5 results
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
(assumes Room Air ... Defect: Pulmonary ... UnremarkableLab #AA ... Hypoxia #hypoxemia #differential ... #diagnosis
Causes of Hypoxemia- Differential Diagnosis Algorithm
Ventilation/perfusion Mismatch
 • Airway Disease (Asthma, COPD)
 • Vascular (PE*)
 •
of Hypoxemia- Differential ... Diagnosis Algorithm ... ** • Atrial Septal ... Hypoventilation Syndrome ... #Diagnosis #Algorithm
Hypoxemic Respiratory Failure - Differential Diagnosis Framework
DECREASED INSPIRED OXYGEN
 • Low PATM Can decrease first part
Respiratory Failure - Differential ... Diagnosis Framework ... gravity-dependent gradients ... shunting (eg, atrial ... #Diagnosis #pulmonary
Hepatopulmonary Syndrome - Diagnosis and Management Summary
A defect in arterial oxygenation due to a gas exchange
Hepatopulmonary Syndrome ... or anatomic shunt ... cycles after right atrial ... Arterial blood gas (ABC ... 80mmHg or A-a gradient
Negative Contrast Effect in Right Atrium - Differential Diagnosis
1. Small secundum ASD or PFO with left
in Right Atrium ... Diagnosis 1. ... left to right shunt ... echocardiogram #s4c ... #pocus #bubble