Airflow Obstruction case

Question 1

What are the likely findings in peak flow and spirometry before and after BD

Answer 1

FER, FEV1, FVC
-all low, no change after BD => fixed obstruction

TLC, RV
-normal, no hyperinflation

TLCO
-normal, no issues with the diffusion surface

Question 2

What are the possible findings during the general examination?

Answer 2

Inspiratory, expiratory monophonic wheeze => some obstruction

Question 3

What are the possible findings on an ABG

Answer 3

Likely to be hypoxic but not in resp failure

Question 4

What could the blockage be caused by

How would you confirm this

Answer 4

Something compressing a large airway
-carcinoma of trachea

CXR and CT