In case of vesicoureteric reflux which will be inv. of choice:
**Question:** In case of vesicoureteric reflux which will be the invasive procedure of choice:
A. Urodynamic study
B. Voiding cystourethrogram (VCUG)
C. Intravenous pyelography (IVP)
D. Renal biopsy
**Correct Answer:** B. Voiding cystourethrogram (VCUG)
**Core Concept:**
Vesicoureteric reflux (VUR) is a condition where urine flows backwards from the bladder into the ureter and potentially the kidney, leading to potential damage and infections. Diagnosis and management of VUR involve invasive procedures to assess the grade and severity of reflux and to identify associated complications like pyelonephritis.
**Why the Correct Answer is Right:**
VCUG is the most common and reliable diagnostic test for VUR due to its ability to visualize the lower urinary tract, including the ureter, during the voiding phase. VCUG involves injecting a radiopaque dye into the bladder via the urethra during a voiding cystourethrogram and observing the flow of the dye into the ureter and kidney.
**Why Each Wrong Option is Incorrect:**
A. Urodynamic study (UDG): UDG evaluates the bladder function and pressure dynamics but does not specifically diagnose VUR or assess the ureteral and renal involvement, making it a less suitable option.
C. Intravenous pyelography (IVP): IVP is an imaging study that primarily evaluates the kidneys, ureters, and the collecting system but does not directly visualize the ureter and bladder during the voiding phase, making it an unsuitable option for VUR diagnosis.
D. Renal biopsy: A renal biopsy is an invasive procedure used to examine the renal tissue under a microscope to diagnose kidney damage. This option is unrelated to the diagnosis and management of VUR and is too invasive for this purpose.
**Clinical Pearl:**
In cases of suspected VUR, clinical evaluation should be combined with VCUG to comprehensively assess the lower urinary tract and identify the severity and side of the reflux. This helps in deciding the appropriate management strategy, including prophylactic antibiotics, surgery, or close monitoring, depending on the reflux grade and associated complications.