which electrolyte imbalance is most concerning in a patient taking digoxin

ATI RN

ATI RN Exit Exam Test Bank

1. Which electrolyte imbalance is most concerning in a patient taking digoxin?

A. Monitor potassium levels
B. Monitor calcium levels
C. Monitor sodium levels
D. Monitor magnesium levels

Correct answer: A

Rationale: The correct answer is to monitor potassium levels. Patients taking digoxin are at risk of developing toxicity due to hypokalemia. Low potassium levels can potentiate the toxic effects of digoxin on the heart, leading to serious arrhythmias. Monitoring calcium levels (Choice B) is not the primary concern in patients taking digoxin. While calcium levels play a role in cardiac function, hypocalcemia is not directly associated with digoxin toxicity. Monitoring sodium levels (Choice C) is important for other conditions but is not the primary concern in a patient taking digoxin. Monitoring magnesium levels (Choice D) is also essential, but hypomagnesemia is not as directly linked to digoxin toxicity as hypokalemia.

2. A nurse is preparing to administer dopamine hydrochloride at 4 mcg/kg/min for a client weighing 80 kg. How many mL/hr should the nurse set the IV infusion to deliver?

A. 6 mL/hr
B. 8 mL/hr
C. 12 mL/hr
D. 16 mL/hr

Correct answer: A

Rationale: To calculate the correct rate, you first need to convert the weight to micrograms: 4 mcg/kg/min * 80 kg = 320 mcg/min. Then, convert micrograms to milligrams: 320 mcg/min / 1000 = 0.32 mg/min. Next, calculate how many milligrams per hour: 0.32 mg/min * 60 min/hr = 19.2 mg/hr. Finally, determine the mL/hr rate by using the concentration provided: 19.2 mg/hr / 800 mg in 250 mL = 6 mL/hr. Therefore, the correct answer is 6 mL/hr. Choice B, 8 mL/hr, is incorrect as it does not reflect the accurate calculation based on the weight and drug concentration. Choices C and D, 12 mL/hr and 16 mL/hr, are also incorrect as they do not align with the correct calculation of the infusion rate for dopamine hydrochloride based on the client's weight and the medication concentration.

3. What is the best intervention for a patient with respiratory distress?

A. Administer oxygen
B. Reposition the patient
C. Provide bronchodilators
D. Provide humidified air

Correct answer: A

Rationale: Administering oxygen is the best intervention for a patient with respiratory distress because it helps improve oxygenation levels and alleviates respiratory distress directly. Providing oxygen addresses the primary issue of inadequate oxygen supply, which is crucial in managing respiratory distress. Repositioning the patient, while important for airway clearance, may not address the immediate need for oxygen. Providing bronchodilators and humidified air can be beneficial in certain respiratory conditions, but when a patient is in respiratory distress, ensuring adequate oxygenation through oxygen administration takes precedence.

4. A healthcare professional is preparing to administer ceftriaxone IM to a client. Which of the following actions should the healthcare professional take?

A. Administer the medication using a tuberculin syringe
B. Administer the medication at a 45-degree angle
C. Use the dorsogluteal muscle for injection
D. Aspirate for blood return before injecting the medication

Correct answer: D

Rationale: Correct Answer: When administering intramuscular injections like ceftriaxone, it is essential to aspirate for blood return before injecting the medication to ensure that the needle is not in a blood vessel. Choices A and B are incorrect because ceftriaxone is typically administered using a syringe appropriate for IM injections (not a tuberculin syringe) and injected at a 90-degree angle rather than 45 degrees. Choice C is incorrect because the dorsogluteal site is no longer recommended for IM injections due to potential injury to the sciatic nerve and other structures.

5. A nurse is preparing to mix NPH and regular insulin in the same syringe. Which of the following actions should the nurse take?

A. Inject air into the NPH insulin vial.
B. Withdraw the prescribed dose of regular insulin.
C. Withdraw the prescribed dose of NPH insulin.
D. Mix the two insulins in separate syringes.

Correct answer: A

Rationale: When mixing NPH and regular insulin in the same syringe, the nurse should first inject air into the NPH insulin vial. This action prevents contamination by allowing an easier withdrawal of the correct dose of NPH insulin after withdrawing the regular insulin. Withdrawing the prescribed dose of regular insulin (Choice B) is incorrect as it does not address the initial step of injecting air into the NPH vial. Similarly, withdrawing the prescribed dose of NPH insulin (Choice C) is incorrect as it skips the crucial first step. Mixing the two insulins in separate syringes (Choice D) is not ideal since combining them in one syringe is a common practice to reduce the number of injections for the patient.