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differential coagulation prolonged abnormal management algorithm bleeding bruising dic disorders disseminated laboratory mixing treatment workup activation anemia atlas basics evaluation
How to Evaluate an Abnormal APTT Step 1: Is the PT or APTT Artifactually Prolonged? Step 2: Is
Step 1: Is the PT ... Prolonging the PT ... to identify the cause ... #prolonged #diagnosis ... #hematology #evaluation
Causes of Prolonged PT (INR), Prolonged PTT • Prolonged PT (INR), Prolonged PTT • Prolonged PT
Causes of Prolonged ... PTT, Normal PT ... #Differential #Diagnosis ... #Algorithm #Causes ... #Hematology #coagulation
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes Intravascular Hemolysis: • Mechanical Trauma (Microangiopathic hemolytic anemia):
Diagnostic Framework ... for Hemolysis - Intravascular ... Causes Intravascular ... #Causes #differential ... #diagnosis #hematology
Causes of Abnormal PT and/or aPTT Prolonged Prothrombin Time (PT) 1. Acquired deficiency of FVII
Causes of Abnormal ... PT and/or aPTT ... Disseminated intravascular ... #Causes #diagnosis ... #differential #hematology
Differential Diagnosis for a Prolonged PT and aPTT If the PT and the aPTT are both prolonged,
Differential Diagnosis ... for a Prolonged PT ... PT and the aPTT ... #Causes #diagnosis ... #differential #hematology
ISTH Scoring System for Disseminated Intravascular Coagulation (DIC) Platelet count: • Expected: Low (or normal) • Elevation
for Disseminated Intravascular ... , aPTT: • Expected ... using INR use PT ... ISTH #Scoring #diagnosis ... #hematology #laboratory
Disseminated Intravascular Coagulation (DIC) Overview Increased Clotting and Consumption of Clotting Factors Findings: • Bleeding • Recent history
Disseminated Intravascular ... • Prolonged PT ... Fibrinogen: ↓ • PT ... #Coagulation #diagnosis ... #management #hematology
Causes of Thrombocytopenia and Platelet Disorders - Differential Diagnosis and Workup History: - Prior platelet count, family
- Differential Diagnosis ... : INR/PT, aPTT(liver ... function test, ANA (e.g ... #Differential #Diagnosis ... #hematology
Mixing Study • Clotting tests can be abnormal due to either a clotting factor deficiency, or
factor activity (e.g ... PT and/or aPTT) ... Mixing #Study #diagnosis ... #hematology #pathophysiology ... #hematology #laboratory
Causes of Bleeding / Bruising - Differential Diagnosis Algorithm Thrombocytopenia - Quantitative Defect • Decreased Production •
Causes of Bleeding ... - Differential Diagnosis ... Rare • Drugs (e.g ... • Disseminated Intravascular ... #Hematology
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