Comparative Analysis of Perioperative Outcomes, Complications, and Early Renal Function After No-Touch Adaptive Versus Conventional Robot-Assisted Partial Nephrectomy for Clinically Localized Renal Tumours

Background: Robot-assisted partial nephrectomy (RAPN) has become the preferred surgical approach for localized renal tumours, yet the optimal surgical technique remains uncertain. Ongoing refinements aim to reduce morbidity while maximizing renal function preservation. In this study, we compared perioperative outcomes, postoperative complications, and early renal function between the no-touch adaptive RAPN technique, designed to minimize vascular and parenchymal trauma, and the conventional approach. Methods: We retrospectively analyzed 387 consecutive patients undergoing RAPN for localized renal tumours between June 2017 and February 2026 at a single tertiary referral centre. Patients were treated with either the no-touch adaptive (n = 178) or conventional (n = 209) technique. The no-touch approach consisted of sutureless off-clamp simple tumour enucleation with incremental haemostasis and on-demand conversion to arterial clamping, tumour enucleoresection, or renorrhaphy when required. The conventional technique consisted of an on-clamp minimal enucleoresection with double-layer renorrhaphy. Completion rate of a fully no-touch procedure was assessed in the study group, and perioperative outcomes, 90-day complications, and renal function at 3 months were compared between the groups. Exploratory multivariable logistic regression identified predictors of postoperative complications. Absolute and relative changes in estimated glomerular filtration rate (eGFR) from baseline were analyzed, and a linear regression model adjusted for baseline eGFR was used to compare postoperative renal function between the groups. Results: Among the 175 evaluable patients after excluding three immediate conversions to radical nephrectomy before tumour excision, a fully no-touch procedure was completed in 153 (87.4%). Compared with conventional RAPN, the no-touch group had a significantly shorter hospital stay (3 vs. 5 days, p < 0.01), lower 90-day readmission rate (0% vs. 4.3%, p = 0.01), fewer overall complications (16.3% vs. 40.7%, p < 0.01), and fewer major complications (3.9% vs. 11%, p = 0.02), with no cases of delayed vascular bleeding. Low tumour complexity and the no-touch technique independently predicted a lower risk of postoperative complications. The median decline in eGFR from baseline to 3 months was significantly smaller in the no-touch group, which also showed a lower rate of clinically meaningful renal function deterioration (eGFR decline ≥ 30%; 1.1% vs. 5.7%, p = 0.03). After adjustment for baseline eGFR, the no-touch adaptive technique was associated with a 5.4 mL/min/1.73 m2 higher 3-month eGFR than the conventional technique (95% CI 3.6–7.2; p < 0.001). Conclusions: Within the limitations of this retrospective comparative study, the no-touch adaptive technique for RAPN was associated with lower perioperative morbidity and better preservation of early renal function than the conventional approach. These findings support further prospective multicentre studies to determine the reproducibility, durability, and clinical relevance of this surgical strategy.