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Laboratory Test Directory

Magnesium, Urine Output (Updated)

Components

Name Method Department Units
Magnesium, Urine Timed Colorimetric, reflectometry
Core Lab, Chemistry, Routine

Specimen Requirements

Urine, 24 hours

Container Type Container Size Specimen Volume
Preferred

24 hour urine container

N/A
Stability

Refrigerated - 1 week(s)
Room temperature - 1 week(s)
Frozen - 1 month(s)

Specimen Preparation

  • Refrigerate during collection
  • Urine collection: Note start and stop dates and times on requisition
  • Ship entire specimen to laboratory refrigerated

Reasons for Rejection

  • Use of urine preservative
  • Loss of some specimen during collection
  • Collected in diaper or cotton balls

Comments

Record start and stop time and date on the requisition. Instruct patient on proper collection. At the beginning of collection have patient void and discard this urine. Begin timing collection at this point and collect all urine until the end of the collection period. Have patient void and save urine at the final collection point.

CPT Code

  • 83735