Tuesday, February 1, 2011

Atlectasis and its Types.

Loss of lung volume caused by inadequate expansion of airspaces

shunting of inadequately oxygenated blood from pulmonary arteries into veins, thus giving rise to a ventilation-perfusion imbalance and hypoxia

superimposed infection is a significant problem


Resorption Atelectasis:

Obstruction of bronchus by mucopurulent plug, usually postoperatively but may also complicate bronchial asthma, bronchiectasis, chronic bronchitis
aspiration of foreign bodies, particularly in children

Compression Atelectasis:

Accumulations of fluid, blood, or air within the pleural cavity
bedridden patients, in patients with ascites, and in patients during and after surgery; due to compression by diaphragm

Contraction Atelectasis:

Cicatrization due to any chronic infection or inflammation.


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