4 results
Hypoxemia Differential Diagnosis Algorithm by A-a Gradient

Normal A-a Gradient:
 • ↓ Atmospheric pressure
 • Hypoventilation: CNS
Differential Diagnosis Algorithm ... Cardiac, Vascular, Alveolar ... • V/Q Mismatch ... Differential #Diagnosis #Algorithm ... #pulmonary #Aa
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
A-a gradient = ... • Alveolar Hypoventilation ... and more • V/Q Mismatch ... UnremarkableLab #AA ... #Gradient #alveolar
Hypoxemic Respiratory Failure - Differential Diagnosis Framework
DECREASED INSPIRED OXYGEN
 • Low PATM Can decrease first part
first part of alveolar ... second part of alveolar ... across capillary-alveolar ... common than VIQ mismatch ... gravity-dependent gradients
Hepatopulmonary Syndrome - Illness Script
HPS is a pulmonary disorder of chronic liver disease characterized by a
Mismatch? ... time = increased Aa ... gradient • Intrapulmonary ... portal HTN • Aa ... gradient ≥15 mmHg