A client with an extrapyramidal reaction receives a prescription for diphenhydramine 35 mg IM. The medication is supplied as 50 mg/mL in a 1 mL prefilled single use syringe. How many mL should the nurse give? (Enter the numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["0.7"]
The nurse should administer 0.7 mL of diphenhydramine.
Here's the calculation:
Medication dosage: 35 mg (diphenhydramine)
Medication concentration: 50 mg/mL (given on the syringe label)
We need to find the volume (mL) containing the prescribed dose (35 mg) of diphenhydramine.
Volume to administer (mL) = Dose (mg) / Concentration (mg/mL)
Volume to administer (mL) = 35 mg / 50 mg/mL
Volume to administer (mL) = 0.7 mL (round to nearest tenth)
Therefore, the nurse should administer 0.7 mL of diphenhydramine
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["111"]
Explanation
Here's how to calculate the rate for the infusion pump:
Total volume to infuse: 1 liter (given)
Infusion time: 9 hours (given)
We need to find the volume delivered per hour (mL/hour) considering the total volume and infusion time.
Volume conversion: Since the volume is given in liters, convert it to mL:
1 liter * 1000 mL/liter = 1000 mL
Infusion rate (mL/hour):
Infusion rate (mL/hour) = Total volume (mL) / Infusion time (hours)
Infusion rate (mL/hour) = 1000 mL / 9 hours
Infusion rate (mL/hour) = 111.11 mL/hour (round to nearest tenth)
Therefore, the nurse should program the infusion pump to deliver approximately 111 mL/hour.
Correct Answer is ["22.9"]
Explanation
First, let’s convert the client’s weight from pounds to kilograms since the dosage is prescribed in mcg/kg/min. We know that 1 kg is approximately 2.2 lbs. So,
Weightinkg = 140lbs/2.2 ≈ 63.64kg
The prescribed dose is 6 mcg/kg/min. Therefore, the total dose for this client per minute would be:
Doseperminute=6mcg/kg/min×63.64kg = 381.84mcg/min
We need to convert this to mcg/hr since we want the rate in mL/hr and our final concentration is in mcg/mL. There are 60 minutes in an hour, so:
Doseperhour = 381.84mcg/min×60 = 22910.4mcg/hr
The IV bag contains 250 mg of dobutamine in 250 mL of solution. This is equivalent to 250,000 mcg in 250 mL, or 1000 mcg/mL.
Finally, we can find the rate in mL/hr by dividing the dose per hour by the concentration:
RateinmL/hr = 22910.4mcg/hr / 1000mcg/mL = 22.91mL/hr
If rounding is required to the nearest tenth, the nurse should program the infusion pump to deliver 22.9 mL/hr.
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