Objective The aim of this study was to compare the resulting short-term complications after simultaneous (SIM) or staged (ST) tibial plateau levelling osteotomy (TPLO) in patients that presented with bilaterally torn cranial cruciate ligaments.

Study Design This was a retrospective study.

Materials and Methods Medical records of dogs diagnosed with bilateral cranial cruciate ligament disease that underwent bilateral SIM or ST TPLO surgery with arthroscopy (2005–2015) were reviewed to evaluate the intra- and postoperative complications. Data were analysed and major and minor complications were compared between the two groups.

Results A total of 176 client-owned dogs (352 stifles) that had TPLO performed bilaterally with SIM or ST procedures were included for analysis. The overall complication rate was 47.5% for the SIM group and 19.5% for the ST group. The incidence of major complications was 10.1 and 3.8% in the SIM and ST groups respectively. Minor complications were 38.4 and 15.6% in the SIM and ST groups respectively. Tibial tuberosity fractures requiring revision were noted in 2% of the SIM group and none of the ST group.

Clinical Significance Although no significant difference was noted in major complication rate or tibial tuberosity fractures in our cohort of patients, a Type II statistical error was found. The complication rate in the SIM group is numerically greater by a factor of 2–3× or more for nearly all categories. Surgeons should consider the risks and benefits of SIM versus ST procedures as well as relevant individual patient and client factors before electing either alternative.

目的 本研究的目的是比较双侧颅交叉韧带撕裂患者在同步 (SIM) 或分期 (ST) 胫骨平台整平截骨术 (TPLO) 后产生的短期并发症。

研究设计 这是一项回顾性研究。

材料和方法 回顾了被诊断患有双侧颅交叉韧带疾病并接受双侧 SIM 或 ST TPLO 关节镜手术（2005-2015 年）的狗的医疗记录，以评估术中和术后并发症。分析数据并比较两组的主要和次要并发症。

结果 共有 176 只客户拥有的狗（352 条窒息）进行了双侧 TPLO 与 SIM 或 ST 程序的分析。SIM 组的总体并发症发生率为 47.5%，ST 组为 19.5%。SIM组和ST组主要并发症的发生率分别为10.1%和3.8%。SIM组和ST组的轻微并发症分别为38.4%和15.6%。SIM 组中 2% 的胫骨结节骨折需要翻修，ST 组中没有。

临床意义 尽管在我们的患者队列中，主要并发症发生率或胫骨结节骨折没有显着差异，但发现了 II 型统计错误。对于几乎所有类别，SIM 组中的并发症发生率在数值上增加了 2-3 倍或更多。外科医生在选择任一替代方案之前，应考虑 SIM 与 ST 手术的风险和益处以及相关的个体患者和客户因素。