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: 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: C

Rationale: The correct answer is C because wound care for a postoperative infection qualifies for Medicare reimbursement. Medicare typically covers skilled nursing care, like wound care, required due to a postoperative infection. Choices A, B, and D involve assessments, teaching, and evaluation, which may not always be eligible for Medicare reimbursement unless they are directly related to skilled nursing care for a specific medical condition.

Correct Answer: B

Rationale: Community health nursing primarily focuses on preventive measures and promoting overall health within a community. Choice A is incorrect as treatment is not the main emphasis. Choice C is incorrect as identification and assessment are steps that may be involved but not the main focus. Choice D is incorrect as it refers to the illness end rather than the preventive end of the wellness-illness continuum.

Correct Answer: D

Rationale: The correct first action for the nurse to take when identifying what appears to be ventricular tachycardia in a client being evaluated for possible myocardial infarction is to assess the client's airway, breathing, and circulation. This step is crucial to determine the client's stability and the need for immediate intervention. Beginning cardiopulmonary resuscitation or preparing for immediate defibrillation without first assessing the airway, breathing, and circulation could delay potentially life-saving interventions. Notifying the 'Code' team and healthcare provider should come after ensuring the client's immediate needs are addressed.