Correct Answer: A

Rationale: The correct answer is A. Effective oxygen therapy should improve the client's ability to perform activities without dyspnea. This indicates that the oxygen therapy is adequately supporting the client's respiratory needs. An oxygen saturation of 92% may suggest the need for a higher flow rate to improve oxygenation. A respiratory rate of 24 breaths per minute is elevated, indicating potential respiratory distress. A productive cough does not necessarily indicate effective oxygen therapy, as it is a symptom of respiratory irritation or infection, not oxygenation status.

Correct Answer: C

Rationale: After a bronchoscopy, a topical anesthetic affects the gag reflex. Therefore, the nurse should assess the client's gag reflex before providing any food or water to ensure its return. This assessment is crucial to prevent aspiration or choking risk in the client.

Correct Answer: B

Rationale: In this scenario, the nurse should determine if the client can safely switch to a nasal cannula during meals. It is crucial to ensure that the provider has approved this change. Oxygen is considered a medication and should be delivered continuously. Turning off the oxygen or lifting the mask while eating can lead to a decrease in the FiO2 delivered, potentially compromising the client's oxygenation status. Therefore, the best course of action is to ascertain if transitioning to a nasal cannula is appropriate for the client during the meal.

Correct Answer: C

Rationale: In pneumonia, lung tissue consolidation occurs, leading to dullness on percussion. This is a typical finding in pneumonia. Fremitus and decreased tactile fremitus are more commonly associated with conditions like pleural effusion or pneumothorax. Hyperresonance is typically seen in conditions causing air trapping, such as emphysema.

Correct Answer: B

Rationale: A respiratory rate of 10 breaths per minute in a client with COPD receiving oxygen therapy may indicate respiratory depression, necessitating immediate intervention. An oxygen saturation of 91%, client reports of shortness of breath, and use of accessory muscles are expected in COPD clients.