44 results
How to Evaluate an Abnormal APTT
Step 1: Is the PT or APTT Artifactually Prolonged?
Step 2: Is
K Antagonists, Heparin ... to identify the cause ... of Prolonged APTT ... #prolonged #diagnosis ... #hematology #evaluation
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 ... • Reduced liver ... #hematology #coagulation
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
Early liver disease ... e.g. heparin ... Reduced liver synthesis ... #diagnosis #differential ... #hematology #coagulation
Jaundice - Differential Diagnosis Algorithm
Pre-Hepatic - Unconjugated Hyperbilirubinemia
Increased Production
 • Hemolysis
 • Ineffective Erythropoiesis
 • Hematoma
Decreased
- Differential Diagnosis ... Sepsis • Drugs (e.g ... • Gilbert's Syndrome ... #Algorithm #Causes ... #Hepatology #bilirubinemia
Summary of Coagulation Deficiencies
Inherited:
 • Hemophilia A - Deficiency of Factor VIII
 • Hemophilia B -
Medications - Heparin ... ) • Advanced Liver ... Deficiencies #Summary #table ... #comparison #diagnosis ... #hematology #deficiency
Prothrombin Time (PT) and Partial Thromboplastin Time (PTT)

Prothrombin Time (PT) - Often Elevated in:
 • Vitamin
Thromboplastin Time (PTT ... inhibitor • Liver ... elevated in: • Heparin ... Thromboplastin #laboratory #hematology ... #diagnosis
Drug Induced Liver Injury (DILI) - Stepwise Diagnosis Algorithm
DILI suspicion
Features toxic aetiology: Skin involvement, Kidney injury,
DILI) - Stepwise Diagnosis ... for alternative causes ... disease, Hepatic ... #Injury #Diagnosis ... #Algorithm #hepatology
Causes of Splenomegaly - Differential Diagnosis Algorithm
Infectious
 • Bacterial
 • Viral (EBV)
 • Parasitic
 • Fungal
Congestive
Causes of Splenomegaly ... - Differential Diagnosis ... Hepatic, Portal, ... #Differential #Diagnosis ... #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 ... bypass), LFT (liver ... #hematology
Portal Hypertension - Differential Diagnosis
Portal Pressure = the pressure difference between the pressure in the portal
- Differential Diagnosis ... and hepatorenal syndrome ... • Budd Chiari syndrome ... sarcoidosis) • Liver ... #causes #hepatology