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Acute acid load in recurrent oxalate stone formers
H H Knispel1, R Fitzner, M Kaiser
1Urologische Abteilung, St.-Josefskrankenhaus, Paderborn, BRD.
Urologia Internationalis
|January 1, 1988
Summary
An acute acid load test reveals distinct urinary chemical differences in recurrent oxalate stone formers. This test can help differentiate stone formers from healthy individuals based on urinary calcium, citrate, oxalate, and uric acid levels.
Area of Science:
- Nephrology
- Urology
- Biochemistry
Background:
- Recurrent calcium oxalate stones are a significant health concern.
- Urinary composition plays a critical role in stone formation.
- Understanding metabolic differences in stone formers is crucial for prevention.
Purpose of the Study:
- To investigate urinary chemical differences between recurrent oxalate stone formers and healthy controls.
- To evaluate the impact of an acute acid load on urinary composition.
- To determine if an acid load test can discriminate between stone formers and controls.
Main Methods:
- Administered an acute acid load (ammonium chloride) to participants.
- Collected and analyzed urine samples for total calcium, ionized calcium, magnesium, citrate, oxalate, and uric acid.
- Compared urinary excretion patterns between recurrent oxalate stone formers and healthy controls.
Main Results:
- Both groups showed increased total calcium, ionized calcium, and magnesium, with decreased citrate after acid load.
- Significant differences in urinary excretion of total calcium, citrate, oxalate, and uric acid were observed between stone formers and controls post-acid load.
- Ionized calcium levels did not effectively differentiate between the two groups.
Conclusions:
- Acute acid loading can alter urinary composition in a manner that helps distinguish recurrent oxalate stone formers.
- Dietary factors contributing to high acid load may promote stone formation.
- An acute acid-loading test shows potential as a diagnostic tool for identifying recurrent oxalate stone formers.