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Changes in the composition of urinary tract stones
Investigative Urology
|September 1, 1975
Summary
Over a 9-year period, kidney stones showed increased calcium oxalate and decreased calcium phosphate. This shift is linked to better diagnosis and treatment of non-infected urinary tract stones.
Area of Science:
- Urology
- Nephrology
- Biochemistry
Background:
- Urinary tract stone composition analysis over time reveals significant shifts.
- Calcium oxalate and calcium phosphate are primary stone constituents.
Purpose of the Study:
- To analyze trends in kidney stone composition over a nine-year period.
- To investigate the factors contributing to observed changes in stone composition.
Main Methods:
- Analysis of kidney stones received over a 9-year study period.
- Correlation of stone composition changes with patient diagnosis and treatment data.
Main Results:
- A notable increase in average calcium oxalate content in stones.
- A significant decrease in average calcium phosphate content in stones.
- Observed changes attributed to improved diagnosis/treatment of non-infected upper urinary tract stones and elimination of phosphatic stones.
Conclusions:
- Calcium oxalate is increasingly dominant in idiopathic stone disease.
- Understanding factors influencing calcium oxalate crystallization is crucial.
- Conditions like primary hyperparathyroidism, renal tubular acidosis, and medullary sponge kidney are associated with calcium phosphate stones.