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Has Sliding-Clip Renorrhaphy Eliminated the Need for Collecting System Repair During Robot-Assisted Partial Nephrectomy?

OBJECTIVE
We evaluated whether single-layer renorrhaphy (SLR) without collecting system (CS) closure is sufficient following robot-assisted partial nephrectomy (RAPN).


PATIENTS AND METHODS
One hundred fifty consecutive patients underwent RAPN by a single surgeon and were prospectively labeled with regard to CS entry during surgery. Patients with CS entry were subdivided into two groups: those with classical renorrhaphy (CR) (i.e., two-layer repair) and those with SLR (i.e., without CS repair). Perioperative variables and outcomes were compared between CR and SLR groups.


RESULTS
Ninety patients had CS entry during RAPN. Of these 90 patients, 64 had CR, and 26 had SLR, with mean ages of 62 and 59 years (p = 0.22), tumor sizes of 3.4 and 3.3 cm (p = 0.61), Mayo Adhesive Probability scores of 1.8 and 1.8 (p = 0.95), and radius, exophytic/endophytic, nearness to CS, and laterality scores of 8.5 and 8.0 (p = 0.16), respectively. Mean warm ischemia times (WITs) were 19.6 and 17.3 minutes (p = 0.04), hospital stays of 3.0 and 2.8 days (p = 0.62), and drain times of 2.9 and 2.7 days (p = 0.65), for the CR and SLR groups, respectively. Using the Clavien-Dindo classification, there were a total of six grade III or higher complications, with no difference between the CR and SLR subgroups (p = 1.0). Renal function using creatinine or glomerular filtration rate as surrogates showed no difference between groups preoperatively or up until 2 years postoperatively.


CONCLUSIONS
Omitting CS repair during RAPN with SLR decreases WIT without altering complications, hospital stay, or drain time. Long-term renal function was not associated with CS repair.