A nurse is preparing to administer regular insulin 3.5 units/hr by continuous IV infusion. Available is regular insulin 100 units in 0.45% sodium chloride 1,000 mL. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["35"]
Understanding the Problem
Order: Regular insulin 3.5 units/hr
Available Solution: Regular insulin 100 units in 1000 mL of 0.45% sodium chloride
Desired Rate: mL/hr
Step 1: Determine the Concentration of the Insulin Solution
Available Insulin: 100 units
Solution Volume: 1000 mL
Concentration: 100 units / 1000 mL = 0.1 units/mL
Step 2: Calculate the Infusion Rate in mL/hr
Ordered Dose: 3.5 units/hr
Concentration: 0.1 units/mL
Infusion Rate: 3.5 units/hr / 0.1 units/mL = 35 mL/hr
Step 3: Round to the Nearest Whole Number
The calculated rate is 35 mL/hr, which is already a whole number.
Answer: 35 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2"]
Explanation
Understanding the Problem
Order: Propranolol 240 mg/day PO in two divided doses
Available: Propranolol 60 mg tablets
Desired Dose: Number of tablets per dose
Step 1: Calculate the Dose per Administration
Total Daily Dose: 240 mg
Number of Doses: 2
Dose per Administration: 240 mg / 2 doses = 120 mg/dose
Step 2: Calculate the Number of Tablets per Dose
Dose per Administration: 120 mg
Tablet Strength: 60 mg/tablet
Number of Tablets: 120 mg / 60 mg/tablet = 2 tablets
Step 3: Round to the Nearest Whole Number
The calculated number of tablets is 2, which is already a whole number.
Answer: 2 tablets
Correct Answer is ["30"]
Explanation
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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