Test Code LAB103 Magnesium
Performing Lab
Arnot Ogden Medical Center/ Ira Davenport Memorial Hospital
Ordering Recommendations
Magnesium levels may be used to monitor preeclampsia patients being treated with magnesium sulfate, although in most cases monitoring clinical signs (respiratory rate and deep tendon reflexes) is adequate and blood magnesium levels are not required.
Collect
Serum or Plasma
Collection Device
Lithium Heparin Green Top Tube or Gold Top Tube
Specimen Handling
Centrifuge within 2 hours of collection.
Stability (from collection to initiation)
Room Temp |
8 Hours |
Refrigerated | 1 week |
Frozen | Undetermined |
Storage/Transport Temperature
Refrigerated
Specimen Volume
5 mL
Minimum Requirements
1 mL
Remarks
TURN AROUND TIME
STAT | 1 Hour |
Routine | 8 Hours |
Methodology
Timed Endpoint Absorbance
Start Date
9/13/2017
Last Review Date
07/08/2025
7/11/25 AP