7 results
COVID-19 Patterns of Lung Findings on Chest CT
1. Reverse Halo Sign
2. ARDS
3. Crazy-Paving Pattern
4. Bilateral Peripheral
Lung Findings on Chest ... CT 1. ... ARDS 3. ... Organizing Pneumonia ... Patterns #Lung #Pulmonary
Venn Diagram - Does this patient have pneumonia?
Diagnosis is generally based on three lines of evidence:
evidence of a chest ... infiltrate (e.g., CXR, CT ... , ultrasound) - ... production, pleuritic chest ... pain) and signs
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
(assumes Room Air ... Weakness, Loss of Chest ... Elasticity (flail chest ... , Pneumonia and ... UnremarkableLab #AA
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
• Pleuritic chest ... • CT: Halo sign ... Lymphadenopathy, Chest ... breath, Fatigue, Chest ... : • Chest pain
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
bronchial wall injury ... Loss of weight • Chest ... Nasal polyps and signs ... high-resolution chest ... CT) • Broncho-arterial
Hampton hump is a radiologic sign which consists of a shallow wedge-shaped opacity in the periphery
is a radiologic sign ... hump along may aid ... In this case, pulmonary ... confirmed with chest ... CT angiography.
TRALI Diagnostic Criteria
TRALI type 1 - Patients who have no risk factors for ARDS and meet
< 90% on room air ... evidence of bilateral pulmonary ... on imaging (eg. chest ... chest CT, or ultrasound ... diagnosis #Criteria #pulmonary