4 results
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Elevation, Low Fio2 ... Atelectasis, ARDS, Pneumonia ... #alveolar #arterial ... #pulmonary #Hypoxia ... #hypoxemia #differential
Community Acquired Pneumonia - Presenting Features
 • History in favor of CAP: Dyspnea, Cough, particularly if
Community Acquired ... Pneumonia - Presenting ... , Tachycardia, Hypoxemia ... when secondary to bacterial ... breaths/min, PaO2 / FiO2
Hypoxemic Respiratory Failure - Differential Diagnosis Framework
DECREASED INSPIRED OXYGEN
 • Low PATM Can decrease first part
Failure - Differential ... gravity-dependent gradients ... • Causes: Pneumonia ... shunting (eg, atrial ... #Differential #
Community Acquired Pneumonia (CAP) - Diagnosis and Management

Pneumonia Signs/Symptoms:
 • Confusion/disorientation (LR + 1.9)
 • Cough
Community Acquired ... (LR + 2.7) • Hypoxia ... • PaO2/FiO2 ratio ... or CT Scan Bacterial ... treatment #Pulmonary #Community