Pathology Handbook

Magnesium

Synonyms

Mg

Clinical Indications

Investigation of low potassium levels, bone abnormalities, patients with D&V or fluid abnormalities

Request Form 

Request on ICE

Availability

On request

In patient with a low potassium level, magnesium will automatically be added to the request

Specific Criteria

None

Turnaround Time

Same day 

Specimen

Serum; yellow top (SST) tube 

Volume

2 mL

Container

Vacutainer gold top

Causes for Rejection

Unlabelled sample
Haemolysis
Delay in sample reaching laboratory

Reference Range

0.7 - 1.0 mmol/L