Objective:

To analyze the learning curve of unilateral biportal endoscopic lumbar interbody fusion (UBE-LIF).

Methods:

Fifty-five patients with single-segment lumbar degenerative disease treated with UBE-LIF between December 2020 and February 2022 were selected as the research subjects. The patients were grouped according to the operation sequence, the first 27 cases were in the early group, and the last 28 cases were in the late group. There was no significant difference between the two groups in age, gender, disease type, and surgical segment distribution ( P>0.05). The operation time, the amount of hemoglobin loss (the difference between 1 day before operation and 3 days after operation), the hospital stay after operation, and the incidence of perioperative complications were recorded; the learning curve of UBE-LIF was analyzed by log-curve regression analysis.

Results:

All the operations were successfully completed without changing to other operations. The operation time, the amount of hemoglobin loss, and hospital stay in the early group were significantly more than those in the late group ( P<0.05). Complications occurred in 2 cases (7.4%) in the early group, including 1 case of dural tear during operation and 1 case of epidural hematoma after operation, and 1 case (3.6%) with transient radiculitis in the late group. There was no significant difference in the incidence of complications between the two groups ( P=0.518) . The log-curve regression analysis showed that the operation time decreased significantly with the increase of the number of patients ( P<0.05). The operation time tended to be stable after the surgeon completed 17 cases.

Conclusion:

For single-level lumbar degenerative disease, the operation time of UBE-LIF can decrease gradually with the increase of the number of patients, and tend to be stable after 17 cases.

目的:

分析单侧双通道脊柱内镜（unilateralbiportal endoscopy，UBE）技术行腰椎椎间融合术（lumbar interbody fusion，LIF）的学习曲线。.

方法:

以2020年12月—2022年2月采用UBE-LIF治疗的55例单节段腰椎退行性疾病患者为研究对象。患者根据手术时间排序并分组，前27例为早期组，后28例为晚期组。两组患者年龄、性别、疾病类型及手术节段分布比较，差异均无统计学意义（ P>0.05）。记录手术时间、血红蛋白丢失量（术前1 d与术后3 d差值）、术后住院时间，以及围术期相关并发症发生情况，并通过对数曲线回归分析方法评价UBE-LIF学习曲线。.

结果:

患者手术均顺利完成，无中途转为其他术式。早期组手术时间、血红蛋白丢失量以及术后住院时间均高于晚期组，差异有统计学意义（ P<0.05）。早期组2例（7.4%）发生并发症，其中术中硬脊膜撕裂1例、术后硬膜外血肿1例；晚期组1例（3.6%）发生一过性神经根炎；两组并发症发生率差异无统计学意义（ P=0.518）。对数曲线回归分析示，随着患者例数增加，手术时间明显减少（ P<0.05），术者完成17例手术后手术时间趋于稳定。.

结论:

UBE-LIF治疗单节段腰椎退行性疾病时，手术时间会随着术者操作例数增加而逐步减少，并在17例后趋于稳定。.