Pulmonary Function Testing
Case 1
A 65 year-old man undergoes pulmonary function testing as part of a routine health-screening test. He has no pulmonary complaints. He is a lifelong non-smoker and had a prior history of asbestos exposure while serving in the Navy. His pulmonary function test results are as follows:
| Pre-Bronchodilator (BD) | Post- BD | |||
|---|---|---|---|---|
| Test | Actual | Predicted | % Predicted | % Change |
| FVC (L) | 4.39 | 4.32 | 102 | -1 |
| FEV1 (L) | 3.20 | 3.37 | 95 | 7 |
| FEV1/FVC (%) | 73 | 78 | 8 | |
| FRC (L) | 3.17 | 3.25 | 98 | |
| ERV (L) | 0.63 | 0.93 | 68 | |
| RV (L) | 2.54 | 2.32 | 109 | |
| TLC (L) | 6.86 | 6.09 | 113 | |
| DLCO* uncorr | 25.69 | 31.28 | 82 | |
| DLCO corr | 26.14 | 31.28 | 84 | |
| *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.
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