2.9 days

MEDICAL: Urinary Stones with CC and/or ESW Lithotripsy 304

8.7 days

Kidney, Ureter, and Major Bladder Procedures; Nonneoplastic with CC

I I ydronephrosis is the distension of the pelvis and calyces of one or both kidneys, resulting in thinning of the renal tubules because of obstructed urinary flow. When the obstruction is a stone or kink in one of the ureters, only one kidney is damaged. The obstruction causes backup, resulting in increased pressure in the kidneys. If the pressure is low to moderate, the kidney may dilate with no obvious loss of function.

Hydronephrosis DRG CategoT

Mean LOS: Description:

DRG Category: Mean LOS: Description:

430 Hydronephrosis

Over time, intermittent or continuous high pressure causes irreversible nephron destruction. If the patient has a chronic partial obstruction, the kidneys lose their ability to concentrate urine. The kidneys may lose renal mass and atrophy and have a lowered resistance to infection and pyelonephritis because of urinary stasis. If hydronephrosis is caused by an acute obstructive uropathy (any disease of the urinary tract), the patient may develop a paralytic ileus. If bilateral hydronephrosis is left untreated, renal failure can result. At the time of death, approximately 3% of the U.S. population has hydronephrosis.

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