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PloS one2019; 14(10); e0223705; doi: 10.1371/journal.pone.0223705

Intrabladder pressure as predictor of intra-abdominal pressure in horses.

Abstract: To investigate effects of postural changes and bladder distention on intrabladder pressure whilst estimating intra-abdominal pressure in horses. Two-year cohort study. Patients admitted for elective surgical procedures unrelated to gastrointestinal or genitourinary tract. School of Agricultural and Veterinarian Sciences, Jaboticabal, SP, Brazil. 20 adult horses, 11 males (stallions and geldings) and 9 females; between 3.5 and 12 years, weighing 350 to 500 kg. Intra-abdominal pressure was directly-recorded through abdominocentesis at the ventral midline with a fluid-filled system. Intrabladder pressure was obtained from a bladder catheter with the fluid-filled system zeroed at the level of the tuber ischia with patients in dorsal recumbency or pubic symphysis if in lateral recumbency. Body position directly influenced intra-abdominal pressure. In dorsal recumbency, intra-abdominal pressure differed (p < 0.05) from intrabladder pressure at end-inspiration and end-expiration regardless of whether the bladder was empty or distended. There was no correlation nor association between the two pressures in this body position. In lateral recumbency a difference (p <0.05) between intra-abdominal pressure and intrabladder pressure was recorded at end-inspiration with the bladder distended with 25 ml, and at end-expiration for distension volumes of 25 ml and 50 ml. There was a strong correlation between both pressures for left and right lateral recumbency, regardless of the distension volume. Ordinary least product (OLP) regression analysis showed no fixed or proportional bias between both pressures for distension volume of 50 ml, at both end-inspiration and end-expiration. Indirect assessment of equine intra-abdominal pressure cannot be made in dorsal recumbency. For that purpose, patients should be in left lateral recumbency with the bladder distended with 50 ml. Values can be recorded at end-inspiration or end-expiration. Occlusion of the catheter tip by the bladder wall when minimally distended.
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Publication Date: 2019-10-10 PubMed ID: 31600317PubMed Central: PMC6786750DOI: 10.1371/journal.pone.0223705Google Scholar: Lookup
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  • Journal Article
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  • Non-U.S. Gov't

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This study examines the effects of body position on the intrabladder pressure and its potential as an estimator of intra-abdominal pressure in horses undergoing unrelated surgical procedures.

Research Context

  • The research was a two-year cohort study conducted at the School of Agricultural and Veterinarian Sciences, Jaboticabal, SP, Brazil on 20 adult horses, composed of both males (stallions and geldings) and females that ranged in age from 3.5 to 12 years and weighed between 350 to 500 kg.

Methodology

  • The intra-abdominal pressure was directly recorded via abdominocentesis at the ventral midline by using a fluid-filled system.
  • Meanwhile, intrabladder pressure was determined from a bladder catheter with the fluid-filled system zeroed at the level of the tuber ischia while the patients were in dorsal recumbency, or pubic symphysis if they were in lateral recumbency.

Findings

  • Directional recumbency (the position of the horse laying flat on its back) influences intra-abdominal pressure. In this position, the intra-abdominal pressure was found to statistically differ from intrabladder pressure regardless of whether the bladder was empty or distended.
  • In dorsal recumbency, no correlation or association was found between intra-abdominal pressure and intrabladder pressure.
  • A difference between intra-abdominal pressure and intrabladder pressure was observed in lateral recumbency (the position of the horse laying on its side) at end-inspiration with the bladder distended with 25 ml, and at end-expiration for distension volumes of 25 ml and 50 ml.
  • In lateral recumbency, a strong correlation was established between both pressures, irrespective of the bladder distension volume.
  • Ordinary least product (OLP) regression analysis showed no fixed or proportional bias between both pressures for a distension volume of 50 ml, at both end-inspiration and end-expiration.

Implications

  • The findings of this study suggest that equine intra-abdominal pressure cannot be indirectly assessed in dorsal recumbency. For this purpose, horses should be in left lateral recumbency and have the bladder distended with 50 ml, with measurements taken at both end-inspiration and end-expiration.
  • Overall, the study advances our understanding of how to measure intra-abdominal pressures in horses, which can be vital information for equine medical interventions, potentially guiding treatment options or surgical procedures.

Cite This Article

APA
de Paula VB, Canola PA, Rivera GG, Z Filho D, Amaral GPD, Ferraz GC, Ferraudo AS, Canola JC. (2019). Intrabladder pressure as predictor of intra-abdominal pressure in horses. PLoS One, 14(10), e0223705. https://doi.org/10.1371/journal.pone.0223705

Publication

PloS one
ISSN: 1932-6203
NlmUniqueID: 101285081
Country: United States
Language: English
Volume: 14
Issue: 10
Pages: e0223705
PII: e0223705

Researcher Affiliations

de Paula, Vanessa B
  • Graduate Program in Veterinary Surgery, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, SP, Brazil.
Canola, Paulo A
  • Department of Veterinary Medicine and Surgery, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, SP, Brazil.
Rivera, Gabriela G
  • Graduate Program in Veterinary Surgery, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, SP, Brazil.
Z Filho, Dárcio
  • Graduate Program in Veterinary Surgery, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, SP, Brazil.
Amaral, Gabriel P D
  • Residency Program in Large Animal Surgery, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, SP, Brazil.
Ferraz, Guilherme C
  • Department of Animal Morphology and Physiology, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, SP, Brazil.
Ferraudo, Antônio S
  • Department of Exact Sciences, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, SP, Brazil.
Canola, Júlio C
  • Department of Veterinary Medicine and Surgery, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, SP, Brazil.

MeSH Terms

  • Abdomen / physiology
  • Animals
  • Elective Surgical Procedures
  • Female
  • Horses / physiology
  • Male
  • Multivariate Analysis
  • Posture
  • Pressure
  • Regression Analysis
  • Urinary Bladder / physiology

Conflict of Interest Statement

The authors have declared that no competing interests exist.

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Citations

This article has been cited 1 times.
  1. Trimmel NE, Podgoršak A, Oertel MF, Jucker S, Arras M, Schmid Daners M, Weisskopf M. The Sheep as a Comprehensive Animal Model to Investigate Interdependent Physiological Pressure Propagation and Multiparameter Influence on Cerebrospinal Fluid Dynamics. Front Neurosci 2022;16:868567.
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