Objective: Sphincterotomy is a well-established therapeutic option in male patients with neurogenic bladder dysfunction and detrusor-sphincter-dyssynergia due to spinal cord lesions. Indication and prediction of treatment outcome, however, are mainly based on clinical parameters. We analyzed the clinical usefulness of preoperative urodynamic evaluation for the prediction of success in patients undergoing external sphincterotomy. Materials and Methods: In a retrospective study, residual urine, retrograde perfusion pressure (RESP) and detrusor leak point pressure (DLPP) in 62 male patients with spinal cord injury were assessed before sphincterotomy. Data were compared to surgical success evaluated by postoperative DLPP and residual urine. Results: Sphincterotomy was successful in 85.4% of our patients. In multivariate analysis, both preoperative DLPP and RESP were superior to measurement of residual urine concerning prediction of surgical success. However, these differences were not statistically significant. Conclusion: To our knowledge, this is the first study to evaluate preoperative predictors for surgical success in patients undergoing sphincterotomy. Although urodynamic evaluation is strongly advised prior to surgery in patients with spinal cord lesions, it improves prediction of success only marginally.

Keywords:
Neurogenic bladder, Spinal cord injury, Sphincterotomy, Detrusor leak point pressure
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© 2009 S. Karger AG, Basel
2009
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