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  • Title: Evaluation of the influence of atipamezole on the postoperative analgesic effect of buprenorphine in cats undergoing a surgical ovariohysterectomy.
    Author: Warne LN, Beths T, Carter JE, Whittem T, Bauquier SH.
    Journal: Vet Anaesth Analg; 2016 Jul; 43(4):424-8. PubMed ID: 26849034.
    Abstract:
    OBJECTIVE: To evaluate the influence of atipamezole on postoperative pain scores in cats. STUDY DESIGN: Controlled, randomized, masked clinical trial. ANIMALS: Twelve healthy female domestic cats. METHODS: Cats admitted for ovariohysterectomy (OVH) surgery were randomly allocated to group atipamezole (n = 6) or group saline (n = 6) and were premedicated with buprenorphine 20 μg kg(-1) intramuscularly (IM) and alfaxalone 3.0 mg kg(-1) subcutaneously (SC). Anaesthesia was induced with alfaxalone intravenously (IV) to effect and maintained with isoflurane in oxygen. Ten minutes after extubation, cats from group atipamezole received IM atipamezole (0.0375 mg kg(-1) ) whereas group saline received an equivalent volume [0.0075 mL kg(-1) (0.003 mL kg(-1) IM)] of 0.9% saline. A validated multidimensional composite scale was used to assess pain prior to premedication and postoperatively (20 minutes after extubation). If postoperative pain scores dictated, rescue analgesia consisting of buprenorphine and meloxicam were administered. Pain score comparisons were made between the two groups using a Mann-Whitney exact test. Results are reported as the median and range. RESULTS: Preoperatively, all cats scored 0. At the postoperative pain evaluation, the pain scores from group atipamezole [16 (range, 12-20)] were not significantly different from group saline [18 (range, 15-23)] (p = 0.28). All cats required rescue analgesia post-operatively. CONCLUSIONS AND CLINICAL RELEVANCE: Atipamezole (0.0375 mg kg(-1) IM) administration did not significantly affect the postoperative pain scores in cats after OVH. Preoperative administration of buprenorphine (20 μg kg(-1) IM) did not provide adequate postoperative analgesia for feline OVH.
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