IN THE PRESENCE OF ELEVATED CALCIUM, THE BODY ATTEMPTS TO EXCRETE THE EXCESS CALCIUM LEADING TO HYPERCALCIURIA. IDIOPATHIC HYPERCALCIURIA CAN OCCUR IN THE ABSENCE OF HYPERCALCEMIA.
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10 ML (5 ML MIN.) ALIQUOT OF 24 HOUR URINE. COLLECT URINE WITH 25 ML 50% CONCENTRATED HCL TO MAINTAIN PH BELOW 3. RECORD 24-HOUR URINE VOLUME & PATIENT BODY WEIGHT ON TEST REQUEST FORM AND URINE VIAL. SHIP REFRIGERATED OR FROZEN.