Pulmonary Function Testing
Case 3
A 60 year-old man presents to his primary care provider with complaints of increasing dyspnea on exertion. He has a 40 pack-year history of smoking and is retired following a career as a building contractor.
His pulmonary function testing is as follows:
| Pre-Bronchodilator (BD) | Post- BD | ||||
|---|---|---|---|---|---|
| Test | Actual | Predicted | % Predicted | Actual | % Change |
| FVC (L) | 1.89 | 4.58 | 41 | 3.69 | 96 |
| FEV1 (L) | 0.89 | 3.60 | 25 | 1.89 | 112 |
| FEV1/FVC (%) | 47 | 79 | |||
| RV (L) | 5.72 | 2.31 | 248 | ||
| TLC (L) | 7.51 | 6.41 | 117 | ||
| RV/TLC (%) | 76 | 37 | |||
| DLCO* corr | 20.73 | 33.43 | 62 | ||
| *DLCO is measured in ml/min/mmHg | |||||
| Check abbreviations>> | |||||
His flow volume loops is as follows:
Describe the pattern of abnormality, if one is present.
Grade the severity of the abnormality.
Generate a differential diagnosis for the observed abnormality.
Top of PageUW School of Medicine : School of Medicine Mission
Copyright and Disclaimer : Credits and Acknowledgements