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Tracheobronchomalacia may also occur in people who have normal cartilaginous structure of the trachea, but significant atrophy of the posterior wall, causing significant invagination of the trachea on expiration. In these cases it is more commonly known as excessive dynamic airway collapse (EDAC).
The most common symptom of laryngotracheal stenosis is gradually-worsening breathlessness particularly when undertaking physical activities (exertional dyspnea).The patient may also experience added respiratory sounds which in the more severe cases can be identified as stridor but in many cases can be readily mistaken for wheeze.
In people with TBI, bronchoscopy may reveal that the airway is torn, or that the airways are blocked by blood, or that a bronchus has collapsed, obscuring more distal (lower) bronchi from view. [3] Chest x-ray is the initial imaging technique used to diagnose TBI. [17] The film may not have any signs in an otherwise asymptomatic patient. [15]
Dynamic compression of the airways results when intrapleural pressure equals or exceeds alveolar pressure, which causes dynamic collapsing of the lung airways. It is termed dynamic given the transpulmonary pressure (alveolar pressure − intrapleural pressure) varies based on factors including lung volume, compliance, resistance, existing pathologies, etc. [1]
Bronchography provides an accurate measurement of the airway lumen with a dynamic and morphological evaluation of the tracheobronchial tree. However, this requires the injection of contrast material within the narrowed airway. Risks include allergic reaction, airway plugging, or complete airway obstruction. [5]
Upon expiration there is less air in the lungs, leading to a relative increase in density of the tissue, and thus increased attenuation on CT. Furthermore, when a patient lays supine for a CT scan, the posterior lungs are in a dependent position, causing partial collapse of the posterior alveoli. This leads to an increase in density of the ...
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Until 2017, Dynamic Airways was owned as follows, [20] Kenneth M. Woolley (50%) - founder and chief information officer (and former CEO) of Extra Space Storage . Woolley also co-owns Swift Air , another Part 121 carrier, in association with Swift Transportation , and is the owner of KMW Leasing, an aircraft leasing firm.