Should Idiopathic Calcium-Phosphate Stones be Separated from Calcium-Oxalate Stones?
In many studies, idiopathic calcium-phosphate and calcium-oxalate stones are grouped together as calcium stones, yet calcium-phosphate stones may be the second commonest type submitted for analysis in some areas. In 12 reports from five countries, calcium-phosphate stones averaged 9% of 40,000 stones and in Newfoundland, 12% of 4014 stones analyzed (1). Based on prevalence studies (2), we estimate that our Renal Laboratory receives for analysis from the Newfoundland population 15–20% of stones passed spontaneously or removed.
KeywordsTitratable Acid Ammonium Chloride Renal Tubular Acidosis Calcium Stone Stone Composition
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- 4.WG Robertson, Urinary tract calculi, in: “Metabolic Bone and Stone Disease,” BEC Nordin, ed., Churchill Livingstone, New York (1984).Google Scholar