title: Evaluation of stress urinary incontinence by computer-aided vector-based perineal ultrasound.
abstract: BACKGROUND
  In this study, we compared the differences in dynamic changes of the bladder neck between women with and without urodynamic stress incontinence by computer-aided vector-based perineal ultrasound.
  
  
  METHODS
  The function and morphology of the lower urinary tract were assessed in 48 women with or without urodynamic stress incontinence by urodynamic study and computer-aided vector-based perineal ultrasound.
  
  
  RESULTS
  Patients in the urodynamic stress incontinence group had a significantly higher parity and higher prevalence of funneling of the bladder neck than participants in the control group (p<0.05). After adjusting for parity, women with a corrected bladder neck movement > or =10 mm were 9.0 times more at risk of having urodynamic stress incontinence than women with a corrected bladder neck movement <10 mm (p < 0.05). If we used corrected bladder neck movement > or =10 mm as the cut-off point for diagnosis of urodynamic stress incontinence, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were 77.8%, 66.7%, 87.5%, 50%, and 75%, respectively.
  
  
  CONCLUSIONS
  The increase in corrected bladder neck movement is associated with functional impairment of urethral closure. Computer-aided vector-based perineal ultrasound is valuable in assessing anatomic change of the bladder neck, but it is not a sensitive tool for predicting urodynamic stress incontinence.
authors.affiliation: Department of Obstetrics and Gynecology, China Medical University Hospital, School of Medicine, China Medical University, Taichung, Taiwan. d888208@ms45.hinet.net
authors.forename: Huey-Yi
authors.initials: HY
authors.lastname: Chen
authors.forename: Yu-Len
authors.initials: YL
authors.lastname: Huang
authors.forename: Yao-Ching
authors.initials: YC
authors.lastname: Hung
authors.forename: Wen-Chi
authors.initials: WC
authors.lastname: Chen
mesh_terms: D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008875:Middle Aged; D011237:Predictive Value of Tests; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D014550:Urinary Incontinence, Stress / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D014563:Urodynamics / Q000502:physiology