| Repeatability, Reproducibility, and Effect of Head Position on Central Venous Pressure Measurement in Standing Adult Horses. | |
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MedLine Citation:
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PMID: 21434999 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Background: Central venous pressure (CVP) is a used as an estimation of intravascular volume status in various species. Techniques for measuring CVP in horses have been described, but the repeatability of these readings at a single time point or over time has not been established. Hypothesis: That CVP measurements in healthy adult horses would be repeatable at each time point, that these readings would be reproducible over time, and that alteration in head position relative to the heart would alter CVP. Animals: Ten healthy adult research horses. Methods: In an experimental study, horses were instrumented with a central venous catheter. Readings were taken in triplicate q6h for 2 days by water manometry, and twice daily with the head in neutral, elevated, and lowered positions by electronic manometry. Results: Variation in the "neutral" measurements obtained at each time point was <0.1 ± 1.0 cmH(2) O (P= .718). There was a significant decrease in CVP over time (P= .015), which was eliminated when results were controlled for acute decrease in body weight of -1.35% (presumed hypohydration because of lack of acclimatization and decreased water intake). Head height had a significant and directional effect on CVP in that the elevated head position decreased CVP -2.0 ± 6.5 cmH(2) O (P < .001) while the lowered head position increased CVP by 3.7 ± 5.5 cmH(2) O (P < .001). Conclusions and Clinical Importance: CVP values obtained by water manometry were repeatable in adult horses, but were reproducible only when controlled for changes in hydration. Care should be taken to maintain consistency in head position to prevent erroneous readings. |
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Authors:
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J L Norton; R D Nolen-Walston; C Underwood; R Boston; J Slack; B L Dallap |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-24 |
Journal Detail:
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Title: Journal of veterinary internal medicine / American College of Veterinary Internal Medicine Volume: - ISSN: 1939-1676 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8708660 Medline TA: J Vet Intern Med Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 by the American College of Veterinary Internal Medicine. |
Affiliation:
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Department of Clinical Studies, New Bolton Center, University of Pennsylvania, Kennett Square, PA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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