Targeted Indication of Imaging for Detection of Vesicoureteric Reflux after Pediatric Febrile Urinary Tract...

Area of Science:

• Pediatric Nephrology
• Diagnostic Imaging
• Urology

Background:

• Diagnostic workup for febrile urinary tract infections (fUTIs) in children lacks standardized guidelines.
• Voiding cystourethrography (VCUG) is a key diagnostic tool but is invasive and exposes children to radiation.
• Identifying children who would benefit most from VCUG is crucial for optimizing diagnostic strategies.

Purpose of the Study:

• To develop and validate a predictive tool for targeted indication of VCUG after fUTIs in children.
• To identify key parameters that predict the likelihood of vesicoureteric reflux (VUR).
• To improve the specificity and efficiency of the diagnostic algorithm for fUTIs.

Main Methods:

• Retrospective review of 383 children undergoing VCUG and dimercaptosuccinic-acid (DMSA) scans post-fUTI.
• Analysis of 20 parameters to identify significant predictors of VUR.
• Development of a computational tool incorporating 6 significant parameters.
• Prospective validation of the tool on 100 new patients.

Main Results:

• Significant predictors for VUR included postpyelonephritic DMSA changes, duplex systems, age 1-3 years, fever duration >3 days, multiple prior fUTIs, and abnormal sonography.
• Bladder and bowel dysfunction (BBD) was negatively associated with VUR.
• The predictive tool achieved an Area Under the Curve (AUC) of 0.686.
• Prospective evaluation showed 85.1% sensitivity and 49.1% specificity for VUR detection.

Conclusions:

• A tool-based, differentiated indication for VCUG is effective in optimizing diagnostic specificity after fUTIs.
• This strategy demonstrated superior performance in VUR detection and reducing VCUG frequency compared to other clinical approaches.
• Further multicentric validation and refinement could significantly enhance VUR detection while minimizing unnecessary VCUGs.