20.500.12556/DKUM-89605 The learning curve of laparoscopic liver resection utilising a difficulty score Background: This study aimed to quantitatively evaluate the learning curve of laparoscopic liver resection (LLR) of a single surgeon. Patients and methods: A retrospective review of a prospectively maintained database of liver resections was conducted. 171 patients undergoing pure LLRs between April 2008 and April 2021 were analysed. The Halls difficulty score (HDS) for theoretical predictions of intraoperative complications (IOC) during LLR was applied. IOC was defined as blood loss over 775 mL, unintentional damage to the surrounding structures, and conversion to an open approach. Theoretical association between HDS and the predicted probability of IOC was utilised to objectify the shape of the learning curve. Results: The obtained learning curve has resulted from thirteen years of surgical effort of a single surgeon. It consists of an absolute and a relative part in the mathematical description of the additive function described by the logarithmic function (absolute complexity) and fifth-degree regression curve (relative complexity). The obtained learning curve determines the functional dependency of the learning outcome versus time and indicates several local extreme values (peaks and valleys) in the learning process until proficiency is achieved. Conclusions: This learning curve indicates an ongoing learning process for LLR. The proposed mathematical model can be applied for any surgical procedure with an existing difficulty score and a known theoretically predicted association between the difficulty score and given outcome (for example, IOC). difficulty score learning curve laparoscopy hepatectomy intraoperative complications surgical procedures ocena težavnosti krivulja učenja laparoskopija hepatektomija intraoperativni zapleti kirurški postopki true false true Association of Radiology and Oncology Angleški jezik Slovenski jezik Znanstveno delo 2024-07-28 05:37:42 2025-04-07 07:54:48 2025-04-08 03:09:58 0000-00-00 00:00:00 2022 0 0 Str. 111-118 št. 1 Letn. 56 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2021-06-02 2021-07-16 2021-09-06 616.36-089 76566275 10.2478/raon-2021-0035 1318-2099 Ivanecz-2022-The_learning_curve_of_laparoscopi.pdf Ivanecz-2022-The_learning_curve_of_laparoscopi.pdf 1 6D21B41797E762A3D32B7D42163A5E25 93d2075f15ac3513ecc7135c3d901a023fcd35aa26ed2c110d9ca1db46f3604e 78c13334-1087-11f0-a266-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189965 https://doi.org/10.2478/raon-2021-0035 1 c564b240-4c92-11ef-8d0e-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=181827 Medicinska fakulteta Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerza v Mariboru 0 0 0