Learning curves of minimally invasive donor nephrectomy in a high-volume center: A cohort study of 1895 consecutive living donors

Background Few studies have investigated the learning curves of minimally invasive donor nephrectomy (MIDN) using the cumulative sum (CUSUM) analysis. In addition, no study has compared the learning curves of the different surgical MIDN techniques in one cohort study using the CUSUM analysis. This study aims to evaluate and compare learning curves for several MIDN using the CUSUM analysis. Methods A retrospective review of consecutive donors, who underwent MIDN between 1997 and 2019, was conducted. Three laparoscopic-assisted techniques were applied in our institution and included for analysis: laparoscopic (LDN), hand-assisted retroperitoneoscopic (HARP), and robot-assisted laparoscopic (RADN) donor nephrectomy. The outcomes were compared based on surgeon volume to develop learning curves for the operative time per surgeon. Results Out of 1895 MIDN, 1365 (72.0%) were LDN, 427 (22.5%) were HARP, and 103 (5.4%) were RADN. The median operative time and median blood loss were 179 (IQR, 139–230) minutes and 100 (IQR, 40–200) mL, respectively. The incidence of major complication was 1.2% with no mortality, and the median hospital stay was three (IQR, 3–4) days. The CUSUM analysis resulted in learning curves, defined by decreased operative time, of 23 cases in LDN, 45 cases in HARP, and 26 cases in RADN. Conclusions Our study shows different learning curves in three MIDN techniques with equal post-operative complications. The LDN and RADN learning curves are shorter than that of the hand-assisted donor nephrectomy. Our observations can be helpful for informing the development of teaching requirements for fellows to be trained in MIDN

Learning curve of kidney transplantation in a high-volume center: A Cohort study of 1466 consecutive recipients

Background The purpose of this study was to evaluate surgical outcomes of kidney transplantation (KTX) based on surgeon volume and surgeon experience, and to develop the learning curve model for KTX using the cumulative sum (CUSUM) analysis. Methods A retrospective review of 1466 consecutive recipients who underwent KTX between 2010 and 2017 was conducted. In total, 51 surgeons, including certified transplant surgeons, transplant fellows and surgical residents were involved in these procedures using a standardized protocol. Outcomes were compared based on surgeon volume (low [1–30] versus high [31≥] volume) and surgeon's type (consultant surgeons, fellows or residents). Results Operative time (129 versus 135 min, P Conclusions Surgical training in KTX using a standardize protocol can be accomplished with a steep learning curve without compromising perioperative outcomes under the careful selection of surgeons and procedures

Laparoscopic kidney donation:The impact of adhesions

Background: Adhesion formation following abdominal surgery causes substantial burden to society. Laparoscopic donor nephrectomy (LDN) offers an opportunity to study the prevalence of adhesions in healthy individuals. Furthermore we evaluated whether or not adhesions hindered LDN. Methods: Data of 161 LDNs were prospectively collected. The presence of adhesions was documented. Parameters influenced by the presence of adhesions such as operation time, blood loss, and intraoperative complications were documented. Results: Twenty-eight of 44 donors (64%) who had had prior abdominal surgery presented with adhesions at laparoscopy versus 61 of 107 donors (52%) who had no history of abdominal surgery (P = 0.22). Conversion and complication rate, operation times, and blood loss did not differ between those with and without a previous history of abdominal surgery. Blood loss and operation time did not differ between donors with and without adhesions. The number of conversions to open was significantly higher in donors with adhesions (9 versus 0, P = 0.005). Three conversions were due to adhesions. Conclusion: Adhesions are present in a significant number of healthy individuals regardless of a history of previous abdominal operations. As these operations are of no predictive value for the number and complexity of adhesion formation, we advocate starting live kidney donation laparoscopically as the procedure can be most probably conducted successfully by this approach.</p

Laparoscopic kidney donation:The impact of adhesions

Background: Adhesion formation following abdominal surgery causes substantial burden to society. Laparoscopic donor nephrectomy (LDN) offers an opportunity to study the prevalence of adhesions in healthy individuals. Furthermore we evaluated whether or not adhesions hindered LDN. Methods: Data of 161 LDNs were prospectively collected. The presence of adhesions was documented. Parameters influenced by the presence of adhesions such as operation time, blood loss, and intraoperative complications were documented. Results: Twenty-eight of 44 donors (64%) who had had prior abdominal surgery presented with adhesions at laparoscopy versus 61 of 107 donors (52%) who had no history of abdominal surgery (P = 0.22). Conversion and complication rate, operation times, and blood loss did not differ between those with and without a previous history of abdominal surgery. Blood loss and operation time did not differ between donors with and without adhesions. The number of conversions to open was significantly higher in donors with adhesions (9 versus 0, P = 0.005). Three conversions were due to adhesions. Conclusion: Adhesions are present in a significant number of healthy individuals regardless of a history of previous abdominal operations. As these operations are of no predictive value for the number and complexity of adhesion formation, we advocate starting live kidney donation laparoscopically as the procedure can be most probably conducted successfully by this approach.</p