50 results
How to Evaluate an Abnormal APTT
Step 1: Is the PT or APTT Artifactually Prolonged?
Step 2: Is
: Is the PT or APTT ... K Antagonists, Heparin ... to identify the cause ... #prolonged #diagnosis ... #hematology #evaluation
Causes of Thrombocytopenia - Differential Diagnosis Algorithm
 
Decreased Megakaryopoiesis
 • Aplastic Anemia
 • Toxic Damage (e.g.
Causes of Thrombocytopenia ... - Differential Diagnosis ... Megakaryopoiesis • Aplastic Anemia ... #Algorithm #Causes ... #Hematology
Causes of Thrombocytopenia and Platelet Disorders - Differential Diagnosis and Workup
History:
 - Prior platelet count, family
Causes of Thrombocytopenia ... - Differential Diagnosis ... : INR/PT, aPTT(liver ... changes), high MCV anemia ... #hematology
Approach to Thrombotic Microangiopathy (TMA) - Differential Diagnosis and Management Algorithm

Suspected TMA: Unexplained thrombocytopenia + MAHA
- Differential Diagnosis ... TMA: Unexplained thrombocytopenia ... hemoglobin/hemosiderin, Hepatic ... hemosiderin • PT/aPTT ... Management #Algorithm #hematology
Causes of Thrombocytosis - Differential Diagnosis Algorithm
Spurious:
 • Artifact (redo CBC)
Autonomous:
 • Essential thrombocytosis
 • Polycythemia
Causes of Thrombocytosis ... - Differential Diagnosis ... following EtOH induced thrombocytopenia ... Iron deficiency anemia ... #Hematology
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
Differential Diagnosis ... (e.g. heparin contamination ... thrombin inhibitors, heparin ... #diagnosis #differential ... #hematology #coagulation
Disseminated Intravascular Coagulation (DIC) Overview

Increased Clotting and Consumption of Clotting Factors

Findings:
 • Bleeding
 • Recent history
Treat primary cause ... INR < 2.3 - APTT ... #Coagulation #diagnosis ... #causes #treatment ... #management #hematology
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
Causes of Abnormal ... unfractionated heparin ... e.g. heparin ... #diagnosis #differential ... #hematology #coagulation
4-T Score for the Likelihood of Heparin Induced Thrombocytopenia
 - Thrombocytopenia - Compare the highest platelet
count
Likelihood of Heparin ... Other potential cause ... #4TScore #HIT #Heparin ... #Likelihood #Diagnosis ... #Hematology
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
Diagnostic Framework ... Extravascular Causes ... microangiopathy: Thrombotic thrombocytopenic ... Extravascular #Causes ... #hematology #anemia