Perioperative Outcomes of Robot-Assisted Partial Nephrectomy with MP1000 Surgical System vs da Vinci Xi Surgical System and Evaluation of the MP1000 Learning Curve.

Abstract

Objective: To compare the perioperative outcomes between the MP1000 and da Vinci Xi surgical systems in robot-assisted partial nephrectomy (RAPN) and examine the MP1000 learning curve. Methods: In this prospective single-center study, 90 patients undergoing RAPN were equally allocated to the MP1000 (n = 45) or da Vinci Xi (n = 45) groups. Perioperative outcomes were analyzed, and the learning curve was assessed for MP1000 group operative times. Results: All procedures were completed without positive surgical margins. Significant discrepancies were observed in operation time, docking time, and estimated blood loss (p < 0.05). Postoperative estimated glomerular filtration rate (day 2), length of stay, and complication rate showed no significant differences. The cumulative sum curve was best fit by the equation $\hspace{0.17em}y=-0.0002x^4+0.0568x^3-3.6013x^2+69.011x$, and $R^2=0.8806$, with peak at case 13, and is subsequently delineated into a learning group (1-13 cases) and a skilled group (14-45 cases). The two groups exhibited comparable baseline characteristics. Conclusion: The MP1000 system is effective for partial nephrectomies, with all cases completed effectively. Meanwhile, surgeons with prior experience using the da Vinci Xi system achieve proficiency with the MP1000 after 13 procedures.