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  • Title: Correlation among maximal urethral closure pressure, retrograde leak point pressure, and abdominal leak point pressure in men with postprostatectomy stress incontinence.
    Author: Comiter CV, Sullivan MP, Yalla SV.
    Journal: Urology; 2003 Jul; 62(1):75-8. PubMed ID: 12837426.
    Abstract:
    OBJECTIVES: To assess the correlation among abdominal leak point pressure (ALPP), maximal urethral closure pressure (MUCP), and retrograde leak point pressure (RLPP) in the evaluation of men with stress urinary incontinence (SUI) after radical prostatectomy. METHODS: Patients were evaluated with a self-administered questionnaire regarding pad use and with multichannel videourodynamics. The ALPP, MUCP, and RLPP were compared with each other and with the severity of SUI. RESULTS: The mean ALPP was 49.4 +/- 24.4 cm H(2)O. The mean MUCP was 52.0 +/- 21.1 cm H(2)O. The mean RLPP was 48.0 +/- 13.5 cm H(2)O. No statistically significant difference in the mean values of the three parameters was found. Regression analysis revealed a statistically significant correlation among the three parameters: RLPP versus MUCP, r = 0.59, P <0.005; MUCP versus ALPP, r = 0.75, P <0.0001; and RLPP versus ALPP, r = 0.79, P <0.0001. ALPP, MUCP, and RLPP were each significantly related to pad use. CONCLUSIONS: Intrinsic sphincter deficiency is the primary cause of SUI after radical prostatectomy. Therefore, evaluation of intrinsic sphincter function is important in the treatment of postprostatectomy SUI. In incontinent men after radical prostatectomy, with a dysfunctional bladder neck and proximal sphincter unit, the intrinsic function of this distal sphincter may be assessed equally well by evaluating the resistance to antegrade leakage, retrograde leakage, or profilometric measurement of the urethral closure pressure. RLPP and MUCP offer reliable alternatives to ALPP for the evaluation of postprostatectomy SUI.
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