Radio- At/Inf

Question 1

Atelectasis Def

Types

Answer 1

Airless lung

Complete/lobar/subsegmental/round

Question 2

Atelectasis can shfit

Answer 2

Fissures
Vessels
Airways
Diaphragm
Mediastinum

Question 3

Obstructive At

Answer 3

Obstruction btw trachea/alveoli
Alv gas is resorped by pulm cap
Involved lung is dense w less air
Change in position/shape of fissure

Question 4

Obstructive mechanism

Answer 4

May not totally collapse (POP-not infected)

Will see densely opacified lung that confroms to lung segment w/o air bronchograms

Question 5

Mediastinum typically positioned

Answer 5

left as we move down

Question 6

Compressive atelect

Answer 6

loss of volume adjacent to PTX/PE/SOL

Question 7

PNA vs GGO

Answer 7

Consolidation/dense/no volume lost

Diffuse, hazy, structures seen

Question 8

Air bronchogram

Answer 8

Parenchyma is dense due to airspace filling and bronchus is air filled

PNA and compressive atelectasis

Question 9

Pleural effusion

Answer 9

Fluid btw visceral/parietal pleura

Uniform density, no lung markings

Question 10

PE exudates

Transexudates

Answer 10

E- inflam/neoplasia of pleural surfaces leads to capillary leakage of hi protein fluid (loculate)

T- inc HP and dec OP leaks low protein fluid (free flowing, bilateral)

Question 11

LLL atelectasis

Answer 11

Pull LPA behind heart (cant see it)

Lose angle of heart/diaphragm

Question 12

PNA vs atelectasis

Answer 12

Fever, leukocytosis, Pleurisy, sputum all PNA