A Study of Dorsal Versus Ventral Buccal Mucosa Graft Onlay for Bulbar Urethroplasty
NCT ID: NCT02634619
Last Updated: 2019-04-25
Study Results
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Basic Information
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TERMINATED
NA
95 participants
INTERVENTIONAL
2016-06-30
2018-11-30
Brief Summary
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Detailed Description
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2. Randomization: The PI will contact the research assistant by email or telephone and communicate the random identification number of the subject and receive the random assignment to ventral or dorsal graft. This will usually occur after the initial clinic visit but certainly before the surgery date. Patients will not be blinded as to their assignment. Surgeons, out of necessity, will not be blinded as well.
3. Treatment/intervention period: Patient will undergo urethroplasty using standard approach and graft will be placed ventrally or dorsally, as assigned. Most patients go home the same day after surgery. A catheter will be left in the urethra for 2-4 weeks as is standard approach for buccal graft urethroplasties.
4. Follow-up (there will be no extra clinic visits, questionnaires, or tests beyond that which the investigators normally do for all patients undergoing urethroplasty):
1. 2-4 weeks: urethral catheter removal and urethrogram to document well-healed suture line
2. 3 and 12 months post-operative clinic visit:
i. cystoscopy ii. PROMs and additional post-operative questionnaires iii. Uroflowmetry and post-void residual urine volume c. Annual visits after year 1: The investigators will typically follow patients annually with no end date after urethroplasty. For publication purposesits has been set to 1 year as the study end date but the investigators will continue to see the patients outside the study protocol after year 1 (so that participants receive the same care as people not in the study) and will perform the following: i. Cystoscopy, if indicated based on abnormalities in ii or iii ii. PROMs and additional post-operative questionnaires iii. Uroflowmetry and post-void residual urine volume
5. Data Safety and Monitoring Both ventral and dorsal buccal mucosa graft are standard of care and all surgeons in this study have performed at least 50-100 of each of these surgeries. Investigators do not anticipate adverse events that are not well known in the literature. Urethroplasty is generally a low risk surgery. Still, any AEs will be monitored by the surgeon and communicated to Dr. Jeremy Myers at The University of Utah, which serves as the coordinating center for this study.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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Ventral Buccal Mucosa Graft Onlay
Standard of care method for repairing urethral strictures
Ventral buccal mucosa onlay urethroplasty
Ventral buccal graft onlay involves a midline perineal incision and retraction of the bulbospongiosum muscle downward to expose the ventral urethral surface. The corpus spongiosum is incised longitudinally to expose the urethral lumen and the incision is extended proximal and distal to the established stricture. The buccal mucosa graft is harvested and trimmed to the length and width of the urethrotomy and the graft is sutured at the proximal and distal apices and a running suture at the lateral margins to establish a tight anastomosis. Ventral placement allows for limited urethral mobilization and easy access, but there is concern about higher likelihood of diverticulum formation and development of other associated complications - such as post void dribbling and ejaculatory dysfunction.
Dorsal Buccal Mucosa Graft Onlay
Standard of care method for repairing urethral strictures
Dorsal buccal mucosa onlay urethroplasty
Dorsal buccal onlay also involves a midline perineal incision. The bulbo-cavernosum and corpora cavernosum are dissected from the bulbar urethra allowing for complete mobilization of the urethra. The urethra is rotated 180 degrees to allow for dorsal access and an incision is made on the dorsal urethra proximal and distal to the stricture location. The buccal graft is harvested and trimmed to the appropriate size of the urethrotomy and spread on the overlying tunica albuginea of the corporal bodies. The urethra is rotated back to allow for suturing of the left mucosal margin to the left margin of the buccal graft and corporal bodies, essentially covering the entire urethral plate. Dorsal placement has potential for a more stable vascular bed for graft sustainability and less spongiosal bleeding, but requires a greater urethral mobilization and longer operative times.
Interventions
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Ventral buccal mucosa onlay urethroplasty
Ventral buccal graft onlay involves a midline perineal incision and retraction of the bulbospongiosum muscle downward to expose the ventral urethral surface. The corpus spongiosum is incised longitudinally to expose the urethral lumen and the incision is extended proximal and distal to the established stricture. The buccal mucosa graft is harvested and trimmed to the length and width of the urethrotomy and the graft is sutured at the proximal and distal apices and a running suture at the lateral margins to establish a tight anastomosis. Ventral placement allows for limited urethral mobilization and easy access, but there is concern about higher likelihood of diverticulum formation and development of other associated complications - such as post void dribbling and ejaculatory dysfunction.
Dorsal buccal mucosa onlay urethroplasty
Dorsal buccal onlay also involves a midline perineal incision. The bulbo-cavernosum and corpora cavernosum are dissected from the bulbar urethra allowing for complete mobilization of the urethra. The urethra is rotated 180 degrees to allow for dorsal access and an incision is made on the dorsal urethra proximal and distal to the stricture location. The buccal graft is harvested and trimmed to the appropriate size of the urethrotomy and spread on the overlying tunica albuginea of the corporal bodies. The urethra is rotated back to allow for suturing of the left mucosal margin to the left margin of the buccal graft and corporal bodies, essentially covering the entire urethral plate. Dorsal placement has potential for a more stable vascular bed for graft sustainability and less spongiosal bleeding, but requires a greater urethral mobilization and longer operative times.
Eligibility Criteria
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Inclusion Criteria
* Male patients with bulbar urethral stricture \> 1 cm in length
* Strictures must predominantly include the proximal and/or mid-bulbar urethra
* Strictures may extend from the mid-bulbar urethra into the distal bulbar urethra
Exclusion Criteria
* Prior urethroplasty
* Artificial urniary Sphincter placement
* Male urethral sling placement
* Rectourethral fistula
* Radiation therapy to the abdomen or pelvis
* Patients with previous hypospadias repair
* lichen sclerosis
* no involvement of the pendulous urethra
18 Years
MALE
No
Sponsors
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University of Minnesota
OTHER
Baylor College of Medicine
OTHER
University of Iowa
OTHER
University of Kansas
OTHER
Central Ohio Urology Group
OTHER
Loyola University Chicago
OTHER
Lahey Clinic
OTHER
University of Washington
OTHER
New York University
OTHER
University of California, San Diego
OTHER
University of Utah
OTHER
University of California, San Francisco
OTHER
Responsible Party
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Benjamin Breyer, MD
Chief of Urology
Principal Investigators
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benjamin n breyer, MD, MAS, FAC
Role: PRINCIPAL_INVESTIGATOR
University of California, San Francisco
Locations
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University of California San Francisco
San Francisco, California, United States
Countries
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References
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Andrich DE, Leach CJ, Mundy AR. The Barbagli procedure gives the best results for patch urethroplasty of the bulbar urethra. BJU Int. 2001 Sep;88(4):385-9. doi: 10.1046/j.1464-410x.2001.02344.x.
Andrich DE, Mundy AR. Substitution urethroplasty with buccal mucosal-free grafts. J Urol. 2001 Apr;165(4):1131-3; discussion 1133-4.
Barbagli G, De Stefani S, Sighinolfi MC, Annino F, Micali S, Bianchi G. Bulbar urethroplasty with dorsal onlay buccal mucosal graft and fibrin glue. Eur Urol. 2006 Sep;50(3):467-74. doi: 10.1016/j.eururo.2006.05.018. Epub 2006 Jun 5.
Barbagli G, Palminteri E, Guazzoni G, Montorsi F, Turini D, Lazzeri M. Bulbar urethroplasty using buccal mucosa grafts placed on the ventral, dorsal or lateral surface of the urethra: are results affected by the surgical technique? J Urol. 2005 Sep;174(3):955-7; discussion 957-8. doi: 10.1097/01.ju.0000169422.46721.d7.
Barbagli G, Palminteri E, Rizzo M. Dorsal onlay graft urethroplasty using penile skin or buccal mucosa in adult bulbourethral strictures. J Urol. 1998 Oct;160(4):1307-9.
Dubey D, Kumar A, Bansal P, Srivastava A, Kapoor R, Mandhani A, Bhandari M. Substitution urethroplasty for anterior urethral strictures: a critical appraisal of various techniques. BJU Int. 2003 Feb;91(3):215-8. doi: 10.1046/j.1464-410x.2003.03064.x.
Dubey D, Kumar A, Mandhani A, Srivastava A, Kapoor R, Bhandari M. Buccal mucosal urethroplasty: a versatile technique for all urethral segments. BJU Int. 2005 Mar;95(4):625-9. doi: 10.1111/j.1464-410X.2005.05352.x.
Elliott SP, Metro MJ, McAninch JW. Long-term followup of the ventrally placed buccal mucosa onlay graft in bulbar urethral reconstruction. J Urol. 2003 May;169(5):1754-7. doi: 10.1097/01.ju.0000057800.61876.9b.
Fichtner J, Filipas D, Fisch M, Hohenfellner R, Thuroff JW. Long-term outcome of ventral buccal mucosa onlay graft urethroplasty for urethral stricture repair. Urology. 2004 Oct;64(4):648-50. doi: 10.1016/j.urology.2004.05.011.
Heinke T, Gerharz EW, Bonfig R, Riedmiller H. Ventral onlay urethroplasty using buccal mucosa for complex stricture repair. Urology. 2003 May;61(5):1004-7. doi: 10.1016/s0090-4295(02)02523-2.
Kane CJ, Tarman GJ, Summerton DJ, Buchmann CE, Ward JF, O'Reilly KJ, Ruiz H, Thrasher JB, Zorn B, Smith C, Morey AF. Multi-institutional experience with buccal mucosa onlay urethroplasty for bulbar urethral reconstruction. J Urol. 2002 Mar;167(3):1314-7.
Kellner DS, Fracchia JA, Armenakas NA. Ventral onlay buccal mucosal grafts for anterior urethral strictures: long-term followup. J Urol. 2004 Feb;171(2 Pt 1):726-9. doi: 10.1097/01.ju.0000103500.21743.89.
Mangera A, Patterson JM, Chapple CR. A systematic review of graft augmentation urethroplasty techniques for the treatment of anterior urethral strictures. Eur Urol. 2011 May;59(5):797-814. doi: 10.1016/j.eururo.2011.02.010. Epub 2011 Feb 24.
Morey AF, McAninch JW. When and how to use buccal mucosal grafts in adult bulbar urethroplasty. Urology. 1996 Aug;48(2):194-8. doi: 10.1016/S0090-4295(96)00154-9.
Pansadoro V, Emiliozzi P, Gaffi M, Scarpone P, DePaula F, Pizzo M. Buccal mucosa urethroplasty in the treatment of bulbar urethral strictures. Urology. 2003 May;61(5):1008-10. doi: 10.1016/s0090-4295(02)02585-2.
Raber M, Naspro R, Scapaticci E, Salonia A, Scattoni V, Mazzoccoli B, Guazzoni G, Rigatti P, Montorsi F. Dorsal onlay graft urethroplasty using penile skin or buccal mucosa for repair of bulbar urethral stricture: results of a prospective single center study. Eur Urol. 2005 Dec;48(6):1013-7. doi: 10.1016/j.eururo.2005.05.003. Epub 2005 May 31.
Wang K, Miao X, Wang L, Li H. Dorsal onlay versus ventral onlay urethroplasty for anterior urethral stricture: a meta-analysis. Urol Int. 2009;83(3):342-8. doi: 10.1159/000241680. Epub 2009 Oct 13.
Wessells H, McAninch JW. Use of free grafts in urethral stricture reconstruction. J Urol. 1996 Jun;155(6):1912-5.
Xu YM, Qiao Y, Sa YL, Wu DL, Zhang XR, Zhang J, Gu BJ, Jin SB. Substitution urethroplasty of complex and long-segment urethral strictures: a rationale for procedure selection. Eur Urol. 2007 Apr;51(4):1093-8; discussion 1098-9. doi: 10.1016/j.eururo.2006.11.039. Epub 2006 Nov 27.
Other Identifiers
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K12DK083021-DvV
Identifier Type: -
Identifier Source: org_study_id
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