How a nurse will teach breathing exercise for a patient with chronic bronchitis?

Correct option is B

For patients with chronic bronchitis, teaching diaphragmatic (abdominal) breathing helps improve ventilation efficiency, promotes full lung expansion, and reduces the work of breathing. Explanation of each option: • (a) Use chest breathing – Chest breathing uses accessory muscles and is less efficient, especially in COPD or chronic bronchitis patients. • (b) Use diaphragmatic breathing – Correct. Encourages deeper breaths from the abdomen, improving oxygen exchange and reducing respiratory fatigue. • (c) Use open mouth breathing – May lead to dryness and ineffective ventilation; not a recommended technique for improving lung expansion. • (d) Use deep inhalation breathing – Deep breathing is helpful, but controlled diaphragmatic breathing is more effective and easier for chronic cases.