A nurse is preparing to administer diltiazem IV 0.25 mg/kg V bolus given over 2 min to client who has atrial fibrillation and weighs 154 lb. Available is diltiazem IV injection 25 mg/S mL. How many mL should the nurse administer? Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["3.5"]
Understanding the Problem
Order: Diltiazem 0.25 mg/kg IV bolus over 2 minutes
Client Weight: 154 lbs
Available Solution: Diltiazem IV injection 25 mg/5 mL
Desired Dose: mL to administer
Step 1: Convert Client Weight to Kilograms (kg)
1 kg = 2.2 lbs
Client Weight in kg: 154 lbs / 2.2 lbs/kg = 70 kg
Step 2: Calculate the Total Dose
Ordered Dose: 0.25 mg/kg
Client Weight: 70 kg
Total Dose: 0.25 mg/kg * 70 kg = 17.5 mg
Step 3: Determine the Concentration of the Diltiazem Solution
Available Diltiazem: 25 mg
Solution Volume: 5 mL
Concentration: 25 mg / 5 mL = 5 mg/mL
Step 4: Calculate the Volume to Administer
Total Dose: 17.5 mg
Concentration: 5 mg/mL
Volume: 17.5 mg / 5 mg/mL = 3.5 mL
Step 5: Round to the Nearest Tenth
The calculated volume is 3.5 mL, which is already to the nearest tenth.
Answer: 3.5 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["167"]
Explanation
Understanding the Problem
Volume: 250 mL of 0.9% sodium chloride
Infusion Time: 90 minutes
Desired Rate: mL/hr
Step 1: Convert Infusion Time to Hours
Minutes in an Hour: 60 minutes
Infusion Time in Hours: 90 minutes / 60 minutes/hour = 1.5 hours
Step 2: Calculate the Infusion Rate in mL/hr
Volume: 250 mL
Infusion Time: 1.5 hours
Infusion Rate: 250 mL / 1.5 hours = 166.666... mL/hr
Step 3: Round to the Nearest Whole Number
The calculated rate is 166.666... mL/hr.
Rounded to the nearest whole number: 167 mL/hr
Answer: 167 mL/hr
Correct Answer is ["6.5"]
Explanation
Convert the Client's Weight from Pounds to Kilograms:
1 kg = 2.205 lbs
Weight in kg = 143 lbs / 2.205 lbs/kg
Weight in kg ≈ 64.85 kg
Calculate the Total Dose of Cyclosporine Needed:
Dose = 5 mg/kg x 64.85 kg
Dose ≈ 324.25 mg
Calculate the Volume of Cyclosporine to Administer:
Available concentration = 50 mg/mL
Volume (mL) = Desired dose (mg) / Available concentration (mg/mL)
Volume (mL) = 324.25 mg / 50 mg/mL
Volume (mL) ≈ 6.485 mL
Round to the Nearest Tenth:
6.5 mL
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