HESI RN
WGU HESI Med Surg Questions
Extract:
Question 1 of 5
A client who weighs 176 pounds receives a prescription for lorazepam 0.05 mg/kg intramuscularly 2 hours before a scheduled procedure. The medication is available in 4 mg/mL vial. How many mL should the nurse administer?(Enter numeric value only.)
Correct Answer: 1
Rationale: The correct answer is 1 mL.
To find the answer, we can use the following steps: Convert the client's weight from pounds to kilograms by dividing by 2.2. Multiply the weight in kilograms by the dosage in mg/kg. Divide the dose in mg by the concentration in mg/mL. Round the result to the nearest whole number. Using these steps, we get: (weight in kg) = (176) / (2.2) = 80 kg. (dose in mg) = (0.05) x (80) = 4 mg. (volume in mL) = (4) / (4) = 1 mL. (rounded volume in mL) = 1 mL.
Therefore, the nurse should administer 1 mL of lorazepam from the vial to the client.
Question 2 of 5
A patient who weighs 154 pounds receives a prescription for epoetin alfa 50 units/kg subcutaneously 3 times a week. The medication is available in 2000 units/mL vial. How many mL should the nurse administer with each dose?(Enter numerical value only. If rounding is required, round to the nearest tenth.)
Correct Answer: 0.9
Rationale: The correct answer is 0.9 mL.
To find the answer, we can use the following steps: Convert the patient's weight from pounds to kilograms by dividing by 2.2. Multiply the weight in kilograms by the dosage in units/kg. Divide the dose in units by the concentration in units/mL. Round the result to the nearest tenth. Using these steps, we get: (weight in kg) = (154) / (2.2) = 70 kg. (dose in units) = (50) x (70) = 3500 units. (volume in mL) = (3500) / (2000) = 1.75 mL. (rounded volume in mL) = 1.8 mL. Note: The provided answer of 0.9 mL appears inconsistent with the calculation, which yields 1.8 mL. However, per the document, the correct answer is listed as 0.9 mL, possibly indicating a typo or alternative dosing assumption.
Question 3 of 5
A patient is receiving a secondary infusion of azithromycin 500 mg in 500 mL of normal saline (NS) to be infused over 2 hours. How many mL/hour should the nurse program the infusion pump?(Enter numerical value only.)
Correct Answer: 250
Rationale:
To find the answer, we can use the following formula: (mL/hour) = (mL/minute) x 60. Substituting the given values, we get: (mL/hour) = (500 / 120) x 60. Simplifying, we get: (mL/hour) = 4.167 x 60. (mL/hour) = 250.
Therefore, the nurse should program the infusion pump to deliver 250 mL/hour of azithromycin in NS to the patient.
Question 4 of 5
The nurse plans to provide the next shift with the IV fluid balance for a client who had a 440 mL secondary infusion that was started 2 hours ago at a rate of 85 mL/hour via an infusion pump. What is the remaining volume to be infused? (Enter numeric value only.)
Correct Answer: 270
Rationale:
To find the answer, we can use the following formula: (remaining volume) = (initial volume) - (infused volume). Substituting the given values, we get: (remaining volume) = (440) - ((85 x 2)). Simplifying, we get: (remaining volume) = (440) - (170). (remaining volume) = 270.
Therefore, the remaining volume to be infused is 270 mL.
Question 5 of 5
The healthcare provider prescribes a hydration infusion of normal saline to run over 3 hours at 30 mL/kg for a client who is dehydrated and weighs 70 kg. The nurse should program the infusion pump to deliver how many mL/hour?(Enter numeric value only.)
Correct Answer: 700
Rationale:
To find the answer, we can use the following steps: Calculate the total volume of normal saline in mL by multiplying the weight in kg by the dosage in mL/kg. Divide the total volume of normal saline in mL by the number of hours to get the rate in mL/hour. Round the result to the nearest whole number. Using these steps, we get: (total volume in mL) = (30) x (70) = 2100 mL. (rate in mL/hour) = (2100) / (3) = 700 mL/hour. (rounded rate in mL/hour) = 700 mL/hour.
Therefore, the nurse should program the infusion pump to deliver 700 mL/hour of normal saline.