Oxalate/Creat Ratio, Random U

Test ID: 

703067

CPT code:

83945, 82570

Synonyms:

Oxalate:Creatinine Ratio, Random Urine

Specimen Type:

Urine (random)

Requested Volume: 

10 mL

Minimum Volume: 

2.5 mL

Container Type: 

Use random urine transport tube or urine Monovette® with pH stabilizer.Monovette® instructions accompany units.

Patient Preparation: 

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

Collection:

Collect urine and transfer to a random urine transport tube or urine Monovette® with pH stabilizer

Storage Instructions:

Maintain acidified urine at room temperature. Acid prevents crystallization and conversion of ascorbate (vitamin C) to oxalate.

Stability Requirements:

Temperature

Period

Room temperature

7 days

Refrigerated

7 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

Rejection Criteria

Urine sample received with a pH not ≤3 from a patient on high doses of vitamin C

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