The purpose of our investigation was to compare external sphincterotomy, the traditional method of treatment of detrusor-external sphincter dyssynergia (DESD), with two newer methods, balloon dilatation or internal stenting of the external sphincter. Sixty-one spinal cord injured (SCI) men were prospectively evaluated. The indications for treatment were DESD and voiding pressure greater than 60 cmH2O demonstrated during video-urodynamic study. Twenty patients were treated with balloon dilatation of the external sphincter, 26 with an internal stent prosthesis, and 15 with traditional external sphincterotomy. Age and duration of SCI were similar among the three treatment groups. A significant decrease in both voiding pressure and residual urine from presurgery levels persisted during the follow-up period of 3 to 26 months (mean, 15 months) in all three groups. Bladder capacity remained constant, renal function improved or stabilized, and autonomic dysreflexia (AD) improved in all three groups. Balloon dilatation and prosthesis placement are associated with a significantly shorter length of surgery (p = 0.045), length of hospitalization (p = 0.005), decrease in hospitalization cost (p = 0.01), and decrease in hemoglobin postoperatively (p = 0.046) when compared to external sphincterotomy. Complications of stent insertion included device migration (three patients) and secondary bladder neck obstruction (two patients). In the balloon dilatation group, three recurrent sphincter obstructions, one case of bleeding requiring transfusion, and one case of bulbous urethral stricture occurred. After external sphincterotomy, two patients developed recurrent obstruction, two required blood transfusion, and 1 patient noted erectile dysfunction. Balloon dilatation and prosthesis placement both proved to be as effective as external sphincterotomy in the treatment of DESD.(ABSTRACT TRUNCATED AT 250 WORDS)
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