Carbon Dioxide Urethral Pressure Profilometry Before and After External Sphincterotomy in Spinal Cord Injury Patients

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Abstract
Spinal cord injury patients (7) were studied before and after transurethral external sphincterotomy with combined electromyographic [EMG] and gas urethral pressure profilometry. The technique was simple, rapid, accurate and reproducible in evaluating the completeness of external sphincterotomy. A significant reduction in maximum urethral closure pressure, and in the residual urine volume, was a consistent finding after sphincterotomy. The EMG profile showed evidence of periurethral striated muscle activity preoperatively in 2 patients with lower motor neuron lesions in whom the bulbocavernosus reflex was not elicited. Absence of the bulbocavernosus reflex did not eliminate sphincter reflex activity.

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