Magnesium RBC
Test Mnemonic
MAGRBC
CPT Codes
- 83735 - QTY (1)
LOINC ®
2597-3
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Red blood cells | EDTA (Royal blue) | Ambient | Collect in a trace metal-free EDTA tube (royal blue top). Centrifuge and separate red blood cells (RBCs) and plasma within 4 hours of collection. Discard plasma. Keep RBCs in the original collection tube. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Red blood cells | EDTA (Lavender) | Ambient | Centrifuge and separate red blood cells (RBCs) and plasma within 4 hours of collection. Discard plasma. Keep RBCs in the original collection tube. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL | Red blood cells |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | After separation from plasma: 1 week |
| Refrigerated | After separation from plasma: 1 month |
| Frozen | After separation from plasma: Unacceptable |
Days Performed
Tue, Fri
Turnaround Time
3 - 5 days
Methodology
| Name | Description |
|---|---|
| Inductively Coupled Plasma / Mass Spectrometry (ICP-MS) |
Reference Range
| Magnesium RBC | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Normal | 4.0-6.5 | mg/dL |
Special Info
Specimens that are not processed within 4 hours of collection are not acceptable (whole blood specimens must be centrifuged and all plasma must be removed from the red blood cells). In addition, specimens that are improperly/inadequately labeled or frozen are not acceptable. Specimen must be received in a certified metal free tube.
Clinical Info
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.