Magnesium, random urine

Alphabetical Test listing

Test name:

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Useful for:

Assessing the cause of abnormal serum magnesium concentrations
Determining whether nutritional magnesium loads are adequate
Calculating urinary calcium oxalate and calcium phosphate supersaturation and assessing kidney stone risk

Specimen type:

Urine, random

Collection container:

Volume:

4 mL

Minimum volume:

1.0 mL

Collection instructions:

Collect a random urine specimen, no preservatives

Processing instructions:

Transfer 4mL (minimum 1.0mL) of urine to a Screw cap transfer vial/tube (Mayo T914)

Transport container:

Transport and stability:

Refrigerated (preferred) – 14 days

Ambient – 72 hours

Frozen – 14 days

Specimen retention time:

7 days

Performing lab:

Mayo Clinic Laboratories (MAGNR): R-NX

Days set up:

Daily

TAT:

2 - 3 days

Method:

Colorimetric endpoint assay

Reference ranges:

Random Magnesium/Creatinine Ratio: ≥0.035 mg/mg

Reference values have not been established for patients <18 years or >83 years of age

CPT codes:

83735

Date created:

02/22/2021