34 results
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
(assumes Room Air ... : Atelectasis, ARDS ... Edema, Atelectasis ... , Obstructive Lung ... #Hypoxia #hypoxemia
Acute Respiratory Distress Syndrome – ARDS: Clinical Cheat Sheet

An acute diffuse, inflammatory lung injury, leading to
: Clinical Cheat ... congestion with hypoxemia ... edema must be present ... be detected on CT ... or CXR ● PaO2/
ARDS/VALI progression over the course of 1 week 
 (a) Day 1 - No pathological findings.
ARDS/VALI progression ... involvement, with “white lung ... oedema due to heart ... #Clinical #Radiology ... #CXR #ChestXRay
On the left another patient with alveolar edema at admission, which resolved after treatment.
When you scroll
with alveolar edema ... #Clinical #Radiology ... #CXR #CHF #Alveolar ... #Pulmonary #Edema ... #AlveolarEdema
Air Bronchogram Sign on Chest CT
 • Patent airways surrounded by opacified lung
 • DDx: pna,
Sign on Chest CT ... DDx: pna, pulm edema ... #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Berlin Criteria for Acute Respiratory Distress Syndrome (ARDS) 
- Respiratory symptoms must have begun within one
week of a known clinical ... edema must be present ... on a chest radiograph ... computed tomographic (CT ... lobar collapse, lung
Notice that even within each lobe there is a gravity dependent difference in density.
This is only
capillary leak like in ARDS ... #Clinical #Radiology ... #CTChest #CHF # ... Alveolar #Pulmonary ... #Edema #AlveolarEdema
Crazy Paving on Chest CT
 • Thickened interlobular septa in a background of diffuse GGO's.
 •
Crazy Paving on Chest ... DDx: PAP, pulm edema ... pna, pulm hge, ARDS ... #Lung #Pulmonary ... #clinical
Stage III - Alveolar edema
This stage is characterized by continued fluid leakage into the interstitium, which
consolidations and air ... #Clinical #Radiology ... #CXR #CHF #Alveolar ... #Pulmonary #Edema ... #AlveolarEdema
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
CT demonstrates ... lesions than the chest ... abutting the pleura, air-bronchograms ... #Clinical #Radiology ... #CXR #CTChest #