Showing posts with label Air Bronchogram. Show all posts
Showing posts with label Air Bronchogram. Show all posts

Air Bronchogram Sign.

Pulmonary Medicine Blog By Dr Deepu

Air bronchogram

An air bronchogram is a tubular outline of an airway made visible by filling of the surrounding alveoli by fluid or inflammatory exudates. It is almost always caused by a pathologic airspace/alveolar process, in which something other than air fills the alveoli.

 Six causes of air bronchograms are
Lung consolidation
Pulmonary edema
Nonobstructive pulmonary atelectasis
Severe interstitial disease
Neoplasm
Normal expiration.
In The Image Air Bronchogram is seen.
The Magnified Image Showing Air Bronchogram On CXR and Confirmed With HRCT


The phenomenon is Characterised by  air-filled bronchi (dark) being made visible by the opacification of surrounding alveoli (grey/white). It is almost always caused by a pathologic airspace/alveolar process, in which something other than air fills the alveoli.
 Air bronchograms will not be visible if the bronchi themselves are opacified (e.g. by fluid) and thus indicate patent proximal airways.
Air bronchograms that persist for weeks despite appropriate antimicrobial therapy should raise the suspicion of a neoplastic process. CT may be planned in such cases.

Also See

The ‘Dark Bronchus’ Sign


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