摘要腹腔镜独特的多视角及手术视野放大作用使胃外科步入更为精准、微创的领域。4K腹腔镜的技术革新让外科医师认识更为精细的亚微结构——膜解剖。膜解剖理论指导下胃周区域淋巴结清扫创伤更小和出血量更少的优势得到广泛认可。幽门下区淋巴结作为进展期远端胃癌常见转移部位，在胃癌根治术中占有重要地位。幽门下区血管变异多，胃、结肠系膜层次复杂，胃网膜右系膜的完整切除能增加更大的手术获益。笔者通过手术实例探讨4K腹腔镜胃癌根治术幽门下区淋巴结清扫技术要点，旨在推广基于膜解剖的4K腹腔镜幽门下区淋巴结清扫标准手术方式。

abstractsThe unique multi perspective and magni-fying effect of laparoscopic surgery make gastric surgery more precise and minimally invasive. The technical innovation of 4K laparoscopy enable surgeons to understand the finer submicrostructure-membrane anatomy. The advantages of perigastric lymph node dissection with less trauma and bleeding under the guidance of membrane anatomy theory are widely recognized. As a common metastatic site of advanced distal gastric cancer, lymph nodes in the infrapyloric region play an important role in radical gastrectomy. Blood vessels variation is common in the inferior pyloric region, and the layer between gastric and mesenteric membrane is complex. Complete resection of the right gastric omentum membrane can yield greater surgical benefits. In this article, the author discuss the key points of lymph node dissection in the subpyloric region based on their surgical experience, aiming to promote the standard surgical procedure of 4K laparoscopic lymph node dissection in the inferior pyloric region based on membrane anatomy.