Citation, DOI, disclosures and article data
Citation:
Weerakkody Y, K Karuppannan J, Di Muzio B, et al. Excessive dynamic airway collapse. Reference article, Radiopaedia.org (Accessed on 19 Apr 2024) https://doi.org/10.53347/rID-69052
Excessive dynamic airway collapse (EDAC) refers to a dynamic form of central airway obstruction characterized by a decrease of ≥50% (more recent publications suggest >70%) in the cross-sectional area of the tracheobronchial lumen. Diagnosis is usually confirmed by dynamic cross-sectional imaging studies or bronchoscopy.
Some authors consider an overlap with tracheomalacia, however, it is best thought that tracheomalacia describes a pathology whereby the cartilaginous structures of the trachea are weak, while EDAC is a mechanical description of the resultant effect on the airway 1.
It is marked by excessive bulging of the posterior membrane into the airway lumen during exhalation.
Associations
Can co-exist in a patient with chronic obstructive pulmonary disease 1.
Classification
Some classify in terms of severity where a collapse of >90% during expiration on dynamic imaging is considered as severe 4.
CT
Typically exaggerated bulging of the posterior wall within the airway lumen during exhalation with an excessive flattening in AP diameter.
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1. Joosten S, MacDonald M, Lau KK, Bardin P, Hamilton G. Excessive dynamic airway collapse co-morbid with COPD diagnosed using 320-slice dynamic CT scanning technology. (2012) Thorax. 67 (1): 95-6. doi:10.1136/thx.2009.132035 - Pubmed
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2. Murgu SD, Colt HG. Treatment of adult tracheobronchomalacia and excessive dynamic airway collapse : an update. (2006) Treatments in respiratory medicine. 5 (2): 103-15. Pubmed
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3. Kheir F, Majid A. Tracheobronchomalacia and Excessive Dynamic Airway Collapse: Medical and Surgical Treatment. (2018) Seminars in respiratory and critical care medicine. 39 (6): 667-673. doi:10.1055/s-0038-1676571 - Pubmed
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4. Parikh M, Wilson J, Majid A, Gangadharan S. Airway stenting in excessive central airway collapse. (2017) Journal of visualized surgery. 3: 172. doi:10.21037/jovs.2017.10.12 - Pubmed
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5. Sindhwani G, Sodhi R, Saini M, Jethani V, Khanduri S, Singh B. Tracheobronchomalacia/excessive dynamic airway collapse in patients with chronic obstructive pulmonary disease with persistent expiratory wheeze: A pilot study. (2016) Lung India : official organ of Indian Chest Society. 33 (4): 381-4. doi:10.4103/0970-2113.184870 - Pubmed
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6. Kalra A, Abouzgheib W, Gajera M, Palaniswamy C, Puri N, Dellinger RP. Excessive dynamic airway collapse for the internist: new nomenclature or different entity?. (2011) Postgraduate medical journal. 87 (1029): 482-6. doi:10.1136/pgmj.2010.111948 - Pubmed
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7. Leong P, Bardin PG, Lau KK. What's in a name? Expiratory tracheal narrowing in adults explained. (2013) Clinical radiology. 68 (12): 1268-75. doi:10.1016/j.crad.2013.06.017 - Pubmed
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8. Aslam A, De Luis Cardenas J, Morrison R et al. Tracheobronchomalacia and Excessive Dynamic Airway Collapse: Current Concepts and Future Directions. Radiographics. 2022;42(4):1012-27. doi:10.1148/rg.210155 - Pubmed
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