Air trapping

Air trapping is retention of air in the lung distal to an obstruction (usually partial). Air trapping is seen on end-expiration CT scans as parenchymal areas with less than normal increase in attenuation and lack of volume reduction. Comparison between inspiratory and expiratory CT scans can be helpful when air trapping is subtle or diffuse. Differentiation from areas of decreased attenuation resulting from hypoperfusion as a consequence of an occlusive vascular disorder (eg, chronic thromboembolism) may be problematic, but other findings of airways versus vascular disease are usually present. See Figure 4 of Hansell DM, et al., Fleischner Society: glossary of terms for thoracic imaging. Radiology. 2008;246:697-722.

http://purl.obolibrary.org/obo/HP_0033663

Differentiation from areas of decreased attenuation resulting from hypoperfusion as a consequence of an occlusive vascular disorder (eg, chronic thromboembolism) may be problematic, but other findings of airways versus vascular disease are usually present. See Figure 4 of Hansell DM, et al., Fleischner Society: glossary of terms for thoracic imaging. Radiology. 2008;246:697-722.

https://orcid.org/0000-0002-0736-9199

2021-02-27T14:37:46Z

Air trapping is retention of air in the lung distal to an obstruction (usually partial). Air trapping is seen on end-expiration CT scans as parenchymal areas with less than normal increase in attenuation and lack of volume reduction. Comparison between inspiratory and expiratory CT scans can be helpful when air trapping is subtle or diffuse.

human_phenotype

HP:0033663

Air trapping

HP:0033663

Air trapping

http://purl.obolibrary.org/obo/HP_0031983

http://purl.obolibrary.org/obo/HP_0031983