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Automatic noninvasive sphygmomanometry in horses.

W W Muir, A Wade, B Grospitch

    Journal of the American Veterinary Medical Association
    |June 1, 1983
    PubMed
    Summary
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    Indirect oscillometric blood pressure measurements in horses show good correlation with direct arterial methods, especially at lower heart rates. However, arrhythmias or hypotension can limit measurement accuracy in some equine patients.

    Area of Science:

    • Veterinary Medicine
    • Equine Physiology
    • Cardiovascular Monitoring

    Background:

    • Accurate cardiovascular monitoring is crucial in horses.
    • Indirect blood pressure measurement techniques offer a less invasive alternative to direct arterial catheterization.
    • The oscillometric method is a common indirect technique, but its validation in horses requires further investigation.

    Purpose of the Study:

    • To evaluate the accuracy of an indirect automatic oscillometric technique for measuring systolic, diastolic, and mean arterial blood pressures and heart rate in horses.
    • To compare oscillometric measurements with direct arterial measurements obtained via facial or dorsal metatarsal artery cannulation.

    Main Methods:

    • Systolic, diastolic, and mean arterial blood pressures and heart rate were measured in 73 horses using an indirect automatic oscillometric device.

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  • Direct arterial blood pressure and heart rate data were obtained through cannulation of the facial or dorsal metatarsal arteries.
  • Data from both methods were compared for correlation.

    • Main Results:

    • Good correlation was observed between direct and indirect blood pressure and heart rate measurements when horses had a low heart rate and the high sensitivity setting was used.
    • Oscillometric measurements could not be obtained in 9 (12%) horses due to cardiac arrhythmias or hypotension.

    Conclusions:

    • The indirect automatic oscillometric technique can provide reliable blood pressure and heart rate measurements in horses, particularly when heart rate is low.
    • The presence of cardiac arrhythmias or hypotension may limit the applicability of this non-invasive method in certain clinical situations.