Test Name

Magnesium Urine
(random)

Test Code

2590

Unit

mg/dL

Station

Chemistry

Synonym Name/Abbreviation

Mg, urine

CPT Code

83735

Performing Facility

American Medical Labs, Herzliya
Pituah

Analyzer

Roche cobas 6000

Test Method

Spectrophotometry

AML Preferred Tube

Routine urinalysis leakproof tube or container, BD urine
transport tube, or sterile urine cup.

Storage Instructions

Refrigerated

Stability:

3 days at 15 to 25 ^oC

3 days at 2 to 8 ^oC

1 year at -25 to -15 ^oC.

Min. Volume

Random urine or 10 mL of well mixed urine from measured 24
hour collection.

Turn-Around-Time

One day

Intended Use

To check Magnesium balance. Magnesium urinary excretion is
enhanced by increasing blood alcohol levels, diuretics, Bartter syndrome,
corticosteroids, cis-platinum therapy and aldosterone. Renal magnesium
wasting occurs in renal transplant recipients who are on cyclosporine and
prednisone. Renal conservation of magnesium is diminished by
hypercalciuria, salt-losing conditions, and the syndrome of inappropriate
secretion of antidiuretic hormone.
Before and after therapeutic magnesium administration to further
investigate the significance of an apparent low serum
magnesium.

Limitations

Measuring range: 1.36 – 26.703
mg/dL

Patient Preparation

No patient preparation
needed

Adult Reference Ranges

4.10 – 13.80
mg/dL