Correct Answer: B

Rationale: When a client with COPD on oxygen therapy reports difficulty breathing, the priority action for the nurse is to assess the client's respiratory status. This involves evaluating the client's oxygen saturation levels, respiratory rate, effort of breathing, lung sounds, and overall respiratory distress. By assessing the client's respiratory status, the nurse can determine the severity of the situation and make appropriate decisions regarding further interventions, such as adjusting oxygen flow rate, providing respiratory treatments, or seeking emergency assistance if necessary.

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: D

Rationale: In COPD, pursed-lip breathing helps improve breathing efficiency by maintaining positive pressure in the airways, preventing airway collapse, and promoting oxygenation. This technique assists in controlling respiratory rate, reducing dyspnea, and enhancing oxygen saturation levels. Restricting fluid intake is not typically a part of COPD management. Providing a low-protein diet is not a standard intervention for COPD. Early-morning hours are generally not recommended for exercise due to cooler temperatures and higher pollution levels, which can exacerbate COPD symptoms.

Correct Answer: A

Rationale: Respiratory acidosis is a condition characterized by increased carbon dioxide levels in the blood, resulting in acidosis. One of the potential consequences of respiratory acidosis is the development of electrolyte imbalances, particularly hyperkalemia. Hyperkalemia can lead to cardiac conduction abnormalities, manifested as widened QRS complexes on an electrocardiogram (ECG). Therefore, in a client with respiratory acidosis, the healthcare professional should expect to find widened QRS complexes as a result of the associated hyperkalemia.

Correct Answer: A

Rationale: When auscultating the lungs of a client with pleurisy, the healthcare professional should expect to hear loud, scratchy sounds. These sounds are characteristic of pleurisy, which is an inflammation of the pleura, causing a rough, grating sound during breathing.