Atelectasis Flashcards
what is atelectasis
loss of lung volume due to inadequate expansion
does atelectasis lead to ventilation perfusion imbalance (leading to hypoxia)
yes
it involves segment or …. or ….
lobe or lung
if cause is removed is it reversible
yes
types of atelectasis
resorption (obstructive), compression , contraction , microatelectasis
resorption atelectasis due to
foreign body, mucus plug due to bronchitis or asthma or cystic fibrosis , post surgery , tumor
mediastinal shift in each type of atelectasis
resorption same side
compression opposite side
contraction and microatelectasis no shift
compression atelectasis causes
air or fluid in pleural cavity
what happens to diaphragm in compression atelectasis
elevated
contraction atelectasis causes
post inflammatory scarring, fibrotic changes
is contraction atelectasis reversible
usually irreversible
microatelectasis cause
loss of surfactant
microatelectasis location
generalized
where is microatelectasis usually seen
acute or neonatal respiratory distress synd
grossly and microscope ate.
gross: shrunken purple sub crepiant nodular lung
micro,: slit like alveoli, congested septae and hyaline mem in micro