PFT TMC exam style example and explination

A patient’s pulmonary function results are:

%of predicted

  • SVC 61
  • FVC     63
  • FEV1 83
  • FEV1/FVC% 81
  • DLCO 26

What is most likely this patient’s condition?

  1. Chronic Bronchitis
  2. Asthma
  3. The patient doesn’t have a restrictive or obstructive condition
  4. Pulmonary fibrosis

The correct answer is 4- pulmonary fibrosis

The first thing we want to look at is the FEV1/FVC% and FEV1, both are normal so there is no obstructive disorder. An abnormal FEV1/FVC% is<70, an abnormal FEV1 is below 80.

After we look a the FEV1FVC% and FEV1 look at the SVC and FVC, both are low indicating a restrictive disorder. The only restrictive disorder that is an option is pulmonary fibrosis.

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