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Does gastric tonometry work? No

E Benjamin1, J M Oropello

  • 1Department of Surgery, Mount Sinai Medical Center, City University of New York, New York, USA.

Critical Care Clinics
|July 1, 1996
PubMed
Summary
This summary is machine-generated.

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Gastrointestinal tonometry aims to detect gut hypoxia but is unreliable. The method is affected by factors unrelated to oxygenation, making it a poor indicator of visceral oxygen status.

Area of Science:

  • Critical care medicine
  • Gastroenterology
  • Physiology

Background:

  • Gastrointestinal tonometry is a technique used to assess gut mucosal hypoxia.
  • It relies on gastric luminal PCO2 and arterial bicarbonatemia within a modified Henderson-Hasselbach equation.

Purpose of the Study:

  • To review the inherent problems and limitations of gastrointestinal tonometry.
  • To evaluate the accuracy of tonometry in diagnosing gut mucosal hypoxia.

Main Methods:

  • Review of existing literature and underlying assumptions of gastrointestinal tonometry.
  • Analysis of factors influencing tonometry readings, including local and systemic variables.

Main Results:

  • Tonometry is influenced by local factors and systemic acid-base imbalances unrelated to oxygenation.

Related Experiment Videos

  • The technique is a crude and cumbersome method for gut capnometry.

    • Conclusions:

    • Gastrointestinal tonometry provides questionable information regarding visceral oxygenation.
    • Gut capnometry may offer insights into visceral perfusion but not definitively oxygenation.