Vesicoureteral Reflux (VUR)

Know which procedure you are covering - Sedation for a voiding cystourethrogram (VCU is the gold-standard diagnostic and sets the grade; midazolam is the commonly used sedative for the anxious child), cystoscopy with subureteric bulking-agent injection, open ureteral reimplantation (still the gold-standard repair), or robot-assisted laparoscopic reimplantation. The renal physiology is the same across all of them; the airway, position, and duration are not.

Renal function is the whole point - Get a creatinine and an age-appropriate blood pressure, then read the imaging that already exists: renal ultrasound as the primary test for cortical abnormality, DMSA nuclear renal scan as the more reliable test for scarring, and the VCU or radionuclide cystogram for grade and laterality. High-grade, bilateral, scarred kidneys change drug dosing and blood-pressure targets.

Hypertension from scarring - Untreated reflux ends in renal hypertension and chronic kidney disease. Check the pressure against age-specific norms rather than eyeballing it, and expect a labile intraoperative pressure in a child who is already hypertensive.

Active UTI moves the case - Acute UTI is a relative contraindication to the VCU itself, and salvaging kidneys is the entire reason VUR gets treated. An elective cystoscopy or reimplant on a febrile child with active infection is a conversation with the urologist before you take them back.

They are usually on antibiotics - Continuous antibiotic prophylaxis with nitrofurantoin, a cephalosporin, or trimethoprim/sulfamethoxazole is standard for high-grade reflux. Know what they are on and when the last dose was; it also means resistant organisms when they do get infected.

Endocarditis prophylaxis before instrumentation - Children with a prosthetic valve or a septal defect need antibiotic prophylaxis before the VCU or cystoscopy. Ask about congenital heart disease early — it also changes your monitoring and your air-bubble discipline on the IV line.

Caudal for the reimplant - A caudal block covers surgery up to the umbilicus, which fits a lower-abdominal ureteral reimplantation, and it cuts intraoperative opioid and smooths emergence.

Bladder spasm after reimplantation - Ureteral stents and a bladder catheter make the first day about spasm as much as incisional pain. A caudal covers the incision but not the spasm, so settle the antispasmodic plan with the urologist before the child wakes up.

Look upstream for secondary reflux - Reflux that follows bladder outlet obstruction or a neurogenic bladder is a different patient. Children with posterior urethral valves carry a high rate of chronic kidney disease and abnormal bladder function requiring clean intermittent catheterization, and neonates with valves may need hyperkalemia corrected before anything elective happens.

Vesicoureteral reflux (VUR) is retrograde flow of urine from the bladder back into the upper urinary tract, and it is often genetic. Normally the distal ureter runs an oblique intramural tunnel through the bladder wall with a tunnel-length to ureteral-diameter ratio of about 5:1, and rising bladder pressure closes that orifice. A shortened tunnel, an ectopic ureteric opening, or bladder dysfunction defeats the valve. Thirty to forty percent of infants presenting with a UTI have VUR.

The damage is renal scarring by two routes: infected urine refluxing into the kidney sets off inflammation and cortical fibrosis — more so in grades III to V, and about 50% of acute pyelonephritis patients scar — and sterile high-pressure reflux destroys tubules with parenchymal atrophy. Untreated, this ends in renal hypertension and chronic kidney disease.