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.

Correct Answer: C

Rationale: Pursed-lip breathing is a common manifestation in clients with emphysema. It helps to increase the duration of exhalation and reduce air trapping, aiding in the management of the condition. Decreased chest expansion and bradypnea are not typically associated with emphysema. While cyanosis can occur in severe cases, pursed-lip breathing is a more specific and commonly observed sign of emphysema.

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: A

Rationale: There is a drug-food interaction between statins and grapefruit that can lead to acute kidney failure. The client has elevated renal laboratory results, indicating kidney involvement. The nurse should ask if the client consumes grapefruit or grapefruit juice. While dehydration can elevate BUN, the increase in creatinine is more specific for kidney injury.

Correct Answer: B

Rationale: Immediate intervention is necessary when a client with a mediastinal chest tube exhibits tracheal deviation since it may indicate a tension pneumothorax. This condition requires prompt attention to prevent serious complications. While the production of pink sputum and pain at the insertion site should be monitored and reported, they do not typically require immediate intervention. Sudden onset of shortness of breath could indicate various issues related to the chest tube but is not as critical as tracheal deviation in this context.