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Magnesium

SIM

11770 

CPT

83735 

Synonyms

MG 

Specimen Type

Plasma or serum 

Container

3.5 ml Green - Lithium heparin plasma separator 
4.0 ml Gold-top serum separator Green 

Collection Instructions

None

Volume

2 ml plasma or serum 
Min: 0.5 ml 

Additional Information

None

Patient Preparation

None

Specimen Processing Instructions

Plasma:  Centrifuge at 3380 rpm’s (±100) for a minimum of 10 minutes

Serum:  Allow to clot.  Centrifuge at 3380 rpm’s (±100) for a minimum of 10 minutes

Centrifuge within 2 hours of collection.

Transport Requirements

Refrigerated

Specimen Stability

Room Temperature: 8 hours;  Refrigerated: 5 days 

Rejection Criteria

•  If not centrifuged within 2 hours of collection. 
•  Gross Hemolysis 

Reference Range

1.7 – 2.4 mg/dL

Critical Value

Lower limit = <1;  Higher limit = >5 

Test Includes

Magnesium 

Methodology

Timed Endpoint method 

Testing Frequency

Daily, Monday - Sunday 

 

Reviewed By

Sandy Hammett 

Reviewed Date

2/19/2018

Supplemental

 

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