Magnesium
Testing Information
Sample Type
Serum
Test Codes
631310
CPT Code
83735
Testing Area
Core Lab - Chemistry
Test Methodology
Abbott Alinity - Enzymatic
Reference Range
1.7-2.5 mg/dLCritical Value: <1.0, >6.0 mg/dL
Expected Turnaround Time
Results Available 24 hours from Receipt
Specimen Collection Criteria
Collect one gold top SST tube (minimum whole blood: 4 mL). Let specimen clot for 30-60 minutes and then centrifuge to separate serum from cells. Refrigerate after centrifugation.
Rejection Criteria
Grossly hemolyzed specimens, quantity not sufficient, improperly labeled
Specimen Validity and Retention
Centrifuged SST Tubes:Room Temperature (20-25°C): 24 hoursRefrigerated (2-8°C): 7 daysFrozen (-20°C or greater): UnacceptableSerum Aliquots:Room Temperature (20-25°C): 24 hoursRefrigerated (2-8°C): 7 daysFrozen (-20°C or greater): 7 daysSpecimens retained for 7 days after testing
Courier Transportation
Transport centrifuged tube refrigerated (2-8°C)
Clinical Utility
Magnesium is measured in correlation with those that have heart arrhythmias, hypocalcemia, or renal failure.
