Correct Answer: D

Rationale: Postoperative atelectasis can lead to hypoxia, which causes respiratory distress. Intercostal retractions, where the muscles between the ribs pull inward during inspiration, are a common sign of respiratory distress in a client with atelectasis. Bradycardia (slow heart rate), Bradypnea (slow breathing rate), and lethargy are not typically associated with atelectasis and hypoxia.

Correct Answer: C

Rationale: Confusion is a common manifestation of pneumonia in older adults. It can result from inadequate oxygenation to the brain due to respiratory compromise. Bradycardia, night sweats, and narrowed pulse pressure are not typically specific findings associated with pneumonia and should be further assessed or monitored, but confusion is a key indicator that warrants immediate attention.

Correct Answer: A

Rationale: In cardiogenic pulmonary edema, the priority intervention is to improve oxygenation and reduce the workload on the heart. Providing supplemental oxygen at 5 L/min via facemask helps increase oxygen levels and alleviate respiratory distress. This intervention can help improve oxygen saturation, alleviate dyspnea, and support the client's respiratory function. Placing the client in a high-Fowler's position with legs dependent can also help with respiratory effort, but ensuring adequate oxygenation takes precedence. Sublingual nitroglycerin and IV morphine sulfate are commonly used interventions for cardiac-related conditions, but in this case, addressing oxygenation is the priority to prevent further deterioration.

Correct Answer: B

Rationale: In acute respiratory failure, the body is not getting enough oxygen, leading to hypoxia. Symptoms of hypoxia include severe dyspnea (A), decreased level of consciousness (C), and headache (D) due to inadequate oxygen supply to the brain. Nausea (B) is not a typical manifestation of acute respiratory failure and is not directly related to the lack of oxygen in the body. Therefore, the nurse should not monitor the client for nausea as a direct consequence of ARF.

Correct Answer: C

Rationale: Viral pharyngitis is typically caused by a virus, not bacteria, so a negative throat culture is an expected finding. The presence of petechiae on the chest and abdomen (Choice A) is not a common manifestation of viral pharyngitis. Elevated WBC count (Choice B) is more indicative of a bacterial infection rather than a viral one. Severe hyperemia of the pharyngeal mucosa (Choice D) is a possible finding in pharyngitis but is not specific to viral pharyngitis.