Abstract
Gastrointestinal luminal tonometry is a minimally invasive monitoring technique for critically ill patients. It is not widely accepted yet, possibly because of uncertainties with respect to physiologic background, methodology, and clinical usefulness. This review discusses recent developments, including automated air tonometry, that might render tonometry easier to apply by replacing the laborious and error-prone manual saline technique, the value of the blood-intragastric PCO2 gap versus the intramucosal pH, the need for gastric acid suppression during tonometry in the stomach, the sources of error for fluid PCO2 tonometry, and the luminal PCO2 in parts of the gastrointestinal tract other than the stomach. Finally, new clinical investigations are reviewed.
Published Version
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