octanoic acid breath test

octanoic acid breath test

a breath test for gastric emptying. The patient is administered a test meal containing octanoic acid labeled with carbon 13, and the breath is assessed at intervals for levels of labeled carbon dioxide; excessive carbon dioxide is seen when gastric emptying is inadequate.
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Twenty-two of these patients (73 percent) had normal gastric emptying and eight (27 percent) had delayed gastric emptying (t1/2 octanoic acid breath test >109 min, which is a measurement of how much time it takes for half the food to leave the stomach; up to 108 minutes is normal).
Measurement of gastric emptying rate of solids by means of a carbon-labeled octanoic acid breath test.
13]C] octanoic acid breath tests, where calculation of the gastric emptying parameters by nonlinear regression analysis was based on [sup.