DRG Category: 691

Mean LOS: 4.1 days

Description MEDICAL: Urinary Stones with ESW Lithotripsy with CC or Major CC

classification section:



Renal calculi, or nephrolithiasis, are stones that form in the kidneys from the crystallization of minerals and other substances that normally dissolve in the urine. Renal calculi vary in size, with 90% of them smaller than 5 mm in diameter; some, however, grow large enough to prevent the natural passage of urine through the ureter. Calculi may be solitary or multiple. Approximately 80% of these stones are composed of calcium salts. Other types are the struvite stones (which contain magnesium, ammonium, and phosphate), uric acid stones, and cystine stones. If the calculi remain in the renal pelvis or enter the ureter, they can damage renal parenchyma (functional tissue). Larger calculi can cause pressure necrosis. In certain locations, calculi cause obstruction, lead to hydronephrosis, and tend to recur.