Dynamic tracheal collapse
Updates to Article Attributes
Dynamic tracheal collapse refers to collapse of the trachea during expiration. It is perhaps best assessed on CT in the end expiratory phase. An inspiratory series is also useful for comparative purposes. The term excessive dynamic airway collapse (EDAC) refers to abnormal and exaggerated bulging of the posterior wall within the airway lumen during exhalation, and is often termed pathological if the reduced airway lumen is <50% of normal during this phase 4.
Clinical presentation
It may cause a variety of symptoms such as dyspnoea, wheeze, and exercise intolerance 3.
Pathology
Aetiology
The posterior cartilage free tracheal membrane bulges forwards excessively during expiration. It can be observed in thea number of conditions:
- tracheomalacia
- Mounier-Kuhn syndrome: background tracheal dilatation
- relapsing polychondritis: background tracheal cartilage thickening
- chronic obstructive pulmonary disease (COPD): can be observed in a subset of COPD patients 1,8
Treatment and prognosis
The prognosis depends of the severity of the condition. Varied management strategies have been proposed with some authors suggested tracheoplasty for selected cases 7.
-<p><strong>Dynamic tracheal collapse</strong> refers to collapse of the trachea during expiration. It is perhaps best assessed on CT in the end expiratory phase. An inspiratory series is also useful for comparative purposes. The term <a title="excessive dynamic airway collapse" href="/articles/excessive-dynamic-airway-collapse">excessive dynamic airway collapse</a> (EDAC) refers to abnormal and exaggerated bulging of the posterior wall within the airway lumen during exhalation, and is often termed pathological if the reduced airway lumen is <50% of normal during this phase<sup> 4</sup>.</p><h4>Clinical presentation</h4><p>It may cause a variety of symptoms such as dyspnoea, wheeze, and exercise intolerance<sup> 3</sup>.</p><h4>Pathology</h4><p>The posterior cartilage free tracheal membrane bulges forwards excessively during expiration. It can be observed in the number of conditions:</p><ul>- +<p><strong>Dynamic tracheal collapse</strong> refers to collapse of the <a title="Trachea" href="/articles/trachea">trachea</a> during expiration. It is perhaps best assessed on CT in the end expiratory phase. An inspiratory series is also useful for comparative purposes. The term <a href="/articles/excessive-dynamic-airway-collapse">excessive dynamic airway collapse</a> (EDAC) refers to abnormal and exaggerated bulging of the posterior wall within the airway lumen during exhalation, and is often termed pathological if the reduced airway lumen is <50% of normal during this phase<sup> 4</sup>.</p><h4>Clinical presentation</h4><p>It may cause a variety of symptoms such as dyspnoea, wheeze, and exercise intolerance<sup> 3</sup>.</p><h4>Pathology</h4><h5>Aetiology</h5><p><br>The posterior cartilage free tracheal membrane bulges forwards excessively during expiration. It can be observed in a number of conditions:</p><ul>
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