Urethral pressure profile (profilometry)

The urethral pressure profile, or profilometry, is a urodynamic test that measures pressures all along the urethra, from the bladder neck to the urethral meatus. It provides a precise assessment of the competence of the urethral sphincter and the quality of the resistance to outflow. The test is performed by slowly withdrawing a measuring catheter through the urethra while recording the pressures. This produces a pressure profile that reveals the maximum closure pressure, the functional length of the urethra and the transmission of abdominal pressures to the urethra. Profilometry is particularly important in the assessment of stress urinary incontinence in women. A low maximum closure pressure (sphincter deficiency) points to a particular type of incontinence and influences the choice of treatment (suburethral sling, artificial sphincter, periurethral injections). This test can be performed at rest and during effort (coughing, straining) to assess the transmission of abdominal pressures to the urethra. Poor transmission is characteristic of urethral hypermobility and a lack of support of the pelvic floor.