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Test & Collection Guide

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Magnesium

Alternate names:
Mg
Laboratory:
Biochemistry
Test Code:
MG
Specimen types:
Serum
Container types:
Plain Tube with gelPlain Tube with gel
Collection Instructions:
Transport specimen at Room Temperature to lab
Sample haemolysis may make this test unreportable
Minimum Adult Volume:
1 mL
Paediatric Minimum Volume:
0.5 mL
Notes:

Serum Magnesium concentration varies with protein concentration (20-30% is protein-bound), acid-base status and carbohydrate intake (compare potassium) and thus may not reflect the total body stores.

Frequency:
Daily
Result Turnaround Time:
4 hours
Reference Interval:

<1 week         0.6-1.00 mmol/L

1W-18Y          0.65-1.10 mmol/L

18Y-120Y       0.70-1.10 mmol/L