A client receives a prescription for warfarin sodium 2 mg IM daily. The pharmacy delivers a vial labeled, "Warfarin sodium 5 mg/single-use vial. The instructions read, "Reconstitute with 2.7 mL of sterile water for injection to yield 2 mg/mL. How many mL should the nurse administer? (Enter the numerical value only.)
The Correct Answer is ["1"]
Desired dose = 2 mg
Available concentration after reconstitution = 2 mg/mL
Calculate the volume to administer:
Volume to administer (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 2 mg / 2 mg/mL
= 1 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["125"]
Explanation
Total volume to be infused = 250 mL
Infusion time in hours = 2 hours
Calculate the infusion rate in mL per hour:
Infusion rate (mL/hour) = Total volume (mL) / Infusion time (hours)
= 250 mL / 2 hours
= 125 mL/hour
Correct Answer is ["1250"]
Explanation
Convert the child's weight from pounds to kilograms:
Weight (kg) = Weight (pounds) / 2.2 pounds/kg
= 55 pounds / 2.2 pounds/kg
= 25 kg
Calculate the total daily dose in milligrams:
Total daily dose (mg) = Prescribed dose (mg/kg/24 hours) x Child's weight (kg)
= 300 mg/kg/24 hours x 25 kg
= 7500 mg/24 hours
Determine the number of doses per day:
Number of doses per day = 24 hours / Frequency of doses (hours)
= 24 hours / 4 hours/dose
= 6 doses/day
Calculate the dose to administer for each dose:
Dose per administration (mg) = Total daily dose (mg) / Number of doses per day
= 7500 mg / 6 doses
= 1250 mg/dose
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