title: Evaluation of the BladderScan(®) in estimating bladder volume in paediatric patients.
abstract: OBJECTIVE
  To evaluate the reliability of estimates of bladder volume (BV) in children with the BladderScan BVI 9400 (BS) compared with the volume obtained at catheterization (CV).
  
  
  METHODS
  BV was measured using the BS in 50 children (age range 6 weeks-14 years) who required urinary catheter placement during surgery or urodynamic studies. BS measurements were taken prior to catheter insertion. BV was compared with CV.
  
  
  RESULTS
  BS volumes ranged from 0 to 513 mL (mean = 79 mL, median = 34 mL) and CV from 0 to 500 mL (mean = 81 mL, median = 31 mL). There was high correlation between the BS and CV measures (rho = 0.96). The mean difference between BS and CV volumes was -2.1 mL (SD 21). Where the CV ≤ 100 mL the BS volumes ranged from 0 to 84 mL (mean = 74 mL, median = 30 mL) and the CV from 0 to 88 mL (mean = 76 mL, median = 25 mL) (rho = 0.89). The mean difference = 0.5 mL (95% limits of agreement ± 23 mL). In a small sample of 12 children <36 months, correlation between BS and CV volumes was not as strong with rho = 0.82.
  
  
  CONCLUSIONS
  Overall the BladderScan showed a high correlation with catheter volume and there was good clinical agreement between the measures.
authors.affiliation: Department of Paediatric Surgery and Urology, Starship Children's Health, Auckland District Health Board, Private Bag 92024, Auckland Mail Centre, Auckland 1142, New Zealand. Electronic address: joanner@adhb.govt.nz.
authors.forename: Joanne
authors.initials: J
authors.lastname: Rowe
authors.affiliation: Department of Paediatric Surgery and Urology, Starship Children's Health, Auckland District Health Board, Private Bag 92024, Auckland Mail Centre, Auckland 1142, New Zealand. Electronic address: NPrice@adhb.govt.nz.
authors.forename: Neil
authors.initials: N
authors.lastname: Price
authors.affiliation: Department of Paediatric Surgery and Urology, Starship Children's Health, Auckland District Health Board, Private Bag 92024, Auckland Mail Centre, Auckland 1142, New Zealand. Electronic address: VipulU@adhb.govt.nz.
authors.forename: Vipul
authors.initials: V
authors.lastname: Upadhyay
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009929:Organ Size; D015203:Reproducibility of Results; D014463:Ultrasonography; D001743:Urinary Bladder / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D014546:Urinary Catheterization
keywords: Bladder volume; BladderScan; Catheter; Children