Voiding cystourethrograms and urinary tract infections: how long to wait?

Area of Science:

• Pediatric Nephrology
• Urology
• Diagnostic Imaging

Background:

• Current guidelines recommend a 3-6 week interval between urinary tract infection (UTI) diagnosis and voiding cystourethrogram (VCUG).
• This delay may decrease the likelihood of completing the VCUG procedure.
• The impact of this interval on reflux detection and procedure completion is not well-established.

Purpose of the Study:

• To evaluate if the timing of VCUG after UTI diagnosis affects reflux presence or severity.
• To determine if the interval influences the completion rate of scheduled VCUGs.
• To inform recommendations regarding optimal VCUG timing post-UTI.

Main Methods:

• Retrospective review of 352 pediatric admissions with UTI discharge diagnoses over 27 months.
• 213 patients with confirmed UTI and no prior urinary tract pathology were analyzed.
• Patients were grouped into early (VCUG within 1 week) and late (VCUG after 1 week) post-UTI diagnosis.

Main Results:

• No statistically significant difference in reflux presence between early (19%) and late (18%) groups.
• VCUG completion rate was 100% in the early group versus 48% in the late group (statistically significant).
• Delayed VCUG scheduling led to a failure rate of over 50% for the procedure.

Conclusions:

• Performing VCUG within one week of UTI diagnosis in hospitalized children does not alter reflux detection rates.
• Delayed VCUG scheduling significantly reduces procedure completion, potentially leaving children with undiagnosed vesicoureteral reflux.
• The traditional 3-6 week waiting period for VCUG after UTI should be reconsidered, particularly for hospitalized pediatric patients.