Simple test to evaluate the risk of urinary calcium stone formation.
A simple test to evaluate the capacity of a urine to crystallize calcium salts is presented. The test is based on the fact that if a non-protected non-renewed surface remains in contact with a urine, sooner or later the contained supersaturated substances crystallize on it. Thus, by using an adequate surface, it is possible to derive a period within which a normal urine does not crystallize whereas a lithogenic urine induces the growth of calcium salts. The test was applied to urines of oxalocalcic stone-formers and healthy people and showed an excellent discrimination between clearly abnormal and healthy urines. Semiologic analysis of the data is also included.
Grases
F
F
Faculty of Science, University of Balearic Islands, Hospital Son Dureta, Palma de Mallorca, Spain.
García-Ferragut
L
L
Costa-Bauzá
A
A
Conte
A
A
García-Raja
A
A
D000328:Adult; D000368:Aged; D002129:Calcium Oxalate / Q000652:urine; D016022:Case-Control Studies; D003460:Crystallization; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D012680:Sensitivity and Specificity; D014545:Urinary Calculi / Q000175:diagnosis / Q000209:etiology* / Q000652:urine*; D014556:Urine / Q000737:chemistry
D002129:Calcium Oxalate