14 results
How to Evaluate an Abnormal APTT
Step 1: Is the PT or APTT Artifactually Prolonged?
Step 2: Is
Step 1: Is the PT ... Is a Systemic Disease ... Prolonging the PT ... to identify the cause ... #prolonged #diagnosis
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
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
PT and/or aPTT ... Prothrombin Time (PT ... Early liver disease ... typically prolong PT ... #Causes #diagnosis
Von Willebrand Disease - Most common inherited bleeding disorder 
Clinical 
 • Easy bruising 
 •
Von Willebrand Disease ... GI. uterine) Laboratory ... 2B) • Normal PT ... INR • Normal aPTT ... #Diagnosis #Hematology
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
Bleeding and Bruising - Disorders of Hemostasis - Differential Diagnosis Framework

== Quantitative or Qualitative defect in
/ABNORMAL PTT: ... Perform a PTT mixing ... /NORMAL PTT: Suggests ... /ABNORMAL PTT: ... discern these causes
Causes of Thrombocytopenia and Platelet Disorders - Differential Diagnosis and Workup
History:
 - Prior platelet count, family
- Differential Diagnosis ... : INR/PT, aPTT(liver ... disease, decrease ... bypass), LFT (liver disease ... #Differential #Diagnosis
Hemophilia - Diagnosis and Management
Diagnosis:
 • Consistent bleeding history (unless screening for disease in family members
and Management ... ) • aPTT is prolonged ... mixing study (aPTT ... normal in mild cases ... ) • PT/INR & von
TTP - Laboratory Evaluation for Thrombotic Thrombocytopenic Purpura

Activity of von Willebrand factor-cleaving protease activity - A
TTP - Laboratory ... activity is the diagnostic ... hallmark for the disease ... be performed PT ... , PTT, and fibrinogen
Graves Disease - Autoimmune Hyperthyroidism
Epidemiology: Most common cause of hyperthyroidism, Incidence peaks at 30-50
Diagnosis: 
1 )
Graves Disease - ... Epidemiology: Most common cause ... peaks at 30-50 Diagnosis ... • Methimazole/PTU ... #management #endocrinology