ARUP's Laboratory Test Directory

Magnesium, RBC : 0092079

Mnemonic: MG RBC

Methodology: Quantitative Inductively Coupled Plasma-Mass Spectrometry
Performed: Mon, Wed-Sat
Reported: 1-3 days
Specimen Required: Collect: Royal blue (EDTA).

Specimen Preparation: Centrifuge whole blood and separate RBCs. Transfer 2 mL RBCs to an ARUP Trace Element-Free Transport Tube (ARUP supply #43116). Available online through eSupply using ARUP Connect™ or contact ARUP Client Services at (800) 522-2787. (Min: 0.6 mL)

Storage/Transport Temperature: Room temperature. Also acceptable: Refrigerated.

Unacceptable Conditions: Frozen. Clotted or grossly hemolyzed specimens.

Stability (collection to initiation of testing): After separation from plasma: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: Unacceptable
Reference Interval:
1.5-3.1 mmol/L
Interpretive Data: RBC magnesium results reflect the intracellular stores and general homeostasis of magnesium. Results may be falsely low if RBCs in the submitted specimen are lysed or not promptly separated from plasma.

See Compliance Statement B: www.aruplab.com/CS
CPT Code(s): 83735
Cross References: Intracellular Magnesium (Magnesium, RBCs), MgRBCs (Magnesium, RBCs)