Q:

A 15 year old boy presents with recurrent breathlessness and wheeze especially after exercise. What is the most diagnostic investigation?

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A 15 year old boy presents with recurrent breathlessness and wheeze especially after exercise. What is the most diagnostic investigation?


  1. CXR
  2. Lung function test
  3. PEFR
  4. CT scan

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The key is B. Lung function test. [Assessment of severity of airflow obstruction can diagnose asthma and COPD].

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