MILTON B. COHEN, M.D., F.A.C.P.
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There are many classifications of bronchial asthma to be found in the literature. Their number and the difficulty in classifying many patients under them indicates the necessity for a reclassification. This should be based on (a) a knowledge of the pathology of the disease, (b) the mechanisms involved in the production of the pathologic changes and (c) the symptoms produced thereby.
As early as 18681 Hyde Salter separated bronchial asthma from other conditions which simulated it and attempted an etiological classification which is copied below.
The terms intrinsic and extrinsic as used by Salter refer to the bronchial tree. Those
COHEN MB. BRONCHIAL ASTHMA: CLASSIFICATION BASED ON ETIOLOGICAL AND PATHOLOGICAL FACTORS*. Ann Intern Med. 1944;20:590–596. doi: https://doi.org/10.7326/0003-4819-20-4-590
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Published: Ann Intern Med. 1944;20(4):590-596.
Asthma, Pulmonary/Critical Care.
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