title: Clinical experience with urethral retro-resistance pressure measurement: a prospective pre- and postoperative evaluation in women with stress urinary incontinence.
abstract: OBJECTIVE
  To identify possible correlations of urethral retro-resistance pressure (URP) with clinically and urodynamically proven stress urinary incontinence (SUI) and the outcome of anti-incontinence surgery.
  
  
  METHODS
  URP was measured using the Monitorr system in women with clinically and urodynamically proven SUI without prolapse before and after anti-incontinence surgery (colposuspension n = 8, tension-free vaginal tape n = 6, tension-free transobturator tape n = 34).
  
  
  RESULTS
  Forty-eight women (mean age 61.8 +/- 8.9 years) were evaluated preoperatively and on average 10 weeks postoperatively. Mean URP was 75.6 +/- 20.8 cm H(2)O preoperatively versus 75.4 +/- 17.9 cm H(2)O postoperatively (P = 0.898). The type of anti-incontinence surgery performed had no significant effect on postoperative URP. While no association was found between age and URP (P = 0.35), there was a positive correlation between URP and body mass index (BMI; r = 0.49, P = 0.0004). There was no correlation of URP with the preoperative pad test (P = 0.17) and urethral closure pressure at rest (P = 0.51). Finally, URP did not correlate significantly with the preserved length of the continence zone (0-1/3-2/3-3/3) as determined by the urethral stress profile (P = 0.37-0.72) or with the objective cure rate (negative pad test).
  
  
  CONCLUSIONS
  Preoperative URP does not correlate with SUI in all women, has no predictive value, and does not correlate with the outcome of anti-incontinence surgery. However, there seems to be an association with biomechanical factors such as obesity, which may open up a new area of application for URP measurement in urogynecologic diagnosis.
authors.affiliation: Department of Urogynecology, German Pelvic Floor Center, St. Hedwig Hospitals, Grosse Hamburger Strasse 5-11, D-10115 Berlin, Germany. r.tunn@alexius.de
authors.forename: Ralf
authors.initials: R
authors.lastname: Tunn
authors.forename: Juliane
authors.initials: J
authors.lastname: Marschke
authors.forename: Bettina
authors.initials: B
authors.lastname: Wildt
authors.forename: Annett
authors.initials: A
authors.lastname: Gauruder-Burmester
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008875:Middle Aged; D011184:Postoperative Period; D011795:Surveys and Questionnaires; D016896:Treatment Outcome; D014463:Ultrasonography; D014521:Urethra / Q000000981:diagnostic imaging / Q000502:physiology*; D001743:Urinary Bladder / Q000503:physiopathology; D014550:Urinary Incontinence, Stress / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery*; D014563:Urodynamics / Q000502:physiology*; D013520:Urologic Surgical Procedures