1486 results
How to Evaluate an Abnormal APTT
Step 1: Is the PT or APTT Artifactually Prolonged?
Step 2: Is
Evaluate an Abnormal APTT ... : Is the PT or APTT ... K Antagonists, Heparin ... cause of Prolonged APTT ... prolonged #diagnosis #hematology
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
Abnormal PT and/or aPTT ... unfractionated heparin ... cause e.g. heparin ... thrombin inhibitors, heparin ... #differential #hematology
Approach to Thrombotic Microangiopathy (TMA) - Differential Diagnosis and Management Algorithm

Suspected TMA: Unexplained thrombocytopenia + MAHA
hemoglobin/hemosiderin, Hepatic ... antiglobulin test, PT/aPTT ... hemosiderin • PT/aPTT ... Management #Algorithm #hematology
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
Prolonged PT and aPTT ... the PT and the aPTT ... Pre-analytical cause (e.g. heparin ... thrombin inhibitors, heparin ... #differential #hematology
Disseminated Intravascular Coagulation (DIC) Overview

Increased Clotting and Consumption of Clotting Factors

Findings:
 • Bleeding
 • Recent history
dysfunction (25%) • Hepatic ... deficiency) • HIT: Heparin-PF4 ... 100mg/dL) - Heparin ... INR < 2.3 - APTT ... treatment #management #hematology
Approach to Elevated aPTT / PT - Differential Diagnosis Algorithm

aPTT: Intrinsic / Final
PT: Extrinsic / Final

By
Approach to Elevated aPTT ... Diagnosis Algorithm aPTT ... #Elevated #aPTT ... INR #Algorithm #Hematology
Algorithm for Investigation of Abnormal Coagulation Tests
- Prolonged PT
- Prolonged aPTT and Prolonged PT
- Prolonged aPTT

Dr.
PT - Prolonged aPTT ... PT - Prolonged aPTT ... Coagulation #Abnormal #APTT ... #Laboratory #Hematology
Prolonged APTT - Diagnostic Algorithm

#Prolonged #APTT #PTT #abnormal #Diagnosis #Algorithm #hematology
Prolonged APTT - ... #Prolonged #APTT ... #PTT #abnormal ... Diagnosis #Algorithm #hematology
Prothrombin Time (PT) and Partial Thromboplastin Time (PTT)

Prothrombin Time (PT) - Often Elevated in:
 • Vitamin
Thromboplastin Time (PTT ... Thromboplastin Time (PTT ... elevated in: • Heparin ... thematttsai #PT #PTT ... Thromboplastin #laboratory #hematology
Heparin Induced Thrombocytopenia (HIT) - Likelihood, Diagnosis and Management
 - HIT Suspected
 - Calculate 4T Score
Heparin Induced ... - Start/Stop Heparin ... Results #HIT #Heparin ... Diagnosis #Management #Hematology