Ati dosage calculation mce proctored fall 2024

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Question 1: View

A nurse is preparing to administer potassium chloride 20 mEq suspension PO daily. The amount available is potassium chloride suspension 10 mEq/mL How many mL should the nurse administer? (Round the answer to the nearest tenth/whole number. Use a leading zero if it applies. Do not use a trailingzero

Explanation

Step 1: Set up the calculation.
You need to determine how many mL of the available solution will provide the ordered 20 mEq.
Use the formula:
Volume to administer=Desired dose / Concentration
Where:
• Desired dose = 20 mEq
• Concentration = 10 mEq/mL

Step 2: Plug in the values and calculate.
Volume to administer=20 mEq / 10 mEq/mL

Volume to administer=2 mL

Question 2: View

A nurse is preparing to administer 1 mg vitamin K to a newborn. The medication is available in 1 mg/0.5 mL. How much should the nurse administer? (Round to the nearest tenth. Use a leading zero when applicable. Do not use a trailing zero.)

Explanation

Step 1: Set up the calculation.
You need to determine how many mL of the available solution will provide the ordered 1 mg.
Use the formula:
Volume to administer=Desired dose / Concentration
Where:
• Desired dose = 1 mg
• Concentration = 1 mg/0.5 mL

Step 2: Plug in the values and calculate.
Volume to administer=1 mg / 1 mg/0.5 mL

Volume to administer=0.5 mL

Step 3: Round the answer.
In this case, the calculation gives an exact value, so no rounding is necessary.

Question 3: View

A nurse is caring for a client who has diabetes and a new prescription for 14 units of regular insulin and 28 units of NPH insulin subcutaneously at breakfast daily. What is the total number of units that the nurse should prepare in the insulin syringe?

A. 42 units B. 28 units C. 14 units D. 32 units

Explanation

A) 42 units: To calculate the total number of insulin units to prepare, add the units of regular insulin to the units of NPH insulin. The client requires 14 units of regular insulin and 28 units of NPH insulin. Adding these together yields a total of 42 units. This total reflects the sum of both types of insulin that need to be administered to meet the prescribed dosage.

B) 28 units: This option only accounts for the NPH insulin dose and does not include the regular insulin dose. To ensure the client receives the full prescribed dosage, both the regular insulin and the NPH insulin must be considered. Therefore, 28 units alone is not sufficient for the complete dosage required.

C) 14 units: This value represents only the amount of regular insulin required. It does not account for the additional 28 units of NPH insulin needed. The total preparation must include both the regular and NPH insulin, so 14 units alone does not meet the full prescription.

D) 32 units: This amount does not accurately reflect the total units required. It is neither the sum of the regular and NPH insulin doses nor any standard calculation derived from the prescribed doses. Thus, 32 units is incorrect for the total amount needed for the insulin syringe.

Question 4: View

A nurse is providing discharge teaching to the parent of a child who is prescribed diphenhydramine 25 mg elixir every 4 hr as needed. The amount available is diphenhydramine elixir 12.5 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Explanation

Step 1: Determine the ratio of milligrams per millilitre from the available elixir.

The available elixir is labelled "12.5 mg/5 mL." This means that for every 5 mL of the solution, there are 12.5 milligrams of diphenhydramine.

Step 2: Calculate the number of millilitres needed for 25 milligrams.

We can set up a proportion to solve for the unknown number of millilitres:

(12.5 mg) / (5 mL) = (25 mg) / (x mL)

Cross-multiplying:

12.5 mg x x mL = 5 mL x 25 mg

Step 3: Solve for x (the number of millilitres).

Divide both sides of the equation by 12.5 mg:

x mL = (5 mL x 25 mg) / (12.5 mg)

x mL = 10 mL

Question 5: View

A nurse is preparing to administer desipramine 150 mg PO daily to a client to treat diabetic neuropathy. The amount available is desipramine 100 mg/tablet. How many tablets should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Explanation

Step 1: Determine the ratio of milligrams per tablet from the available tablets.

The available tablets are labelled "100 mg/tablet." This means that for every 1 tablet, there are 100 milligrams of desipramine.

Step 2: Calculate the number of tablets needed for 150 milligrams.

We can set up a proportion to solve for the unknown number of tablets:

(100 mg) / (1 tablet) = (150 mg) / (x tablets)

Cross-multiplying:

100 mg x x tablets = 1 tablet x 150 mg

Step 3: Solve for x (the number of tablets).

Divide both sides of the equation by 100 mg:

x tablets = (1 tablet x 150 mg) / (100 mg)

x tablets = 1.5 tablets

Question 6: View

A nurse is preparing an in-service program about preventing medication errors when transcribing a prescription. The nurse is using a dosage example of two tenths of a milligram. Which of the following examples should the nurse use to show appropriate transcription of this dosage?

A. 0.20 mg B. 2.0 mg C. .2 mg D. 0.2 mg E. None F. None

Explanation

A) 0.20 mg: Although this representation of two-tenths of a milligram is correct, the trailing zero (the "0" after the decimal) is not typically necessary and can potentially lead to confusion. Standard practice generally omits trailing zeros to prevent errors in medication administration.

B) 2.0 mg: This represents two milligrams, not two-tenths of a milligram. The magnitude of the dose is significantly different from what is intended, making this option incorrect for representing two-tenths of a milligram.

C) .2 mg: This format lacks a leading zero before the decimal point, which can lead to misinterpretation or errors. The absence of the leading zero may cause confusion, especially in situations where decimal points are misread.

D) 0.2 mg: This is the most appropriate and clear way to write two-tenths of a milligram. It includes the leading zero before the decimal point, which helps to avoid confusion and accurately communicates the dose. This format adheres to standard practices for dosing precision and clarity.

Question 7: View

A provider prescribes dextrose 5% in water IV to infuse at 100 mL/hr. The drop factor on the manual IV tubing Is 60 gtt/mL. The nurse should set the IV flow rate to deliver how many gtt/min, (Round the answer to the nearest whole number.)

Explanation

To calculate the flow rate in drops per minute (gtt/min), we can use the following formula:

Flow rate (gtt/min) = (Volume (mL/hr) x Drop factor (gtt/mL)) / 60 minutes/hour

Substituting the given values:

Flow rate (gtt/min) = (100 mL/hr x 60 gtt/mL) / 60 minutes/hour
Flow rate (gtt/min) = 6000 gtt/hr / 60 minutes/hr

Flow rate (gtt/min) = 100 gtt/min

Question 8: View

A nurse is preparing to administer chlordiazepoxide 50 mg PO every 8 hr to a client. The amount available is chlordiazepoxide 25 mg/capsule. How many capsules should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Explanation

To calculate the correct dosage, let's use the following steps:

Step 1: Determine the ratio of milligrams per capsule from the available capsules.

The available capsules are labelled "25 mg/capsule." This means that for every 1 capsule, there are 25 milligrams of chlordiazepoxide.

Step 2: Calculate the number of capsules needed for 50 milligrams.

We can set up a proportion to solve for the unknown number of capsules:

(25 mg) / (1 capsule) = (50 mg) / (x capsules)

Cross-multiplying:

25 mg x x capsules = 1 capsule x 50 mg

Step 3: Solve for x (the number of capsules).

Divide both sides of the equation by 25 mg:

x capsules = (1 capsule x 50 mg) / (25 mg)

x capsules = 2 capsules

Question 9: View

A nurse is preparing to administer valproic acid 400 tog PO bid for migraine headaches. Available is valproic acid 250 mg/5mL. How many ml should the nurse administer per dose, (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Explanation

Step 1: Determine the ratio of milligrams per millilitre from the available valproic acid.
The available valproic acid is labelled "250 mg/5 mL." This means that for every 5 mL of the solution, there are 250 milligrams of valproic acid.

Step 2: Calculate the number of millilitres needed for 400 milligrams.
We can set up a proportion to solve for the unknown number of millilitres:

(250 mg) / (5 mL) = (400 mg) / (x mL)
Cross-multiplying:
250 mg * x mL = 5 mL * 400 mg

Step 3: Solve for x (the number of millilitres).
Divide both sides of the equation by 250 mg:

x mL = (5 mL * 400 mg) / (250 mg)
x mL = 8 mL

Question 10: View

A nurse is caring for a 1-month-old infant who weighs 3500g and is prescribed a dose of cephazolin 50 mg/kg by intermittent IV bolus three times daily. How many mg should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do 3 m anot use a trailing zero.)

Explanation

Step 1: Convert the weight of the infant from grams to kilograms.

1 kilogram = 1000 grams

So, 3500 grams = 3500/1000 = 3.5 kilograms

Step 2: Calculate the dosage based on the infant's weight and the prescribed dose.

Dosage = Weight (kg) x Prescribed dose (mg/kg)

Dosage = 3.5 kg x 50 mg/kg

Dosage = 175 mg

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