Algorithms in Medicine @MatthewHoMD
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Matthew Ho, MD PhD https://twitter.com/MatthewHoMD
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Ascites Differential Diagnosis Table - Serum Ascites Albumin Gradient (SAAG)

SAAG ≥ 1.1:
 • Cirrhosis
 • Portal
Ascites Differential ... Ascites Albumin Gradient ... tamponade • IVC obstruction ... Serum #Albumin #Gradient ... #SAAG #hepatology
Hypoxemia Differential Diagnosis Algorithm by A-a Gradient

Normal A-a Gradient:
 • ↓ Atmospheric pressure
 • Hypoventilation: CNS
Hypoxemia Differential ... Diagnosis Algorithm ... by A-a Gradient ... Hypoxemia #Hypoxia #Differential ... #Diagnosis #Algorithm
Approach to Leukocytosis - Differential Diagnosis Algorithm

Features of hematologic malignancy:
 • Symptoms: B-symptoms, bruising/bleeding, fatigue/weakness, immunosuppression
Leukocytosis - Differential ... Diagnosis Algorithm ... Features of hematologic ... #Diagnosis #Algorithm ... #hematology #WBC
Approach to Thrombotic Microangiopathy (TMA) - Differential Diagnosis and Management Algorithm

Suspected TMA: Unexplained thrombocytopenia + MAHA
Microangiopathy (TMA) - Differential ... and Management Algorithm ... hemosiderin, Hepatic function ... Diagnosis #Management #Algorithm ... #hematology
Pulmonary Function Testing (PFT) Interpretation Algorithm

Restrictive Lung Disease:
 • Chest wall or neuromuscular disorders
 • Interstitial
Pulmonary Function ... Interpretation Algorithm ... Lung Disease Obstructive ... #Pulmonary #Function ... Interpretation #Algorithm
Approach to Elevated aPTT / PT - Differential Diagnosis Algorithm

aPTT: Intrinsic / Final
PT: Extrinsic / Final

By
Elevated aPTT / PT - Differential ... Diagnosis Algorithm ... aPTT #PT #INR #Algorithm ... #Hematology #differential
Thrombocytopenia - Differential Diagnosis Algorithm

Decreased production:
 • Bone marrow suppression
 • Bone marrow failure
 • Bone
Thrombocytopenia - Differential ... Diagnosis Algorithm ... Thrombocytopenia #Differential ... #Diagnosis #Algorithm ... #hematology #platelets
Approach to Thrombocytosis - Elevated Platelet Count - Differential Diagnosis Algorithm

Peripheral Smear concerning for malignancy?
Platelet Count - Differential ... Diagnosis Algorithm ... Thrombocytosis #Platelets #Differential ... #Diagnosis #Algorithm ... #hematology
Hemolytic Anemias - Differential Diagnosis Algorithm

Signs of anemia and hemolysis:
 • ↓ Haptoglobin
 • ↑ LDH
Hemolytic Anemias - Differential ... Diagnosis Algorithm ... Hemolytic #Anemias #Differential ... #Diagnosis #Algorithm ... #hematology
Algorithmic Approach to Anemia - Differential Diagnosis Framework by MCV

Microcytic (MCV < 80) "TAILS":
 • Thalassemia
Algorithmic Approach ... to Anemia - Differential ... #Anemia #MCV #Algorithm ... #Differential # ... Diagnosis #hematology