A new video has been posted of an examination revealing upper airway collapse (aka, tracheomalacia) causing a sound similar to the bark of a seal. Patient had this peculiar breathing sound only on exhalation (especially with coughing) even though he did not feel sick or have trouble breathing. Notably, the patient did not get correctly diagnosed for over 5 years during which he was unsuccessfully treated for asthma, allergy, and vocal cord dysfunction.
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