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

Dr.
Investigation of Abnormal ... PT - Prolonged aPTT ... #Coagulation #Abnormal ... #Hematology #Diagnosis ... #Workup
How to Evaluate an Abnormal APTT
Step 1: Is the PT or APTT Artifactually Prolonged?
Step 2: Is
to Evaluate an Abnormal ... APTT Step 1: Is ... to identify the cause ... ISNeducation #Abnormal ... #diagnosis #hematology
Causes of Prolonged PT (INR), Prolonged PTT
 • Prolonged PT (INR), Prolonged PTT
 • Prolonged PT
Prolonged PT (INR), Normal ... PTT, Normal PT ... , Normal PT (INR ... #Differential #Diagnosis ... #Hematology #coagulation
Prolonged APTT - Diagnostic Algorithm

#Prolonged #APTT #PTT #abnormal #Diagnosis #Algorithm #hematology
Diagnostic Algorithm ... #Prolonged #APTT ... #PTT #abnormal ... #Diagnosis #Algorithm ... #hematology
Mixing Study
 • Clotting tests can be abnormal due to either a clotting factor deficiency, or
Plasma → Recheck abnormal ... PT and/or aPTT) ... Mixing #Study #diagnosis ... #hematology #pathophysiology ... #hematology #laboratory
Causes of Anemia with Normal Mean Corpuscular Volume (MCV) - Differential Diagnosis Algorithm
Decreased WBCs
 - Decreased/NormaI
with Normal Mean ... PRV, Chronic) Normal ... Polychromatic Macrocytes, Normal ... Hemoglobinopathy - Normal ... #Hematology
Von Willebrand Disease - Most common inherited bleeding disorder 
Clinical 
 • Easy bruising 
 •
Laboratory • Normal ... type 2B) • Normal ... PT/INR • Normal ... aPTT (prolonged ... #Hematology
Causes of Polycythemia (Erythrocytosis) - Differential Diagnosis Algorithm
Relative - Normal RBC Mass / Decreased Plasma Volume
Algorithm Relative - Normal ... Positive - Low/Normal ... Saturation 90%, Abnormal ... Heart Disease Abnormal ... #Hematology
Approach to Thrombotic Microangiopathy (TMA) - Differential Diagnosis and Management Algorithm

Suspected TMA: Unexplained thrombocytopenia + MAHA
- Differential Diagnosis ... antiglobulin test, PT/aPTT ... hemosiderin • PT/aPTT ... normal • DAT ... Management #Algorithm #hematology
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
Differential Diagnosis ... the PT and the aPTT ... amyloidosis #Abnormal ... #Causes #diagnosis ... #differential #hematology