A nurse is caring for a child who has cystic fibrosis and requires postural drainage. Which of the following actions should the nurse take?

A. Administer a bronchodilator after the procedure: Bronchodilators are usually administered before postural drainage and percussion to open the airways, enhance mucus clearance, and reduce bronchospasm. Administering afterward would not optimize airway clearance. B. Perform the procedure prior to meals: Performing postural drainage before meals helps prevent nausea and vomiting, which can occur if the stomach is full. This timing also enhances comfort and safety during chest physiotherapy for children with cystic fibrosis. C. Perform the procedure twice each day: Children with cystic fibrosis often require more frequent airway clearance, sometimes three to four times daily, depending on clinical status. Limiting it to twice daily may be insufficient to prevent mucus accumulation. D. Hold hand flat to perform percussions on the child: Percussions should be performed with cupped hands, not flat hands, to create a vibration that loosens mucus in the airways. Flat-hand technique is ineffective and does not facilitate optimal airway clearance.