Asthma laboratory findings
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Lakshmi Gopalakrishnan, M.B.B.S. [2]
Overview
Routine laboratory tests are not indicated for the diagnosis of asthma. However, a complete blood count with differential may reveal an elevated eosinophil greater than 15%. Serum IgE levels or allergen-specific IgE using radioallergosorbent tests (RAST) may be indicated in patients with a repeated history of allergic triggers.