Correct Answer: A

Rationale: Bradycardia (abnormally slow heart rate) is a key sign of digoxin toxicity. In this scenario, the child's symptoms of irritability, vomiting, along with the resting pulse of 78 despite being on digoxin, suggest an impending bradycardia due to digoxin toxicity. Lethargy can also be a sign, but in this case, the child is irritable rather than lethargic. Vomiting, though a symptom, is not as specific to digoxin toxicity as bradycardia. Irritability, while present, is not the most indicative finding of digoxin toxicity compared to bradycardia.

Correct Answer: B

Rationale: In situations where a client is trembling and fearful upon admission to a psychiatric unit, it is essential to prioritize building trust and reducing anxiety. By introducing oneself and accompanying the client to their room, the nurse can establish a therapeutic relationship, provide a sense of security, and address the client's immediate emotional needs. Choices A, C, and D are not the most appropriate initial responses as they do not directly address the client's emotional state or focus on establishing a supportive relationship.

Correct Answer: D

Rationale: Correct! Documentation of client education in the nursing record is the most appropriate data source for conducting a process evaluation of a prevention education program. This documentation provides insight into the educational process, its implementation, and the quality of education delivered. Choices A and B focus on assessing the clients directly for substance abuse, which is different from evaluating the educational process. Choice C, the most recent community census data, is not directly related to evaluating the specific prevention education program for older adults at risk for substance abuse.

Correct Answer: C

Rationale: The correct answer is C: Measles, mumps, rubella (MMR). MMR vaccine is commonly included in precollege physicals to ensure students are protected against these diseases. Choice A, Hepatitis C (HepC), is incorrect as the standard vaccine for hepatitis given in childhood is Hepatitis B. Choice B, Influenza type B (HIB), is not typically administered during precollege physicals but is recommended for younger children. Choice D, Diphtheria, tetanus, pertussis (DTaP), is usually given in early childhood and not typically repeated during precollege physicals.

Correct Answer: B

Rationale: Fasting for at least 12 hours is necessary before a cholesterol and triglyceride test to ensure accurate results by avoiding fluctuations that can occur after eating. Choice A is incorrect because a fat-free diet is not required; fasting is. Choice C is incorrect as it suggests having the test right after eating, which can affect the results. Choice D is incorrect as there is no need to stay at the laboratory for 2 blood samples unless specifically instructed by a healthcare provider.