# Renorrhaphy
Renorrhaphy is the multilayer suture repair of the resection bed.[1](https://link.springer.com/article/10.1007/s00345-026-06679-5) Its goals are hemostasis of the raw resection bed, watertight closure of the collecting system, and repair of the renal defect.[2](https://www.ovid.com/jnls/international-journal-of-surgery/fulltext/10.1016/j.ijsu.2016.05.031~open-partial-nephrectomy-in-renal-cell-cancer-essential-or) It was introduced to minimize postoperative complications through hemostasis and collecting-system closure, and it remains the cornerstone of parenchymal hemostasis and collecting system closure.[3](https://pmc.ncbi.nlm.nih.gov/articles/PMC11933945/) • [1](https://link.springer.com/article/10.1007/s00345-026-06679-5)
| Key fact | Detail |
|---|---|
| Purpose | Hemostasis, watertight collecting-system closure, and repair of the renal defect after tumor excision[2](https://www.ovid.com/jnls/international-journal-of-surgery/fulltext/10.1016/j.ijsu.2016.05.031~open-partial-nephrectomy-in-renal-cell-cancer-essential-or) |
| Typical deep layer | Transected vessels and collecting system repaired with 4-0 absorbable sutures[4](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5996815/) |
| Typical outer layer | Parenchyma closed with 1-0 absorbable interrupted sutures at 1–2 cm pitch, or 0/no. 1 polyglactin sliding-clip sutures at 1 cm intervals[4](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5996815/) • [5](https://www.scielo.br/j/ibju/a/KXTSH6LBvCPgTVvrDWnHPYJ/?format=pdf&lang=en) |
| Biomechanical advantage of sliding clips | Capsule tore at a mean 32.7 N with sliding-clip closure versus 11.3 N with simple tied suture[6](https://digitalcommons.wustl.edu/cgi/viewcontent.cgi?article=3830&context=open_access_pubs) |
| Functional trade-off | Omitting renorrhaphy favored eGFR preservation (WMD -4.19 mL/min favoring omission) but raised urine-leak rates in open surgery (20% vs 2.3%)[3](https://pmc.ncbi.nlm.nih.gov/articles/PMC11933945/) • [4](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5996815/) |
| Guideline status | Urological guidelines do not provide recommendations about the optimal renorrhaphy technique[7](https://iris.polito.it/handle/11583/2811477) |
## How it works
Renorrhaphy is a layered repair, not a single stitch line. The deep layer determines urinary watertightness: urinary leakage depends on meticulous deep suture of the calyceal mucosa, because topical agents applied to the external parenchymal surface have no sealing properties for the collecting system.[1](https://link.springer.com/article/10.1007/s00345-026-06679-5) The outer layer reapproximates the parenchyma and capsule to secure hemostasis of the raw resection bed.
## How it is done
In a described open technique, after ice-slush cooling and resection with a 2–5 mm margin, the transected vessels are ligated and the opened collecting system is repaired with 4-0 absorbable sutures; the parenchyma is then closed with blind 1-0 absorbable interrupted sutures placed at a 1–2 cm pitch, with oxidized cellulose ([Surgicel](https://www.edgepedia.org/surgicel)) stuffed into the defect.[4](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5996815/) In open surgery the sequence is vascular control, incision of the capsule with a 5 mm margin, clamping of the renal artery with a bulldog clamp, tumor resection, and ligation or clipping of visible vessels before closure.[8](https://www.urology-textbook.com/open-partial-nephrectomy.html)
## Origin
Gustav Simon performed the first successful nephrectomy in 1869 in [Heidelberg](https://www.edgepedia.org/heidelberg), Germany.[9](https://onlinelibrary.wiley.com/doi/10.1111/iju.15658) A partial nephrectomy removing a third of a kidney was performed during an attempt to excise a perirenal fibroadenoma.[2](https://www.ovid.com/jnls/international-journal-of-surgery/fulltext/10.1016/j.ijsu.2016.05.031~open-partial-nephrectomy-in-renal-cell-cancer-essential-or) Three years later, an open partial nephrectomy, for an angiosarcoma, was performed in the same clinic where Simon had performed the first radical nephrectomy 21 years earlier.[2](https://www.ovid.com/jnls/international-journal-of-surgery/fulltext/10.1016/j.ijsu.2016.05.031~open-partial-nephrectomy-in-renal-cell-cancer-essential-or) Published sources disagree on which operation counts as the first deliberate partial nephrectomy, Simon's 1870 case or Czerny's 1887 case. The sliding-clip renorrhaphy technique was reported by Benway and colleagues in European Urology in 2009.[10](https://doi.org/10.1016/j.eururo.2008.12.028)
## Variants
**Sliding-clip renorrhaphy** is a documented variant for robotic surgery.[10](https://doi.org/10.1016/j.eururo.2008.12.028) A 0 or no. 1 polyglactin suture on a CT needle is cut to 15 cm, a knot is tied at the end, a LapraTy clip is placed above the knot, and a Weck Hem-O-Lock clip follows.[6](https://digitalcommons.wustl.edu/cgi/viewcontent.cgi?article=3830&context=open_access_pubs) • [5](https://www.scielo.br/j/ibju/a/KXTSH6LBvCPgTVvrDWnHPYJ/?format=pdf&lang=en) [Sutures](https://www.edgepedia.org/sutures) are placed through the capsule margins at 1 cm intervals; the console surgeon slides the Hem-O-Lock clip toward the repair zone to tighten the closure under direct control, then locks it with a LapraTy clip.[5](https://www.scielo.br/j/ibju/a/KXTSH6LBvCPgTVvrDWnHPYJ/?format=pdf&lang=en) The technique has since been applied to open and robotic-assisted partial nephrectomy with several minor modifications.[9](https://onlinelibrary.wiley.com/doi/10.1111/iju.15658) A thesis excerpt attributes an earlier sliding-clip description to Agarwal and colleagues in 2007, involving fixing the entry and exit points of the suture in the parenchyma with Weck Hem-o-lok clips[11](https://minerva-access.unimelb.edu.au/rest/bitstreams/2875b49a-f434-4278-b9c6-0c68e56f9266/retrieve); the attribution is not settled between the 2007 and 2009 accounts.
**Sutureless and closure-omitting approaches** omit all or part of the repair. A non-renorrhaphy open technique places a Tachosil tissue-sealing sheet in the resected bed and compresses it manually for 5 minutes after unclamping.[4](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5996815/) A sutureless, purely off-clamp robotic technique avoids both hilar clamping and renorrhaphy, relying on selective control of feeding arteries during tumor enucleation and monopolar cauterization of the parenchymal breach; the same group had reported the feasibility of sutureless laparoscopic partial nephrectomy for small exophytic tumors in 2012.[12](https://www.mdpi.com/2072-6694/15/3/698) A cortical renorrhaphy-omitting robotic approach resects the tumor with a thin parenchymal margin while preserving renal pelvic structures, on the rationale that pseudoaneurysm formation is reduced.[13](https://www.jstage.jst.go.jp/article/jserjje/38/2/38_206/_article/-char/en) The R-BEP technique consists of a single layer of monofilament absorbable running barbed sutures reinforced by elongated PTFE pledgets approximately 8 to 10 mm wide, cut to match the resection bed, with bites placed 3 to 5 mm apart; in 55 patients, complete hemostasis and urostasis were achieved in all cases without additional clamping.[14](https://link.springer.com/article/10.1245/s10434-025-18090-2)
## Applications
Renorrhaphy is applied in open, laparoscopic, and robotic partial nephrectomy after tumor excision.[4](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5996815/) • [10](https://doi.org/10.1016/j.eururo.2008.12.028) A 2024 Nature Reviews Urology review frames renorrhaphy as management of the partial nephrectomy defect, whose pertaining complications are hemorrhage and urinary leak, and surveys advances in sliding-clip techniques aimed at function preservation.[15](https://www.nature.com/articles/s41585-024-00906-7)
## Limitations and alternatives
A PROSPERO-registered meta-analysis (CRD42022293977) of 634 patients from 5 retrospective studies found that non-renorrhaphy (sutureless) closure favored eGFR preservation, with a weighted mean difference of -4.19 mL/min (95% CI -7.64 to -0.73, p < 0.001) and no significant difference in complications (RR 1.31, 95% CI 0.61–2.81).[3](https://pmc.ncbi.nlm.nih.gov/articles/PMC11933945/) The same meta-analysis found that omitting renorrhaphy shortened operating time (WMD -29.08 min, 95% CI -33.06 to -25.10) and warm ischemia time (WMD -6.17 min, 95% CI -6.99 to -5.36), with no significant difference in blood loss.[3](https://pmc.ncbi.nlm.nih.gov/articles/PMC11933945/) Within renorrhaphy itself, a pooled analysis favored single-layer over double-layer closure for eGFR preservation, while interrupted and running sutures showed no significant GFR difference.[7](https://iris.polito.it/handle/11583/2811477)
In a propensity-matched analysis of 43 pairs of open partial nephrectomies for T1a tumors, renal artery pseudoaneurysm occurred in 6 renorrhaphy cases versus 0 non-renorrhaphy cases (13% vs 0%, p = 0.02), while urine leakage occurred in 9 non-renorrhaphy cases versus 1 renorrhaphy case (20% vs 2.3%, p = 0.02).[4](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5996815/) The authors attribute pseudoaneurysms to renorrhaphy damaging intraparenchymal vessels and compressing parenchyma.[4](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5996815/) Adjunctive topical hemostatic agents add no measurable benefit: a 2026 meta-analysis of 15 studies (3,408 patients) found no significant difference versus renorrhaphy alone for transfusion, hemorrhagic complications, or urinary leakage.[1](https://link.springer.com/article/10.1007/s00345-026-06679-5) A randomized controlled noninferiority trial has assessed whether sutureless purely off-clamp robotic partial nephrectomy is noninferior to renorrhaphy in terms of surgical quality.[16](https://kidney.uroonco.uroweb.org/publication/sutureless-purely-off-clamp-robotic-partial-nephrectomy-evidence-from-a-randomized-controlled-noninferiority-trial/)
Urological guidelines do not provide recommendations about the optimal renorrhaphy technique[7](https://iris.polito.it/handle/11583/2811477), and no published source states a definitive rule for when closure can be omitted, so the choice between renorrhaphy, partial closure, and sutureless techniques rests on tumor anatomy and the published comparisons.
## References
1. [Adjunctive topical hemostatic agents combined with renorrhaphy versus renorrhaphy alone during partial nephrectomy: a systematic review and meta-analysis](https://link.springer.com/article/10.1007/s00345-026-06679-5)
2. [Open partial nephrectomy in renal cell cancer – essential or obsolete?](https://www.ovid.com/jnls/international-journal-of-surgery/fulltext/10.1016/j.ijsu.2016.05.031~open-partial-nephrectomy-in-renal-cell-cancer-essential-or)
3. [Do hilar clamping and renorrhaphy influence postoperative renal function after partial nephrectomy?](https://pmc.ncbi.nlm.nih.gov/articles/PMC11933945/)
4. [Comparison of perioperative outcomes with or without renorrhaphy during open partial nephrectomy: A propensity score-matched analysis](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5996815/)
5. [Robotic-Assisted Partial Nephrectomy: Surgical Technique Using a 3-Arm Approach and Sliding-clip Renorrhaphy](https://www.scielo.br/j/ibju/a/KXTSH6LBvCPgTVvrDWnHPYJ/?format=pdf&lang=en)
6. [Sliding-clip renorrhaphy provides superior closing tension during robot-assisted partial nephrectomy](https://digitalcommons.wustl.edu/cgi/viewcontent.cgi?article=3830&context=open_access_pubs)
7. [Systematic Review and Pooled Analysis of the Impact of Renorrhaphy Techniques on Renal Functional Outcome After Partial Nephrectomy](https://iris.polito.it/handle/11583/2811477)
8. [Open Partial Nephrectomy: Surgical Steps and Complications](https://www.urology-textbook.com/open-partial-nephrectomy.html)
9. [An overview of renorrhaphy techniques for partial nephrectomy](https://onlinelibrary.wiley.com/doi/10.1111/iju.15658)
10. [Brian M. Benway and colleagues (2009). Robotic Partial Nephrectomy with Sliding-Clip Renorrhaphy: Technique and Outcomes. European Urology.](https://doi.org/10.1016/j.eururo.2008.12.028)
11. [Thesis excerpt crediting Agarwal et al. 2007 for sliding-clip renorrhaphy](https://minerva-access.unimelb.edu.au/rest/bitstreams/2875b49a-f434-4278-b9c6-0c68e56f9266/retrieve)
12. [Sutureless Purely Off-Clamp Robot-Assisted Partial Nephrectomy: Avoiding Renorrhaphy Does Not Jeopardize Surgical and Functional Outcomes](https://www.mdpi.com/2072-6694/15/3/698)
13. [Ideal RAPN without cortical renorrhaphy](https://www.jstage.jst.go.jp/article/jserjje/38/2/38_206/_article/-char/en)
14. [A New Renorrhaphy Technique Using Barbed Sutures and Elongated Pledgets for Robotic Partial Nephrectomy](https://link.springer.com/article/10.1245/s10434-025-18090-2)
15. [Advances in sliding clip renorrhaphy for partial nephrectomy](https://www.nature.com/articles/s41585-024-00906-7)
16. [Sutureless purely off-clamp robotic partial nephrectomy: Evidence from a randomized controlled noninferiority trial](https://kidney.uroonco.uroweb.org/publication/sutureless-purely-off-clamp-robotic-partial-nephrectomy-evidence-from-a-randomized-controlled-noninferiority-trial/)
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*Topic: Encyclopedia › Life and health › Human health and medicine › Clinical assessment and procedures › Surgery and surgical specialties › Urologic surgery procedures*
*Initially written Sep 29, 2026 · Edited: Oct 15, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license