Objective The aim of this study was to retrospectively evaluate the success rate and perioperative complications of lumbosacral extradural anaesthesia in dogs undergoing total hip replacement.

Study Design Records of dogs undergoing total hip replacement in which lumbosacral extradural anaesthesia with 0.5% levo- or bupivacaine combined with either morphine or buprenorphine were retrieved. Success rate was defined as intraoperative fentanyl consumption <1 μg/kg/h with no intravenous infusion of other analgesic drugs and no additional morphine/methadone within the first 3 hours from premedication. Prevalence of intraoperative anaesthetic and postoperative surgical complications was calculated.

Results Overall, 206 dogs were included in the study. Success rate was 88.7%. Hypercapnia (75.2%), hypotension (46.1%), hypothermia (27.7%) and regurgitation (6.3%) were recorded during anaesthesia. Within 24 hours post-surgery, urinary retention (17.8%), vomiting/regurgitation/diarrhea (8.2%) and sciatic neurapraxia of the operated limb (5.8%) were recorded. Luxation of the operated hip occurred at 48 and 72 hours after surgery in two dogs and one dog respectively. One dog had cardiopulmonary arrest at 52 hours after surgery.

Conclusion While hypercapnia, hypotension and hypothermia might develop intraoperatively, the high success rate and the relatively low prevalence of postoperative surgical complications directly associated with lumbosacral extradural anaesthesia justify its use in dogs undergoing total hip replacement.

目的 回顾性评价犬全髋关节置换术腰骶硬膜外麻醉的成功率和围手术期并发症。

研究设计 检索接受全髋关节置换术的狗的记录，其中使用 0.5% 左旋或布比卡因联合吗啡或丁丙诺啡进行腰骶硬膜外麻醉。成功率定义为术中芬太尼消耗量 <1 μg/kg/h，且在术前用药后的前 3 小时内未静脉输注其他镇痛药物且未额外使用吗啡/美沙酮。计算术中麻醉剂和术后手术并发症的发生率。

结果 总的来说，研究中包括了 206 只狗。成功率为88.7%。麻醉期间记录了高碳酸血症 (75.2%)、低血压 (46.1%)、体温过低 (27.7%) 和反流 (6.3%)。术后 24 小时内，记录了手术肢体的尿潴留 (17.8%)、呕吐/反流/腹泻 (8.2%) 和坐骨神经失用症 (5.8%)。2只犬和1只犬分别在术后48小时和72小时发生手术髋关节脱位。一只狗在手术后 52 小时出现心肺骤停。

结论 虽然术中可能会出现高碳酸血症、低血压和体温过低，但与腰骶硬膜外麻醉直接相关的高成功率和相对较低的术后手术并发症发生率证明了其在接受全髋关节置换术的犬中的使用是合理的。