Test ID: ZG079
Component(s): Z0235 Oxalates, Urine LOINC: 2700-3, Z0231 Oxalates, Urine 24hr LOINC: 2701-1, Z0233 Urine Volume
CPT code: 83945
LOINC:
Specimen Type: Plastic 24hr urine container with 30 mL 6N HCl preservative
Frequency: 4 – 5 days
Instructions: 10mL Urine from Plastic 24hr urine container with 30mL 6N HCl preservative, Ambient, pH less than or equal to 3 with 6N HCl. Min 2.5mL aliquot.
Text: Patients who form calcium oxalate kidney stones appear to absorb and excrete a higher portion of dietary oxalate in urine than do normals. Hyperoxaluria is not uncommon in subjects with malabsorption. Twenty-four hour urine collections for oxalate are indicated in patients with surgical loss of distal small intestine, especially those with Crohn’s disease.
Methodology: Enzymatic