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. Respiratory rate is important because opioid-induced respiratory depression is a significant concern with hydromorphone. Assessing the respiratory rate helps the nurse detect early signs of respiratory depression.
B. Pain scale is essential to evaluate the effectiveness of the equianalgesic dose. The nurse should ensure that the pain is adequately controlled with the IV dose comparable to what was achieved with the PO dose.
C. Blood pressure is monitored to detect any potential hypotensive effects of hydromorphone, particularly with IV administration.
D. Level of consciousness is assessed to ensure that the client is not overly sedated or experiencing other neurological side effects of the medication.
Correct Answer is {"A":{"answers":"B"},"B":{"answers":"A"},"C":{"answers":"B"},"D":{"answers":"A"},"E":{"answers":"B"},"F":{"answers":"A"},"G":{"answers":"B"}}
Explanation
At risk of hypovolemia
D. Total blood loss of 800 mL
A total blood loss of 800 mL indicates significant hemorrhage, which puts the client at risk for hypovolemia (low blood volume). While exact definitions may vary, typically, blood loss exceeding 500 mL postpartum is considered significant and increases the risk of hypovolemia if not managed appropriately.
F. 200 mL blood loss
While 200 mL of blood loss is within the normal range for immediate postpartum period, it still represents a loss of blood that, if ongoing, could potentially lead to hypovolemia if not monitored closely.
Condition has improved
A. Fundus massaged until firm and at umbilicus
Massaging the fundus until it is firm and at the umbilicus helps ensure uterine contraction, which reduces the risk of excessive bleeding and promotes hemostasis. This indicates that uterine tone is adequate, which is a positive sign.
C. Straight catheter produced 500 mL clear yellow urine
The passage of 500 mL of clear yellow urine indicates adequate renal perfusion and hydration status, suggesting that the client's fluid balance is being maintained or improved, which is important in preventing hypovolemia.
E. Blood pressure of 110/80 mm Hg, heart rate of 66 beats/minute, oxygen saturation at 98% on room air
Stable vital signs with normal blood pressure, heart rate, and oxygen saturation indicate adequate perfusion and oxygenation. This suggests that the client's condition is stable and not immediately at risk for hypovolemia.
G. Fundus remains firm with slight lochia noted on pad
A firm fundus with slight lochia (postpartum vaginal discharge) indicates ongoing normal involution (shrinking) of the uterus with minimal bleeding. This suggests that the client's uterus is contracting well, which is favorable for preventing hypovolemia.
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