--- **Patient details:** - Age: ** - Gender: ** - Smoking status: ** - BMI: ** --- **Respiratory function tests** ![[Case AE RFTs 1.png]] >[!example]- Flow-volume loop >![[O-FC.png|center]] > [!question]- Describe the findings of these respiratory function tests > - The FER is less than 0.70, consistent with the presence of an **obstructive ventilatory defect**. > - The FEV1 is 1.30L (50% predicted), consistent with a moderate-severe obstructive ventilatory defect (*ATS/ERS 2005*). > - The FVC is reduced at 2.20L (66%), which in the context of an obstruction, may represent gas trapping or true restriction. Static lung volumes could be performed to evaluate this further. > - There is **no** acute bronchodilator response. > - Diffusion capacity is moderately reduced (50% pred), and remains low despite correction for alveolar volume (KCO 51% pred), suggestive of pulmonary parenchymal and/or pulmonary vascular disease. > - **Summary:** Respiratory function tests demonstrate a moderate-severe obstructive ventilatory defect with a reduced FVC, which in this context may represent associated gas trapping or true restriction but requires static lung volumes to confirm. There is no bronchodilator response. Diffusion capacity is reduced, and does not correct for alveolar volume, suggestive of underlying pulmonary parenchymal and/or vascular disease. > - **These results are/are not consistent with my provisional diagnosis of (XYZ)** >[!info] Scroll down for chest imaging when ready --- **Chest imaging** *** ![[Case AE - Imaging.jpg]] >[!example]- Please comment on the relevant findings of this *** >[!info] Scroll down for discussion when ready --- **Discussion questions** > [!question]- Question 1 > Answer 1 **References:** 1.