Sign in →

Test 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.

Primary Collection Container

Royal Blue (K2EDTA) Trace Element

Alternate Collection Container

Lavender 6 mL (K3EDTA)

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.