Evaluation of the Effective Preanesthetic Medication Method of Medetomidine and Butorphanol Combination in Cats
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概要
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For evaluation of the effective preanesthetic medication method, we compared three treatments for 30 cats: intramuscular administration of combination of medetomidine at 500 μg/m2 - butorphanol at 0.2 mg/kg (group mid-Med+low-Btr: n=10), medetomidine at 250 μg/m2 - butorphanol at 0.4 mg/kg (group low-Med+high-Btr: n=10) and medetomidine alone at 1,500 μg/m2 (group high-Med: n=10). All cats were performed ovariohysterectomy or orchidectomy for under the inhalation anesthesia of isoflurane by using an anesthetic mask after the preanesthetic medication described as above. While decreases of heart rate, temperature drops and elongation of arousal time was found for high-Med and mid-Med+low-Btr, those responses were not found under the use of low-Med+high-Btr. As side effects, some cats with high-Med vomited after the premedication, but no cats vomited when they are premedicated with medetomidine - butorphanol combination. In addition, we observed clinically useful sedative effect for all cats in these preanesthetic medication. Some cats with high-Med got excited slightly when and after the recovery from anesthesia, but we rarely found such effects for medetomidine - butorphanol combination groups. We conclude that it is useful for reasons to use the medetomidine-butorphanol intramuscular administration as a preanesthetic medication: obtaining good quality of sedative effect, preventing vomiting induced by medetomidine and smooth recovery from anesthesia.
- 獣医麻酔外科学会の論文
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