Which of the following statements is not true regarding chronic bronchitis?
  1. it is caused by mucous hypersecretion in the bronchi and smaller airways
  2. symptoms include a productive cough and wheezing
  3. there is a decreased Reid index
  4. you would expect to find an increased PO2
Explanation
Answer: C - There is an increased Reid index seen in patients afflicted with chronic bronchitis. The Reid index measures the ratio of mucous gland thickness to bronchial wall thickness.
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