Pulmonary Function Lecture
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Questions and Answers

What is the primary purpose of measuring FEV1 in a pulmonary function test?

  • To determine the total lung capacity of a patient
  • To assess the severity of lung disease (correct)
  • To evaluate the effectiveness of bronchodilator therapy
  • To diagnose obstructive lung disease
  • What is the significance of a low FEV/FVC ratio in a pulmonary function test?

  • It is indicative of an obstructive lung disease (correct)
  • It suggests a possible diagnosis of asthma
  • It indicates a restrictive lung disease
  • It is a sign of a mild obstructive lung disease
  • What is the purpose of measuring FEF 25-75 in a pulmonary function test?

  • To evaluate the effectiveness of bronchodilator therapy
  • To determine the total lung capacity of a patient
  • To measure the small airways and detect mild obstruction or early asthma (correct)
  • To diagnose obstructive lung disease
  • What is the significance of residual volume in patients with COPD?

    <p>It increases due to air trapping, leading to a higher total lung capacity</p> Signup and view all the answers

    What is the instruction given to patients regarding short-acting inhalers before a pulmonary function test?

    <p>They should not take their medication the day of the test</p> Signup and view all the answers

    What is the primary indication of a mixed restrictive and obstructive disorder?

    <p>FVC is lower than LLN and FEV1/FVC is less than 0.7</p> Signup and view all the answers

    What is the primary purpose of a full PFT in restrictive disorders?

    <p>To measure the total lung capacity and DLCO</p> Signup and view all the answers

    What is the significance of a low DLCO in a patient with normal spirometry?

    <p>It is indicative of early interstitial lung disease</p> Signup and view all the answers

    What is the primary indication of air trapping in a patient with COPD?

    <p>RV is greater than 120% of predicted</p> Signup and view all the answers

    What is the primary purpose of a 6-minute walk test?

    <p>To measure the distance walked in 6 minutes</p> Signup and view all the answers

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