To study the clinical safety of tunnel laparoscopic anatomic left hemihepatectomy (LALH).

Sixty-two patients with LALH from January 2019 to June 2022 were selected as the study subjects. The patients were divided into two groups by random number table method: tunnel group and traditional group with 31 cases each. The tunnel group uses the "tunnel method" to run LALH, and the traditional group uses the traditional approach to run LALH. The data was processed by SPSS 22.0. Measurement data such as perioperative relevant indexes and liver function indexes were expressed by (). Inter-group comparison was performed by independent sample t test and intra-group comparison was performed by paired sample t test. The statistical data of postoperative complications were expressed by [n(%)] and χ² test was performed. P<0.05 was considered statistically significant.

The operation time, hilar occlusion time and intraoperative blood loss in the tunnel group were significantly lower than those in the traditional group (P<0.05), and the liver function indexes of the two groups at various time points after surgery were significantly different from those before surgery (P<0.05), and the tunnel group was significantly better than the traditional group (P<0.05). The total incidence of postoperative complications in the tunnel group was slightly lower than that in the traditional group (12.9% vs. 25.8%), but the difference was not statistically significant (P>0.05).

"Tunnel method" is safe and feasible to perform LALH, not only achieving the same efficacy as the traditional approach, but also reducing the postoperative complications while shortening the operation time, reducing intraoperative injury and reducing liver function injury, and further improving the safety of surgery.