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Health Topics

Vesicoureteral Reflux (VUR)

To understand vesicoureteral (ves-ih-ko-yu-ree-ter-ul) reflux, one needs to understand the normal structure and function of the urinary tract.

The urinary system

The kidneys clean and filter blood to produce urine. Urine is liquid waste. Urine travels from the kidneys down the ureters and into the bladder. The bladder holds the urine and acts as a storage tank. As the bladder fills, the wall of the bladder relaxes to hold more urine. The control muscle (sphincter) remains tight to prevent leakage of urine. Once in the bladder, the urine is stopped from going back into the ureters by a valve mechanism. When the bladder gets full, it sends a message to the brain. The brain decides when urination should start. The bladder contracts while the sphincter muscle relaxes allowing the bladder to squeeze all of the urine out.

Vesicoureteral Reflux is a disorder of the Kidney and Genitourinary Systems.

Reflux

What is VUR? Vesicoureteral reflux is a condition in which urine from the bladder is able to flow back up into the ureter and kidney. It is caused by a problem with the valve mechanism. Pressure from the urine filling the bladder should close the tunnel of the ureter. It should not allow urine to flow back up into the ureter. When the ureter enters the bladder at an unusual angle or when the length of the ureter that tunnels through the bladder wall is too short, reflux can occur.

Vesicoureteral reflux becomes a problem when the urine in the bladder becomes infected. The infected urine easily travels backwards to the kidney and can cause a kidney infection. Kidney infections lead to kidney damage.

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Diagnosis of Vesicoureteral Reflux (VUR)

Treatment for Vesicoureteral Reflux (VUR)

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Last Updated: 12/2009