Reliability of bladder volume measurement with BladderScan® in paediatric patients

Mario De Gennaro, Maria Luisa Capitanucci, Vincenzo Di Ciommo, Ottavio Adorisio, Giovanni Mosiello, Cinzia Orazi, Andrea Tubaro

Research output: Contribution to journalArticlepeer-review


Objective. To evaluate the reliability of estimates of bladder volume (BV) in children made with the BladderScan® BVI 2500 (BS) and their agreement with standard ultrasound (US) measurements. Material and methods. BV was measured using both US and BS in 92 children (41 females, 51 males; age range 3 months to 16 years) who underwent standard US measurements for various reasons. Patients were stratified into three groups according to age (3-35, 36-83 and >83 months) and BV (50% of expected bladder capacity for age). US and BS measurements were compared by means of the percentage difference and Pearson's correlation coefficient (r); limits of clinical agreement were evaluated by means of Bland-Altman analysis. Results. Overall, a difference of -12.9% and a correlation coefficient of r=0.98 were found between US and BS. The percentage difference was higher in younger patients (-27.8%) and for low volumes (-24.8%). Correlation analysis confirmed this trend in different age (3-35 months, r=0.74; 36-83 months, r=0.93; >83 months, r=0.97) and BV (50%, r=0.97) groups. Bland-Altman analysis showed large limits of clinical agreement between the two methods in terms of overall measurements (-45 to 29.3 ml) and in both age (-25.3 to 56.9 ml) and BV (-27.5 to 52.5 ml) groups. Conclusions. A good correlation between US and BS measurements of BV was found in children aged >7 years and in those with a BV >20% of expected bladder capacity. Thus, BS avoids the need for standard US equipment to assess BV for schoolchildren with voiding dysfunction. Nevertheless, a dedicated BS instrument should be used in younger children.

Original languageEnglish
Pages (from-to)370-375
Number of pages6
JournalScandinavian Journal of Urology and Nephrology
Issue number5
Publication statusPublished - Nov 1 2006


  • Bladder volume
  • BladderScan
  • Voiding dysfunction

ASJC Scopus subject areas

  • Nephrology
  • Urology


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