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

Dr.
Tests - Prolonged PT ... - Prolonged aPTT ... and Prolonged PT ... - Prolonged aPTT ... #Laboratory #Hematology
Effect of Anticoagulants on Coagulation Tests
PT / INR, aPTT, Anti-Xa Activity, Activated Clotting Time, Thrombin Time,
Coagulation Tests PT ... / INR, aPTT, Anti-Xa ... Anticoagulants #Tests #Anticoagulation ... Testing #Diagnosis #Laboratory
Prothrombin Time (PT) and Partial Thromboplastin Time (PTT)

Prothrombin Time (PT) - Often Elevated in:
 • Vitamin
Prothrombin Time (PT ... Thromboplastin Time (PTT ... Prothrombin Time (PT ... thematttsai #PT ... #PTT #Prothrombin
Von Willebrand Disease - Most common inherited bleeding disorder 
Clinical 
 • Easy bruising 
 •
GI. uterine) Laboratory ... 2B) • Normal PT ... INR • Normal aPTT
Disseminated Intravascular Coagulation (DIC) Overview

Increased Clotting and Consumption of Clotting Factors

Findings:
 • Bleeding
 • Recent history
• Prolonged PT ... /PTT • Low plasma ... Fibrinogen: ↓ • PT ... /INR: ↑ • PTT: ... INR < 2.3 - APTT
ISTH Scoring System for Disseminated Intravascular Coagulation (DIC)
Platelet count:
 • Expected: Low (or normal)
 • Elevation
platelet aggregation PT ... , aPTT: • Expected ... using INR use PT ... diagnosis #hematology #laboratory
Mixing Study
 • Clotting tests can be abnormal due to either a clotting factor deficiency, or
PT and/or aPTT) ... pathophysiology #hematology #laboratory
The coagulation cascade is shown, separated into different phases with their endogenous and pharmacological inhibitors shown.
thrombin #clot #PT ... #PTT #diagnosis ... pathophysiology #anticoagulation
TTP - Laboratory Evaluation for Thrombotic Thrombocytopenic Purpura

Activity of von Willebrand factor-cleaving protease activity - A
TTP - Laboratory ... be performed PT ... , PTT, and fibrinogen
Effect of Direct Oral Anticoagulants on Hemostatic Tests
Horizontal bars correspond to the approximate range of detectability
clotting time; TT ... #doac #noac #anticoagulation ... #hematology #laboratory ... #testing #aptt