HESI RN
WGU HESI Med Surg Questions
Extract:
Question 1 of 5
The healthcare provider prescribes streptomycin 200 mg intramuscularly every 12 hours. The vial is labeled, 'Streptomycin 1 gram/2.5 mL.' How many milliliters should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
Correct Answer: 0.5
Rationale: The correct answer is 0.5 mL.
To find the answer, we can use the following formula: (mL to be administered) = (mg prescribed) / (mg per mL). Substituting the given values, we get: (mL to be administered) = (200) / (1000 / 2.5). Simplifying, we get: (mL to be administered) = (200) x (2.5 / 1000). (mL to be administered) = 0.5.
Therefore, the nurse should administer 0.5 mL of streptomycin from the vial to the client.
Question 2 of 5
A client is brought to the emergency center for fluid replacement after running a marathon, and the healthcare provider prescribes a 500 mL bolus of 0.9% normal saline to be administered over 4 hours. The infusion set delivers 10 gtt/mL, so the nurse should regulate the infusion to deliver how many gtt/minute? (Enter numerical value only. If rounding is required, round to the nearest whole number.)
Correct Answer: 21
Rationale:
To find the answer, we can use the following formula: (gtt/min) = (mL/hour) x (gtt/mL) / 60. Substituting the given values, we get: (gtt/min) = (500 / 4) x (10) / 60. Simplifying, we get: (gtt/min) = 125 x 10 / 60. (gtt/min) = 20.833. (rounded gtt/min) = 21.
Therefore, the nurse should regulate the infusion to deliver 21 gtt/minute of 0.9% normal saline.
Question 3 of 5
A 4-year-old is admitted with croup and receives a prescription for a single dose of dexamethasone 0.6 mg/kg IM. The child weighs 35 pounds. How many mg should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest whole number.)
Correct Answer: 10
Rationale:
To find the answer, we can use the following steps: Convert the child's weight from pounds to kilograms by dividing by 2.2. Multiply the weight in kilograms by the dosage in mg/kg. Round the result to the nearest whole number. Using these steps, we get: (weight in kg) = (35) / (2.2) = 15.909. (dose in mg) = (0.6) x (15.909) = 9.545. (rounded dose in mg) = 10.
Therefore, the nurse should administer 10 mg of dexamethasone to the child.
Question 4 of 5
A patient who weighs 91 kg receives a prescription for a continuous infusion of dopamine at 3 mcg/kg/min. The solution is labeled, “Dopamine 400 mg in 5% Dextrose injection 250 mL.†How many mL/hour should the nurse program the infusion pump to deliver?(Enter numeric value only. If rounding is required, round to the nearest tenth.)
Correct Answer: 10.2
Rationale:
To determine the infusion rate in mL/hour for the dopamine solution: Calculate the total dose per minute: 3 mcg/kg/min × 91 kg = 273 mcg/min. Convert mcg/min to mcg/hour: 273 mcg/min × 60 min/hour = 16,380 mcg/hour. Convert mcg to mg: 16,380 mcg ÷ 1,000 = 16.38 mg/hour. Determine the concentration of the solution: 400 mg ÷ 250 mL = 1.6 mg/mL. Calculate the mL/hour required: 16.38 mg/hour ÷ 1.6 mg/mL = 10.2375 mL/hour. Rounded to the nearest tenth: 10.2 mL/hour.
Question 5 of 5
The nurse is initiating a 500 mL IV of normal saline at 60 mL/hour for a client with heart failure. How many hours should the IV infuse? (Enter numeric value only. If rounding is required, round to the nearest tenth.)
Correct Answer: 8.3
Rationale: The correct answer is 8.3 hours.
To find the answer, we can use the following formula: (hours) = (mL of IV) / (mL/hour). Substituting the given values, we get: (hours) = (500) / (60). Simplifying, we get: (hours) = 8.333. (rounded hours) = 8.3.
Therefore, the IV should infuse for 8.3 hours.