Chronic obstructive pulmonary disease laboratory findings: Difference between revisions
Created page with "{{Chronic obstructive pulmonary disease}} {{CMG}}; Philip Marcus, M.D., M.P.H. [mailto:pmarcus192@aol.com]; {{AOEIC}} {{CZ}} ==Overview== Chronic obstructive pulmonary disea..." |
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==Laboratory Tests== | ==Laboratory Tests== | ||
COPD is particularly | COPD is particularly characterized if a ratio of forced expiratory volume over 1 second ([[FEV1|FEV<sub>1</sub>]]) to forced vital capacity (FVC) being < 0.7 and the [[FEV1|FEV<sub>1</sub>]] < 70% of the predicted value when compared with a matched control. <ref>[http://www.patient.co.uk/showdoc/40002357/ PatientPlus - Spirometry]</ref> (see [[Spirometry]]). | ||
The severity of COPD can be classified as follows using spirometry (see above): | The severity of COPD can be classified as follows using spirometry (see above): | ||
Revision as of 20:37, 5 March 2012
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Chronic obstructive pulmonary disease Microchapters |
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Differentiating Chronic obstructive pulmonary disease from other Diseases |
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Diagnosis |
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Treatment |
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Case Studies |
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Chronic obstructive pulmonary disease laboratory findings On the Web |
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American Roentgen Ray Society Images of Chronic obstructive pulmonary disease laboratory findings |
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FDA on Chronic obstructive pulmonary disease laboratory findings |
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CDC on Chronic obstructive pulmonary disease laboratory findings |
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Chronic obstructive pulmonary disease laboratory findings in the news |
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Blogs on Chronic obstructive pulmonary disease laboratory findings |
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Directions to Hospitals Treating Chronic obstructive pulmonary disease |
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Risk calculators and risk factors for Chronic obstructive pulmonary disease laboratory findings |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Philip Marcus, M.D., M.P.H. [2]; Associate Editor(s)-In-Chief: Cafer Zorkun, M.D., Ph.D. [3]
Overview
Chronic obstructive pulmonary disease can be diagnostically evaluated through laboratory testing to determine the pulmonary impact.
Laboratory Tests
COPD is particularly characterized if a ratio of forced expiratory volume over 1 second (FEV1) to forced vital capacity (FVC) being < 0.7 and the FEV1 < 70% of the predicted value when compared with a matched control. [1] (see Spirometry).
The severity of COPD can be classified as follows using spirometry (see above):
| Severity | Post-bronchodilator FEV1 /FVC | FEV1 % predicted |
|---|---|---|
| At risk | >0.7 | ≥80 |
| Mild COPD | ≤0.7 | ≥80 |
| Moderate COPD | ≤0.7 | 50-80 |
| Severe COPD | ≤0.7 | 30-50 |
| Very Severe COPD | ≤0.7 | <30 or 30-50 with Chronic Respiratory Failure symptoms |