- Stones
- Congenital structural defects
- Fibrosis
- Treatment with radiation in pelvis
Complication of Obstruction
- If untreated, permanent damage can occur within 48 hours
- Renal failure
- Retention of
- Nitrogenous wastes (urea, creatinine, uric acid)
- Electrolytes (K, Na, Cl, and Phosphorus)
- Acid base balance impaired
- Retention of
Renal Calculi
- Called nephrolithiasis or urolithiasis
- Most commonly develop in the renal pelvis but can be anywhere in the urinary tract
- Vary in size –from very large to tiny
- Can be 1 stone or many stones