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HelpOrder Code MG Magnesium, Plasma or Serum
Specimen Requirements
Collection Container/Tube:
Preferred: Green-top (lithium heparin) gel tube.
Acceptable: Plain, red-top tube or a serum gel tube
Specimen Volume: 2 mL
Pediatric (minimum) volume: 0.5 mL in a green top (lithium heparin) MICROTAINER gel tube
Specimen Minimum Volume
0.5 mL
Performing Laboratory
Ridgeview Medical Center Laboratory
Two Twelve Medical Center Laboratory
Sibley Medical Center
Day(s) Test Set Up
Monday through Sunday
Methodology
Bichromatic endpoint
Specimen Transport Temperature
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum/plasma | Ambient | 7 days |
| Refrigerated (preferred) | 7 days | |
| Frozen | 12 months |
Test Classification and CPT Coding
83735
Useful For
Quanitative determination of magnesium
Reference Values
1.8-2.4 mg/dL
Critical values (automatic call-back):
Low: <1.0 mg/dL
High: >5.0 mg/dL