An adult client with myasthenia gravis is receiving pyridostigmine (Mestinon) 126 mg PO every 4 hours. The drug is available as 60 mg in 5 ml syrup. How many ml should the nurse administer? (If rounding is required, round to the nearest tenth.)
The Correct Answer is ["10.5"]
To calculate the volume of pyridostigmine to be administered, we can use the following formula:
Volume (mL) = Desired Dose (mg) / Concentration (mg/mL)
However, the concentration is given in mg/5 mL. We need to convert it to mg/mL:
Concentration (mg/mL) = 60 mg / 5 mL = 12 mg/mL
Now, plug in the given values into the formula:
Volume (mL) = 126 mg / 12 mg/mL
Volume (mL) = 10.5 mL
Therefore, the nurse should administer 10.5 mL of pyridostigmine syrup.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1"]
Explanation
To calculate the number of additional tablets needed, we'll first determine the total number of tablets required for the new dose of 30 mg.
Step 1: Calculate the total number of tablets needed for the new dose:
Total Tablets = Desired Dose (mg) / Tablet Strength (mg)
Total Tablets = 30 mg / 15 mg/tablet
Total Tablets = 2 tablets
Step 2: Determine the number of tablets already administered:
The client already received 1 tablet today.
Step 3: Calculate the number of additional tablets needed:
Additional Tablets = Total Tablets - Tablets Already Administered
Additional Tablets = 2 tablets - 1 tablet
Additional Tablets = 1 tablet
Therefore, the nurse should administer 1 additional tablet of aripiprazole (Abilify) to reach the total newly prescribed dose for the day.
Correct Answer is ["22"]
Explanation
Calculating the Propofol Infusion Rate
Step 1: Convert weight to kilograms:
198 lbs x (1 kg / 2.20462 lbs) ≈ 90 kg
Step 2: Calculate the desired dose rate in mcg/minute:
8 mcg/kg/minute x 90 kg = 720 mcg/minute
Step 3: Calculate the concentration of propofol in the IV solution:
100 mg/50 mL = 2 mg/mL
Step 4: Calculate the infusion rate in mL/hour:
First, convert mcg to mg:
720 mcg x (1 mg / 1000 mcg) = 0.72 mg/minute
Then, set up a proportion:
x mL/hour / 0.72 mg/minute = 60 minutes/hour / 2 mg/mL
Cross-multiply and solve for x:
x mL/hour = 0.72 mg/minute x 60 minutes/hour / 2 mg/mL
x mL/hour ≈ 21.6 mL/hour
Therefore, the nurse should program the infusion pump to deliver approximately 22 mL/hour.
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