Magnesium (Mg)

 Magnesium is used as an index to determine metabolic activity and renal function. Magnesium is needed in the blood-clotting mechanisms, regulates neuromuscular activity, acts as a cofactor that modifies the activity of many enzymes, and has an effect on the metabolism of calcium.

Normal Magnesium Lab Value

  • 1.6 to 2.6 mg/dL

Nursing Considerations

  • Prolonged use of magnesium products causes increased serum levels.
  • Long-term parenteral nutrition therapy or excessive loss of body fluids may decrease serum levels.