|Test Code||OXA24 / 003970L|
|Test||OXALATE, 24-HOUR URINE|
|Description||Useful to work up nephrolithiasis|
|Specimen||10 mL (minimum volume: 2.5 mL) aliquot from a 24-hour urine collection. Add 30 mL 6N HCI at the end of collection within 4 hours of completion of collection. Final pH must be between 1 and 3. For multiple collections, see "Urine Preservatives". Mix well before aliquot is taken. Send refrigerated. Note 24-hour volume on the requisition form. For additional collection instructions, see "Urine Collection".
NOTE: Patient must avoid vitamin C supplements and vitamin C rich foods (eg, citrus fruits like oranges, orange juice; vegetables like broccoli, tomatoes, peppers, potatoes) for 48 hours prior to collection.
< 7 years: Not established
7 - 14 years: 13 - 38 mg/24 hours
|Analytic Time||2 Days|
|Day(s) Test Set Up||Monday through Friday|