Modified pulley maneuver to guide surgical plane in minimally invasive liver resection

Introduction

Achieving an adequate surgical plane through optimal traction is crucial for liver parenchymal transection in minimally invasive liver surgery (MILS). MILS is more technically demanding than open liver surgery because of limited instrument mobility and the inability to use the surgeon's hand, potentially leading to iatrogenic injuries. The Pulley maneuver using barbed sutures has been used for laparoscopic hepatectomy; however, the sutures are single-use and may pass through the liver parenchyma, making it uneconomical and inflexible. To address this, we developed a modified pulley maneuver using a barbed with a nonabsorbable polymer clip and metal clip for parenchymal transection in MILS.

Materials and Surgical Technique

Before liver transection, we prepared barbed sutures and attached nonabsorbable polymer and metal clips to the distal end. The metal clip prevented the nonabsorbable polymer clip from slipping, allowing one suture to be reused three times. Before liver transection, the suture was passed through the liver surface twice, with the clips to reduce iatrogenic damage. The sutures were anchored to the diaphragm or peritoneum for optimal liver traction. A laparoscopic or robotic grasper adjusted the suture tension for the appropriate transection plane. In open-pit-shaped resections, the liver is lifted ventrally for deeper access, whereas in wedge-shaped resections, it is elevated in the caudal view. The modified pulley maneuver provides stable liver traction.

Discussion

The modified pulley maneuver is an economical, simple, and feasible method for enabling stable liver traction, thereby enhancing the versatility and safety of liver parenchymal transection in MILS.