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HelpTest Code LAB12315 Magnesium, RBC
Department
SEND OUTS
Reference Lab Test Number
MGRBC
Collection Requirements
Patient should refrain from taking vitamins, or mineral herbal supplements for at least one week before sample collection.
Refer To
Warde Medical LabPrimary Collection Container
Lavender 6 mL (K3EDTA)
Alternate Collection Container
Royal Blue (K2EDTA) Trace Element
Transport
Send RBC’s refrigerated in in original dark blue EDTA tube after plasma has been removed. Label tube “Packed RBC’s”
RBC’s may also be sent refrigerated in a Quest trace element blood transport tube (lavender label). Label tube “Packed RBC’s”
Preferred Transport Temperature
Refrigerated
Processing
Centrifuge, separate, remove plasma, and send 0.5 mL RBC’s refrigerated in the original dark blue EDTA tube after plasma has been removed. Please label tube “Packed RBC’s”
RBCs may also be sent refrigerated in a Quest trace element blood transport tube (lavender label). Please label tube “Packed RBCs”.
Stability
Packed cells:
Ambient: 7 days
Refrigerated: 7 days
Frozen: Unacceptable
EDTA Whole blood:
Ambient: 4 days
Refrigerated: 7 days
Frozen: Unacceptable
Minimum Testing Volume
0.2 mL
Reference Range
4.0-6.4 mg/dL
Methodology
Quantitative Inductively Coupled Plasma/Mass Spectrometry
Performed
Monday and Thursday
Reported
4-8 days
CPT Codes
83735
Additional Information
Evaluate magnesium deficiency.
Submit Only the RBC’s to the Laboratory.