4. 1 and 3

Dyspnea is an extremely common cause of referral to a pulmonary office. The causes are extensive but often fall in the categories of deconditioning, cardiac disease and/or lung disease. An assessment of oxygen saturation after 6-8 minutes of exercise, a chest x-ray and pulmonary function tests are a good starting point (1). Dyspnea due to anxiety is mostly a diagnosis of exclusion although circumoral or extremity paresthesias can suggest the diagnosis.

Our patient’s SpO2 decreased from 94% to 87% with exercise. Her pulmonary function testing (PFTs) is shown in Figure 1.

Figure 1. Patient’s pulmonary function testing.

Which of the following are true regarding the pulmonary function testing? (Click on the corect answer to be directed to the third of eight pages)

  1. PFTs are consistent with asthma
  2. PFTs are consistent with mixed obstructive and restrictive disease
  3. PFTs are consistent with restrictive disease
  4. 1 and 3
  5. Any of the above are possible