Sutureless renorrhaphy is noninferior to conventional renorrhaphy for trifecta achievement in robot-assisted partial nephrectomySutureless Technique Shows No Difference in Renal Cancer Surgery

Journal of robotic surgery Published September 9, 2026 Study authors: Zeng Xiaofu, Xu Xiaofeng, Luo Jingxian, Fu Guangqing PubMed ↗ DOI ↗ Editorial oversight: Dr. Julia Lee, PhD · Oncology, Genomics & Drug Development

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Key Takeaway

Note that sutureless renorrhaphy is noninferior but not superior to conventional renorrhaphy for trifecta achievement.

This meta-analysis evaluated the efficacy of sutureless renorrhaphy compared to conventional renorrhaphy in 787 patients undergoing robot-assisted off-clamp partial nephrectomy (RAPN). The primary outcome, trifecta achievement, met noninferiority criteria in randomized controlled trials (RR 0.97; 95% CI 0.92-1.04). While propensity score matched studies suggested a favorable trend for the sutureless approach (RR 1.26; 95% CI 1.05-1.52), these findings are subject to intraoperative treatment-selection bias.

Secondary outcomes showed a smaller perioperative eGFR decline in the sutureless group (MD -3.89; 95% CI -6.16 to -1.62). However, no statistically significant differences were found for eGFR at 3 months, major complications, blood transfusion, or positive surgical margins.

The authors noted substantial heterogeneity (I2 = 86.5%) and highlighted that urinary and vascular complications were sparsely reported. Consequently, evidence is insufficient to determine the impact of sutureless renorrhaphy on specific complications or long-term renal function. Clinical practice relevance is limited to the noninferiority of the sutureless technique; superiority is not established.

Researchers looked at how a sutureless technique compares to traditional methods for closing the kidney during robot-assisted surgery for renal cancer. The study included 787 patients to see if the sutureless method changed the success rate of the surgery or the health of the kidney.

The results showed that the sutureless method was not significantly different from the traditional method in terms of overall surgical success. However, the sutureless group did show a smaller decline in kidney function immediately after surgery. At the three-month follow-up, there was no significant difference in kidney function between the two groups.

Because the study had some limitations, such as inconsistent reporting on specific complications, the results are not definitive. While the sutureless method is shown to be a safe alternative to traditional stitching, it is not proven to be better. Patients and doctors can view it as a comparable option for kidney closure during surgery.

What this means for you:

Sutureless kidney closure is a comparable alternative to traditional stitching for renal cancer surgery.

Common questions

Is the sutureless technique safe for kidney surgery?

The study found no statistically significant differences in major complications, blood transfusions, or positive surgical margins between the sutureless and traditional methods. While the sutureless approach is considered noninferior, there is not enough evidence to determine its specific effects on urinary or vascular complications.

Does the sutureless method improve kidney function?

The sutureless group showed a smaller decline in kidney function immediately after surgery compared to the traditional group. However, at the three-month follow-up, there was no significant difference in kidney function between the two groups.

Is the sutureless method better than traditional stitching?

The study did not find that the sutureless approach was superior to traditional methods. While some data suggested a favorable trend, the evidence is not sufficient to claim it is better. You should discuss these options with your surgeon.

Study Details

Study typeMeta analysis

Sample sizen = 787

EvidenceLevel 1

Follow-up3.0 mo

PublishedSep 2026

PMID42704544

View Original Abstract ↓

BACKGROUND: The necessity of routine parenchymal renorrhaphy during off-clamp robot-assisted partial nephrectomy (RAPN) remains uncertain. This study aimed to compare perioperative, functional, safety, and oncological outcomes between sutureless and conventional renorrhaphy. METHODS: We conducted a systematic review and meta-analysis following PRISMA 2020 guidelines. Comparative studies evaluating sutureless versus conventional renorrhaphy during purely off-clamp RAPN were included. Trifecta achievement was the primary outcome. Random-effects models were used for pooled analyses, with subgroup analysis according to study design. RESULTS: Four studies involving 787 patients, including one randomized controlled trial (RCT) and three propensity score-matched (PSM) studies, were included. The overall pooled estimate showed no statistically significant difference in Trifecta achievement (RR 1.17, 95% CI 0.97-1.41), with substantial heterogeneity (I² = 86.5%). The PSM studies favored the sutureless approach (RR 1.26, 95% CI 1.05-1.52), whereas the RCT yielded an RR of 0.97 (95% CI 0.92-1.04) and met the prespecified noninferiority criterion without demonstrating superiority. The sutureless approach was associated with a smaller perioperative eGFR decline (MD - 3.89, 95% CI - 6.16 to - 1.62), while no significant difference was observed in eGFR at 3 months. No statistically significant differences were identified in major complications, blood transfusion, or positive surgical margins; urinary and vascular complications were sparsely reported. CONCLUSIONS: In selected patients undergoing purely off-clamp RAPN, randomized evidence supports the noninferiority of a strategy that omits routine parenchymal renorrhaphy while permitting clinically necessary selective repair, but does not demonstrate superiority. Favorable estimates from PSM studies remain vulnerable to intraoperative treatment-selection bias. Current evidence is insufficient to determine whether omission of renorrhaphy affects urinary complications, long-term renal function, or oncological outcomes. REGISTRATION: This systematic review was registered prospectively in PROSPERO (CRD420261435995).

Sutureless renorrhaphy is noninferior to conventional renorrhaphy for trifecta achievement in robot-assisted partial nephrectomySutureless Technique Shows No Difference in Renal Cancer Surgery

Common questions

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Sutureless renorrhaphy is noninferior to conventional renorrhaphy for trifecta achievement in robot-assisted partial nephrectomySutureless Technique Shows No Difference in Renal Cancer Surgery

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