Cover Journal of the American Veterinary Medical Association
Journal of the American Veterinary Medical Association
ISSN:
0003-1488
Publication Date:
15 Apr 2019

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Factors associated with postobstructive diuresis following decompressive surgery with placement of ureteral stents or subcutaneous ureteral bypass systems for treatment of ureteral obstruction in cats: 37 cases (2010–2014)

Ingrid M. Balsa DVM1, William T. N. Culp VMD1, Carrie A. Palm DVM2, Kate Hopper BVSc, PhD1, Brian T. Hardy DVM, MS2, Daniel G. Ben-Aderet BS3, Philipp D. Mayhew BVMS1, and Kenneth J. Drobatz DVM, MSCE4
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  • 1 1Department of Surgical and Radiological Sciences, University of California-Davis, Davis, CA 95616.
  • | 2 2Department of Medicine and Epidemiology, University of California-Davis, Davis, CA 95616.
  • | 3 3School of Veterinary Medicine, University of California-Davis, Davis, CA 95616.
  • | 4 4Department of Clinical Studies–Philadelphia, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104.
DOI:
https://doi.org/10.2460/javma.254.8.944
Volume/Issue:
Volume 254: Issue 8
Online Publication Date:
15 Apr 2019
Restricted access
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Abstract

OBJECTIVE

To describe postobstructive diuresis (POD) in cats undergoing surgical placement of ureteral stents or subcutaneous ureteral bypass systems for treatment of ureteral obstruction in cats and to identify factors associated with duration and maximum severity of POD.

DESIGN

Retrospective case series.

ANIMALS

37 client-owned cats with ureteral obstruction treated between August 2010 and December 2014.

PROCEDURES

Medical records were reviewed, and data extracted included signalment, history, results from physical examinations and clinical laboratory analyses, treatment, urine output, and outcome. Data were evaluated to identify factors associated with POD duration and maximum severity, alone or in combination.

RESULTS

Serum concentrations of creatinine, potassium, phosphorus, and BUN before surgery positively correlated with duration and maximum severity of POD. Absolute changes in serum concentrations of creatinine, potassium, and BUN from before surgery to after surgery positively correlated with POD duration. Cats with anuria before surgery had longer POD than did other cats; however, there was no difference in POD duration or maximum severity with unilateral versus bilateral ureteral obstruction. Thirty-four of 37 (92%) cats survived to hospital discharge, which was not associated with whether ureteral obstruction was unilateral or bilateral. Azotemia resolved in 17 of the 34 (50%) cats that survived to hospital discharge.

CONCLUSIONS AND CLINICAL RELEVANCE

Results of the present study indicated that several factors were associated with POD duration and maximum severity, alone or in combination, and that with intensive management of fluid and electrolyte derangements, regardless of the extent of the original azotemia, a high percentage of cats survived to hospital discharge.

Contributor Notes

Mr. Ben-Aderet was a first-year veterinary student at the time of the study.

Address correspondence to Dr. Culp (wculp@ucdavis.edu).