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Related Experiment Videos

Equine esophageal pressure profile.

J A Stick, F J Derksen, D L McNitt

    American Journal of Veterinary Research
    |February 1, 1983
    PubMed
    Summary

    This study mapped equine esophageal motility, identifying distinct pressure regions and sphincters. Findings establish a baseline pressure profile for healthy horse esophagus function.

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    Area of Science:

    • Veterinary Medicine
    • Gastroenterology
    • Equine Physiology

    Background:

    • Understanding esophageal motility is crucial for diagnosing equine gastrointestinal disorders.
    • Previous studies have not fully characterized the pressure dynamics and regional variations in the equine esophagus.

    Purpose of the Study:

    • To investigate and quantify esophageal motility in healthy adult horses.
    • To identify and characterize distinct functional regions within the equine esophagus.
    • To establish a normative pressure profile for equine esophageal function.

    Main Methods:

    • Utilized a 4 side-hole catheter assembly with continuous distilled water perfusion.
    • Measured resting and maximal pressures throughout the entire esophageal length during swallowing.
    • Quantified pressure events, regional lengths, and durations.

    Main Results:

    • Demonstrated four functionally distinct esophageal regions: cranial esophageal sphincter, caudal esophageal sphincter, and "fast" and "slow" regions in the esophageal body.
    • Recorded specific resting pressures for cranial (171.1 ± 20.45 mmHg) and caudal (10.5 ± 0.61 mmHg) sphincters.
    • Measured maximal pressures in the "fast" (63.1 ± 3.75 mmHg) and "slow" (71.9 ± 3.65 mmHg) regions and the caudal sphincter (63.1 ± 2.60 mmHg).

    Conclusions:

    • Established a comprehensive equine esophageal pressure profile.
    • The study provides critical baseline data for equine esophageal motility.
    • Identified key pressure parameters for normal esophageal function in horses.

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