry can be considered sufficiently reliable for clinical purposes.(ABSTRACT TRUNCATED AT 250 WORDS)

      Pubmed     Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…