ATI LPN
ATI LPN Pharmacology Exam Questions
Extract:
Question 1 of 5
Order: 1000 mL of D5½NS with 1 ampule of multiple vitamins to infuse over 8 hours Available: Macrodrip set: 15 gtt/mL Calculate the IV flow rate in gtt/min.
Correct Answer: A
Rationale: Flow rate = (1000 mL / 8 hr × 15 gtt/mL) / 60 = 31.25 gtt/min, rounded to 31 gtt/min.
Question 2 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: Dose = 15 mcg/min × 60 = 900 mcg/hr. Concentration = 25 mg / 250 mL = 100 mcg/mL. Flow rate = 900 / 100 = 9 mL/hr.
Question 3 of 5
When administering an antianginal drug such as nitroglycerin (NTG) the nurse identifies which as the most common response.
Correct Answer: C
Rationale: Nitroglycerin causes vasodilation, leading to hypotension.
Question 4 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 5 of 5
Calculate the flow rate I mL/hr. and Units/hr. (Equipment used is programmable in whole mL/hr and Show all work) Order: 25,000 units of Heparin in 250 mL to infuse at 11 mL/hr. Calculate rate in units/hr.
Correct Answer: D
Rationale: Concentration = 25,000 units / 250 mL = 100 units/mL. Units/hr = 11 mL/hr × 100 units/mL = 1100 units/hr.