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Chest, Vol 85, 777-781, Copyright © 1984 by American College of Chest Physicians

ARTICLES

Evaluation of bronchial air leaks by auscultation and phonopneumography

PE Krumpe, J Hadley and RA Marcum

Bronchial fistulae in communication with atmospheric pressure can be identified by the presence of a squeaking sound heard over the chest wall during a Valsalva maneuver. Furthermore, these leak sounds can help identify the size, location, and communications of the bronchial fistulae. The size of the leak can be inferred by the pitch of the leak sound. Large leaks produce low pitched sounds, smaller leaks (or partially obstructed leaks) produce high pitched squeaks , and multiple leaking sites produce polyphonic leak squeaks . The bronchus responsible for the leak can be identified by cessation of the leak sound during balloon occlusion of the correct bronchial stump. A communication of a bronchial fistula with the chest wall facial plane produces massive subcutaneous emphysema and an early inspiratory click. This click suggests a check valve mechanism of air exiting the leaking bronchus.


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