Chest physiotherapy (CPT) is ordered for a client with pneumonia. The nurse knows that the primary purpose of CPT for this client is to:

The correct answer is C: Loosen secretions in congested areas. Chest physiotherapy (CPT) involves techniques such as percussion and vibration to help mobilize and break up secretions in the lungs, making it easier for the client to cough them up. This is crucial in pneumonia as it helps to clear the airways and improve ventilation. Choice A is incorrect as CPT focuses on mobilizing secretions rather than deep inhalations. Choice B is incorrect as CPT does not directly affect ciliary movement. Choice D is incorrect as CPT does not propel oxygen but helps clear secretions to improve oxygenation.