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Magnesium, RBC : 623
Test CodeMAGNRB or 623
CPT Codes
83735
Instructions
Whole blood: Do not centrifuge whole blood. Patient should refrain from taking vitamins, or mineral herbal supplements for at least one week before sample collection. Packed RBC's: Centrifuge specimen and discard plasma within two hours of collection. Transfer RBC's to a plastic transfer vial.
Transport Container
Preferred:
0.5 mL packed RBC cells collected in an EDTA (lavender-top) tube or sodium heparin (royal blue-top) tube
Alternative:
1 mL whole blood collected in: EDTA (lavender-top) tube, EDTA (royal blue-top) tube, or sodium heparin (royal blue-top) tube
Minimum: 0.2 mL RBCs; 0.5 mL whole blood
0.5 mL packed RBC cells collected in an EDTA (lavender-top) tube or sodium heparin (royal blue-top) tube
Alternative:
1 mL whole blood collected in: EDTA (lavender-top) tube, EDTA (royal blue-top) tube, or sodium heparin (royal blue-top) tube
Minimum: 0.2 mL RBCs; 0.5 mL whole blood
Transport Temperature
Refrigerated.
Specimen Stability
Packed RBC cells:
Room temperature: 7 days; Refrigerated: 7 days; Frozen: Unacceptable
Whole blood:
Room temperature: 4 days; Refrigerated: 7 days; Frozen: Unacceptable
Room temperature: 7 days; Refrigerated: 7 days; Frozen: Unacceptable
Whole blood:
Room temperature: 4 days; Refrigerated: 7 days; Frozen: Unacceptable
Methodology
Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)
Setup Schedule
Monday, Thursday
Report Available
2-5 days
Reference Range
4.0-6.4 mg/dL
Clinical Significance
Magnesium is an essential trace element. Deficiency leads to irritability, neuromuscular abnormalities, cardiac and renal damage. Its salts are used as antacids and cathartics. Excessive amount may cause CNS depression, loss of muscle tone, respiratory and cardiac arrest.
Performing Laboratory
med fusion
