[CHARACTERISTICS OF STRESS URINARY INCONTINENCE AFTER PELVIC ORGAN PROLAPSE SURGERY].

(Objective) We examined the morphology and function of lower urinary tract in order to know characteristics of stress urinary incontinence after pelvic organ prolapse (POP) surgery. (Methods) One hundred twenty-five female patients (mean age 64.9 years, mean parity 2.2, mean body mass index (BMI) 24.4) were performed anti-incontinence surgery for stress urinary incontinence. Sixty-one of 125 patients underwent POP surgery before anti-incontinence surgery. They were divided into groups as follows: post-POP surgery group and non-POP surgery group. All patients underwent one-hour pad test, chain cystourethrography (chain CG), Urodynamic studies (UDS) as preoperative assessment. Midurethral sling procedure was performed as an anti-incontinence surgery. Preoperative assessment criteria and postoperative treatment results were compared between two groups. (Results) Post-POP surgery group showed a significantly greater amount of urinary leakage per 1-hour pad test than non-POP surgery group (65.2±74.3 g vs 14.3±25.2 g, p<0.05). The diagnosis of type III urinary stress incontinence (Blaivas' classification) was more frequently diagnosed in post-POP surgery group than non-POP surgery group (50.0% vs 25.0%, p<0.05). Maximum urethral closure pressure (MUCP) and functional profile length (FPL) of post-POP surgery group were lower than those of non-POP surgery group (27.4±9.2 vs 35.7±14.7, p<0.05, 27.3±4.7 vs 29.9±5.0, p<0.05). Postoperative treatment results of post-POP surgery group were worse than those of non-POP surgery group (78.7% vs 92.2%, p<0.05). (Conclusions) Post-POP surgery group showed more severe urinary incontinence, lower urinary function and lower cure rate. Therefore we should keep in mind when approaching urinary stress incontinence.