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Home / Equine Research Bank / Vet Surg / Outcome of bilateral equid laparoscopic ovariectomies.
Veterinary surgery : VS2021; 50(5); 975-983; doi: 10.1111/vsu.13651

Outcome of bilateral equid laparoscopic ovariectomies.

Abstract: To assess outcomes and behavior changes associated with bilateral laparoscopic ovariectomies. Methods: Retrospective study. Methods: Fifty-one equids. Methods: Medical records were evaluated from equid bilateral laparoscopic ovariectomies from January 2012 to October 2018 with a potential of 6 months follow-up. Follow-up information obtained by telephone interviews included behavior before and after surgery. Likelihood ratio chi-square tests and odds ratios (OR) with 95% CI were calculated where applicable, with statistical significance at p < .05. Results: Bilateral ovariectomy was performed in 51 cases, with elective (no pathologic ovaries) ovariectomies performed in 41/51 cases. Occasional estrus-like behavior was observed postoperatively in 14/51 (27%) mares, but the behavior was mild and manageable in all cases. There was no age effect on outcome in all bilateral (p = .56) or elective only (p = .36) cases. In 37/41 (90%) elective cases, improvement was observed in the reason for presentation. Some response to altrenogest administration for behavior modification was observed preoperatively in 12/18 (67%) elective cases. Response to altrenogest was not associated with (p = .31) or able to predict a beneficial response to surgery (OR = 5.5; 95% CI = 0.38-78.57; p = .21). Conclusions: Response to altrenogest in elective cases may not predict behavioral outcome with ovariectomy. Occasional estrus-like behavior in mares postoperatively was not problematic for any owners. Bilateral ovariectomy is a viable treatment option for owners seeking to alleviate undesirable behavior in mares. Conclusions: This study should aid veterinarians and horse owners in case selection for bilateral ovariectomy.
© 2021 American College of Veterinary Surgeons.
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Publication Date: 2021-05-01 PubMed ID: 33931888DOI: 10.1111/vsu.13651Google Scholar: Lookup
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Summary

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This research paper focuses on the outcomes and associated behavioral changes of bilateral laparoscopic ovariectomies in equids. It extensively analyzes the post procedural behaviors and establishes the viability of laparoscopic ovariectomies as treatment options for undesirable behaviors in mares.

Research Methodology

  • The researchers performed retrospective analysis of medical records for bilateral laparoscopic ovariectomies performed on equids over a period of almost seven years, until October 2018.
  • The study consisted of a sample size of 51 equids, with an anticipation of six months follow-up period. The follow-up data were collected via telephone interviews, primarily dealing with the behavioral changes before and after the surgery.
  • Likelihood ratio chi-square tests and odds ratios, with a 95 percent confidence interval, were used for statistical calculation. Conditions were considered statistically significant at p < 0.05.

Results

  • Elective (absence of pathological ovaries) ovariectomies accounted for major surgeries with 41 out of 51 cases. Postoperatively, around 27 percent mares displayed estrus-like behavior occasionally, but in all cases, it was not severe and could be managed.
  • No impact of age was observed on the outcomes of all bilateral cases or only elective cases.
  • Behavioral improvement was seen in about 90 percent of elective cases, which was the primary reason for their presentation.
  • Altrenogest, a medication used for behavior modification was seen to have some level of efficacy preoperatively in around 67 percent of elective cases. However, the response to this medication was found to be unrelated to and incapable of predicting a beneficial outcome post-surgery.

Conclusions

  • The researchers concluded that preoperative response to altrenogest medication might not predict the behavioral outcome post-ovariectomy.
  • They observed that the occasional estrus-like behavior exhibited by the mares postoperatively was not an issue for any horse owners.
  • Based on their findings, they identified bilateral ovariectomy as a valid treatment option for managing undesirable behavior in mares.
  • The result of this study is expected to assist veterinarians and horse owners in deciding upon bilateral ovariectomy as a treatment choice.

Cite This Article

APA
Collar EM, Duesterdieck-Zellmer KF, Huber MJ, Semevolos SA, Parker JE, Husby KA. (2021). Outcome of bilateral equid laparoscopic ovariectomies. Vet Surg, 50(5), 975-983. https://doi.org/10.1111/vsu.13651

Publication

Veterinary surgery : VS
ISSN: 1532-950X
NlmUniqueID: 8113214
Country: United States
Language: English
Volume: 50
Issue: 5
Pages: 975-983

Researcher Affiliations

Collar, Elizabeth M
  • Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, Tennessee, USA.
  • Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, USA.
Duesterdieck-Zellmer, Katja F
  • Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, USA.
Huber, Michael J
  • Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, USA.
Semevolos, Stacy A
  • Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, USA.
Parker, Jill E
  • Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, USA.
Husby, Kirsty A
  • Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, USA.

MeSH Terms

  • Animals
  • Behavior, Animal
  • Female
  • Horses / surgery
  • Laparoscopy / veterinary
  • Ovarian Diseases / surgery
  • Ovarian Diseases / veterinary
  • Ovariectomy / methods
  • Ovariectomy / veterinary
  • Postoperative Period
  • Progestins / administration & dosage
  • Progestins / pharmacology
  • Retrospective Studies
  • Treatment Outcome
  • Trenbolone Acetate / administration & dosage
  • Trenbolone Acetate / analogs & derivatives
  • Trenbolone Acetate / pharmacology

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