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Alternative Names Return to topUropathy - obstructive
Definition Return to top
Obstructive uropathy is a condition in which the flow of urine is blocked, causing it to back up and injure one or both kidneys.
Causes Return to top
Obstructive uropathy occurs when urine cannot drain through a ureter (a tube that carries urine from the kidneys to the bladder). Urine backs up into the kidney and causes it to become swollen (hydronephrosis).
Obstructive uropathy is grouped according to whether it affects one or both kidneys and whether it occurs suddenly or is long-term:
Common causes of obstructive uropathy include the following:
Symptoms Return to top
Symptoms associated with obstructive uropathy vary depending on whether the obstruction is acute or chronic, whether it is unilateral or bilateral, whether it is complete or partial, and what caused it. Common symptoms of obstructive uropathy include the following:
Exams and Tests Return to top
The diagnosis of obstructive uropathy is made on imaging studies. Common radiographic studies used to diagnose obstructive uropathy include:
Treatment Return to top
Stents or drains placed in the ureter or in the renal pelvis may provide short-term relief of symptoms. Nephrostomy tubes, which drain urine from the kidneys through the back, may be used to bypass the obstruction. A Foley catheter, inserted through the urethra, may also be helpful.
Although temporary relief from the obstruction can be achieved without surgery, the cause of the obstruction must be removed and the urinary system repaired. Long-term relief from obstructive uropathy requires surgery.
Outlook (Prognosis) Return to top
If an acute obstruction is rapidly diagnosed and repaired, kidney damage is minimal or reversible -- regardless of being unilateral or bilateral.
If chronic unilateral obstruction is not relieved promptly there could be permanent damage to the kidney. Chronic unilateral obstruction usually does not cause kidney insufficiency or failure because most patients have normal function from the other kidney.
Chronic bilateral obstruction may lead to kidney insufficiency or failure because both kidneys may become damaged and fail to function even after the obstruction is repaired.
For more specific information, see the individual articles below:
Possible Complications Return to top
Obstructive uropathy can cause permanent and severe damage to the kidneys, resulting in renal failure. Obstructive uropathy caused by bladder outlet obstruction can lead to permanent and severe damage to the bladder, resulting in problems such as incontinence and urinary retention.
When to Contact a Medical Professional Return to top
Contact your health care provider if you have symptoms of obstructive uropathy or believe that you may be suffering from this condition.
Prevention Return to top
Obstructive uropathy can be prevented by addressing any underlying disorders that can cause it.
References Return to top
Wein AJ, et al. Campbell-Walsh Urology. 9th ed. St. Louis, Mo: WB Saunders; 2007.
Goldman L, Ausiello D, et al. Cecil Textbook of Medicine, 22nd ed. Philadelphia, Pa: WB Saunders; 2004:741-742.Update Date: 1/24/2008 Updated by: Marc A. Greenstein, D.O., F.A.C.O.S. Urologist, Somerset Medical Center in Somerville, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.