A nurse in an urgent care clinic is caring for a client who reports muscle weakness after taking several over-the-counter diet pills. Which of the following laboratory results should be the nurse's priority?
Calcium 8.2 mg/dL
Phosphorous 5.1 mEq/L
Potassium 2.4 mEq/L
Sodium 145 mEq/L
The Correct Answer is C
Rationale:
A. Calcium of 8.2 mg/dL is slightly low but less immediately life-threatening.
B. Phosphorus 5.1 mEq/L is mildly elevated but usually less critical.
C. Potassium 2.4 mEq/L is significantly low (normal 3.5–5.0 mEq/L) and can cause muscle weakness, cardiac dysrhythmias, and is a medical emergency.
D. Sodium 145 mEq/L is within normal limits.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Rationale:
A. Metabolic acidosis is characterized by Kussmaul respirations (deep and rapid breathing), but not typically lightheadedness or paresthesias.
B. Metabolic alkalosis often presents with hypoventilation as the body tries to retain CO₂, not hyperventilation.
C. Respiratory acidosis results from hypoventilation, leading to CO₂ retention, not the excessive breathing seen in this case.
D. Respiratory alkalosis is caused by hyperventilation, which leads to excessive loss of CO₂, resulting in symptoms such as lightheadedness, confusion, paresthesias, and blurred vision — all present in this client.
Correct Answer is ["250"]
Explanation
Rationale:
To calculate the IV pump rate in mL/hr, use the formula:
mL/hr = Total volume (mL) ÷ Total time (hr)
Total volume = 500 mL
Total time = 2 hours
mL/hr = 500 ÷ 2 = 250
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