title: Simple test to evaluate the risk of urinary calcium stone formation.
abstract: 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.
authors.affiliation: Faculty of Science, University of Balearic Islands, Hospital Son Dureta, Palma de Mallorca, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Grases
authors.forename: L
authors.initials: L
authors.lastname: García-Ferragut
authors.forename: A
authors.initials: A
authors.lastname: Costa-Bauzá
authors.forename: A
authors.initials: A
authors.lastname: Conte
authors.forename: A
authors.initials: A
authors.lastname: García-Raja
mesh_terms: 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
chemical_list: D002129:Calcium Oxalate