Sign in →

Test Code LAB4778 Magnesium, RBC

Additional Codes

Test Name in EPIC

 EPIC Test Code

Mnemonic

 ARUP Test ID
Magnesium, RBC LAB4778 MG RBC 0092079

 

Useful For/Utility

May be useful in the assessment of tissue stores.

Methodology

Quantitative Inductively Coupled Plasma-Mass Spectrometry

Clinical Information

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.

RBC magnesium concentration is reported as milligrams per deciliter (mg/dL). To convert concentration to millimoles per liter (mmol/L), divide the result by 2.43.

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the U.S. Food and Drug Administration. This test was performed in a CLIA-certified laboratory and is intended for clinical purposes

Specimen Requirements

Collect
Royal Blue (EDTA).

Specimen Preparation
Centrifuge whole blood and separate RBCs from plasma within 2 hours of collection. 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
Specimens collected in tubes other than royal blue (EDTA). Specimens transported in containers other than Royal Blue (EDTA) tube or Trace Element-Free Transport Tube. Clotted or grossly hemolyzed specimens.
Stability
After separation from plasma: Ambient: 2 weeks; Refrigerated: 2 weeks; Frozen: Unacceptable

Specimen Transport Temperature

Ship Room Temp

Day(s) Test Set Up

Sunday-Saturday

Reported 1-4 days

Performing Laboratory

ARUP Laboratories

500 Chipeta Way

Salt Lake City, UT 84108-1221

Test Classification and CPT Coding

83735

Magnesium, RBC's LOINC 2597-3

Reference Values

3.6-7.5 mg/dL