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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).
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]
Cross-sectional radiological images are important in detecting mediastinal structures involved in TM prior to surgery. Tracheography/ Bronchography is no longer a preferred diagnostic method. Bronchography provides an accurate measurement of the airway lumen with a dynamic and morphological evaluation of the tracheobronchial tree .
Laryngotracheal stenosis is an umbrella term for a wide and heterogeneous group of very rare conditions. The population incidence of adult post-intubation laryngotracheal stenosis which is the commonest benign sub-type of this condition is approximately 1 in 200,000 adults per year. [10]
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 tissue, resulting increased attenuation and a possible ground-glass appearance on CT.
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Ensuring an open airway and adequate ventilation may be difficult in people with TBI. [3] Intubation, one method to secure the airway, may be used to bypass a disruption in the airway in order to send air to the lungs. [3] If necessary, a tube can be placed into the uninjured bronchus, and a single lung can be ventilated. [3]
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