title: A modified Pak test to diagnose hypercalciuria in outpatients.
abstract: A modification of the so-called Pak test to classify hypercalciuria in outpatients was evaluated. With the original Pak test, 25-31% of our patients with proven hypercalciuria and stone disease could not be classified mainly because of the low-calcium diet used in preparation for the test. By using sodium cellulose phosphate 4 days before the Pak test instead of a low-calcium diet we reduced the incidence of unclear results from 31 to 3% in the same patients.
mesh_terms: D000553:Ambulatory Care; D002118:Calcium / Q000652:urine*; D002136:Calcium, Dietary / Q000008:administration & dosage; D002482:Cellulose / Q000031:analogs & derivatives; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods
chemical_list: D002136:Calcium, Dietary; D002482:Cellulose; C008881:phosphocellulose; D002118:Calcium