A patient is to have peak and trough levels drawn for a particular drug. The nurse explains to the patient that these drug blood levels are important to:
determine the amount of protein binding of the drug.
determine if the blood concentration is at a level to produce beneficial effects.
measure the distribution of the drug throughout the body.
measure the first pass effect.
The Correct Answer is B
A. determine the amount of protein binding of the drug: Protein binding affects the drug’s activity and distribution, but peak and trough levels specifically measure blood concentration, not protein binding.
B. determine if the blood concentration is at a level to produce beneficial effects: Peak and trough levels are used to ensure the drug concentration stays within a therapeutic range—high enough to be effective but low enough to avoid toxicity. This monitoring is crucial for drugs with narrow therapeutic windows.
C. measure the distribution of the drug throughout the body: Drug distribution refers to how a drug spreads to tissues and organs, which is not directly assessed by peak and trough blood levels.
D. measure the first pass effect: The first pass effect relates to drug metabolism by the liver before reaching systemic circulation, which is not evaluated by peak and trough drug level measurements.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Receptive aphasia: Involves difficulty understanding spoken or written language. Individuals with this condition may speak fluently but their responses may be inappropriate due to misinterpretation of what is being said to them.
B. Expressive aphasia: Characterized by difficulty expressing thoughts through speech or writing, even though comprehension remains intact. In this case, the patient understands the question but cannot verbalize the response indicating a challenge with verbal expression.
C. Dysphagia: Refers to difficulty swallowing and is unrelated to language processing or speech production. It does not affect a person's ability to communicate their needs.
D. Global aphasia: A severe form of aphasia involving both receptive and expressive language deficits. Individuals with global aphasia typically have very limited ability to speak or understand language.
Correct Answer is B,D,A,C
Explanation
A. Subcutaneous: Medications administered subcutaneously are absorbed more slowly than intramuscular or intravenous routes due to less vascularity in subcutaneous tissue. However, absorption is still faster than enteral routes.
B. Intravenous: The IV route delivers medication directly into the bloodstream, offering immediate absorption and rapid onset of action. It is the fastest route and preferred in emergencies or when precise control is needed.
C. Enteral: Medications taken orally or via feeding tubes (enteral route) must pass through the digestive system. This results in the slowest absorption due to factors like gastric emptying, food interactions, and first-pass metabolism in the liver.
D. Intramuscular: Intramuscular injections offer faster absorption than subcutaneous due to the rich blood supply in muscle tissue. This route is often used for medications needing moderate speed and prolonged effect.
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