Final answer:
Performing pulmonary hygiene every 2 hours helps decrease the growth of micro-organisms and development of pneumonia by promoting airway clearance.
Step-by-step explanation:
Performing pulmonary hygiene every 2 hours can decrease the growth of micro-organisms and development of pneumonia for an immobile client by promoting airway clearance. Pulmonary hygiene techniques such as deep breathing exercises, coughing, and suctioning help to remove mucus and secretions from the airways, preventing stagnation and the proliferation of bacteria. By maintaining a clear airway, the risk of infection and pneumonia is reduced.