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Test Code MG.1 MAGNESIUM

Additional Codes

N.MAGNESIUM

MG.

MAG.

Methodology

Automated Chemistry Analyzer

Specimen Requirements

Specimen Type: Serum or Plasma 
Container/Tube: SST or Lithium Heparin 

Acceptable: Red top 
Specimen Volume: 1 mL (minimum 0.5) 
Collection Instructions:  

  1. Allow specimen to clot completely if a serum tube (SST) was used. 
  2. Separate serum (SST) or plasma (Lithium Heparin) from cells within 24 hours and transport refrigerated. If red top tube is collected, separate serum from cells within 2 hours and place in separate plastic tube. 
  3. Properly label tube with patient's name, DOB, requisition number and type of tube, i.e. LiHep or NaHep etc. 

Specimen Rejection

1. Hemolyzed, icteric or lipemic samples

2. Exceeds stability requirements

3. Unlabeled/mislabeled specimen

Maximum Laboratory Time

24 hours

Specimen Transport/Stability

Refrigerated: 24 hours on gel, 3 days poured off

Test Classification and CPT Coding

83735

Day(s) Test Set Up

Daily

Reference Ranges

Magnesium            mg/dL
           1.6 - 2.6

                Critical :REFER TO LH-W CRITICAL VALUES POLICY