FACTOR XIII ACTIVITY (QUALITATIVE) - UREA CLOT LYSIS TEST

The FACTOR XIII ACTIVITY (QUALITATIVE) – UREA CLOT LYSIS TEST is a specialized coagulation test used to evaluate the function of Factor XIII, an essential protein responsible for stabilizing blood clots.

Unlike other clotting factors that form the initial clot, Factor XIII works at the final stage of coagulation by cross-linking fibrin strands, making the clot strong and stable. Without proper Factor XIII activity, clots are weak and break down easily, leading to delayed bleeding, poor wound healing, and recurrent bleeding episodes.

The urea clot lysis test is a simple qualitative screening method where a formed clot is exposed to urea solution. If the clot dissolves, it indicates Factor XIII deficiency.

Benefits of the Test

• Detects rare Factor XIII deficiency
• Helps diagnose unexplained bleeding disorders
• Evaluates recurrent miscarriage cases
• Identifies poor wound healing causes
• Assesses clot stability defects
• Supports advanced hematology diagnosis

Why Doctors Recommend This Test

Doctors recommend this test when patients have normal routine coagulation tests (PT, INR, APTT) but still experience unexplained bleeding. It is especially important in cases of:

• Delayed post-surgical bleeding
• Recurrent spontaneous bleeding
• Repeated pregnancy loss
• Poor wound healing
• Family history of rare bleeding disorders

Since Factor XIII deficiency does not affect standard coagulation tests, this specialized test is essential for accurate diagnosis.

Preparation Before Test

• No fasting required
• Inform doctor about bleeding history
• Share history of miscarriages or delayed healing
• No special medication restrictions unless advised
• Blood sample collected under standard conditions

Normal Reporting Time

Results are usually available within 24 to 72 hours, depending on laboratory setup and test method.

Who Should Take This Test

• Patients with unexplained bleeding episodes
• Individuals with normal PT/APTT but bleeding symptoms
• Women with recurrent miscarriages
• Patients with delayed wound healing
• Suspected rare coagulation disorders
• Hematology referral cases