Question

question 2 (mandatory) (10 points)
listen
which of the following is the mechanism by which there is collapse of the right middle lobe due to obstruction of the bronchus by enlarged hilar lymph nodes involved with cancer?
resorption atelectasis
microatelectasis
contraction atelectasis
compression atelectasis

Explanation:

Resorption atelectasis occurs when the bronchus is obstructed, and the air in the affected lung lobe (in this case, the right middle lobe) is gradually absorbed by the bloodstream. Microatelectasis is related to small - scale collapse due to factors like surfactant deficiency. Contraction atelectasis is due to fibrous tissue pulling the lung. Compression atelectasis is due to external pressure (like fluid in the pleural space) compressing the lung. Here, obstruction of the bronchus (by enlarged lymph nodes) leads to resorption of air in the lobe.

Answer:

Resorption atelectasis