ATI LPN Pharmacology Exam | Nurselytic

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ATI LPN Pharmacology Exam Questions

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Question 1 of 5

A nurse is preparing to administer nitroglycerine 15 mcg/min by continuous IV infusion. Available is nitroglycerin 25 mg in 250 mL of dextrose 5% in water (D5W). The nurse should set the IV pump to deliver how many mL/hr? (Round to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.

Correct Answer: A

Rationale:
To calculate the mL/hr rate for nitroglycerin infusion, we need to convert 15 mcg/min to mg/hr. Given 25 mg in 250 mL, we can set up a proportion to find the rate. 15 mcg/min = 15/1000 mg/min = 0.015 mg/min.
Then, 0.015 mg/min x 60 min/hr = 0.9 mg/hr. Next, we find the mL/hr by setting up a proportion: 25 mg/250 mL = 0.9 mg/x mL. Cross multiply to get x = (0.9 * 250) / 25 = 9 mL/hr.
Therefore, the correct answer is A (9 mL/hr).

Choices B, C, and D are incorrect because they do not align with the calculated mL/hr rate based on the dosage and concentration provided.

Question 2 of 5

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Question 3 of 5

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Question 4 of 5

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Question 5 of 5

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