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Test Code MG Magnesium, Plasma

Methodology

Colorimetric/Calmagite

Performing Laboratory

St. Clair Hospital Laboratory

Specimen Requirements

1 plasma gel tube (1 mL of lithium heparin plasma). Centrifuge blood as soon as possible, or send unspun blood to laboratory within 4 hours of draw.

Reference Values

20-59 years:  1.6-2.6 mg/dL
60-89 years:  1.6-2.4 mg/dL
>90 years:  1.7-2.3 mg/dL
Critical values (automatic call-back):  <1.0 mg/dL or >3.0 mg/dL

Day(s) Test Set Up

Monday through Sunday