solved

Abbreviations:
FVC Forced Vital Capacity
FEV1 Forced Expiratory Volume in One Second
TLC Total Lung Capacity
DLCO Diffusion Capacity for Carbon Monoxide
Interpret the PFTs
Case 1
A 65-year-old man undergoes pulmonary function testing as part of a routine health-screening test. He had no pulmonary complaints. He is a lifelong nonsmoker and had a prior history of asbestos exposure while serving in the Navy.
His pulmonary function test results are as follows:
Pre-Bronchodilator Response
Post- Bronchodilator
Response
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
TLC (L)
6.86
6.09
113 %
DLCO
84
%
What is your diagnosis?
Case 2
A 23-year-old woman presents to your practice with dyspnea, cough and wheezing, especially during allergy season. She is a non-smoker with no relevant occupational exposures.
Pre-Bronchodilator Response Post- Bronchodilator Response
Test
Actual
Predicted
% Predicted
% Change
FVC (L)
3.19
4.22 76 % +25
FEV1 (L)
2.18
3.39 64 % +30
FEV1/FVC (%)
68 %
80 %
4
+4
DLCO
86%
What is your diagnosis?
Case 3
A 65-year-old man presents to your practice with dyspnea, especially with exertion and a cough. He is a 40 pack per year smoker with no relevant occupational exposures.
Pre-Bronchodilator Response Post- Bronchodilator Response
Test
Actual
Predicted
% Predicted
% Change
FVC (L)
2.25
3.75 60 % +2
FEV1 (L)
1.1
3.0 36% +3
FEV1/FVC (%)
49 %
80 %
4
+1
DLCO
40%

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