Dynamic tracheal collapse

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.

It may cause a variety of symptoms such as dyspnoea, wheeze, and exercise intolerance 3.

The posterior cartilage free tracheal membrane bulges forwards excessively during expiration. It can be observed in the number of conditions:

The prognosis depends of the severity of the condition. Varied management strategies have been proposed with some authors suggested tracheoplasty for selected cases 7.

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Article information

rID: 43023
System: Chest
Section: Gamuts
Tag: cases
Synonyms or Alternate Spellings:
  • Dynamic collapse of the trachea
  • Excessive dynamic airway collapse (EDAC)
  • Excessive dynamic airway collapse

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