Original research| Volume 96, ISSUE 4, P614-619, April 2015

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Treatment of Detrusor External Sphincter Dyssynergia Using Ultrasound-Guided Trocar Catheter Transurethral Botulinum Toxin A Injection in Men With Spinal Cord Injury

Published:October 24, 2014DOI:



      To evaluate the effects of transrectal ultrasound-guided trocar catheter transurethral botulinum toxin A (BTX-A) injection into the external urethral sphincter (EUS) for treating detrusor external sphincter dyssynergia (DESD) in men with spinal cord injury (SCI).


      Descriptive study.


      Hospital rehabilitation department.


      Patients (N=15; mean age, 40.5y; range, 22–64y) with suprasacral SCI with confirmed DESD determined by urodynamic study.


      A single dose of 100U BTX-A was injected into the EUS via transrectal ultrasound-guided trocar catheter transurethral injection.

      Main Outcome Measures

      Maximal detrusor pressure, detrusor leak point pressure, maximal pressure on static urethral pressure profilometry, postvoid residual volume, and maximal flow rate.


      After BTX-A transurethral injection, 4 (28.5%) patients showed an excellent result and 7 (46.7%) patients showed an improved result, whereas 4 (28.5%) patients experienced treatment failure. The overall success rate was 75.2%. We observed a significant decrease in static urethral pressure (P<.05) and detrusor leak point pressure after treatment (P<.05), but not in detrusor pressure. The postvoid residual volume were significantly decreased in the fourth week after treatment (P<.05).


      Transrectal ultrasound-guided trocar catheter transurethral BTX-A injection into the EUS effectively suppresses or ameliorates DESD. A potential advantage of the method is that ultrasound guidance may not be necessary in the next injection.


      List of abbreviations:

      BTX-A (botulinum toxin A), CIC (clean intermittent catheterization), DESD (detrusor external sphincter dyssynergia), EUS (external urethral sphincter), SCI (spinal cord injury)
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