A numerical identification syterm for airways in the lung

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Abstract
A numerical sytem for identifying airways at any level in the tracheobronchial tree has been develop which appears to be simple, logical, and accurate. The system has successfully used in the author' laboratory to expedite morphometric studyes of the conduciting airways in the tracheobronchial tree. Three simpe and direct criteria or rules have been fomulated for assignment of an airway identification number (AIN) to any specific pulmonary airway, according to this identification system. Some specific applications of this AIN system have been enumerated and several limitations that the authors have recoginzed have been described. Workers in the fields of bronchial morphometry and anatomy are invited to consider the possible theoretic and practical utility of this airway identification system.