voiding cystourethrogram
Also written as: VCUG — Voiding Cystourethrogram
Fluoroscopic X-ray study using contrast to evaluate bladder filling, emptying, and detect vesicoureteral reflux in children.
Full Definition
A voiding cystourethrogram (VCUG) is a specialized radiological examination that involves catheterization of the bladder, instillation of iodinated contrast material, and fluoroscopic imaging during both bladder filling and voiding phases. This study is the gold standard for diagnosing and grading vesicoureteral reflux, evaluating bladder anatomy, and assessing urethral abnormalities such as posterior urethral valves. In pediatric patients, the study requires careful preparation including prophylactic antibiotics and age-appropriate sedation or distraction techniques. The radiation exposure and invasive nature of the procedure necessitate clear clinical indications, and alternative studies like nuclear cystography or ultrasound may be considered in specific circumstances.
Usage
Usage note: Commonly abbreviated as VCUG; ensure distinction from other cystographic studies.
In Context
- "The voiding cystourethrogram demonstrated grade III vesicoureteral reflux on the left side." — Radiology report
- "A follow-up voiding cystourethrogram was scheduled to assess resolution of reflux after medical management." — Pediatric urology clinic note