A client with multiple sclerosis (MS) is receiving interferon beta-1b 0.1875 mg subcutaneously every other day. The nurse reconstitutes the vial by slowly injecting 1.2 mL of diluent into the interferon vial for a reconstituted solution of 0.25 mg/1 mL. How many mL should the nurse administer?
(Enter numeric value only. If rounding is required, round to the nearest hundredth.)
The Correct Answer is ["0.75"]
Calculate the volume of the reconstituted solution that contains the prescribed dose of 0.1875 mg. Since the reconstituted solution has a concentration of 0.25 mg per 1 mL, we can set up a proportion to find the answer: (0.1875 mg / X mL) = (0.25 mg / 1 mL).
Solving for X gives us X = (0.1875 mg * 1 mL) / 0.25 mg, which equals 0.75 mL.
Therefore, the nurse should administer 0.75 mL of the reconstituted solution.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Rationale
A. Diarrhea and flatulence are common gastrointestinal side effects of statin medications like lovastatin. While uncomfortable for the client, these symptoms are typically not serious and do not require immediate follow-up unless severe or persistent.
B. Muscle pain, also known as myalgia, is a potential side effect of statin therapy. In some cases, statins can cause muscle inflammation (myositis) or more severe muscle breakdown (rhabdomyolysis), which can lead to serious complications such as kidney damage. If a client reports new or worsening muscle pain, especially if accompanied by weakness, tenderness, or dark urine, it requires immediate follow-up to assess for these potential complications.
C. Abdominal cramps can occur as a gastrointestinal side effect of statins but are generally not considered a serious adverse reaction. They may improve with time or adjustments in diet or medication administration timing.
D. Altered taste, such as a metallic taste, is a less common side effect of statin therapy. While it can be bothersome, it is usually not serious and does not typically require immediate follow-up unless severe or persistent.
Correct Answer is ["21"]
Explanation
To calculate the flow rate in gtt/min, you can use the formula: (Volume in mL * Drop factor) / Time in
minutes.
For 1 L of lactated Ringer's IV, which is 1000 mL, to be infused over 12 hours, with an IV administration set that delivers 15 gtt/mL, the calculation would be: (1000 mL * 15 gtt/mL) / (12 hours * 60 minutes/hour).
This simplifies to (15000 gtt) / (720 minutes), which equals approximately 20.83 gtt/min.
Therefore, the nurse should regulate the infusion to 21 gtt/min, rounding to the nearest whole
number.
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