Anästhesiol Intensivmed Notfallmed Schmerzther 1998; 33: S74-S77
DOI: 10.1055/s-2007-994881
Methodische Aspekte

© Georg Thieme Verlag Stuttgart · New York

Gastrointestinal Tonometry: Methodological Considerations with Use of Fluid and Air

J. J. Kolkman1 , J. A. Otte1 , A. B. J. Groeneveld2
  • 1Department of internal medicine, Medical Spectrum Twente, Enschede and
  • 2Medical Intensive Care Unit, Free University, Amsterdem, the Netherlands
Further Information

Publication History

Publication Date:
22 January 2008 (online)

Abstract

Methodological aspects of gastrointestinal tonometry are reviewed. First, we will discuss the relation between ischemia of the gastrointestinal tract and PCO2 and pHi and the influence of acid suppression and food intake on PiCO2. Thereafter we will focus on the sources of error when using fluid filled tonometers for PiCO2 assessment. Blood gas analyzer bias, dead space effects, precision, speed of measurement and the potentially large accidental errors will be discussed. Finally, the potential advantages of air tonometry will be mentioned.

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