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Test Code MG Magnesium

Performing Laboratory

ChristianaCare:

  • Newark Campus
  • Middletown Campus
  • Helen Graham Cancer Center
  • Wilmington Campus

Methodology

Formazen Dye

Specimen Requirements

Container/Tube:  Preferred: 4.5 mL Lithium Heparin (Mint Green top PST Gel) tube

Acceptable: 5.0 mL SST (Gold top) tube or 6.0 mL Serum (Red top) tube

Specimen:  Full tube
Collection Instructions:  For pediatrics, draw blood in a 0.5-mL green-top MICROTAINER®.

Note:  Label tube with patient’s full name and 1 additional unique patient identifier such as  date of birth, medical record number, emergency ID number, date and time of draw, collector’s initials, and type of specimen.

Reference Values

1.7-2.4 mg/dL

Critical values (automatic call-back):  <1.0 mg/dL or >4.8 mg/dL

Day(s) Test Set Up

Monday through Sunday

Routine Turnaround Time:  8 hours

STAT Turnaround Time:  1 hour