A nurse is preparing a child who has cystic fibrosis for chest physiotherapy. Which of the following times is appropriate for the nurse to administer bronchodilator therapy in relation to chest physiotherapy?

A. Immediately after is incorrect. Administering bronchodilators immediately after chest physiotherapy is not ideal. The purpose of chest physiotherapy is to help loosen mucus, and bronchodilators should be given before to open the airways and improve mucus clearance. B. 2 hrs before is incorrect. Giving bronchodilators 2 hours before chest physiotherapy is too far in advance. The optimal time for bronchodilator therapy is immediately before chest physiotherapy to maximize the effectiveness of both interventions. C. Immediately before is correct. Bronchodilator therapy should be administered immediately before chest physiotherapy to open the airways and allow for more effective clearance of mucus. This timing helps to improve lung function and respiratory effort during physiotherapy. D. 2 hrs after is incorrect. Administering bronchodilators 2 hours after chest physiotherapy would not be effective, as the airways would have already been manipulated and the benefits of the bronchodilator would be diminished.