title: Objective assessment of bladder neck elevation and urethral compression at colposuspension.
abstract: OBJECTIVE
  1. To assess whether magnetic resonance imaging and intra-operative measurements are useful in assessing bladder neck elevation and urethral compression at colposuspension; 2. to see if intra-operative measurements could be a substitute for magnetic resonance scan measurements.
  
  
  METHODS
  Prospective, observational study.
  
  
  METHODS
  Urogynaecology Unit, NHS Trust hospital.
  
  
  METHODS
  Seventy-seven women undergoing colposuspension.
  
  
  METHODS
  Bladder neck elevation was assessed using magnetic resonance imaging and measuring the amount of suture bow-stringing intra-operatively. Urethral compression was assessed using magnetic resonance imaging and by two intra-operative measurements: the distance between the medial sutures (with a ruler) and the distance between the urethra and the pubic bone (using paired Hegar dilators).
  
  
  RESULTS
  The assessment of bladder neck elevation and compression against the pubic bone using magnetic resonance imaging was reliable (95% limits of agreement: -7.1mm to +7.1mm and -1.7mm to +3.8mm, correlation coefficient 0.92 and 0.87, respectively). The intra-operative assessment of urethral compression with a ruler was also reproducible at both paravaginal and pectineal sites (95% limits of agreement -2.6mm to +2mm and -2.1mm to +2.4mm, respectively; correlation coefficient 0.99 for both distances). Other intra-operative measurements of bladder neck elevation (suture bow-stringing) and urethral compression (Hegars) did not correlate with equivalent magnetic resonance scan measurements (kappa =-0.046, P = 0.31; kappa = 0.052, P = 0.41, respectively).
  
  
  CONCLUSIONS
  Measurements have been found that can reliably assess bladder neck elevation and urethral compression at colposuspension. These measurements should be suitable for investigating morbidity following colposuspension.
authors.affiliation: Directorate of Obstetrics and Gynaecology, Derriford Hospital, Plymouth, UK.
authors.forename: L
authors.initials: L
authors.lastname: Bombieri
authors.forename: R M
authors.initials: RM
authors.lastname: Freeman
authors.forename: E P
authors.initials: EP
authors.lastname: Perkins
authors.forename: M P
authors.initials: MP
authors.lastname: Williams
authors.forename: S R
authors.initials: SR
authors.lastname: Shaw
mesh_terms: D000328:Adult; D000368:Aged; D001837:Body Weights and Measures; D003251:Constriction, Pathologic; D005260:Female; D006801:Humans; D007430:Intraoperative Care; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D011446:Prospective Studies; D015203:Reproducibility of Results; D014521:Urethra / Q000601:surgery*; D014522:Urethral Diseases / Q000175:diagnosis / Q000601:surgery*; D001743:Urinary Bladder / Q000033:anatomy & histology / Q000601:surgery*; D014550:Urinary Incontinence, Stress / Q000175:diagnosis / Q000601:surgery*; D014621:Vagina / Q000033:anatomy & histology / Q000601:surgery*