- Test Name
- Magnesium, Urine
- Aliases
- UMG
- Provincial Mnemonic
- MAGPU24H
- LOINC Test Code
- XNL00359-0
- Description and Primary Use
- Magesium plays an important role in many biochemical reactions including nerve and muscle function, bone development, energy production and more. Urinary magnesium excretion should be interpreted in concert with serum magnesium levels. In the presence of hypomagnesemia, a fractional excretion >0.5% suggests renal magnesium wasting. Lower values suggest inadequate magnesium intake and/or gastrointestinal losses. In the presence of hypermagnesemia, urinary magnesium levels provide an indication of current magnesium intake.
- Reorder interval
- Not yet defined
- TAT
- ≤3 Days
- Test Cost
- Not Available
- Tier
- 1 - General Availability
- Ordering Requirements (Restrictions / Conditions)
No Restrictions
- Required Consultations
- None
- Algorithms and Guidelines
None
- Special Patient Preparation
24 hour urine collection.
- Special Collection / Transport / Processing Requirements
24hr urine sample must be acidified with 25mL of 6N HCL is preferred (0.1mL to 10mL of urine) (Note: low 24hr urine output less than 1000mLs, pre-added HCL as a preservative, may be present in excess and affect test results. Other acceptable preservative is 10g of Boric Acid added to the 24hr container.
- Criteria for Rejection
Based on specimen condition and stability
- Laboratory Service Area
- Clinical Chemistry
- Performing Laboratory / Site
- Category 4 Laboratory (HSC only)
- Last Updated
- 04-Sep-19