The nurse is caring for a patient diagnosed with unstable angina who is prescribed metoprolol. The patient asks the nurse, "Why do I have to take this medication?" What response by the nurse is most accurate?

"This medication will decrease how hard your heart works."

"It is prescribed to dilate your coronary arteries."

"It will prevent any irregular heartbeats."

"This medication makes your heart beat more forcefully."

Answer and Explanation

The Correct Answer is A

A. Metoprolol, a beta-blocker, decreases the heart rate and reduces myocardial oxygen demand by lowering the workload on the heart, which is beneficial for managing unstable angina.

B. While metoprolol has some vasodilatory effects, its primary action is to reduce heart workload, not to dilate coronary arteries.

C. Although beta-blockers can reduce the risk of arrhythmias, the main purpose in angina management is to decrease cardiac workload.

D. Metoprolol does not make the heart beat more forcefully; instead, it decreases the force of contraction to reduce myocardial oxygen consumption.

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Correct Answer is C

Explanation

A. While lung injury could occur in traumatic situations, it is not the primary reason for mechanical ventilation in the context of a spinal cord injury.

B. A history of smoking may affect lung health but does not directly justify the immediate need for mechanical ventilation following a spinal cord injury.

C. The nerves that control lung function may be injured in a cervical spinal cord injury, particularly at higher levels like C3-C5, leading to respiratory muscle paralysis and necessitating mechanical ventilation to support breathing.

D. While unconsciousness may complicate breathing, the primary concern is the loss of function in the spinal cord nerves controlling respiration.

Correct Answer is ["16"]

Explanation

To calculate the dosage of Vancomycin, first convert the patient's weight from pounds to kilograms, knowing that 1 kg equals 2.2 lbs. The patient weighs 110 lbs, which is equivalent to 50 kg (110 lbs / 2.2). Next, multiply the patient's weight in kilograms by the prescribed dosage of 20 mg/kg, resulting in a total dosage of 1000 mg (50 kg * 20 mg/kg). Since the vials contain 500 mg per 8 mL, divide the total dosage required by the amount per vial to find out how many milliliters should be withdrawn. This results in 16 mL (1000 mg / (500 mg/8 mL)).

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ABG Value	Normal Range
pH	7.35- 7.45
PaCO2	35-45 mm Hg
HCO3	22-25 mEq/L
Base excess	-2 to +2
PaO2	80-95 mm Hg
SaO2	>95%

The nurse is caring for a patient diagnosed with unstable angina who is prescribed metoprolol. The patient asks the nurse, "Why do I have to take this medication?" What response by the nurse is most accurate?

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Naxlex Comprehensive Predictor Exams

A patient presents to the emergency department with a cervical spinal cord injury immediately after a motor vehicle crash. What should the nurse explain to the family as the reason for the patient being placed on mechanical ventilation? The:

Correct Answer is C

Explanation

A physician prescribes Vancomycin 20 mg/kg intravenous (IV). The patient weighs 110 lbs. The medication is available in vials which contain 500 mg per 8 mL. What should the nurse withdraw from the vial? (round to the nearest whole number)

Correct Answer is ["16"]

Explanation

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