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2)POSTERIOR TO HEART
3)UNDER THE ARCH
Almost not seen in resorption collapse
Seen in adhesive and passive collapse.
And in cicatrisation collapse with
Pre existing Lung
May alter the expected anatomical
displacements in collapse
There exists a relationship between the
Degree of diaphragmatic elevation is
directly related to amount of collapse
and inversely to the hilar displacement
and compensatory hyperinflation.
Eg: Lower lobe collapse, if
diaphragmatic elevation is marked, hilar
depression is diminished.
Double Lesion Sign
If collapse of multiple segments occurs
in certain combination , the likelyhood of
bronchogenic carcinoma is small.
Eg: RUL and RML is rarely seen in
bronchogenic ca but RML and RLL is
Decrease in volume of air within the Lung.
Associated with normal lung volume.
Pulmonary airways 1) Conducting network
Replacement of air in the acini with fluid or
Points to Remember
Volume of lung is not reduced.
Collapse and consolidation are often
associated with one another.
When consolidation is due to fluid , its
distribution is dependent on gravity.