title: Accuracy of bladder scanning in the assessment of postvoid residual volume.
abstract: OBJECTIVE
  To compare the accuracy of the 3D portable ultrasound with catheterization in the assessment of postvoid residual (PVR) urine volume among women in the urogynaecology clinic.
  
  
  METHODS
  A prospective study was performed, assessing 101 women. After the patient voided four ultrasound (US) assessments were carried out using the BladderScan BVI 3000; the patient was then catheterized. The reproducibility of the US measurements and the difference between the two methods were assessed using Bland and Altman plots. The strength of the relationship was measured by a simple Pearson correlation coefficient.
  
  
  RESULTS
  The results showed that 3D scanner measurements were highly reproducible and were also found to correlate significantly with catheterized volume (r=0.79, 95% CI 0.70-0.85, P<0.001). The mean difference between the two methods was 12.9 mL (95% CI 5.5-20.2 mL, P<0.001).
  
  
  CONCLUSIONS
  In determining PVR volumes, the portable ultrasound BladderScan BVI 3000 is an accurate alternative to bladder catheterization.
authors: Department of Obstetrics and Gynecology, Division of Urogynecology and Pelvic Reconstructive Surgery, The Ottawa Hospital, Ottawa ON.
authors: Ghadeer
authors: G
authors: Al-Shaikh
authors: Department of Obstetrics and Gynecology, Hôpital Sainte-Justine, Montreal QC.
authors: Annick
authors: A
authors: Larochelle
authors: Department of Obstetrics and Gynecology, Division of Urogynecology and Pelvic Reconstructive Surgery, The Ottawa Hospital, Ottawa ON.
authors: Craig E
authors: CE
authors: Campbell
authors: Department of Obstetrics and Gynecology, Division of Urogynecology and Pelvic Reconstructive Surgery, The Ottawa Hospital, Ottawa ON.
authors: Joyce
authors: J
authors: Schachter
authors: Department of Obstetrics and Gynecology, Division of Urogynecology and Pelvic Reconstructive Surgery, The Ottawa Hospital, Ottawa ON.
authors: Kevin
authors: K
authors: Baker
authors: Department of Obstetrics and Gynecology, Division of Urogynecology and Pelvic Reconstructive Surgery, The Ottawa Hospital, Ottawa ON.
authors: Dante
authors: D
authors: Pascali
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008875:Middle Aged; D011446:Prospective Studies; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging*; D014546:Urinary Catheterization; D014554:Urination