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Old 10-12-2012
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Lungs Asthma with 90% FEV1

A questions describes typical history of exercise induced asthma in a girl with family history of asthma in the family. PFT they rite the ratio to be 90% and FEV1 to be 90% and the diagnosis was asthma. But sudnt the ratio be leas than 90% since its an obstructive disease??
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Old 10-12-2012
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Old 10-12-2012
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Quote:
Originally Posted by firstaid150 View Post
A questions describes typical history of excersice induced asthma in a girl wid family history of asthma in the family. PFT they rite the ratio to be 90% and FEV1 to be 90% and the diagnosis was asthma. But sudnt the ratio be leas than 90% since its an obstrictive disease??
That is correct. By definition the PFT is normal in exercise-induced asthma.

Also, remember, Asthma is a reversible airway disease.

Quote:
Objective testing should begin with spirometry at rest. In true exercise-induced asthma, the results should be within normal limits. Should resting values be abnormal, then asthma, or some other chronic lung condition, is present. There is, of course, no reason why asthma and exercise-induced asthma should not co-exist but the distinction is important because without successful treatment of underlying asthma, treatment of an exercise component will be futile. If baseline testing is normal, some form of exercise stress will required, either on the sideline or practice venue, or in the laboratory.
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In addition, it is important to distinguish those who have asthma with exercise worsening, and who consequently will have abnormal testing at rest, from true exercise-induced asthma, where there will be normal, baseline, results.
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