Report Interpretation
-Spirometry
RET 2414L
Pulmonary Function Testing
Module 2.1
SPIROMETRY
Severity Classification (ATS 2005)
Degree of Severity
FEV1
%Predicted
Mild
70 – 79
Moderate
60 – 69
Moderately Severe
50 – 59
Severe
35 – 49
Very Severe
<35
SPIROMETRY
Case Study 2.1
L. L. is a 21-year-old male in good health who plays
college football. His chief complaint is shortness of
breath after wind sprints and similar vigorous
exercises. L. L. denies any other symptoms,
including cough or sputum production. He has
never smoked. His grandfather had lung problems,
but their is no other history of pulmonary disease
involving the family. He states that his brothers
and sister have hay fever. There is no history of
exposure to environmental pollutants.
SPIROMETRY
Case Study 2.1
FVC (L)
FEV1 (L)
FEV1%
FEF 25%-75%
MVV (L/M)
Raw
SGaw
Predrug Pred
%Pred
Postdrug%Pred
Δ (%)
6.85
4.65
68
3.9
218
2.1
0.14
113
92
78
131
-
6.73
5.45
81
4.88
215
1.6
0.22
-2
17
6.04
5.03
84
5.0
166
0.6-2.4
0.20
111
108
97
130
-
25
-1
-24
57
SPIROMETRY
Case Study 2.2
R. Z. is a 47-year-old carpenter whose chief complaint
is shortness of breath on exertion. His dyspnea,
although worse recently, has been present for several
years. He smoked 1.5 packs of cigarettes per day for
32 years (48 pack years). He has a cough in the
morning. He says that he produces a “small amount
of grayish sputum.” R. Z.’s father had tuberculosis. A
sister had asthma as a child and now as an adult. He
denies extraordinary exposure to environmental dusts
or fumes.
SPIROMETRY
Case Study 2.2
FVC (L)
FEV1 (L)
FEV1%
FEF 25%-75%
VMax50
VMax25
MVV (L/M)
Raw
SGaw
Predrug Pred
%Pred
Postdrug%Pred
Δ (%)
4.01
2.05
51
1.2
1.35
0.55
81
3.1
0.07
78
51
33
24
21
55
-
4.49
2.20
49
1.3
2.67
1.02
97
2.9
0.11
12%
7%
-4%
8%
98%
85%
20%
-6
57%
5.15
4.03
78
3.69
5.54
2.58
146
0.6-2.4
0.20
87
55
35
30
40
67
-
SPIROMETRY
Case Study 2.3
P. W. is a 27-year-old
mechanic referred to the
pulmonary function laboratory by his private
physician. His chief complain is “breathing problems.”
He describes breathlessness that occurs suddenly and
then subsides. He has no other symptoms and no
history of lung disease. None of his immediate family
has any lung disease. He has smoked one pack of
cigarettes per day for the past 10 years (10- pack
years). He has no unusual environmental exposure.
He claims that gasoline fumes sometimes bring on the
episodes of shortness of breath.
SPIROMETRY
Case Study 2.3
Predrug
Pred
%Pred
FVC (L)
FEV1 (L)
FEV1%
FEF 25%-75%
FEF 50%
FEF 75%
MVV (L/M)
3.80
3.70
97
4.62
4.81
3.12
77
5.21
4.30
83
4.49
6.01
3.33
146
73
86
103
80
94
53
MIP
MEP
118
57
128
240
92
24