PT - JOURNAL ARTICLE AU - ISHIZAKI, TETSUO AU - MAZAKI, JUNICHI AU - KASAHARA, KENTA AU - UDO, RYUTARO AU - TAGO, TOMOYA AU - NAGAKAWA, YUICHI TI - Learning Curve of Intracorporeal Anastomosis in Laparoscopic Colectomy for Right Side Colon Cancer: A Cumulative Sum Analysis AID - 10.21873/anticanres.16510 DP - 2023 Jul 01 TA - Anticancer Research PG - 3341--3348 VI - 43 IP - 7 4099 - http://ar.iiarjournals.org/content/43/7/3341.short 4100 - http://ar.iiarjournals.org/content/43/7/3341.full SO - Anticancer Res2023 Jul 01; 43 AB - Background/Aim: Recently, laparoscopic colectomy with intracorporeal anastomosis for colon cancer gained popularity due to the evolution of the laparoscopic linear stapler device and improved techniques from laparoscopic surgeons. However, there are technical difficulties associated with intracorporeal anastomosis. The aim of the study was to clarify the number of cases that are required for laparoscopic surgeons to master the technique of intracorporeal anastomosis in right side colon cancer. Patients and Methods: In this retrospective single-center study, 51 consecutive patients who underwent intracorporeal overlap anastomosis, between July 2018 and March 2020, by one laparoscopic surgeon were selected. Clinicopathological and perioperative data were obtained from our database. The learning curves of intracorporeal anastomosis time (IAT) were created using the cumulative sum (CUSUM) method. Results: The CUSUM score for IAT increased as the number of operative cases progressed, up to the 20th case (Phase 1), after which it started to decrease (Phase 2). Compared to the initial learning phase (Phase 1), the master phase (Phase 2) had a significantly faster IAT (p<0.001), significantly decreased incidence of organ/space surgical site infection (p=0.009), and significantly decreased postoperative hospital stay (p=0.021). Conclusion: Twenty cases were required for a laparoscopic surgeon to achieve expertise when conducting intracorporeal anastomosis in laparoscopic colectomy for right side colon cancer. It was suggested that proficiency in intracorporeal anastomosis may contribute to a reduction in the incidence of organ/space surgical site infections and postoperative hospital stay.