13 results
Hypoxemia Differential Diagnosis Algorithm by A-a Gradient

Normal A-a Gradient:
 • ↓ Atmospheric pressure
 • Hypoventilation: CNS
Hypoxemia Differential ... Diagnosis Algorithm ... MatthewHoMD #Hypoxemia ... #Hypoxia #Differential ... #pulmonary #Aa
Causes of Hypoxemia- Differential Diagnosis Algorithm
Ventilation/perfusion Mismatch
 • Airway Disease (Asthma, COPD)
 • Vascular (PE*)
 •
Causes of Hypoxemia ... Differential Diagnosis Algorithm ... • Interstitial lung ... Abnormalities #Hypoxemia ... #Hypoxia #Differential
Hypoxemic Respiratory Failure - Differential Diagnosis Framework
DECREASED INSPIRED OXYGEN
 • Low PATM Can decrease first part
: Interstitial lung ... gravity-dependent gradients ... direction leads to hypoxemia ... bypassing the lungs ... Respiratory #Failure #hypoxia
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Embolism, Obstructive Lung ... Disease and more • Diffusion ... Defect: Pulmonary ... , Interstitial Lung ... #Hypoxia #hypoxemia
Hypoxemia / Hypoxia - Rapid Response Management Algorithm

Stridor - Upper airway pathology:
 • Anaphylaxis
 • Foreign
Hypoxemia / Hypoxia ... Response Management Algorithm ... atelectasis • Lung ... Sophia_Hayes_MD #Hypoxemia ... #Hypoxia #differential
COVID-19 RESPIRATORY PATHWAY ALGORITHM
Awake proning may help with oxygenation
Permissive hypoxemia, if closely monitored and in the
COVID-19 RESPIRATORY ... PATHWAY ALGORITHM ... oxygenation Permissive hypoxemia ... absence of AMS/poor perfusion ... Coronavirus #SARSCOV2 #Hypoxemia
General schema for respiratory support in patients with COVID-19
Low flow nasal cannula
 • Typically set at
patients with COVID ... in more severe hypoxemia ... for refractory hypoxemia ... #criticalcare #hypoxia ... #failure #algorithm
Proposed Respiratory Support Algorithm in COVID19

The ‘intubate early’ paradigm, where patients who “fail” low flow oxygen
Respiratory Support Algorithm ... in COVID19 The ... lung disease are ... #criticalcare #hypoxia ... #failure #algorithm
Causes of Pulmonary Hypertension - Differential Diagnosis Algorithm
Pulmonary Arterial Hypertension
 • Idiopathic
 • Associated with:
Causes of Pulmonary ... Pulmonary Arterial ... • Valvular Lung ... Disease and/or Hypoxemia ... • Interstitial Lung
Hepatopulmonary Syndrome - Diagnosis and Management Summary
A defect in arterial oxygenation due to a gas exchange
absence of intrinsic lung ... upright position • Hypoxemia ... Quantifies degree of hypoxemia ... on radioactive lung ... 80mmHg or A-a gradient