The nurse is reconstituting a powdered medication that is labeled, "Add 2.5 mL of normal saline to make 1 gram per mL." The dient's prescription is for 500 mg of the medication. How many mL should the nurse administer to this client? (Enter numeric value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["0.5"]
Here's how to calculate the volume the nurse should administer after reconstituting the medication:
1. Reconstitution and Concentration:
The medication label states adding 2.5 mL of normal saline will make a solution with a concentration of 1 gram per mL. This means after reconstituting, each 1 mL of the solution will contain 1 gram of medication.
2. Dose conversion:
The client's prescription is for 500 mg. We need to convert it to grams since the concentration is in grams per mL.
Conversion: 1 gram (g) = 1000 milligrams (mg)
Prescribed dose (g) = 500 mg / 1000 mg/g
Prescribed dose (g) = 0.5 g (round to nearest tenth)
3. Calculate the volume to administer:
We know the concentration after reconstitution (1 gram/mL) and the desired dose in grams (0.5 g).
Volume to administer (mL) = Dose (g) / Concentration (g/mL)
Volume to administer (mL) = 0.5 g / 1 g/mL
Volume to administer (mL) = 0.5 mL (round to nearest tenth as requested)
Therefore, the nurse should administer approximately 0.5 mL of the reconstituted medication to the client.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1"]
Explanation
Here's the breakdown:
Prescribed dose: 2 mg midazolam (given)
Vial concentration: 4 mg/2 mL (label)
We need to find the volume containing the 2 mg dose considering the concentration.
Calculation:
Volume (mL) = Dose (mg) / (Concentration (mg/mL) / 2)
We divide the concentration by 2 because we need the volume that delivers 2 mg (half the concentration).
Volume (mL) = 2 mg / (4 mg/mL / 2)
Volume (mL) = 2 mg / 2 mg/mL
Volume (mL) = 1 mL
Therefore, the nurse should administer 1 mL of midazolam to deliver the prescribed dose of 2 mg.
Correct Answer is ["8"]
Explanation
You can calculate the number of acyclovir tablets the nurse should administer every 24 hours using the following steps:
Daily Dosage: The medication is prescribed to be given every 6 hours, so to find the total daily dosage, we need to consider how many times it's administered in 24 hours:
Total Daily Doses = 24 hours / Dosage Frequency (every 6 hours)
Total Daily Doses = 24 hours / 6 hours/dose = 4 doses per day
Tablets per Dose: Since the prescribed dose is 800 mg and each tablet is 400 mg, we can find the number of tablets needed per dose:
Tablets per Dose = Prescribed Dose (mg) / Tablet Strength (mg/tablet)
Tablets per Dose = 800 mg / 400 mg/tablet = 2 tablets/dose
Total Tablets per Day: Now that we know the tablets needed per dose (2) and the total daily doses (4), we can find the total number of tablets for 24 hours:
Total Tablets per Day = Tablets per Dose x Total Daily Doses
Total Tablets per Day = 2 tablets/dose * 4 doses/day
Total Tablets per Day = 8 tablets
Therefore, the nurse should administer 8 tablets of acyclovir to the client every 24 hours.
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