title: Estimation of bladder volume using portable ultrasound in clam enterocystoplasty patients.
abstract: OBJECTIVE
  We evaluated portable ultrasound for the measurement of residual volume following clam enterocystoplasty.
  
  
  METHODS
  Bladder volumes were measured in 25 clam enterocystoplasty patients using a portable ultrasound machine and compared with urethral catheter volumes. A similar study was performed on a control group of 50 patients with normal bladder architecture.
  
  
  RESULTS
  There was a close correlation (r = 0.978) between ultrasound and catheter volumes in the control group with a regression line slope of 0.88. There was an equally close correlation (r = 0.960) in the clam enterocystoplasty group but the regression line slope was lower at 0.65, which suggests an underestimation of the true bladder volume. There was a significant difference (p < 0.0001) between the ultrasound-to-catheter volume ratio in the 2 groups.
  
  
  CONCLUSIONS
  Portable ultrasound is inaccurate for the measurement of residual bladder volume in clam enterocystoplasty patients.
mesh_terms: D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007422:Intestines / Q000601:surgery*; D008297:Male; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery*; D014546:Urinary Catheterization; D014563:Urodynamics / Q000502:physiology