Quantitative detection of atropine-delayed gastric emptying in the horse by the 13C-octanoic acid breath test.

This research article explores the efficacy of using the 13C-octanoic acid breath test to quantitatively measure delayed gastric emptying time in horses. The research shows that this method, usually a noninvasive diagnostic tool, has been found effective and correlates significantly with radioscintigraphy, traditionally used for similar measurements.

Research Objectives

• The primary aim of this research paper is to assess the accuracy and effectiveness of the 13C-octanoic acid breath test for measuring delayed gastric emptying time in horses. This is achieved by contrasting this method with the more traditional radioscintigraphy technique.
• The researchers also desired to validate the clinical application of this technique by using a model of atropine-induced gastroparesis.

Methodology

• The study undertook measurements twice on eight horses. These horses were treated intravenously either with atropine or saline, in a random order, to induce gastroparesis – a delayed gastric emptying condition.
• Both radioscintigraphy and the 13C-octanoic acid breath test were concurrently utilized to measure the gastric emptying rate of these treated horses. The results of both sets of measurements were then analyzed.

Findings

• Analysis showed that treatment with atropine had caused a significant delay in the gastric emptying rate.
• Furthermore, the breath test data demonstrated an atropine-induced delay in the gastric half-emptying time (t 1/2), with no overlap within the 99% confidence interval range (P < 0.001).
• Significant correlations were found between scintigraphy and the 13C-octanoic acid breath test calculations of both the t 1/2 period and the lag phase duration (P < 0.05).
• The mean bias of the breath test t 1/2 compared with scintigraphy was 1.78 (0.58) hours.

Conclusion and Implications

• Overall, the findings indicate the 13C-octanoic acid breath test is an effective diagnostic tool for measuring equine delayed gastric emptying.
• This technique offers several advantages over established methods, as it is non-invasive, doesn’t involve radioactivity, provides quantitative data, and requires minimal equipment or specialized training to perform.
• The research’s positive results suggest potential for broader clinical application of this technique for similar diagnostics.