Preferred Label :
air trapping; RADLEX synonyms :
gas trapping; Definition :
Pathophysiology.—Air trapping is retention of air in the lung distal to an obstruction
(usually partial). CT scans.—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 (11,12) (Fig 4). Differentiation from areas of decreased attenuation
resulting from hypoperfusion as a consequence of an occlusive vascular disorder (eg,
chronic thromboembolism) may be problematic (13), but other findings of airways versus
vascular disease are usually present. (See also mosaic attenuation pattern.) [Fleischner
Society]; Image(s) :
RID28537Source :
Fleischner Society;
Origin ID : RID28537;
Automatic exact mappings (from CISMeF team)
Pathophysiology.—Air trapping is retention of air in the lung distal to an obstruction
(usually partial). CT scans.—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 (11,12) (Fig 4). Differentiation from areas of decreased attenuation
resulting from hypoperfusion as a consequence of an occlusive vascular disorder (eg,
chronic thromboembolism) may be problematic (13), but other findings of airways versus
vascular disease are usually present. (See also mosaic attenuation pattern.) [Fleischner
Society]
