Magnesium


Abbrev Code:MG   
Order Code:LAB103Order Name:Magnesium
Methodology:Roche: Colorimetric endpoint
Vista: Bichromatic endpoint
Woodwinds: Enzymatic
CPT Codes: 83735 x1, 83735 x1
Turnaround Time:Performed and reported 24 hours/day.
Associated Links:

Roche Go Live Schedule



Collection Instructions

Specimen:Blood
Optimal Volume:2.5 mL
Minimum\Peds Volume:0.6 mL
Collection Instructions:Chemistry Tests Containers Chart


Processing and Shipping

Specimen Processing:Centrifuge and aliquot 1.25 mL, 0.2 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:Roche: 7 days refrigerated; 1 year frozen.
Vista: 7 days at room temperature; 7 days refrigerated; 1 year frozen.
Test Performed at or Referral Lab Chemistry  (CSC Maple Grove, Grand Itasca, Northland, Oxboro Clinic, Range, Roche-CSC Mpls, Roche-Lakes, Roche-Ridges, Roche-St. John's, Roche-UMMC East, Southdale, UMMC/UMMCH-West Bank, Woodwinds)


Interpretive

Critical Range:
Site mg/dL
Woodwinds <1.1 and >4.0
Grand Itasca <1.2 and >5.9
All other sites (Vista and Roche) <1.0 and >7.0
 
Reference Range:
Site Age mg/dL
Grand Itasca All 1.9-2.7
St Johns/Woodwinds All 1.8-2.6
Vista 0-6 d 1.2-2.6
Vista 7d - 5y 1.6-2.4
Vista 6 y & older 1.6-2.3
Roche 0-2 y 1.6-2.7
Roche 3-5 y 1.6-2.6
Roche 6-8 y 1.6-2.5
Roche 9-11 y 1.6-2.4
Roche 12-17 y 1.6-2.3
Roche 18 y & older 1.7-2.3
https://www.mayocliniclabs.com/test-catalog/overview/8448#Clinical-and-Interpretive
Use:Hypomagnesemia, seen in malabsorption, pancreatitis, hypoparathyroidism, chronic alcoholism and DT's, chronic glomerulonephritis, aldosteronism, digoxin toxicity, protracted IV feedings and chlorothiazide therapy. Hypocalcemia refractory to treatment may occur if there is underlying hypomagnesemia. Hypermagnesemia is seen in dehydration, severe diabetic acidosis, Addison's disease, uremia, and iatrogenic MgSO4 therapy in obstetric patients with preeclampsia.


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