Electrolyte Balance- Magnesium : Nursing Course


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The normal range of magnesium in the body is:

1.5-2.5 mg/dL

Rationale: The normal range of magnesium in the body is 1.5-2.5 mg/dL. The magnesium level is indicated on the basic metabolic panel, along with the other major electrolytes. When magnesium levels are not balanced, it is common to see an imbalance of calcium and potassium as well. When levels of magnesium fall above or below these levels, mental status changes and cardiac symptoms are often present. Treating the underlying cause is essential to bringing the magnesium level to a normal range.


When treating muscle weakness in patients with hypermagnesemia, the medication to be administered is:

calcium gluconate

Rationale: With hypermagnesemia, patients may experience muscle weakness and decreased cardiac function. In order to counteract these effects, calcium gluconate may be administered because calcium acts as an antagonist in neuromuscular and cardiac function. If the patients does not have any renal impairment, then IV diuretics should also be administered. When renal function is impaired and the patient is symptomatic from hypermagnesemia, then dialysis may be indicated.


Hypomagnesemia increases a patient's risk of ventricular dysrhythmias because it increases:

cardiac muscle irritability

Rationale:

EKG changes that may be present with patients that have low magnesium levels are:

flat or inverted T wave

Rationale:

A patient that has ingested large amounts of antacids or laxatives may present with:

hypermagnesemia

Rationale:

Patients with cirrhosis and chronic alcoholism may present with:

hypomagnesemia

Rationale:

An electrolyte that is found primarily in the cell, and is responsible for energy production and protein metabolism is:

magnesium

Rationale:

Signs and symptoms of hypomagnesemia that a patient may present with are:

muscle weakness and tremors

Rationale:

EKG changes that are present with hypermagnesemia is:

prolonged PR interval

Rationale:

The major cause of hypermagnesemia is:

renal failure

Rationale:

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