A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Magnesium, RBC
MessageLab only orderable
Test Code
#MGRBC
Quest Code
623
Alias/See Also
MG, RBC
CPT Codes
83735
Preferred Specimen
1 mL whole blood collected in: EDTA (lavender-top) tube or EDTA (royal/dark blue-top) tube
Patient Preparation
Patient should refrain from taking vitamins, or mineral herbal supplements for at least one week before sample collection
Minimum Volume
0.5 mL whole blood
Other Acceptable Specimens
0.5 mL packed cells collected in an EDTA (lavender-top or dark blue-top) tube
Instructions
Do not centrifuge whole blood.
Alternate specimen: Centrifuge to separate plasma from RBC's and discard plasma. Transfer RBC's to a plastic transfer vial from a Quest Diagnostics (trace element and metal free) collection kit or transfer to a plastic screw cap vial.
Alternate specimen: Centrifuge to separate plasma from RBC's and discard plasma. Transfer RBC's to a plastic transfer vial from a Quest Diagnostics (trace element and metal free) collection kit or transfer to a plastic screw cap vial.
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Packed RBC cells
Room temperature: 7 days
Refrigerated: 7 days
Frozen: Unacceptable
Whole blood
Room temperature: 4 days
Refrigerated: 7 days
Frozen: Unacceptable
Room temperature: 7 days
Refrigerated: 7 days
Frozen: Unacceptable
Whole blood
Room temperature: 4 days
Refrigerated: 7 days
Frozen: Unacceptable
Methodology
Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Set up: Tues-Sat; Report Available: 4-5 days
Reference Range
4.0-6.4 mg/dL
Clinical Significance
Magnesium is an essential trace element. Deficiency leads to irritability, neuromuscular abnormalities, cardiac and renal damage. Its salts are used as antacids and cathartics. Excessive amount may cause CNS depression, loss of muscle tone, respiratory and cardiac arrest.
Performing Laboratory
Quest Diagnostics Valencia Nichols Institute
27027 Tourney Road
Valencia, CA 91355-5386