Bladder scan accuracy in pediatric patients: Does patient position matter?

Area of Science:

• Pediatric Urology
• Medical Imaging Technology

Background:

• Portable bladder scanning is widely used in pediatric urology but lacks standardized protocols.
• Current supine scanning methods can impede clinic workflow due to patient repositioning.

Purpose of the Study:

• To evaluate the accuracy of portable bladder scanning in standing versus supine positions in children.
• To test the hypothesis that standing bladder scanning is as accurate as supine scanning for pediatric patients.

Main Methods:

• Prospective recruitment of sixty children from a bladder/bowel clinic.
• Comparison of bladder scan estimates (standing and supine) against formal supine renal/bladder ultrasound.
• Statistical analysis using repeated measures one-way ANOVA.

Main Results:

• Pre-void standing bladder scans showed the strongest correlation with ultrasound volume (r=0.83).
• Standing scans were as accurate as ultrasound for pre-void volumes, while supine scans underestimated.
• Both standing and supine scans showed inaccuracies, particularly underestimating volumes in younger children (<10 years).

Conclusions:

• Standing bladder scanning may serve as a viable alternative to supine scanning in pediatric urology.
• Portable bladder scanning accuracy is limited, especially in younger children, necessitating cautious application.
• The specificity of detecting elevated post-void residuals may be reduced compared to ultrasound.