Magnesium, 24h Urine

Alternative Names/Synonyms	Mg
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Biochemistry
Specimen Type	Urine
Test Code	MGUD

Clinical Significance (If applicable)

Assisting in workup of magnesium disorders.

Assessing risk of kidney stones.

Specimen Requirements (Sample Type)

Urine

Specimen Requirements (Volume (mL))

5 mL

Specimen Requirements (Tube Type)

24h Urine Collection Container (No Additive)

Collection Requirements

Collection Instructions

Sample Stability

Room Temperature: 3 days

Fridge: 3 days @ 2-8°C

Freezer: 1 year @ -20°C

Cause for Rejection

Specimen Acceptability and Transport Guidance

Instrument, Methodology

Roche cobas c 702, colourimetric

Test Availability

24 hours a day, 7 days a week

Routine Turnaround Time

3 hours

Reference Ranges

1.00 - 7.00 mmol/day
In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.

Laboratory Contact Information

416-586-4800 extension 4688