Progress on Laennec's capsule guidance for hepatobiliary surgery.

Anatomic resection remains a fundamental principle in the surgical management of hepatobiliary diseases, whether performed through traditional open surgery or advanced minimally invasive approaches such as laparoscopic or robotic-assisted techniques. However, a universally accepted and clearly defined anatomical framework for intraoperative anatomical delineation remains lacking. The growing clinical adoption of Laennec membrane-guided anatomical strategies has been associated with notable improvements in surgical efficacy and anatomical precision. This approach facilitates clear identification of anatomical layers, enhances visualization of key landmarks, and enables the execution of precise anatomical resections. As a result, it promotes standardization and reproducibility across surgical procedures. This article presents a comprehensive review of operative techniques and critical technical considerations for Laennec membrane-guided anatomical procedures in hepatobiliary surgery, establishing a three-dimensional anatomical foundation for clinical practice to support the standardization and broader adoption of precision-oriented hepatobiliary surgical methodologies.