51 results
Algorithm for Investigation of Abnormal Coagulation Tests
- Prolonged PT
- Prolonged aPTT and Prolonged PT
- Prolonged aPTT

Dr.
Investigation of Abnormal ... Tests - Prolonged PT ... - Prolonged aPTT ... and Prolonged PT ... #Hematology #Diagnosis
How to Evaluate an Abnormal APTT
Step 1: Is the PT or APTT Artifactually Prolonged?
Step 2: Is
to Evaluate an Abnormal ... the PT or APTT ... Prolonging the PT ... ISNeducation #Abnormal ... #diagnosis #hematology
Causes of Prolonged PT (INR), Prolonged PTT
 • Prolonged PT (INR), Prolonged PTT
 • Prolonged PT
(INR), Normal PTT ... , Normal PT (INR ... , Normal PT (INR ... #Differential #Diagnosis ... Algorithm #Causes #Hematology
Approach to Elevated aPTT / PT - Differential Diagnosis Algorithm

aPTT: Intrinsic / Final
PT: Extrinsic / Final

By
/ PT - Differential ... Diagnosis Algorithm ... aPTT: Intrinsic ... #Hematology #differential ... #diagnosis
Prolonged APTT - Diagnostic Algorithm

#Prolonged #APTT #PTT #abnormal #Diagnosis #Algorithm #hematology
Diagnostic Algorithm ... #Prolonged #APTT ... #PTT #abnormal ... #Diagnosis #Algorithm ... #hematology
Approach to Thrombotic Microangiopathy (TMA) - Differential Diagnosis and Management Algorithm

Suspected TMA: Unexplained thrombocytopenia + MAHA
- Differential Diagnosis ... /aPTT MAHA likely ... hemosiderin • PT ... /aPTT normal • ... Management #Algorithm #hematology
Von Willebrand Disease - Most common inherited bleeding disorder 
Clinical 
 • Easy bruising 
 •
Laboratory • Normal ... PT/INR • Normal ... aPTT (prolonged ... VonWillebrand #Disease #Diagnosis ... #Hematology
Mixing Study
 • Clotting tests can be abnormal due to either a clotting factor deficiency, or
an inhibitor of normal ... PT and/or aPTT) ... Mixing #Study #diagnosis ... #hematology #pathophysiology ... #hematology #laboratory
Prothrombin Time (PT) and Partial Thromboplastin Time (PTT)

Prothrombin Time (PT) - Often Elevated in:
 • Vitamin
Prothrombin Time (PT ... Prothrombin Time (PT ... inhibitor • Liver ... Thromboplastin #laboratory #hematology ... #diagnosis
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
PT and/or aPTT ... Early liver disease ... #PT #aPTT #Prolonged ... #Causes #diagnosis ... #differential #hematology