Question 1

Purpose Test

Accepted Answer

Diagnosis of Hemophilia A (Factor VIII deficiency) and determination of its severity (mild, moderate, severe) based on the percentage of remaining activity. Distinguishing Hemophilia A from other clotting disorders, especially von Willebrand disease, when there is a family history or bleeding symptoms. Monitoring the effectiveness of replacement therapy with concentrated Factor VIII or newer treatments (e.g., Emicizumab) in known patients, and ensuring that therapeutic levels are reached. Evaluating the cause of prolonged activated partial thromboplastin time (aPTT) in routine coagulation tests.

Question 2

Recommended groups

Accepted Answer

Male children (0-12 years): Especially when signs of abnormal bleeding appear (such as large bruises, joint swelling, prolonged bleeding after circumcision) or when there is a strong family history of Hemophilia A. Adolescents and men: Who have been previously diagnosed with Hemophilia A, for routine follow-up and assessment of the adequacy of prophylactic treatment or when preparing for surgery. Female carriers (Carriers): Testing may be requested to assess their Factor VIII levels, as some carriers may have low levels and experience mild bleeding symptoms. Chronic patients: Those with Hemophilia A who need ongoing monitoring before surgeries, after bleeding events, or as part of routine care.

Question 3

Symptoms indicative

Accepted Answer

Family history of Hemophilia A or undiagnosed bleeding disorders. Easy bruising and deep bruises, or bleeding under the skin with minor trauma. Frequent or prolonged bleeding from small cuts, or after tooth extraction or any surgical procedure. Spontaneous bleeding within joints (knees, elbows, ankles) causing pain, swelling, and stiffness. Frequent or severe nosebleeds (epistaxis) that are hard to stop. Abnormal results in the activated partial thromboplastin time (aPTT) test.

Question 4

Frequently Asked Questions (FAQs)

Accepted Answer

What is the difference between Hemophilia A and von Willebrand disease? Hemophilia A is a deficiency in Factor VIII only and is X-linked (mostly affecting males). Von Willebrand disease is a deficiency or dysfunction in von Willebrand factor, which carries and stabilizes Factor VIII and helps platelets adhere. Symptoms of von Willebrand disease are usually milder and affect both genders equally. It may present with bleeding from mucosal surfaces (nose, gums, heavy menstrual bleeding). How is the Factor VIII activity result interpreted? The result is given as a percentage of normal activity (around 100%). Normal: 50-150% Mild Hemophilia: 6-49% (bleeding usually after major trauma or surgery). Moderate Hemophilia: 1-5% (bleeding after minor trauma, occasional spontaneous bleeding). Severe Hemophilia:

Question 5

Normal Levels

Accepted Answer

6% - 49%: Mild Hemophilia A 1% - 5%: Moderate Hemophilia A Less than 1%: Severe Hemophilia A

Monitor Factor VIII Clotting - Factor VIII:C Coagulation Activity Test