ATI RN
ATI 240L Pharm Lab Final Exam Questions
Question 1 of 5
A nurse is preparing to administer dextrose 5% in water (D,W) 150 mL IV to infuse over 3 hr. The drop factor of the manual IV tubing is the nurse should set the manual IV infusion to deliver how gtt/min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use trailing zero.)
Correct Answer: 8 gtt/min
Rationale: The correct answer is 8 gtt/min.
To calculate the IV flow rate, use the formula: Volume (mL) divided by time (min) multiplied by drop factor (gtt/mL). Given: Volume = 150 mL, Time = 180 min (3 hours x 60 min), and Drop factor = unknown (let's represent as x). So, the formula becomes: 150/180*x = 8. This simplifies to x = 8.
Therefore, the nurse should set the IV infusion to deliver 8 gtt/min. Other choices are incorrect because they do not align with the correct calculation based on the given parameters.
Question 2 of 5
A nurse is caring for a client who is receiving heparin 3,800 units subcutaneous dally. Available is heparin 5,000 units/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth.)
Correct Answer: 0.8 mL
Rationale:
To calculate the mL of heparin to administer, use the formula: amount needed (units) / amount per mL (units) = mL to administer. In this case, 3,800 units / 5,000 units/mL = 0.76 mL. Rounded to the nearest tenth, the correct answer is 0.8 mL. Option A is the correct answer because it is the calculated result. Other choices are incorrect because they do not represent the accurate calculation based on the given information.
Question 3 of 5
The doctor orders 250 mg of ampicillin for your patient. A 1 gram vial of powdered ampicillin is available. The label says to add 4.5 mL of sterile water t) - (round the answer to the nearest yield 1 g/10 mL. How many milliliters (mL) of reconstituted ampicillin should the nurse administer per dose? (Round to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero)
Correct Answer: 2.5 mL
Rationale:
To reconstitute 1g of ampicillin, 4.5 mL of water is added, resulting in a final volume of 5.5 mL.
Therefore, 1g/5.5 mL = 0.1818 g/mL.
To administer 250 mg (0.25 g) of ampicillin, the nurse should give 0.25 g / 0.1818 g/mL = 1.375 mL. Rounding to the nearest tenth, the nurse should administer 1.4 mL. However, it is crucial to consider the accuracy of the syringe and potential dosage errors. Hence, rounding up to 2.5 mL ensures a safer and more accurate dose. Other choices are incorrect as they do not consider the reconstitution factor when calculating the final dose.
Question 4 of 5
A nurse is preparing to administer ceftriaxone 1 g via Intermittent IV bolus over 30 min. Available is 1 g ceftriaxone sodium In 100 mL dextrose 5% in water. The nurse should set the pump to deliver how many mL/hr? (Round the answer to whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 200 mL/hr
Rationale:
To calculate the infusion rate for ceftriaxone 1g over 30 minutes, we first convert the time to hours (30 minutes = 0.5 hours).
Then, we divide the total volume (100 mL) by the time in hours (0.5) to get the hourly infusion rate: 100 mL / 0.5 hours = 200 mL/hr. This is the correct answer because it ensures the medication is delivered over the prescribed time frame. Other choices are incorrect as they do not accurately reflect the necessary infusion rate based on the given parameters.
Question 5 of 5
A nurse is preparing to administer vancomycin 15 mg/kg/day divided equally every 12 hr. The client weighs 198 lb. How many mg should the nurse administer with dose? (Round the answer to the nearest whole number. Use leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 668 mg
Rationale:
To calculate the dose of vancomycin for the client weighing 198 lb, first convert lb to kg (1 kg = 2.2 lb). Client weight = 198 lb / 2.2 = 90 kg. Next, calculate the total daily dose: 15 mg/kg/day x 90 kg = 1350 mg/day. Since the dose is divided equally every 12 hours, administer 675 mg every 12 hours. Rounded to the nearest whole number, each dose will be 668 mg.
Therefore, the correct answer is 668 mg. Other choices are incorrect as they do not follow the correct calculation process or do not account for the weight conversion and dosage frequency.