A nurse is providing education to a client about magnesium oxide. Which of the following statements by the client indicates a correct understanding of magnesium oxide?

I will take magnesium oxide on an empty stomach.

I will take magnesium oxide with my morning coffee.

I will drink a full glass of water with the magnesium oxide.

I will crush the magnesium oxide tablets before taking them.

Answer and Explanation

The Correct Answer is C

Rationale:
A. Taking magnesium oxide on an empty stomach can cause gastrointestinal irritation; it’s best taken with food or water.
B. Coffee can interfere with absorption of some medications and may worsen GI upset; it's not recommended.
C. Drinking a full glass of water helps ensure proper dissolution and absorption of the medication and minimizes GI side effects.
D. Crushing magnesium oxide tablets is not recommended unless specifically directed, as some formulations are meant to be swallowed whole.

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Correct Answer is A

Explanation

Rationale:
A. pH: 7.48 is elevated (normal: 7.35–7.45). This indicates alkalosis. pCO₂: 42 mm Hg is normal (normal: 35–45 mm Hg). HCO₃⁻: 32 mEq/L is elevated (normal: 22–26 mEq/L) hence pointing towards a primary metabolic cause. Since the pH is high and the HCO₃⁻ is also high, with a normal pCO₂, this is clearly a case of metabolic alkalosis.

B. Respiratory acidosis would have low pH and high pCO₂.
C. Metabolic acidosis would have low pH and low HCO₃⁻.
D. Respiratory alkalosis would have high pH and low pCO.

A. Increased urine output B. Loss of gastric secretions C. Decreased oral intake D. Fever

Correct Answer is B

Explanation

Rationale:

A. Increased urine output: Mr. Allen's urine output is actually low (600 mL/24 hrs), and his urine is dark and concentrated, suggesting dehydration, not excessive urinary losses.

B. Loss of gastric secretions: Continuous suction via the nasogastric (NG) tube removes gastric fluids, which are rich in potassium, chloride, hydrogen ions, and magnesium. This is the main reason for his observed hypokalemia (K = 2.9), hypochloremia (Cl = 94), and low magnesium (Mg = 1.2).

C. Decreased oral intake: While Mr. Allen is NPO, reduced intake alone is not sufficient to cause such significant electrolyte imbalances in a short period. The active loss of electrolytes through NG suction is the primary contributor.

D. Fever is not mentioned in the scenario. Fever can lead to insensible fluid losses, but this is not relevant here and not the primary mechanism of electrolyte depletion.

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A nurse is providing education to a client about magnesium oxide. Which of the following statements by the client indicates a correct understanding of magnesium oxide?

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Naxlex Comprehensive Predictor Exams

Arterial blood gas levels are obtained for the client. If the client's results are pH 7.48, pCo2 42mmHg, and HCO3 32 mEq/L, the client is exhibiting which one of the following acid-base imbalances?

Correct Answer is A

Explanation

Use the scenario to guide your answer Exhibits What is the primary reason for electrolyte loss in a patient with an NG tube to suction?

Correct Answer is B

Explanation

Rationale:

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