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Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
Causes Intravascular ... intravascular coagulation ... (DIC) - HELLP ... hemoglobinuria (PNH) Extravascular ... #Extravascular
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
PT and/or aPTT ... PT and aPTT 1. ... Disseminated intravascular ... coagulation (DIC ... #aPTT #Prolonged
ISTH Scoring System for Disseminated Intravascular Coagulation (DIC)
Platelet count:
 • Expected: Low (or normal)
 • Elevation
Intravascular Coagulation ... (DIC) Platelet ... , aPTT: • Expected ... Intravascular #Coagulation ... Scoring #diagnosis #hematology
Disseminated Intravascular Coagulation (DIC) Overview

Increased Clotting and Consumption of Clotting Factors

Findings:
 • Bleeding
 • Recent history
Disseminated Intravascular ... Thrombocytopenia • Prolonged ... PT/PTT • Low ... INR < 2.3 - APTT ... Intravascular #Coagulation
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
PT and aPTT If ... aPTT are both prolonged ... hemorrhage • Disseminated ... #aPTT #Prolonged ... #differential #hematology
Causes of Post-Partum Hemorrhage - Differential Diagnosis Algorithm
Blood Loss: >500mL post vaginal delivery OR >1000 mL
Causes of Post-Partum ... . prolonged/induced ... HELLP syndrome • Disseminated ... intravascular coagulation ... (DIC) • Anti-coagulation
Bleeding and Bruising - Disorders of Hemostasis - Differential Diagnosis Framework

== Quantitative or Qualitative defect in
prolonged after ... failure, disseminated ... intravascular coagulation ... discern these causes ... Differential #Diagnosis #Hematology