Barclay's sign
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Classically, clinical examination of an emphysematic patient reveals no overt crackles, however, in some patients the fine opening of airway 'popping' (dissimilar to the fine crackles of pulmonary fibrosis or coarse crackles of mucinous or oedematous fluid) can be auscultated. This is known as Barclay's sign.