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

Dr.
Tests - Prolonged PT ... and Prolonged PT ... #Algorithm #Coagulation ... #Laboratory #Hematology ... #Diagnosis #Workup
Effect of Anticoagulants on Coagulation Tests
PT / INR, aPTT, Anti-Xa Activity, Activated Clotting Time, Thrombin Time,
Anticoagulants on Coagulation ... Tests PT / INR, ... aPTT, Anti-Xa Activity ... Clotting Time, Thrombin ... #Laboratory #Effects
ISTH Scoring System for Disseminated Intravascular Coagulation (DIC)
Platelet count:
 • Expected: Low (or normal)
 • Elevation
platelet aggregation PT ... , aPTT: • Expected ... using INR use PT ... ISTH #Scoring #diagnosis ... #hematology #laboratory
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
Congenital intrinsic coagulation ... drugs e.g. direct thrombin ... intravascular coagulation ... #Causes #diagnosis ... differential #hematology #coagulation
Disseminated Intravascular Coagulation (DIC) Overview

Increased Clotting and Consumption of Clotting Factors

Findings:
 • Bleeding
 • Recent history
• Increased thrombin ... organ damage Clinical ... venipuncture sites Laboratory ... INR < 2.3 - APTT ... #diagnosis #causes
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
Differential Diagnosis ... PT and the aPTT ... drugs (e.g. direct thrombin ... #Causes #diagnosis ... differential #hematology #coagulation
The coagulation cascade is shown, separated into different phases with their endogenous and pharmacological inhibitors shown.
The coagulation ... Thrombin, then primes ... #Coagulation #Cascade ... #clot #PT #PTT ... #diagnosis #models
Von Willebrand Disease - Most common inherited bleeding disorder 
Clinical 
 • Easy bruising 
 •
bleeding disorder Clinical ... GI. uterine) Laboratory ... 2B) • Normal PT ... INR • Normal aPTT ... VonWillebrand #Disease #Diagnosis
Bleeding and Bruising - Disorders of Hemostasis - Differential Diagnosis Framework

== Quantitative or Qualitative defect in
- Differential Diagnosis ... inhibitor of a coagulation ... intravascular coagulation ... warfarin, direct thrombin ... #Differential #Diagnosis
This 24M presented with acute onset CP/SOB, hypoxia, HR 150s. What's the diagnosis? Treatment options? Hint:
What's the diagnosis ... Thrombus in transit ... Pt had extensive ... #Clinical #POCUS ... Echocardiogram #A4C