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 ["2"]
Explanation
To find the answer, we can use the following steps:
- Calculate the number of tablets needed to provide the prescribed dose of amoxicillin by dividing the dose in mg by the amount of amoxicillin in one tablet
- Calculate the number of tablets needed to provide the prescribed dose of clavulanate by dividing the dose in mg by the amount of clavulanate in one tablet
- Compare the two numbers and choose the larger one as the number of tablets to be administered
Using these steps, we get:
- (number of tablets for amoxicillin) = (2000) / (1000) = 2
- (number of tablets for clavulanate) = (125) / (62.5) = 2
- (number of tablets to be administered) = max(2, 2) = 2
Therefore, the nurse should administer 2 tablets of amoxicillin/clavulanate to the client.
Correct Answer is ["15"]
Explanation
To find the answer, we can use the following steps:
- Calculate the infusion rate in mL/hour by dividing the volume of IV fluids by the time of infusion
- Calculate the infusion rate in mL/minute by dividing the infusion rate in mL/hour by 60
- Multiply the infusion rate in mL/minute by the drop factor in gtt/mL to get the infusion rate in gtt/minute
- Round the result to the nearest whole number
Using these steps, we get:
- (infusion rate in mL/hour) = (630) / (7) = 90 mL/hour
- (infusion rate in mL/minute) = (90) / (60) = 1.5 mL/minute
- (infusion rate in gtt/minute) = (1.5) x (10) = 15 gtt/minute
- (rounded infusion rate in gtt/minute) = 15
Therefore, the nurse should regulate the infusion to deliver 15 gtt/minute of IV fluids to the client.
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