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Purpose <p>This study evaluates the effectiveness of laparoscopic dog ear region removal as a modified double-stapling anastomosis (DSA) technique to reduce the risk of anastomotic leakage (AL) after colorectal cancer surgery.</p> Methods <p>We retrospectively analyzed 216 colorectal cancer patients who underwent laparoscopic anterior resection between January 2022 and June 2024. Patients were divided into two groups: the non–dog ear group (<i>n</i> = 104), which underwent dog ear area resection before DSA, and the DSA group (<i>n</i> = 112), which received conventional treatment.</p> Results <p>Baseline demographics, comorbidities, tumor characteristics, and preoperative treatments were comparable between the two groups (all <i>p</i> &gt; 0.05). There were no significant differences in operative time (non–dog ear: 213.57 ± 57.06&#xa0;min vs. DSA: 210.23 ± 65.11&#xa0;min, <i>p</i> = 0.688) or overall complication rates (9.62% vs. 17.85%, <i>p</i> = 0.080). However, the non–dog ear group had significantly lower AL incidence (1.92% vs. 8.04%, <i>p</i> = 0.041) and shorter postoperative hospitalization and drainage tube removal times.</p> Conclusions <p>In this retrospective study, laparoscopic “dog ear” resection before DSA was associated with reduced AL risk and did not compromise surgical safety in colorectal cancer surgery, suggesting it may be a feasible refinement to standard procedures. These associations, however, require validation through prospective studies.</p>

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Reducing AL After Double-Stapling Anastomosis: A Novel Laparoscopic Technique for Dog Ear Area Resection

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • Yuan Jinpeng,
  • Wang Puyu,
  • Haokai Hu,
  • Yang Shaoli,
  • Lin Jiarui,
  • Zhuang Yezhong,
  • Xu Muming,
  • Chen Binbin,
  • Lin Guixing

摘要

Purpose

This study evaluates the effectiveness of laparoscopic dog ear region removal as a modified double-stapling anastomosis (DSA) technique to reduce the risk of anastomotic leakage (AL) after colorectal cancer surgery.

Methods

We retrospectively analyzed 216 colorectal cancer patients who underwent laparoscopic anterior resection between January 2022 and June 2024. Patients were divided into two groups: the non–dog ear group (n = 104), which underwent dog ear area resection before DSA, and the DSA group (n = 112), which received conventional treatment.

Results

Baseline demographics, comorbidities, tumor characteristics, and preoperative treatments were comparable between the two groups (all p > 0.05). There were no significant differences in operative time (non–dog ear: 213.57 ± 57.06 min vs. DSA: 210.23 ± 65.11 min, p = 0.688) or overall complication rates (9.62% vs. 17.85%, p = 0.080). However, the non–dog ear group had significantly lower AL incidence (1.92% vs. 8.04%, p = 0.041) and shorter postoperative hospitalization and drainage tube removal times.

Conclusions

In this retrospective study, laparoscopic “dog ear” resection before DSA was associated with reduced AL risk and did not compromise surgical safety in colorectal cancer surgery, suggesting it may be a feasible refinement to standard procedures. These associations, however, require validation through prospective studies.