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 ["A","B","D"]
Explanation
A. This is the part of the IV administration set that pierces the IV bag or bottle to allow fluid to flow into the tubing. The plastic insertion spike must remain sterile because it comes into direct contact with the fluid within the IV container. Contamination of the spike could introduce microorganisms into the IV solution.
B. The catheter adapter or hub is the part of the IV administration set where the IV catheter or cannula connects. It is crucial for this part to remain sterile to prevent introducing pathogens into the bloodstream during catheter insertion or manipulation.
D. The Y-site injection port is a branching point in the IV tubing where additional medications or fluids can be infused into the IV line. It must remain sterile to prevent contamination when administering medications or secondary infusions.
C. The drip chamber is located in the IV tubing, just below the IV bag or bottle. It is designed to visualize and regulate the flow of IV fluid into the patient. It does not directly contact the bloodstream or the IV fluid inside the tubing.
E. Roller clamp to regulate flow (Option E) does not necessarily need to be sterile because it does not come into direct contact with IV fluid or the patient's bloodstream. However, it should be handled with clean hands to maintain general cleanliness and to prevent contamination of other sterile parts of the IV set.
Correct Answer is ["A","B","E"]
Explanation
A. This is located on the lateral side of the thigh. It is a commonly used site for infants, toddlers, and young children, as well as adults who require large-volume injections.
B. This site is located on the hip or gluteal region. It is considered one of the safest and least painful sites for intramuscular injections in adults. It is also used when the volume of medication is larger or when the dorsogluteal site is contraindicated.
E. This site is located on the upper arm, specifically the lateral aspect. It is commonly used for vaccines and medications that require smaller volumes in adults and older children.
C. There is no specific muscle called the "rectus lateralis." It seems to be a combination of the rectus femoris (a muscle in the quadriceps group of the thigh) and the vastus lateralis. However, neither "rectus lateralis" nor "rectus femoris" is commonly used as a distinct injection site in clinical practice.
D. This site is located on the buttocks. Historically, it was a commonly used site for intramuscular injections, but it has fallen out of favor due to the potential risk of injury to the sciatic nerve and superior gluteal artery.
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