What is the time required to change the amount of a drug in plasma by half during elimination?

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Chapter 14 Drugs for the Reproductive System Questions

Question 1 of 5

What is the time required to change the amount of a drug in plasma by half during elimination?

Correct Answer: C

Rationale: The correct answer is C: Half-life (t1/2). Half-life is the time required for the concentration of a drug in plasma to decrease by half during elimination. It is a measure of how quickly a drug is removed from the body. It is independent of dose or concentration. Absorption time (A) is the time it takes for a drug to enter the bloodstream. Metabolic time (B) refers to the time it takes for a drug to be metabolized in the body. Clearance time (D) is the time it takes for the body to clear a certain amount of drug from the plasma, but it does not specifically indicate the time required for half of the drug to be eliminated.

Question 2 of 5

Which assessment finding is most concerning when examining a client in preterm labor who is receiving magnesium sulfate?

Correct Answer: C

Rationale: The correct answer is C: Loss of patellar reflexes. This is concerning when examining a client in preterm labor receiving magnesium sulfate due to the risk of magnesium toxicity, which can lead to respiratory depression and cardiac arrest. Loss of patellar reflexes indicates excessive magnesium levels affecting neuromuscular function. Options A and B are common side effects of magnesium sulfate administration. Option D, positive clonus, may also be seen with magnesium toxicity but is not as specific or critical as loss of patellar reflexes in this context.

Question 3 of 5

A client is to receive 10 mg nalbuphine by slow intravenous push for pain relief during labor. During which phase of uterine contractions will the nurse plan to administer nalbuphine?

Correct Answer: C

Rationale: The correct answer is C: Between uterine contractions. Administering nalbuphine during contractions can lead to decreased uterine blood flow, potentially compromising fetal oxygenation. Waiting until between contractions allows for optimal fetal oxygenation and minimizes the risk of uterine hyperstimulation. Administering at the end of a contraction or at any time during a contraction may still pose risks to the fetus.

Question 4 of 5

A client has an epidural for pain control during labor. During the assessment, the nurse notes a drop in the client's blood pressure. Which priority nursing intervention would the nurse do?

Correct Answer: B

Rationale: The correct answer is B: Turn her on her left side. Rationale: 1. Turning the client on her left side promotes blood flow to the placenta, increasing perfusion to the fetus. 2. This position helps alleviate hypotension by preventing compression of the vena cava. 3. It is a non-invasive and immediate intervention to address the drop in blood pressure. Summary: A: Administering low-flow oxygen is not the priority in this case as hypotension is likely due to epidural-induced vasodilation, not hypoxia. C: Assessing urinary output is important but not the immediate priority when addressing a drop in blood pressure. D: Monitoring vaginal bleeding is not relevant to the drop in blood pressure related to epidural administration.

Question 5 of 5

It is mandatory to have maternal signed consent before administering which newborn drug?

Correct Answer: C

Rationale: Step 1: Maternal consent is required for Hepatitis B vaccine series as it involves administering a vaccine to the newborn, which may have potential risks. Step 2: The Hepatitis B vaccine series is given as a preventive measure against Hepatitis B infection. Step 3: Maternal consent ensures that the mother is informed about the benefits and risks of the vaccine for her newborn. Step 4: Without maternal consent, healthcare providers cannot administer the Hepatitis B vaccine series to the newborn. Summary: Choice A (Erythromycin eye ointment) is typically administered routinely without requiring maternal consent. Choice B (Phytonadione) is a vitamin supplement given to newborns to prevent bleeding disorders, usually without the need for maternal consent. Choice D (Betamethasone injection) is a medication given to pregnant women to help fetal lung development and does not require maternal consent for administration to the newborn.

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