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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Magnesium, Urine

Test Code(s): RMG / HCRMG

CPT Code(s): 83735

Methodology: Methylthymol Blue

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: 2 hours.
Routine: 4 hours.


Specimen Requirements

Specimen: Random urine

Collection Instructions: Collect random urine. No preservative necessary.

Collection Container: Preferred: Sterile screw cap container

Collection Volume: Preferred: Entire collection
Pediatrics: Entire collection

Sample Analyzed: Urine aliquot

Volume Required: Preferred: 1 mL
Pediatrics: 0.2 mL

Specimen Transport: Transport entire specimen to UWHC Core Laboratory (B4/220). Transport with coolant pack if coming from outreach location.


Interpretation

Random urines reported in mg/dL.

 

Reference ranges only available on urines with a collect time of 22-26 hours.

Additional Information:

For timed collection, refer to Magnesium, Urine, 24 hour.

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