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

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, Roche-CSC Mpls, Roche-Grand Itasca, Roche-Lakes, Roche-Northland, Roche-Range, Roche-Ridges, Roche-Southdale, Roche-St. John's, Roche-UMMC East, Roche-UMMC West, Woodwinds)


Critical Range:
Site mg/dL
Woodwinds <1.1 and >4.0
All other sites (Vista and Roche) <1.0 and >7.0
Reference Range:
Site Age mg/dL
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
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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