Indication for voiding cystourethrography during first urinary tract infection.

Area of Science:

• Pediatric Nephrology
• Urology
• Diagnostic Imaging

Background:

• Uncertainty exists regarding the precise indications for voiding cystourethrography (VCUG) in assessing vesicoureteral reflux (VUR) after a first febrile urinary tract infection (UTI).
• Identifying high-grade VUR (grades IV-V) is crucial for appropriate management in young children.

Purpose of the Study:

• To identify clinical, laboratory, and ultrasonography factors that correlate with high-grade VUR in children aged 0-24 months following their first febrile UTI.
• To refine the indications for VCUG in this patient population.

Main Methods:

• A retrospective study of 231 children (0-24 months) diagnosed with their first febrile UTI.
• Comparison of clinical, laboratory, and ultrasonography findings between children with high-grade VUR and those with normal or low-grade VUR.

Main Results:

• Poor clinical appearance, non-Escherichia coli uropathogen, positive blood culture, hydroureter, and thickened renal pelvic wall were independently associated with high-grade VUR.
• The presence of one or more of these factors significantly increased the likelihood of high-grade VUR.
• When none of these factors were present, the incidence of high-grade VUR was only 0.7%.

Conclusions:

• VCUG is not routinely necessary for detecting high-grade VUR in young children after their first febrile UTI if specific risk factors are absent.
• The presence of multiple risk factors (e.g., >1 of the identified factors) strongly indicates the need for VCUG to rule out high-grade VUR.