Correct Answer: C

Rationale: Hyperoxygenating the client before and after suctioning helps prevent hypoxia by ensuring adequate oxygen levels during the procedure, which briefly interrupts the client's normal breathing pattern. Choice A is incorrect because inserting a fenestrated catheter with a whistle tip without suction would not prevent hypoxia. Choice B is incorrect as completing the suction pass in 30 seconds with a pressure of 150 mm Hg may lead to hypoxia. Choice D is incorrect as minimizing the suction pass to 60 seconds may not provide enough time for effective suctioning and could lead to hypoxia.

Correct Answer: C

Rationale: Designing and implementing a no smoking campaign aligns with the objective of reducing tobacco use, which is one of the leading health indicators of Healthy People 2020. This intervention directly targets a significant public health concern. Leading a water aerobics class, teaching cultural awareness, or providing glucometers, while beneficial in other contexts, do not specifically address the leading health indicators outlined by Healthy People 2020.

Correct Answer: A

Rationale: The correct answer is A: 'Families in their homes, School population, Workers in factories.' As a community health nurse, you are responsible for providing healthcare services and promoting health within the community. This includes visiting families in their homes to assess their health needs, working with the school population to educate them on preventive health measures, and ensuring the health and safety of workers in factories. Choices B, C, and D are incorrect because they do not encompass the full scope of a community health nurse's responsibilities. Choice B does not include workers in factories, Choice C excludes an important population group, and Choice D excludes an essential setting where healthcare services are provided.

Correct Answer: C

Rationale: The correct answer is C because wound care for a postoperative infection is a skilled service that qualifies for Medicare reimbursement. Choices A, B, and D involve assessments, teaching, and evaluation, which may not meet the criteria for Medicare reimbursement as they do not directly involve a skilled nursing service related to a postoperative condition.

Correct Answer: B

Rationale: The correct answer is to inspect the nares and ears for skin breakdown. This is important because the nasal cannula can cause skin breakdown due to prolonged use and friction. Ensuring that the skin is intact helps prevent complications. Choice A is incorrect as oxygen therapy via a nasal cannula does not involve mist. Choice C is incorrect as lubricating the tips of the cannula is not a standard practice and may lead to complications. Choice D is incorrect because while cleanliness is important, maintaining sterile technique is not necessary for handling a nasal cannula in this context.