Perfusion sphincterometry for objective evaluation of postprostatectomy intrinsic sphincter deficiency

Area of Science:

• Urology
• Surgical Complications
• Diagnostic Techniques

Background:

• Male urinary incontinence can occur after prostate surgery (TURP, RP).
• Intrinsic sphincter deficiency (ISD) is a common cause of post-prostatectomy incontinence.
• Objective assessment of sphincter function is crucial for diagnosis and management.

Purpose of the Study:

• To evaluate the utility of perfusion sphincterometry (PS) for assessing lower urinary sphincter competence.
• To measure retrograde urethral perfusion pressure (RUPP) in patients with varying continence status after prostatectomy.
• To compare RUPP values between continent and incontinent post-prostatectomy patients.

Main Methods:

• Retrospective and prospective analysis of 60 neurologically normal patients.
• Patients divided into three groups: continent (no surgery), continent (post-surgery), and incontinent (post-surgery).
• Perfusion sphincterometry (PS) used to measure retrograde urethral perfusion pressure (RUPP); filling cystometrogram (CMG) performed for incontinent patients.

Main Results:

• Mean RUPP was 101 cm H2O (continent, no surgery), 77 cm H2O (continent, post-surgery), and 36 cm H2O (incontinent, post-surgery).
• Statistically significant differences in RUPP observed between all groups (P <0.001).
• No significant difference in RUPP between TURP and RP subgroups within groups 2 and 3.

Conclusions:

• Perfusion sphincterometry (PS) is a simple and accurate method for evaluating lower sphincter competence.
• Post-prostatectomy stress incontinence is associated with a significant decrease in RUPP.
• PS, alongside cystourethroscopy and CMG, aids in evaluating post-prostatectomy incontinence.