A patient receives a prescription for warfarin 2 mg IM daily. The pharmacy delivers a vial labeled, warfarin 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"]
First, we need to find out how many mg of warfarin are in one vial. Since the vial is labeled 5 mg/single-use, we can assume that it contains 5 mg of warfarin.
Next, we need to find out how many mL of solution are in one vial. Since the instructions say to reconstitute with 2.7 mL of sterile water for injection to yield 2 mg/mL, we can use the following formula:
Amount of solution= amount of water + amount of warfarin
Substituting the given values, we get:
Amount of solution = 2.7 + 5 =7.7 mL
Now, we need to find out how many mL of solution contain 2 mg of warfarin, which is the prescribed dose for the patient. We can use the following formula:
mL of solution = mg of warfarin/ concentration of warfarin
Substituting the given values, we get:
mL of solution = 2/2 = 1 mL
Therefore, the nurse should administer 1 mL of solution to the patient.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["10"]
Explanation
To find the answer, we can use the following steps:
- Convert the child's weight from pounds to kilograms by dividing by 2.2
- Calculate the volume of amoxicillin suspension in mL by dividing the dose in mg by the concentration in mg/mL
- Round the result to the nearest whole number
Using these steps, we get:
- (weight in kg) = (88) / (2.2) = 40 kg
- (volume in mL) = (500) / (250 / 5) = 10 mL
- (rounded volume in mL) = 10 mL
Therefore, the nurse should administer 10 mL of amoxicillin suspension to the child.
Correct Answer is ["15"]
Explanation
To find the answer, we can use the following steps:
- Convert the child's weight from pounds to kilograms by dividing by 2.2
- Calculate the total daily dose of amoxicillin in mg by multiplying the weight in kg by the dosage in mg/kg/day
- Divide the total daily dose of amoxicillin in mg by the number of doses per day to get the dose per administration
- Divide the dose per administration in mg by the concentration of amoxicillin in mg/mL
- Round the result to the nearest whole number
Using these steps, we get:
- (weight in kg) = (66) / (2.2) = 30 kg
- (total daily dose in mg) = (80) x (30) = 2400 mg
- (dose per administration in mg) = (2400) / (2) = 1200 mg
- (volume per administration in mL) = (1200) / (400 / 5) = 15 mL
- (rounded volume per administration in mL) = 15 mL
Therefore, the nurse should administer 15 mL of amoxicillin oral suspension with each dose.
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