16 results
Coagulation Cascade and Anticoagulant Sites of Action

- Amy Chung, MD, MSc https://twitter.com/AmyChung

#AntiCoagulation #Cascade #Anticoagulants #Medications #Pharmacology
Coagulation Cascade ... #Pharmacology #Pathophysiology ... Mechanisms #DOAC #Hematology
Hemostasis Physiology

The blood's response to blood vessel injury can be viewed as four interrelated steps. 
Roman
numerals refer to coagulation ... #Hemostasis #Pathophysiology ... #Coagulation #Cascade ... #Hematology
Disseminated Intravascular Coagulation (DIC) Overview

Increased Clotting and Consumption of Clotting Factors

Findings:
 • Bleeding
 • Recent history
Intravascular Coagulation ... incompatible blood transfusion ... protein C and S Pathophysiology ... hydration • RBC transfusion ... treatment #management #hematology
TRALI vs TACO - Transfusion Reactions
TRALI:
 • Epidemiology: 0.1% of transfused patientsl
 • Risk factors: Critical
TRALI vs TACO - Transfusion ... plasma volume transfusion ... blood donor • Pathophysiology ... • Pathophysiology ... #Reactions #hematology
Thromboelastography (trademarked as TEG)
 • Graphical representation of the fibrin polymerization process
 • Point-of-care anti-coagulation monitoring
Point-of-care anti-coagulation ... determining if transfusion ... compared to routine transfusion ... reduce number of transfusions ... interpretation #hematology
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
intravascular coagulation ... HUS) • Other: Transfusion ... implicated) - Transfusion ... differential #diagnosis #hematology
The coagulation cascade is shown, separated into different phases with their endogenous and pharmacological inhibitors shown.
The coagulation ... #Coagulation #Cascade ... diagnosis #models #hematology ... #pathophysiology
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
Congenital intrinsic coagulation ... Massive hemorrhage ... intravascular coagulation ... #differential #hematology ... #coagulation
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
binding • Massive ... #differential #hematology ... #coagulation
Central Retinal Artery Occlusion: Pathogenesis and clinical findings
 • Inflammatory Disease: (i.e. GCA, SLE, GPA) ->
) -> Increased coagulation ... decreased anti-coagulation ... • Hematologic ... Occlusion #CRAO #pathophysiology