Algorithms in Medicine @MatthewHoMD
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Matthew Ho, MD PhD https://twitter.com/MatthewHoMD
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Pulmonary Function Testing (PFT) Interpretation Algorithm

Restrictive Lung Disease:
 • Chest wall or neuromuscular disorders
 • Interstitial
Pulmonary Function ... Interpretation Algorithm ... Lung Disease Obstructive ... #Pulmonary #Function ... #diagnosis #asthma
Hypoxemia / Hypoxia - Rapid Response Management Algorithm

Stridor - Upper airway pathology:
 • Anaphylaxis
 • Foreign
Hypoxemia / Hypoxia ... Response Management Algorithm ... pneumothorax, COPD/asthma ... #Hypoxia #differential ... Diagnosis #Management #Algorithm
Hypoxemia Differential Diagnosis Algorithm by A-a Gradient

Normal A-a Gradient:
 • ↓ Atmospheric pressure
 • Hypoventilation: CNS
Hypoxemia Differential ... Diagnosis Algorithm ... MatthewHoMD #Hypoxemia ... #Hypoxia #Differential ... #Diagnosis #Algorithm
Approach to Thrombotic Microangiopathy (TMA) - Differential Diagnosis and Management Algorithm

Suspected TMA: Unexplained thrombocytopenia + MAHA
Microangiopathy (TMA) - Differential ... and Management Algorithm ... hemosiderin, Hepatic function ... Microangiopathy #TMA #Differential ... Diagnosis #Management #Algorithm
Erythrocytosis - Polycythemia Differential Diagnosis Algorithm

Elevated Hemoglobin:
 • Males: Hb > 16.5 g/dL/HCT ≥ 49%
 •
- Polycythemia Differential ... Diagnosis Algorithm ... Acquired Causes: • Hypoxia-driven ... Polycythemia #Vera #PV #Differential ... #Diagnosis #Algorithm
Hypokalemia - Differential Diagnosis Algorithm

Transcellular Shift:
 • Alkalosis
 • ↑ beta-2 adrenergic simulation 
 • Erythropoiesis
Hypokalemia - Differential ... Diagnosis Algorithm ... GI losses (NG suction ... #Hypokalemia #Differential ... #Diagnosis #Algorithm