9 results
Hypoxemia Differential Diagnosis Algorithm by A-a Gradient

Normal A-a Gradient:
 • ↓ Atmospheric pressure
 • Hypoventilation: CNS
Differential Diagnosis Algorithm ... by A-a Gradient ... 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 = ... Hypoventilation Syndrome ... Hepatopulmonary Syndrome ... and more • V/Q Mismatch ... UnremarkableLab #AA
Diagnosis of ascites according to the serum ascites albumin gradient (SAAG)
SAAG ≥ 1.1:
 - Ascitic protein
ascites albumin gradient ... Late Budd-Chiari syndrome ... leak, Nephrotic syndrome ... ascites #albumin #gradient ... differential #diagnosis #algorithm
Hepatopulmonary Syndrome (HPS) Diagnosis Algorithm
Bubble echo is the first piece of the puzzle. The nail on
Hepatopulmonary Syndrome ... HPS) Diagnosis Algorithm ... the dx is an A-a gradient ... Hepatopulmonary #Syndrome ... HPS #Diagnosis #Algorithm
Causes of Hypoxemia- Differential Diagnosis Algorithm
Ventilation/perfusion Mismatch
 • Airway Disease (Asthma, COPD)
 • Vascular (PE*)
 •
Differential Diagnosis Algorithm ... Ventilation/perfusion Mismatch ... Hypoventilation Syndrome ... Differential #Diagnosis #Algorithm
Algorithm for Suspected SVC Syndrome

SVC syndrome suspected: Facial/arm/neck edema, distended neck/chest veins, facial plethora, dyspnea, cough,
Algorithm for Suspected ... SVC Syndrome ... SVC syndrome suspected ... Grading: 0: Asymptomatic ... #Algorithm #diagnosis
Hypoxemic Respiratory Failure - Differential Diagnosis Framework
DECREASED INSPIRED OXYGEN
 • Low PATM Can decrease first part
obesity-hypoventilation syndrome ... common than VIQ mismatch ... PERFUSION (V/Q) MISMATCH ... gravity-dependent gradients ... hepatopulmonary syndrome
Hepatopulmonary Syndrome - Illness Script
HPS is a pulmonary disorder of chronic liver disease characterized by a
Hepatopulmonary Syndrome ... time = increased Aa ... gradient • Intrapulmonary ... portal HTN • Aa ... gradient ≥15 mmHg
Hepatopulmonary Syndrome - Diagnosis and Management Summary
A defect in arterial oxygenation due to a gas exchange
Hepatopulmonary Syndrome ... Hypoxemia - V/Q mismatch ... 80mmHg or A-a gradient ... hepatopulmonary #syndrome