The healthcare provider prescribes cefazolin 800 mg IM every six hours. The available vial is labeled, "Cefazolin 1 gram," and the instructions for reconstitution state, "For IM use add 2.5 mL sterile water for injection to provide a total volume of 3.0 mL." After reconstitution, the solution contains how many mg/mL? (Enter numeric value only. If rounding is required, round to the nearest whole number.)
The Correct Answer is ["333"]
To find the answer, we can use the following formula:
(mg/mL) = (mg of cefazolin) / (mL of solution)
Substituting the given values, we get:
(mg/mL) = (1000) / (3)
Simplifying, we get:
(mg/mL) = 333.333
(rounded mg/mL) = 333
Therefore, after reconstitution, the solution contains 333 mg/mL of cefazolin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1"]
Explanation
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.
Correct Answer is ["168"]
Explanation
To find the answer, we can use the following steps:
- Convert the client's weight from pounds to kilograms by dividing by 2.2
- Multiply the weight in kilograms by the dosage in mg/kg
- Round the result to the nearest whole number
Using these steps, we get:
- (weight in kg) = (185) / (2.2) = 84.091 kg
- (dose in mg) = (2) x (84.091) = 168.182 mg
- (rounded dose in mg) = 168 mg
Therefore, the nurse should prepare to administer 168 mg of zidovudine IV to the client.
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