ATI LPN
ATI LPN Pharmacology Exam Questions
Extract:
Question 1 of 5
A nurse is preparing to administer dopamine 3mcg/kg/min by continuous IV infusion to a preschooler who weighs 41.8 bs. Available is dopamine 400 mg in dextrose 596 in water (D5W) 250 mL. The nurse should set the IV pump to deliver how many ml/hr? (Round to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: A
Rationale: Weight = 41.8 lb × 0.453592 = 18.96 kg. Dose = 3 mcg/kg/min × 18.96 kg × 60 = 3412.8 mcg/hr. Concentration = 400 mg / 250 mL = 1.6 mg/mL = 1600 mcg/mL. Flow rate = 3412.8 / 1600 = 2.13 mL/hr, rounded to 2.1 mL/hr.
Question 2 of 5
Calculate the following dosage using ratio and proportions method. Round answers to the nearest tenth. Order: Tegretol 200 mg p.o.t.i.d. Available
Correct Answer: B
Rationale: Assuming 100 mg tablets (implied), 200 mg / 100 mg/tab = 2 tablets.
Question 3 of 5
Order: ceftriaxone 2 g in 100 mL of 0.9% NaCI (normal saline solution) over 30 minutes Available: Macro drip set: 15 gtt/mL Calculate the IV flow rate in gtt/min.
Correct Answer: A
Rationale: Flow rate = (100 mL / 30 min) × 15 gtt/mL = 50 gtt/min.
Question 4 of 5
Using abbreviations and the rules of the metric system, express the following quantities correctly: Six hundredth:
Correct Answer: B
Rationale: Six hundredths = 0.06 g in metric notation.
Question 5 of 5
What factors affect physiological response to drug use?
Correct Answer: A
Rationale: Age, weight, and sex directly influence drug absorption, metabolism, and excretion.