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Reliability of bladder volume measurement with BladderScan in paediatric patients

Mario De Gennaro1, Maria Luisa Capitanucci, Vincenzo Di Ciommo

  • 1Department of Nephrology and Urology, Urodynamic Unit, Ospedale Pediatrico Bambino Gesu, Piazza Sant'Onofrio, Rome, Italy.

Scandinavian Journal of Urology and Nephrology
|October 25, 2006
PubMed

Insights

BladderScan BVI 2500 (BS) provides reliable bladder volume (BV) estimates in children over 7 years old, correlating well with ultrasound (US) measurements. For younger children, a dedicated BS instrument is recommended.

Area of Science:

  • Pediatric Urology
  • Medical Imaging Technology
  • Diagnostic Accuracy

Background:

  • Accurate bladder volume (BV) assessment is crucial in pediatric urology.
  • Standard ultrasound (US) is the conventional method for BV measurement.
  • The BladderScan BVI 2500 (BS) offers a non-invasive alternative for BV estimation.

Purpose of the Study:

  • To assess the reliability and agreement of bladder volume (BV) measurements obtained with the BladderScan BVI 2500 (BS) compared to standard ultrasound (US) in pediatric patients.
  • To determine the accuracy of BS in different age groups and varying bladder volumes.

Main Methods:

  • Bladder volume (BV) was measured in 92 children (age 3 months to 16 years) using both standard ultrasound (US) and BladderScan BVI 2500 (BS).
  • Patients were stratified by age (3-35, 36-83, >83 months) and BV (<20%, 20-50%, >50% of expected capacity).
  • Comparison involved percentage difference, Pearson's correlation coefficient (r), and Bland-Altman analysis for limits of agreement.

Main Results:

  • Overall, a strong correlation (r=0.98) was observed between US and BS, with a mean difference of -12.9%.
  • Accuracy decreased in younger children (<35 months, r=0.74) and with lower bladder volumes (<20%, r=0.70).
  • Bland-Altman analysis revealed wide limits of agreement (-45 to 29.3 ml overall).

Conclusions:

  • BladderScan BVI 2500 (BS) demonstrates good correlation with ultrasound (US) for bladder volume (BV) estimation in children over 7 years and with BV >20% of expected capacity.
  • BS can potentially replace standard US for BV assessment in school-aged children with voiding dysfunction.
  • A dedicated BS instrument is advised for younger children due to lower accuracy in this group.
Abstract

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