Pathology Handbook

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Magnesium

Laboratory:

Clinical Biochemistry

Test Code:

Specimen Types:

Blood

Container Types:

Lithium Heparin (with Gel)
SST

Adults Volume or Mass:

5 mL

Minimum/Paediatric Volume or Mass:

1 mL

Collection & Request Instructions:

Retrospective testing within 7 days

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.

Transport Instructions between Sites and/or Laboratories:

Room Temperature

Assay Frequency:

24/7

MBS Rebatable:

Yes

MBS Item No.:

66500

Billing Information:

Also MBS Item No. 66503, 66506, 66509 and 66512

Additional Notes:

Test is performed on Abbott Alinity

Reference Intervals (Adult 18 yrs+):

0.70 -1.10 mmol/L

R.I Source:

RCPA/AACB Harmonised Reference Intervals from 13/7/2015.

Age Related Reference Intervals:

< 1 week 0.6- 1.0 mmol/L

1 wk - < 18 yrs 0.65-1.1 mmol/L