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Home / Equine Research Bank / Acta Vet Scand / Dissociative anaesthesia during field and hospital condition...
Acta veterinaria Scandinavica2006; 47(1); 1-11; doi: 10.1186/1751-0147-47-1

Dissociative anaesthesia during field and hospital conditions for castration of colts.

Abstract: The principal aim of this study was to evaluate dissociative anaesthesia for castration of colts during field conditions. Three dissociative anaesthetic protocols were evaluated during castration of colts in an animal hospital. The protocol considered to be the most suitable was thereafter evaluated during castration of colts under field conditions. Respiratory and haemodynamic parameters and the response to surgery were determined during anaesthesia. All horses breathed air spontaneously during anaesthesia. Under hospital conditions 26 colts were randomised to receive one of three anaesthetic protocols: Romifidine and tiletamine-zolazepam (RZ); acepromazine, romifidine and tiletamine-zolazepam (ARZ); or acepromazine, romifidine, butorphanol and tiletamine-zolazepam (ARBZ). The surgeon was blinded to the anaesthetic protocol used and decided whether supplemental anaesthesia was needed to complete surgery. Under field conditions 31 colts were castrated during anaesthesia with the ARBZ protocol. All inductions, anaesthesia and recoveries were calm and without excitation under both hospital and field conditions. Surgery was performed within 5-20 minutes after the horses had assumed lateral recumbency during both hospital and field castrations. Under hospital conditions some horses needed supplemental anaesthesia with all three anaesthetic protocols to complete surgery. Interestingly, none of the horses castrated with protocol ARBZ under field conditions needed additional anaesthesia. Cardiorespiratory changes were within acceptable limits in these clinically healthy colts.
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Publication Date: 2006-05-26 PubMed ID: 16722301PubMed Central: PMC1618963DOI: 10.1186/1751-0147-47-1Google Scholar: Lookup
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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.

The study aims to evaluate the effectiveness of dissociative anesthesia protocols when castrating colts both under hospital and field conditions. It notably compares three different anesthesia protocols and determines their success rate, as well as observing any changes in cardiorespiratory health post-surgery.

Study Design and Evaluation

  • The research focuses primarily on dissociative anesthesia, a type of anesthesia that separates perception from sensory experiences, during the castration of colts, or young male horses.
  • Three different types of anesthesia protocols are examined: Romifidine and tiletamine-zolazepam (RZ); acepromazine, romifidine and tiletamine-zolazepam (ARZ); or acepromazine, romifidine, butorphanol and tiletamine-zolazepam (ARBZ).
  • The research took place in two environments: a controlled animal hospital setting and under field conditions to test the adaptability and robustness of the protocols.

Execution and Findings of Experiment

  • In the hospital environment, 26 colts were randomly assigned one of the three anesthesia protocols. The surgeon performing the operation did not know which protocol was used, testing if supplemental anesthesia was necessary to complete the surgery.
  • Under the field conditions, 31 colts were castrated using the ARBZ protocol specifically. The rationale behind this choice is not provided in the abstract but presumably is based on the results under the hospital conditions.
  • The results showed that the surgery was performed within 5-20 minutes under both conditions after the horses were placed in lateral recumbency, a position where the horse is lying on its side.
  • Under hospital conditions, some horses required additional anesthesia with all three protocols. However, in the field conditions, no additional anesthesia was needed for the colts on ARBZ protocol. This suggests that ARBZ was the most effective protocol under these specific conditions.

Health Observations Post-Surgery

  • The horses spontaneously breathed air post-anesthesia, indicating successful recovery.
  • The study also examined the cardiorespiratory changes post-surgery, which generally stayed within acceptable limits for healthy horses. This affirms that the protocols did not have adverse health effects on the tested subjects.
  • In conclusion, the study suggests that dissociative anesthesia can effectively be administered to colts during castration in both field and hospital conditions while limiting negative health impacts, especially when the ARBZ protocol is used.

Cite This Article

APA
Marntell S, Nyman G, Funkquist P. (2006). Dissociative anaesthesia during field and hospital conditions for castration of colts. Acta Vet Scand, 47(1), 1-11. https://doi.org/10.1186/1751-0147-47-1

Publication

Acta veterinaria Scandinavica
ISSN: 0044-605X
NlmUniqueID: 0370400
Country: England
Language: English
Volume: 47
Issue: 1
Pages: 1-11

Researcher Affiliations

Marntell, S
  • Department of Clinical Sciences, Faculty of Veterinary Medicine and Animal Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Nyman, G
    Funkquist, P

      MeSH Terms

      • Anesthesia / adverse effects
      • Anesthesia / methods
      • Anesthesia / veterinary
      • Anesthetics, Combined / therapeutic use
      • Animals
      • Blood Gas Analysis / veterinary
      • Conscious Sedation / adverse effects
      • Conscious Sedation / methods
      • Conscious Sedation / veterinary
      • Heart Rate / drug effects
      • Hemodynamics / drug effects
      • Horses / physiology
      • Horses / surgery
      • Male
      • Orchiectomy / methods
      • Orchiectomy / veterinary
      • Random Allocation
      • Respiration / drug effects
      • Treatment Outcome

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      Citations

      This article has been cited 3 times.
      1. Wise IK, Klöppel H, Leece EA. Comparison of two doses of ketamine for induction of anaesthesia in ponies undergoing field castration.. Open Vet J 2021 Oct-Dec;11(4):747-754.
        doi: 10.5455/OVJ.2021.v11.i4.27pubmed: 35070872google scholar: lookup
      2. Gozalo-Marcilla M, Ringer SK. Recovery after General Anaesthesia in Adult Horses: A Structured Summary of the Literature.. Animals (Basel) 2021 Jun 14;11(6).
        doi: 10.3390/ani11061777pubmed: 34198637google scholar: lookup
      3. Casoni D, Spadavecchia C, Wampfler B, Thormann W, Levionnois OL. Clinical and pharmacokinetic evaluation of S-ketamine for intravenous general anaesthesia in horses undergoing field castration.. Acta Vet Scand 2015 May 3;57(1):21.
        doi: 10.1186/s13028-015-0112-4pubmed: 25935721google scholar: lookup
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