A nurse administering medications has many responsibilities. Among these responsibilities is a knowledge of pharmacokinetics. Which statement is the best description of pharmacokinetics?
The degree to which medications bind to serum proteins, which affects distribution.
The method by which a medication, after absorption, is moved within the body to tissues, organs, and specific sites of action.
The passage of medication molecules into the blood from the site of administration.
The study of how medications enter the body, reach their site of action, are metabolized, and exit the body.
The Correct Answer is D
Rationale:
A. This describes protein binding, which is one factor affecting drug distribution, but it is not the full definition of pharmacokinetics.
B. This describes distribution, which is one phase of pharmacokinetics.
C. This describes absorption, which is another phase of pharmacokinetics.
D. Pharmacokinetics is the study of how medications enter the body, move to their site of action, are metabolized, and are eliminated. It encompasses absorption, distribution, metabolism, and excretion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["C","D"]
Explanation
Rationale:
A. Skin turgor and capillary refill within normal limits indicate adequate hydration, not fluid excess.
B. Decreased urine output and dry mucous membranes are signs of fluid volume deficit, not excess.
C. Shortness of breath and crackles in the lungs occur due to pulmonary congestion from fluid overload and should be reported.
D. Elevated blood pressure and edema are classic signs of fluid volume excess caused by increased circulating volume and fluid shift into tissues.
Correct Answer is A
Explanation
Rationale:
A. Tracheal suctioning is the most appropriate intervention for a patient with a tracheostomy and thick, tenacious secretions. It directly clears the airway through the tracheostomy tube.
B. Nasotracheal suctioning is used for patients without a tracheostomy to access the lower airway through the nasal passage.
C. Orotracheal suctioning is also intended for patients without a tracheostomy and is more invasive.
D. Oropharyngeal suctioning clears secretions from the mouth and throat only, not the trachea, and is insufficient for maintaining a tracheostomy airway.
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