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Int Urol Nephrol. 2012 Feb;44(1):125-32. doi: 10.1007/s11255-011-9967-0. Epub 2011 Apr 27.

Impact of newer unidirectional and bidirectional barbed suture on vesicourethral anastomosis during robot-assisted radical prostatectomy and its comparison with polyglecaprone-25 suture: an initial experience.

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Department of Urology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.



To evaluate impact of unidirectional barbed suture on vesicourethral anastomosis (VUA) during robot-assisted radical prostatectomy (RARP) and its comparison with Polyglecaprone-25 suture.


The study was initiated as pilot study; the participants were grouped into three based on the suture material used for VUA, i.e., monofilament Polyglecaprone-25 (group 1), unidirectional barbed Glycolic acid-trimethylene carbonate (group 2), and bidirectional barbed Polyglycolic acid-polycaprolactone (group 3), respectively. Group 1 was included retrospectively and the latter two prospectively. All cases were operated upon by the same surgeon, proficient in RARP. Patient-demographics, intraoperative and peri-operative data were collected. Our technique of mucosa-to-mucosa VUA is carried out in a choreographed manner using unibarbed suture.


Fifty-five patients were included; 25 each in group 1 and 2. The group 3 was prematurely closed after 5 cases due to perceived inappropriateness of needle characteristics of the suture material. Therefore, the statistical analysis was performed between group 1 and 2 only. Preoperative characteristics including age, PSA, clinical stage, and biopsy grade were similar between the groups. The anastomosis time was significantly less in group 2 (8.4 ± 1.7 min vs. 14.3 ± 4.8 min; P = 0.0001; t test). Postoperative hospital stay was less in group 2 (2.7 ± 1.1 days vs. 1.9 ± 0.8 days; P = 0.023; Mann-Whitney U). None of the patient had presented with urinary leaks, urinary retention, or anastomotic strictures at follow-up of 6 months.


VUA with unidirectional barbed suture is safe and takes less time compared to monofilament suture as repeated cinching; help of assistance and knot tying are not required by virtue of its self-retaining characteristics.

[Indexed for MEDLINE]

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