Transrectal ultrasound-guided transperineal botulinum toxin a injection to the external urethral sphincter for treatment of detrusor external sphincter dyssynergia in patients with spinal cord injury.

OBJECTIVE

To evaluate the effects of a single transrectal ultrasound (TRUS)-guided transperineal injection of botulinum toxin A (BTX-A) to the external urethral sphincter (EUS) for treating detrusor external sphincter dyssynergia (DESD).

DESIGN

Descriptive study.

SETTING

Rehabilitation hospital affiliated with a medical university.

PARTICIPANTS

Patients (N=18) with suprasacral spinal cord injury who had DESD confirmed on video-urodynamic study.

INTERVENTIONS: A single dose of 100U BTX-A was applied into the EUS via TRUS-guided transperineal route injection.

MAIN OUTCOME MEASURES: Maximal detrusor pressure, detrusor leak-point pressure, integrated electromyography (iEMG), maximal pressure on static urethral pressure profilometry, and postvoiding residuals.

RESULTS

There were significant reductions in iEMG (P=.008) and static (P=.012) and dynamic urethral pressure (P=.023), but not in detrusor pressure and detrusor leak-point pressure after treatment. Postvoiding residuals also significantly decreased in the first and second month after treatment (P<.012).

CONCLUSIONS

TRUS-guided transperineal injection of BTX-A has beneficial effects in treating DESD.