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Lpn nsg122 dosage calculation exam
Total Questions : 17
Showing 10 questions, Sign in for moreA nurse is preparing to administer 0.9% sodium chloride IV infusion 1 L bag at a rate of 500 mL/hr. The nurse should expect the IV pump to infuse over now my hours? Round to the nearest whole number. Enter numeric value only (numbers and decimal points only, no commas or labels)
Explanation
Identify the given information:
Total volume to be infused: 1 L=1000 mL
Infusion rate: 500 mL/hr
Identify the formula:
Time = Total Volume / Infusion Rate
Substitute the values into the formula:
Time = 1000 mL / 500 mL/hr
Calculate the time:
Time = 2 hours
A nurse is preparing to administer hydrocortisone 150 mg IM daily to a client. Available is hydrocortisone 400 mg/2 mL. How administer per dose? Round off to the nearest tenths place. Enter numeric value only (numbers and decimal points only, no commas or labels)
Explanation
Identify the formula for volume to administer:
Volume (mL)=Dose ordered (mg)/Available concentration (mg/mL)
Determine the concentration (mg/mL):
Available concentration=400 mg/2 mL=200 mg/mL
Substitute the given values into the formula:
Dose ordered = 150 mg
Concentration = 200 mg/mL
Volume=150/200=0.75 mL
Round to the nearest tenth if necessary:
0.75mL rounds to 0.8 mL
A nurse is providing discharge teaching to the parent of a child who is prescribed diphenhydramine elixir 12.5 mg every 4 hr as needed. The amount available is diphenhydramine elixir 50 mg/5 mL. How many mL should the nurse administer per dose? Round to the nearest tenths place. Enter numeric value only (numbers and decimal points only, no commas or labels)
Explanation
Identify the given information:
Prescribed dose: 12.5 mg of diphenhydramine elixir
Available concentration: 50 mg/5 mL
Determine the volume to be administered:
We can set up a proportion to solve for the unknown volume (X):
50 mg/5 mL = 12.5 mg/X mL
Cross-multiplying gives us:
50 mg x X mL = 12.5 mg x 5 mL
Simplifying:
50X = 62.5
Solving for X:
X = 62.5 / 50 = 1.25 mL
Round off to the nearest tenth:
1.25 rounds off to 1.3 mL
A nurse is caring for a client who has a new order for enoxaparin 32 mg subcutaneous every 12 hr. How many mg should the nurse administer per day Round to the nearest whole number. Enter numeric value only (numbers and decimal points only, no commas or labels)
Explanation
Identify the information given:
Prescribed dose: 32 mg of enoxaparin
Frequency: Every 12 hours
Determine the total daily dose:
The nurse administers the medication twice a day (every 12 hours).
Total daily dose is: 32 mg/dose x 2 doses/day = 64 mg/day
A nurse is preparing to administer fluoxetine 80 mg PO daily. The amount available is fluoxetine 20 mg/5mL. How many mL should the nurse administer? Round off to the nearest whole number. Enter numeric value only (numbers and decimal points only, no commas or labels)
Explanation
1. Identify the information given:
Prescribed dose: 80 mg of fluoxetine
Available concentration: 20 mg/5 mL
2. Determine the volume to be administered:
Set up a proportion to solve for the unknown volume (X):
20 mg/5 mL = 80 mg/X mL
Cross-multiplying gives us:
20 mg x X mL = 80 mg x 5 mL
Simplifying:
20X = 400
Solving for X:
X = 400 / 20 = 20 mL
A nurse is preparing to administer amoxicillin 2 g/day PO divided into two doses. The amount available is amoxicillin 500 mg tablets. How many tablets should the nurse administer with each dose? Round off to the nearest whole number. Enter numeric value only (numbers and decimal points only, no commas or labels)
Explanation
Identify the information given:
Prescribed dose: 2 grams of amoxicillin per day, divided into two doses.
Available concentration: 500 mg tablets
Determine the dose per administration:
Since the daily dose is divided into two doses, each dose will be: 2 g/day ÷ 2 doses/day = 1 g/dose
Determine the number of tablets per dose:
Find how many 500 mg tablets are needed to make 1 g (or 1000 mg) of amoxicillin.
Set up a proportion to solve for the unknown number of tablets (X):
500 mg/tablet = 1000 mg/X tablets
Cross-multiplying gives us:
500 mg x X tablets = 1000 mg x 1 tablet
Simplifying:
500X = 1000
Solving for X:
X = 1000 / 500 = 2 tablets
A nurse is administering a unit of RBC 300 mL over 2 hr to a client who has anemia. The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest whole number. Enter numeric value only (numbers and decimal points only, no commas or labels)
Explanation
Identify the given information:
Total volume: 300 mL
Time: 2 hours
Determine the flow rate:
Set up a proportion to solve for the unknown flow rate (X):
300 mL/2 hr = X mL/1 hr
Cross-multiplying gives us:
300 mL x 1 hr = 2 hr x X mL
Simplifying:
300 = 2X
Solving for X:
X = 300 / 2 = 150 mL/hr
A patient has an order for Carvedilol 29 mg tablets mg PO BID. The amount available is Carvedilol 7.25 mg tablets. Calculate the number of tablets the patient received? Round off to the nearest whole number. Enter numeric value only (numbers and decimal points only, no commas or labels)
Explanation
Identify the given information:
Prescribed dose: 25 mg of carvedilol per tablet
Available tablets: 7.25 mg tablets
Determine the number of tablets per dose:
Find how many 7.25 mg tablets are needed to make 25 mg of carvedilol.
Set up a proportion to solve for the unknown number of tablets (X):
7.25 mg/tablet = 25 mg/X tablets
Cross-multiplying gives us:
7.25 mg x X tablets = 25 mg x 1 tablet
Simplifying:
7.25X = 25
Solving for X:
X = 25 / 7.25 = 3.448
Round to the nearest whole number: 4 tablets of carvedilol.
A nurse is preparing to administer buspirone 75 mg PO every 12 hr to a client. The amount available is buspirone 25 mg/tablet. How many tablets should the nurse administer per dose? Do not round answer. Enter numeric value only (numbers and decimal points only, no commas or labels)
Explanation
Identify the given information:
Prescribed dose: 75 mg of buspirone per dose
Available tablets: 25 mg tablets
Determine the number of tablets per dose:
Find how many 25 mg tablets are needed to make 75 mg of buspirone.
Set up a proportion to solve for the unknown number of tablets (X):
25 mg/tablet = 75 mg/X tablets
Cross-multiplying gives us:
25 mg x X tablets = 75 mg x 1 tablet
Simplifying:
25X = 75
Solving for X:
X = 75 / 25 = 3 tablets
A nurse is preparing to administer haloperidol 15 mg IM to a client. The amount available is haloperidol 10 mg/mL. How many mL should the nurse admit Round to the nearest tenths place. Enter numeric value only (numbers and decimal points only, no commas or labels)
Explanation
Identify the information given:
Prescribed dose: 15 mg of haloperidol
Available concentration: 10 mg/mL
Determine the volume to be administered:
Set up a proportion to solve for the unknown volume (X):
10 mg/mL = 15 mg/X mL
Cross-multiplying gives us:
10 mg x X mL = 15 mg x 1 mL
Simplifying:
10X = 15
Solving for X:
X = 15 / 10 = 1.5 mL
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