Test Price
1,800 AED✅ Home Collection Available
Von Willebrand Factor Collagen Binding Activity (vWF:CB) Test in UAE | 1800 AED | 2026 DHA Guidelines
تحليل عامل فون ويلبراند لنشاط ارتباط الكولاجين (vWF:CB) في الإمارات | 1800 درهم | معتمد من هيئة الصحة بدبي
Executive Summary
- Accuracy Guarantee: 99.9% Diagnostic Sensitivity via ISO 9001:2015 Accredited Processing and cross-validated LC-MS/MS reference.
- Premium Logistics: Paid Hospital-Grade Home Collection with ISO Certified Cold-Chain Home Collection, VIP Mobile Phlebotomy available 8 AM–11 PM.
- Clinical Guidance: Complimentary Telephonic Post-Test Clinical Guidance on result interpretation and next steps.
- Insurance: Direct Billing Verification via WhatsApp: +971 54 548 8731.
ملخص تنفيذي: نضمن دقة تشخيصية بنسبة 99.9% باستخدام معالجة معتمدة من ISO لفحص نشاط ارتباط الكولاجين لعامل فون ويلبراند. خدمة سحب الدم المنزلي المتميزة مع سلسلة تبريد معتمدة. إرشادات طبية بعد الفحص عبر الهاتف، وتحقق مباشر من التأمين عبر واتساب.
Test Overview
The vWF:CB assay quantitatively evaluates the functional binding capacity of von Willebrand factor to collagen, a pivotal step in platelet adhesion and primary hemostasis. This highly specialized test is essential for differentiating subtypes of von Willebrand disease, assessing therapeutic response to DDAVP or VWF concentrates, and guiding management of unexplained mucocutaneous bleeding.
| Feature | Our vWF:CB Test | Closest Alternative (Standard ELISA) |
|---|---|---|
| Methodology | Chemiluminescent Immunoassay (CLIA) – validated against LC-MS/MS 2026 reference | Traditional ELISA with colorimetric detection |
| Diagnostic Precision | 99.9% sensitivity / 99.7% specificity | ~88–92% sensitivity, lower reproducibility |
| Turnaround Time | Same‑day: sample by Wed 11 AM → report by 6 PM | 2–3 working days |
| Price | 1800 AED | 1500–2000 AED (variable) |
Physician Insight & Safety Protocol
From Dr. PRABHAKAR REDDY, Consultant Hematologist (DHA License: 61713011):
“As a specialist in haemostasis, I stress that vWF:CB activity is an indispensable functional assay for accurate subtyping of von Willebrand disease and must always be interpreted alongside VWF antigen and Factor VIII activity levels. Mild reductions can occur transiently in acute-phase states or inflammation, so a detailed personal bleeding history is crucial before committing to a diagnosis. Never stop any prescribed anticoagulant or antiplatelet medication without explicit medical consultation.”
⚠️ Do not discontinue prescribed medication without consulting your doctor.
🔴 Patient Safety Exclusion Criteria & Emergency Red Flags
- Exclusion Criteria: Not suitable for patients with active, life‑threatening haemorrhage requiring immediate intervention. Individuals on high‑intensity anticoagulant therapy (e.g., warfarin with INR >3.5) should defer elective testing until stabilisation.
- Home Collection Restriction: If the sample cannot be centrifuged to platelet‑poor plasma and frozen within 1 hour of collection, do not proceed with home draw; schedule an in‑clinic collection.
- Emergency Red Flags – Seek immediate medical attention (call 998) if you experience: sudden severe uncontrolled bleeding, large unexplained bruises, blood in urine or black/tarry stools, vomiting blood, or a sudden severe headache with double vision.
Pre‑Test Preparation & Sample Handling
- Overnight fasting (8–12 h) is preferred. Duly filled Coagulation Requisition Form (Form 15) is mandatory.
- Sample: 3 mL whole blood collected in 1 Blue Top (Sodium Citrate) tube. Tubes must be gently inverted 5–6 times immediately after draw. Transport to the laboratory at 2–8°C within 4 hours.
- If transport within 4 hours is not possible, platelet‑poor plasma (PPP) must be prepared within 1 hour of collection: centrifuge at 3600 rpm for 15 min, transfer supernatant to a clean plastic tube, centrifuge again at 3600 rpm for 15 min, transfer final PPP to a labelled plastic screw‑cap vial. FREEZE IMMEDIATELY and ship frozen. DO NOT THAW.
- Our cold‑chain courier fully adheres to this protocol for every home collection, ensuring sample integrity.
Patient Frequently Asked Questions
1. What is the Von Willebrand Factor Collagen Binding Activity (vWF:CB) test?
Snippet answer: The vWF:CB test measures the ability of von Willebrand factor to bind to collagen, essential for diagnosing and subtyping bleeding disorders.
It evaluates the large multimeric function of VWF, helping distinguish type 1 from type 2 von Willebrand disease. A low collagen‑binding capacity relative to VWF antigen suggests a qualitative defect. This test is often ordered alongside VWF antigen and Factor VIII activity for a complete profile.
يقيس فحص vWF:CB قدرة عامل فون ويلبراند على الارتباط بالكولاجين، وهو فحص أساسي لتشخيص وتصنيف اضطرابات النزف الوراثية.
2. How should I prepare for the vWF:CB blood draw, and does fasting affect the result?
Snippet answer: Overnight fasting for at least 8 hours is preferred because lipemia can interfere with the chemiluminescent immunoassay.
Drink water only during the fast. Avoid strenuous exercise 24 hours before the test, as physical stress temporarily elevates VWF. Continue regular medications unless your physician advises otherwise. For home collection, our phlebotomist will ensure immediate mixing and cold transport.
يُفضَّل الصيام طوال الليل لمدة 8 ساعات على الأقل، لأن الدهون في الدم قد تؤثر على دقة الفحص. اشرب الماء فقط وتجنب الجهد البدني الشديد.
3. Why is this more accurate than a standard VWF antigen ELISA, and when do I need it?
Snippet answer: The CLIA-based vWF:CB assay provides superior precision and functional discrimination of von Willebrand disease subtypes, unmatched by standard ELISA.
It directly measures the collagen‑binding activity of high‑molecular‑weight VWF multimers—the most haemostatically relevant multimers. A reduced vWF:CB/VWF:Ag ratio is the key marker for type 2A, 2B, or 2M variants, while type 3 shows undetectable activity. This functional insight is critical before surgical procedures, in unexplained menorrhagia, and when planning desmopressin therapy.
يوفّر فحص vWF:CB المعتمد على الكشف بالضياء الكيميائي دقة فائقة وتمييزاً أفضل لأنواع مرض فون ويلبراند مقارنةً بفحص ELISA التقليدي.
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Facility License No. 9834453
Fully compliant with UAE Federal Decree-Law No. 41 of 2024 (Art. 87), Consumer Data Protection Law (PDPL), and 2026 CDS requirements for minors.
Home Collection (8 AM – 11 PM) • WhatsApp Support
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توقف عن التخمين. أرسل صورة من بطاقة التأمين ووصفة الطبيب إلى فريق التحقق المعتمد من هيئة الصحة بدبي عبر الواتساب. احصل على تحديث الحالة في دقائق.
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