Correct Answer: B

Rationale: PCA allows patients to self-administer pain medication within prescribed limits, without the need to call the nurse before taking an additional dose. Choice B suggests a misunderstanding of how PCA works, as the patient should be educated that they can self-administer doses within the safety parameters set by the healthcare provider. Choices A, C, and D demonstrate proper understanding of PCA, hence are not indicative of needing further teaching.

Correct Answer: C

Rationale: The correct answer is C: health promotion. Health promotion activities involve maintaining a healthy lifestyle to prevent illness. In this scenario, the person is actively engaging in behaviors that promote their overall health and well-being, such as walking and following a healthy diet. Choice A, 'health balance,' is vague and does not specifically address the proactive nature of the person's actions. Choice B, 'disease prevention,' while related, focuses more on specific actions taken to prevent diseases rather than the broader concept of promoting overall health. Choice D, 'self-fulfillment,' does not directly relate to the activities described in the question.

Correct Answer: B

Rationale: The continuum health model emphasizes ongoing health practices based on past behaviors. Choice A is incorrect as it describes a more binary approach to health. Choice C is incorrect as it focuses on alternative therapies rather than the continuity of health practices.

Correct Answer: B

Rationale: Retinopathy of prematurity is the most common complication in premature infants exposed to high concentrations of oxygen. This condition leads to abnormal blood vessel growth in the retina, which can potentially result in blindness if not managed promptly. Intraventricular hemorrhage, though a significant concern in premature infants, is not directly related to oxygen therapy. Bronchopulmonary dysplasia is primarily associated with mechanical ventilation and oxygen exposure over time, not specifically with oxygen concentration monitoring. Necrotizing enterocolitis is more linked to gastrointestinal issues and is not the most common complication of oxygen therapy in premature newborns.

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.