Br J Anaesth. 1992 May;68(5):499-502.

Gastroduodenal dysfunction as a cause of gastric bacterial overgrowth in patients undergoing mechanical ventilation of the lungs.

Inglis TJ, Sproat LJ, Sherratt MJ, Hawkey PM, Gibson JS, Shah MV.

Source

Department of Microbiology, University of Leeds, West Yorkshire.

Abstract

We have studied 15 patients undergoing mechanical ventilation of the lungs for evidence of a relationship between gastroduodenal dysfunction and gastric bacterial overgrowth. Duodenal reflux was detected by quantitative measurement of conjugated bilirubin in gastric aspirate specimens. The pH and bacterial content of these specimens were analysed. A minority of specimens with pH less than 3.5 contained measurable numbers of viable bacteria. The total bacterial count and the count of Gram negative bacteria correlated significantly with specimen pH in both cases (P less than 0.001, in both). In the 72 specimens of gastric aspirate with pH greater than 3.5, the presence of Gram negative bacteria was associated significantly with detectable bilirubin (P less than 0.001). The total bacterial count was greater also in specimens containing bilirubin (P = 0.009). These results suggest that gastroduodenal dysfunction may promote gastric bacterial overgrowth, contributing to the development of ventilator-associated pneumonia.

Comment in

Br J Anaesth. 1992 Nov;69(5):545.

PMID:: 1642939; [PubMed - indexed for MEDLINE]

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Research Support, Non-U.S. Gov't

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Bilirubin

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