Modified liver hanging maneuver in laparoscopic major hepatectomy: the learning curve and evolution of indications. 2020

Ji Hoon Kim, and Hyeyoung Kim
Department of Surgery, Eulji University College of Medicine, Dunsan 2(i)-dong, Seo-gu, Daejeon, Republic of Korea. asist10@hanmail.net.

Laparoscopic major hepatectomy is a technically challenging procedure requiring a steep learning curve. The liver hanging maneuver is a useful technique in liver resection, especially for large or invasive tumors, a relative contraindication of the laparoscopic approach. Therefore, this study aimed to evaluate the learning curve for laparoscopic major hepatectomy using the liver hanging maneuver and extended indications. Patients who underwent laparoscopic major hepatectomy using the liver hanging maneuver by a single surgeon from January 2013 and September 2018 were retrospectively reviewed. Our hanging technique involves placing the hanging tape along the inferior vena cava for right-sided hepatectomy or the ligamentum venosum for left-sided hepatectomy. The upper end of the tape was placed at the lateral side of the major hepatic veins. The learning curve for operating time and blood loss was evaluated using the cumulative sum (CUSUM) method. Among 53 patients, 18 underwent right hepatectomy, 26 underwent left hepatectomy, and 9 underwent right posterior sectionectomy. CUSUM analysis showed that operative time and blood loss improved after the 30th laparoscopic major hepatectomy. The 53 consecutive patients were divided into two groups (early, patients 1-30; late, patients 31-53). The median operative time was lower in the late group, but the difference was not statistically significant (270 vs. 245 min, p = 0.261). The median blood loss was also significantly lower in the late group (350 vs. 150 ml, p < 0.001). Large tumors (measuring > 10 cm) and tumors in proximity to major vessels were significantly higher in the late group (0 vs. 17.4%, p = 0.018; 3.3 vs. 21.7%, p = 0.036; respectively). This study shows that laparoscopic major hepatectomy using the modified liver hanging maneuver has a learning curve of 30 cases. After procedure standardization, the indications have gradually been extended to large or invasive tumors.

UI MeSH Term Description Entries
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D008113 Liver Neoplasms Tumors or cancer of the LIVER. Cancer of Liver,Hepatic Cancer,Liver Cancer,Cancer of the Liver,Cancer, Hepatocellular,Hepatic Neoplasms,Hepatocellular Cancer,Neoplasms, Hepatic,Neoplasms, Liver,Cancer, Hepatic,Cancer, Liver,Cancers, Hepatic,Cancers, Hepatocellular,Cancers, Liver,Hepatic Cancers,Hepatic Neoplasm,Hepatocellular Cancers,Liver Cancers,Liver Neoplasm,Neoplasm, Hepatic,Neoplasm, Liver
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D010535 Laparoscopy A procedure in which a laparoscope (LAPAROSCOPES) is inserted through a small incision near the navel to examine the abdominal and pelvic organs in the PERITONEAL CAVITY. If appropriate, biopsy or surgery can be performed during laparoscopy. Celioscopy,Laparoscopic Surgical Procedures,Peritoneoscopy,Surgical Procedures, Laparoscopic,Laparoscopic Assisted Surgery,Laparoscopic Surgery,Laparoscopic Surgical Procedure,Procedure, Laparoscopic Surgical,Procedures, Laparoscopic Surgical,Surgery, Laparoscopic,Surgical Procedure, Laparoscopic,Celioscopies,Laparoscopic Assisted Surgeries,Laparoscopic Surgeries,Laparoscopies,Peritoneoscopies,Surgeries, Laparoscopic,Surgeries, Laparoscopic Assisted,Surgery, Laparoscopic Assisted
D005260 Female Females
D006498 Hepatectomy Excision of all or part of the liver. (Dorland, 28th ed) Hepatectomies
D006503 Hepatic Veins Veins which drain the liver. Hepatic Vein,Vein, Hepatic,Veins, Hepatic
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000069592 Round Ligament of Liver A cord-like remnant structure formed from the closed left fetal UMBILICAL VEIN. It is located along the lower edge of the falciform ligament. Hepatic Round Ligament,Ligamentum Teres Hepatis,Hepatic Round Ligaments,Ligament, Hepatic Round,Ligaments, Hepatic Round,Ligamentum Teres Hepati,Liver Round Ligament,Liver Round Ligaments,Round Ligament, Hepatic,Round Ligaments, Hepatic

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