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Respiratory Disorders (Expert Forum)
Spirometry Results and Yearly Changes
Answered by
David Tinkelman, M.D. - Respiratory Disorder
National Jewish Health
CO
This forum is for questions and support regarding lung and respiratory issues such as: Allergies, Asthma, Bronchitis, Colds - Flu, Chronic Cough, COPD, Cystic Fibrosis, Emphysema, Fibrosis, Lung Abscess, Nasal Polyps, Pleurisy, Pneumonia, Sarcoidosis, Sinusitis, Tuberculosis.
Spirometry Results and Yearly Changes
by vancouverasking, Oct 02, 2009 04:26PM
Hello;
I am hoping that you may able to provide some information/interpretation regarding relatively normal spirometry results and lower than normal FEF 25-75% results. I am a 47 years old, smoked for 12 pack years, and quit smoking 15 years ago. There was a slight (6%) increase after the broncial challenge test. I had a very slight cold/allergy when completing the test. Last year when it was completed by FEV1/FVC was 98% and FEF25-75% was 82% ( at a different lab). Also,would there be an explanation for this decline within 1 year? My Mother and Uncle both have COPD which was diagnosed in their late 60's.
FVC - 115%
FEV1 - 98%
FEV1/FVC - 84% (will this decrease over time?)
FEF25-75% - 56%
PEF - 125
Lung Volumes
VC - 120%
TLC - 110%
FRC PL - 103%
RV - 97%
RV/TLC -30
Diffusion
DLCO - 95%
DLCO/VA - 85%
I am very concerned. Thanks in advance.
Michele
I am hoping that you may able to provide some information/interpretation regarding relatively normal spirometry results and lower than normal FEF 25-75% results. I am a 47 years old, smoked for 12 pack years, and quit smoking 15 years ago. There was a slight (6%) increase after the broncial challenge test. I had a very slight cold/allergy when completing the test. Last year when it was completed by FEV1/FVC was 98% and FEF25-75% was 82% ( at a different lab). Also,would there be an explanation for this decline within 1 year? My Mother and Uncle both have COPD which was diagnosed in their late 60's.
FVC - 115%
FEV1 - 98%
FEV1/FVC - 84% (will this decrease over time?)
FEF25-75% - 56%
PEF - 125
Lung Volumes
VC - 120%
TLC - 110%
FRC PL - 103%
RV - 97%
RV/TLC -30
Diffusion
DLCO - 95%
DLCO/VA - 85%
I am very concerned. Thanks in advance.
Michele
Doctor's Answer
by David Tinkelman, M.D., Oct 05, 2009 04:52PM
, Oct 05, 2009 04:52PMTo: vancouverasking
The FEV1/FVC ratio slowly decreases with aging and 84% is probably within normal limits. The difference, 84% vs 98% could be on the basis of different laboratories. Your current spirometric values are, with the exceptions of the FEF25-75% and the PEF, are WNL and that includes your lung volues, the RV/TLC and the diffusing capacity. That the FEF25-75% and PEF are reduced in the presence of a normal FEV1 suggests that the reduced values are a reflection of less than optimum effort. Given your other normal values, I would place very little significance on the FEF25-75% (historically deemed by some to be a sign of small airway disease). These findings do not suggest, even early, COPD. You should request a copy of the PFT interpretation but, in the meantime, you have no reason to be concerned about your lungs.
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