探究腹腔镜直肠低位前切术（Dixon）中保留左结肠动脉对老年低位直肠癌患者的影响。

选取2021年12月至2024年12月行腹腔镜Dixon的136例老年低位直肠癌患者，通过随机抽签法分为研究组和对照组，每组68例。研究组保留左结肠动脉，对照组不保留左结肠动脉。应用SPSS 26.0统计学软件处理数据。围手术期指标、肿瘤直径等符合正态分布的计量资料以（±s）表示，组间比较行独立样本t检验；TNM分期等计数资料以[例（%）]表示，采用卡方检验，理论频数<5时采用Fisher精确检验。P<0.05为差异有统计学意义。

相较于对照组，研究组患者手术时间较长，术后首次排便时间、术后首次排气时间和术后住院时间较短，术后吻合口漏的发生率较低（P<0.05）；两组患者淋巴结清扫数目、术中出血量、术后其他并发症的发生率比较，差异无统计学意义（P>0.05）。术后两组患者血清炎症指标[C反应蛋白（CRP）、降钙素原（PCT）、白介素-6（IL-6）]均升高，但研究组上述血清炎症指标升高幅度小于对照组（P<0.05）。

腹腔镜Dixon术中保留左结肠动脉治疗老年低位直肠癌虽然时间较长，但术后恢复较快，且能有效控制手术创伤带来的炎症反应，预防术后吻合口漏的发生。

To explore the impact of preserving the left colic artery during laparoscopic low anterior resection (Dixon) in elderly patients with low rectal cancer.

A total of 136 elderly patients with low rectal cancer who underwent laparoscopic Dixon surgery from December 2021 to December 2024 were selected. They were divided into a study group and a control group using a random lottery method, with 68 cases in each group. The study group underwent preservation of the left colic artery, while the control group did not. Data were analyzed using SPSS 26.0 statistical software. Perioperative indicators, tumor diameter, and other measurement data that conformed to a normal distribution were expressed as (±s), and intergroup comparisons were performed using independent samples t test. Count data such as TNM staging were expressed as [cases(%)] and analyzed using the χ² test; Fisher’s exact test was used when the theoretical frequency was <5. P<0.05 was considered statistically significant.

Compared with the control group, the study group had a longer operation time, but shorter time to first postoperative defecation, first postoperative flatus, and postoperative hospital stay, as well as a lower incidence of postoperative anastomotic leakage (P<0.05). There were no statistically significant differences between the two groups in the number of lymph nodes dissected, intraoperative blood loss, or the incidence of other postoperative complications (P>0.05). After surgery, serum inflammatory indicators [C-reactive protein (CRP), procalcitonin (PCT), interleukin-6 (IL-6)] increased in both groups, but the magnitude of the increase of these serum inflammatory indicators in the study group was smaller than that in the control group (P<0.05).

Although preserving the left colic artery during laparoscopic Dixon surgery for elderly patients with low rectal cancer prolongs the operation time, it promotes faster postoperative recovery, effectively controls the inflammatory response caused by surgical trauma, and prevents the occurrence of postoperative anastomotic leakage.