Atelectasis Flashcards
Most common cause of atelectasis
obstruction of bronchial lumen
Difference between primary vs secondary atelectasis
Primary atelectasis
due to lack of communication of airway with affected part of the lungs NEVER inflated
Secondary
congenital anomaly occludes lumen
Examples of Resorptive atelectasis
post anesthesia using 100% oxygen
Neuromuscular
chest wall or abd pain
In Compressive atelectasis, Compression of lung parenchyma will ________ transmural pressure
decrease
hence
distends alveolus
extrusion of gas out
reduced reinflatiin
Pneumothorax and effusion are what type of atelectasis
Passive or Relaxation
mechanism of relaxation/passive atelectasis
pleural fluid or air
loss of negative pressure
lung recoils to its deflated volume
At what age does Pores if Kohn usually form
3 to 4 yo
it functions as collateral communication bet neighboring alveoli
even vq ratio
pores of kohn
why is RML prone to atelectasis in pulmo infection
smaller intraluminal diameter
Pe findings for partial atelectasis
crackles
inspiratory and expiratory
other pe findings of atelectasis
dullness to percussion
absent or diminished bs
why is oxygen sat normal in whole lung atelectasi
alveolar hypoxia causing reflex vasoconstriction
Intubation or mech ven causes temporary deterioration in o2 sat because of
abolition of the protective vasoconstrictive reflex
intrapulmo shunting
Lung function in px with atelectasis
normal if small
restrictive (reduced fvc and fev1)
normal fev1/fvc ratio
Radiographic fx of atelectasis
elev of diaphragm
narrowing of ics
mediastinal shift and tracheal contours ipsilateral
Chest signs of atelectasis related to location
