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Effects of adding butorphanol to a balanced anaesthesia protocol during arthroscopic surgery in horses
Author(s) -
Caure S.,
Cousty M.,
Tricaud C.
Publication year - 2010
Publication title -
veterinary record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.261
H-Index - 99
eISSN - 2042-7670
pISSN - 0042-4900
DOI - 10.1136/vr.b4799
Subject(s) - butorphanol , acepromazine , medicine , anesthesia , ketamine , halothane , xylazine , general anaesthesia , blood pressure , propofol , horse , surgery , heart rate , paleontology , biology
Three groups of horses scheduled for arthroscopic surgery were premedicated with 0.025 mg/kg acepromazine, 88 μg/kg romifidine and 25 mg/kg guaifenesin, and anaesthesia was induced with 2.2 mg/kg ketamine. In group 1 (14 horses), anaesthesia was maintained by halothane vaporised in oxygen, with supplementary doses of 20 μg/kgromifidine and 0.5 mg/kg ketamine every 20 minutes. The 17 horses in group 2 were maintained as for group 1; however, an additional dose of 0.05 mg/kg butorphanol was administered before the first incision. The 14 horses in group 3 were maintained as for group 2, except that the dose of romifidine was halved to 10 μg/kg. The mean (sd) dose of vaporised halothane (6.5 [1.1], 4.8 [1.3] and 4.8 [1.3] μl/kg/minute, for groups 1, 2 and 3, respectively), vaporiser dial setting (2.3 [0.2], 1.6 [0.4] and 1.3 [0.1] per cent) and dose of dobutamine administered to correct episodes of hypotension (0.16 [0.08], 0.07 [0.09] and 0.0 [0.0] μg/ kg/minute) were all significantly lower in groups 2 and 3 than in group 1. Mean arterial blood pressure was significantly higher in groups 2 and 3 than in group 1 (71 [3], 74 [5] and 80 [5] mmHg, for groups 1, 2 and 3, respectively).