Which statement indicates that the nurse understands what the half-life of a drug means?
Drugs with a short half-life have a greater risk for toxicity
Half-life is not affected by renal or hepatic function
if a medication has a long half-life. dosage times can be longer intervals & the drug remains effective
Half of the effective portion of the drug is metabolized by the liver
The Correct Answer is C
C. The half-life of a drug refers to the time it takes for the concentration of the drug in the bloodstream to be reduced by half. If a medication has a long half-life, it means that it stays in the body for a longer period before being eliminated. This allows for less frequent dosing intervals while still maintaining therapeutic effectiveness.
A. Drugs with a short half-life are typically cleared from the body more quickly. While they may require more frequent dosing to maintain therapeutic levels, they do not necessarily have a greater risk for toxicity compared to drugs with longer half-lives. In fact, drugs with longer half-lives can accumulate in the body over time, potentially increasing the risk of toxicity.
B. The half-life of a drug can be significantly influenced by renal (kidney) and hepatic (liver) function. Impaired renal or hepatic function can prolong the half-life of a drug, leading to slower elimination and potentially increased risk of adverse effects.
D. This statement describes the concept of drug metabolism rather than the half-life. Drug metabolism refers to the biochemical alteration of drugs by enzymes, often occurring in the liver. The half-life, on the other hand, specifically relates to the elimination of the drug from the body.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
B Leaning away from the client can convey disinterest, distraction, or a lack of engagement. It creates physical distance and may inhibit the client from feeling heard or valued. Thus, leaning away from the client can be a barrier to active listening as it diminishes the nurse's ability to fully attend to and understand the client's message.
A. An open posture, where the nurse's body is facing the client with arms uncrossed and relaxed, signals openness and receptivity. It encourages communication and shows the client that the nurse is engaged and attentive. Therefore, an open posture promotes active listening rather than serving as a barrier.
C. Eye contact is essential for effective communication and active listening. It demonstrates attentiveness, interest, and respect. Establishing eye contact helps the nurse to connect with the client and encourages them to continue sharing their thoughts and feelings. Therefore, eye contact supports active listening rather than hindering it.
D. Sitting squarely facing the client promotes engagement and shows that the nurse is focused on the client. It facilitates direct communication and helps the nurse to observe the client's nonverbal cues effectively. This posture encourages open dialogue and supports active listening rather than acting as a barrier.
Correct Answer is D
Explanation
D. Metabolic alkalosis is characterized by an increased pH (alkalosis) and an increased HCO3. In this case, the pH is elevated (7.5), indicating alkalosis, which supports metabolic alkalosis. The HCO3 is elevated at 40 mEq/L, which further supports metabolic alkalosis. The PaCO2 is normal or slightly low (36 mmHg), which can occur as a compensatory response to metabolic alkalosis.
A. Respiratory alkalosis is characterized by an increase in pH (alkalosis) and a decrease in PaCO2 (hypocapnia). In this scenario, the pH is elevated (7.5), which indicates alkalosis. The PaCO2 is 36 mmHg, which is within the normal range (35-45 mmHg) but slightly on the lower side (slight hypocapnia). The HCO3 is elevated at 40 mEq/L, which suggests a compensatory response by the kidneys to retain bicarbonate to counteract the alkalosis.
B. Respiratory acidosis is characterized by a decrease in pH (acidosis) and an increase in PaCO2 (hypercapnia). In this case, the pH is elevated (7.5), indicating alkalosis, which contradicts respiratory acidosis. The PaCO2 is 36 mmHg, which is normal or slightly low, not high as expected in respiratory acidosis. The elevated HCO3 (40 mEq/L) suggests a compensatory metabolic response to the alkalosis, not to acidosis.
C. Metabolic acidosis is characterized by a decreased pH (acidosis) and a decreased HCO3. In this scenario, the pH is elevated (7.5), indicating alkalosis, which contradicts metabolic acidosis. The HCO3 is elevated at 40 mEq/L, indicating metabolic alkalosis rather than metabolic acidosis.
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