A 33-year-old woman comes to the office due to worsening exertional dyspnea. She previously jogged frequently but now becomes short of breath while walking her dog in the park. She has no other significant medical history and takes no medications. She smokes a pack of cigarettes daily and does not use alcohol or illicit drugs. Blood pressure is 124/76 mm Hg, pulse is 78/min, and respirations are 20/min. BMI is 27 kg/m2. Cardiac examination is unremarkable. Laboratory studies reveal markedly decreased serum alpha-1 antitrypsin levels. Which of the following pulmonary function test patterns (total lung capacity; FEV1/FVC ratio; diffusing capacity for carbon monoxide [DLCO]) is most likely to be present in this patient?
Select any text to highlight it or add a note — your annotations stay with the question.
Select an answer to reveal the correct choice and explanation.Tip: press A–E to answer.