Oxalate:Creatinine Ratio, Random Urine

Alphabetical Test listing

Oxalate:Creatinine Ratio, Random Urine-994

Test name:

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Patient preparation information:

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.

Specimen type:

Urine (random)

Collection container:

Screw cap plastic container (non sterile)

Volume:

10 mL

Minimum volume:

2.5 mL

Processing instructions:

Transfer sample to a Urine Monovette with pH stabilizer

Transport container:

Urine Monovette with pH stabilizer

Transport and stability:

Specimen preserved in Urine Monovette with pH stabilizer

Ambient (preferred) - 7 days

Refrigerated - 7 days

Frozen - 8 weeks

Freeze/thaw cycles - Stable x3

Reason for rejection:

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

Performing lab:

LabCorp (123500)

Days set up:

Mo - Fr

TAT:

7 days

Method:

Enzymatic (Oxalate); Kinetic (Creatinine)

Reference ranges:

Oxalate: mg/L

Creatinine: mg/dL

Ratio: mg/g

CPT codes:

82570
83945

Date created:

09/21/2022

Revised date:

05/14/2024

Review date:

05/14/2024