title: Sphincteric stent versus external sphincterotomy in spinal cord injured men: prospective randomized multicenter trial.
abstract: OBJECTIVE
  In a prospective randomized multicenter trial we compared the treatment results of conventional external sphincterotomy with those of UroLume sphincteric stent prosthesis placement in men with spinal cord injury and external detrusor-sphincter dyssynergia.
  
  
  METHODS
  We randomized 57 men with spinal cord injury in whom urodynamics verified external detrusor-sphincter dyssynergia into 2 groups to undergo either sphincter defeating procedure. We compared the primary urodynamic parameter of maximum detrusor pressure, and secondary urodynamic parameters of bladder capacity and post-void residual urine volume in men who underwent sphincterotomy or sphincteric stent placement. Parameters were measured preoperatively, and 3, 6, 12 and 24 months postoperatively. Patients completed questionnaires regarding voiding sensation and quality of life issues at each followup visit.
  
  
  RESULTS
  Demographic data of the 26 patients treated with sphincterotomy and the 31 treated with sphincteric stent placement were statistically similar. Preoperatively mean maximum detrusor pressure plus or minus standard deviation in sphincterotomy and stent cases was 98.3 +/- 27.6 and 95.7 +/- 27.7 cm. water, respectively (p = 0.73). At 12 months mean maximum detrusor pressure decreased to 48.9 +/- 16.4 and 52.6 +/- 31.6 cm. water in the sphincterotomy and stent groups, respectively (p = 0). Preoperatively mean bladder capacity in sphincterotomy and stent cases was 245 +/- 158 and 251 +/- 145 ml., respectively (p = 0.87). Bladder capacity did not change significantly in either treatment group throughout followup. Preoperatively mean post-void residual urine volume in the sphincterotomy and stent groups was 212 +/- 163 and 168 +/- 114 ml., respectively (p = 0.33). Residual urine volume decreased in each group at some but not all followup evaluations. The duration of hospitalization was greater for sphincterotomy than stenting (p = 0.036). Six stents required explantation.
  
  
  CONCLUSIONS
  The UroLume stent is as effective as conventional external sphincterotomy for treating external detrusor-sphincter dyssynergia. However, sphincteric stent placement is advantageous because it involves shorter hospitalization and is potentially reversible.
authors.affiliation: Division of Urologic Surgery, University of Pittsburgh, Pennsylvania 15213, USA.
authors.forename: M B
authors.initials: MB
authors.lastname: Chancellor
authors.forename: C
authors.initials: C
authors.lastname: Bennett
authors.forename: A R
authors.initials: AR
authors.lastname: Simoneau
authors.forename: M V
authors.initials: MV
authors.lastname: Finocchiaro
authors.forename: C
authors.initials: C
authors.lastname: Kline
authors.forename: J K
authors.initials: JK
authors.lastname: Bennett
authors.forename: J E
authors.initials: JE
authors.lastname: Foote
authors.forename: B G
authors.initials: BG
authors.lastname: Green
authors.forename: S H
authors.initials: SH
authors.lastname: Martin
authors.forename: R W
authors.initials: RW
authors.lastname: Killoran
authors.forename: J A
authors.initials: JA
authors.lastname: Crewalk
authors.forename: D A
authors.initials: DA
authors.lastname: Rivas
mesh_terms: D000328:Adult; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011446:Prospective Studies; D013119:Spinal Cord Injuries / Q000150:complications*; D015607:Stents; D014549:Urinary Incontinence / Q000209:etiology / Q000601:surgery*; D013520:Urologic Surgical Procedures / Q000379:methods