Test Name

Magnesium

Test Code

258

Unit

mg/dL

Station

Chemistry

Synonym Name/Abbreviation

Mg

CPT Code

83735

Performing Facility

American Medical Labs, Herzliya
Pituah

Analyzer

Roche cobas 6000

Test Method

Spectrophotometry

AML Preferred Tube

5 mL SST gel

Storage Instructions

Refrigerated.

Separate serum from cells within 45 minutes

Stability:

 7 days at 15 to
25 ^oC

 7 days at 2 to 8
^oC

1 year at -25 to -15 ^oC.

Min. Volume

1 mL

Turn-Around-Time

One day

Intended Use

For diagnosis and monitoring of hypo and hypermagnesemia.
Magnesium is elevated in renal failure; decreased in cardiac arrythmias,
and is associated with hypocalcemia, hypokalemia, long-term
hyperalimentation, intravenous therapy, diabetes mellitus, alcoholism, and
other types of malnutrition &
malabsorption.

Limitations

Hemolyisis causes falsely elevated results. Measuring
range:  0.243 to 4.86 mg/dL. In
very rare cases of  gammopathy
(Waldestrom macroglobulinemia) may cause unreliable
results

Patient Preparation

No patient preparation
needed

Reasons for Rejection

Plasma sample ( EDTA, F or oxalate); gross hemolysis;
improper labeling.

Adult Reference Ranges

 1.58 to 2.55
mg/dL