A nurse is preparing to administer lidocaine 3 mg/min by continuous IV infusion to a client who has a ventricular arrhythmia. Available is lidocaine 2 g in dextrose 5% in water 250 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 ["23"]
Calculation:
Calculate the total amount of lidocaine in milligrams:
Available lidocaine: 2 g
Conversion: 2 g × 1000 mg/g = 2000 mg
Determine the concentration of the lidocaine solution in milligrams per milliliter:
Total lidocaine: 2000 mg
Total volume of solution: 250 mL
Formula: Concentration (mg/mL) = Total milligrams / Total mL
= 2000 mg / 250 mL
= 8 mg/mL
Calculate the desired dose of lidocaine per hour in milligrams:
Ordered dose: 3 mg/min
Conversion: 3 mg/min × 60 min/hr = 180 mg/hr
Calculate the IV pump flow rate in mL/hr:
Formula: Flow rate (mL/hr) = Desired dose per hour (mg/hr) / Concentration (mg/mL)
= 180 mg/hr / 8 mg/mL
= 22.5 mL/hr
Round the answer to the nearest whole number:
22.5 mL/hr rounded to the nearest whole number is 23 mL/hr.
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Related Questions
Correct Answer is ["60"]
Explanation
Calculation:
Calculate the total amount of lidocaine in milligrams:
Available lidocaine: 1 g
Conversion: 1 g × 1000 mg/g = 1000 mg
Determine the concentration of the lidocaine solution in milligrams per milliliter:
Total lidocaine: 1000 mg
Total volume of solution: 250 mL
Formula: Concentration (mg/mL) = Total milligrams / Total mL
= 1000 mg / 250 mL
= 4 mg/mL
Calculate the desired dose of lidocaine per hour in milligrams:
Ordered dose: 4 mg/min
Conversion: 4 mg/min × 60 min/hr = 240 mg/hr
Calculate the IV pump flow rate in mL/hr:
Formula: Flow rate (mL/hr) = Desired dose per hour (mg/hr) / Concentration (mg/mL)
= 240 mg/hr / 4 mg/mL
= 60 mL/hr
Correct Answer is A
Explanation
A. The medication can be used for IV administration: The label clearly states that the medication is for intramuscular or intravenous use only. This means the medication is indeed suitable for IV administration.
B. The medication can be used for up to 14 days after reconstitution: The label specifically mentions that the reconstituted medication should be used within 48 hours. This is less than 14 days.
C. The medication should be reconstituted with 0.9% sodium chloride solution: The label specifies that the medication should be reconstituted with bacteriostatic water for injection, not 0.9% sodium chloride solution.
D. The vial contains a single dose: The label indicates that this is a multiple dose vial, meaning it contains more than one dose.
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