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A nurse is preparing to administer potassium glucose 40 mEq PO. Available is potassium gluconate liquid 20 mEq/15 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Answer and Explanation

The Correct Answer is ["30"]

Understanding the Problem

Order: Potassium gluconate 40 mEq PO

Available Solution: Potassium gluconate liquid 20 mEq/15 mL

Desired Dose: mL to administer

 

Step 1: Set Up the Calculation

We need to find the volume (in mL) that contains the ordered dose (40 mEq). We can do this by setting up a proportion or using the formula:

Volume (mL) = (Ordered Dose (mEq) / Concentration (mEq/mL))

 

Step 2: Determine the Concentration

Available Concentration: 20 mEq / 15 mL

 

Step 3: Perform the Calculation

Ordered Dose: 40 mEq

Concentration: 20 mEq / 15 mL

Volume: (40 mEq) / (20 mEq / 15 mL) = (40 mEq X 15 mL) / 20 mEq

 

We can simplify this by dividing 40 by 20:

Volume: (2 X 15 mL) = 30 mL

 

Step 4: Round to the Nearest Whole Number

The result is 30 mL, which is already a whole number.

 

Answer: 30 mL


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Related Questions

Correct Answer is ["3"]

Explanation

Understanding the Problem

Order: Metoclopramide 15 mg IV

Available Solution: Metoclopramide 5 mg/mL

Desired Dose: mL to administer

Step 1: Set Up the Calculation

We need to find the volume (in mL) that contains the ordered dose (15 mg). We can do this by dividing the ordered dose by the concentration of the available solution:

Volume (mL) = Ordered Dose (mg) / Concentration (mg/mL)

Step 2: Perform the Calculation

Ordered Dose: 15 mg

Concentration: 5 mg/mL

Volume: 15 mg / 5 mg/mL = 3 mL

Step 3: Round to the Nearest Whole Number

The result is 3 mL, which is already a whole number.

Answer: 3 mL

Correct Answer is ["60"]

Explanation

Understanding the Problem

Order: Lidocaine 4 mg/min

Available Solution: Lidocaine 1 g in 250 mL of D5W

Desired Rate: mL/hr

Step 1: Convert Grams (g) to Milligrams (mg)

1 g = 1000 mg

Available Lidocaine: 1 g x 1000 mg/g = 1000 mg

Step 2: Determine the Concentration of the Lidocaine Solution

Available Lidocaine: 1000 mg

Solution Volume: 250 mL

Concentration: 1000 mg / 250 mL = 4 mg/mL

Step 3: Calculate the Infusion Rate in mL/min

Ordered Dose: 4 mg/min

Concentration: 4 mg/mL

Infusion Rate: 4 mg/min / 4 mg/mL = 1 mL/min

Step 4: Convert Infusion Rate to mL/hr

Infusion Rate: 1 mL/min

Minutes in an Hour: 60 min

Infusion Rate in mL/hr: 1 mL/min x 60 min/hr = 60 mL/hr

Step 5: Round to the Nearest Whole Number

The calculated rate is 60 mL/hr, which is already a whole number.

Final Answer: 60 mL/hr

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