| خلاصه مقاله | Introduction and Background: Voiding cystourethrography (VCUG) is the most commonly
performed fluoroscopic examination for children. Besides; it is a very stressful urological
assessment performed on children. Therefore, pediatricians are expected to follow restrict
indications when decide to prescribe VCUG for a child and exactly consider its
contraindications too.
Discussion: The prerequisites that a pediatrician must necessarily consider before prescribing
the VCUG for a child are as followings: absence of active urinary tract infection (UTI),
correction of Labial adhesion before examination, and administration of an appropriate
prophylactic antibiotic. VCUG is commonly indicated in following situations:
1- After urinary tract infection (UTI)
2- Perinatally diagnosed hydronephrosis - hydroureter
3- Congenital anomalies of kidney(s) and/or urinary tract such as posterior urethral
valve (PUV),
4- Genitourinary trauma,
5- Urolithiasis
6- Dysuria /difficulty voiding / bladder outlet obstruction
7- Assessment of unstable bladder;
8- R/o vesico-ureteral reflux (VUR).
9- Postoperative urinary tract evaluation
10- Dysfunctional voiding / Neurogenic bladder / Incontinence
11- Hematuria
In evaluation of a child with UTI; VCUG is not recommended routinely after the first febrile
UTI, unless it is either atypical/complicated or accompanied by ultrasonographic findings.
Atypical UTI includes: decreased urine flow, critically ill patient, high creatinine level,
septicemia, abdominal or bladder mass, no response to treatment within 48 hours and non Ecoli infections. VCUG is indicated even in the first UTI if kidney and urinary tract
ultrasonography reveals hydronephrosis, scarring, or other findings that could suggest VUR
or obstruction. VCUG is always indicated in recurrent UTI defined as: two or more episodes
of febrile upper UTI (or acute pyelonephritis); or one episode of acute pyelonephritis and an
episode of lower UTI (or cystitis); or three or more episodes of lower UTI.
Conclusion: Decision making for prescription of VCUG in a pediatric patient must be
always based on assessment of its cost-benefit ratio. |