A client 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 mg should the nurse administer?
(Enter the numerical value only.)
The Correct Answer is ["2"]
Volume (mL) = Dose (mg) / Concentration (mg/mL)
Substituting the values, the nurse gets:
Volume (mL) = 2 mg / 2 mg/mL
Volume (mL) = 1 mL
Therefore, the nurse should administer 1 mL of the reconstituted solution to deliver 2 mg of warfarin to the client.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2.4"]
Explanation
- To find the volume of cefazolin to administer, we need to use the formula: Volume = Dose / Concentration
- First, we need to find the concentration of cefazolin after reconstitution. The label says that 1 gram of cefazolin is dissolved in 3 mL of water. To get the concentration in mg/mL, we need to multiply both the numerator and denominator by 1000: (1000 mg / 1 g) x (1 g / 3 mL) = 1000 mg / 3 mL
- Next, we need to simplify the fraction by dividing both the numerator and denominator by the greatest common factor, which is 3: (1000 mg / 3) / (3 mL / 3) = 333.33 mg/mL
- Now, we have the concentration of cefazolin in mg/mL. We can plug in the given dose of 800 mg into the formula: Volume = 800 mg / 333.33 mg/mL - Finally, we need to solve for the volume by dividing both sides by 333.33: Volume / 333.33 = (800 mg / 333.33 mg/mL) / 333.33
- The answer is 2.4 mL (rounded to the nearest tenth)
Correct Answer is ["20"]
Explanation
- Convert client's weight from pounds to kilograms: 178 / 2.2 = 80.9 kg
- Multiply client's weight by prescribed dose of diltiazem: 80.9 x 0.25 = 20.225 mg - Round the result to the nearest whole number: 20 mg
- The nurse should administer 20 mg of diltiazem IV bolus
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