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Calcium-loading test and bone disease in patients with urolithiasis
Proceedings of the European Dialysis and Transplant Association. European Dialysis and Transplant Association
|January 1, 1983
Summary
Patients with renal hypercalciuria have lower bone mineral content (BMC). Elevated 24-hour urine calcium excretion was observed in absorptive and renal hypercalciuria, but not correlated with BMC.
Area of Science:
- Nephrology
- Endocrinology
- Urology
Background:
- Calcium urolithiasis is a common condition.
- Hypercalciuria, characterized by elevated urinary calcium, is a major risk factor for calcium nephrolithiasis.
- Understanding the subtypes of hypercalciuria is crucial for effective management.
Purpose of the Study:
- To investigate the relationship between different types of hypercalciuria and bone mineral content (BMC).
- To explore potential biomarkers for differentiating hypercalciuria subtypes.
- To guide treatment strategies for patients with calcium urolithiasis.
Main Methods:
- 121 patients with a history of calcium urolithiasis were classified into normal, absorptive, and renal/resorptive calciuria groups using a calcium-loading test.
- Bone mineral content (BMC) was measured.
- 24-hour urine calcium excretion was analyzed.
- Cyclic adenosine monophosphate (c-AMP) to creatinine ratio was assessed.
Main Results:
- Patients with renal hypercalciuria exhibited lower BMC compared to other groups.
- Elevated 24-hour urine calcium excretion was found in absorptive and renal hypercalciuria, but not in the normal group.
- No correlation was observed between urinary calcium excretion and BMC.
- The c-AMP/creatinine ratio showed potential in distinguishing resorptive from renal calciuria.
Conclusions:
- Renal hypercalciuria is associated with reduced bone mineral content.
- Thiazide therapy, a calcium-retaining drug, may be most beneficial for patients with renal hypercalciuria.
- Further research is warranted to validate the use of c-AMP/creatinine ratio in clinical practice.