Newcastle Laboratories

vW Factor Antigen

Clinical Background:

The quantitation of Von Willebrand Factor Antigen is required for the typing of von Willebrand disease. Type 2 vWD have a much lower antigen compared to function and this has implications for treat...

The quantitation of Von Willebrand Factor Antigen is required for the typing of von Willebrand disease. Type 2 vWD have a much lower antigen compared to function and this has implications for treatment and monitoring

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Test Details

  • Discipline:

    Haemostasis

    Haemostasis

  • Specimen Container Adult:

    Light blue - sodium citrate

    Light blue - sodium citrate

  • Specimen Container Paediatric:

    Light blue - sodium citrate

    Light blue - sodium citrate

  • Minimum Volume Adult:

    5.4mL

    5.4mL

  • Minimum Volume Paediatric:

    2.6mL

    2.6mL

  • Special Requirement:

    Tube must be correctly filled to line, to ensure correct ratio of blood to anticoagulant, ensure adequate mixing.

    Tube must be correctly filled to line, to ensure correct ratio of blood to anticoagulant, ensure adequate mixing.

  • Sample Stability:

    4 hrs

    4 hrs

  • Transport Requirements:

    Samples should be transported to lab without delay

    Samples should be transported to lab without delay

  • Freq Analysis:

    Continuous

    Continuous

  • Add On Test:

    All urgent add ons via telephone on 0191 28 24718, and must be confirmed via email to the appropriate email address

    tnu-tr.bloodsciencesadditions@nhs.net (internal)

    tnu-tr.bloodsciencesadditions@nh...

    All urgent add ons via telephone on 0191 28 24718, and must be confirmed via email to the appropriate email address

    tnu-tr.bloodsciencesadditions@nhs.net (internal)

    tnu-tr.bloodsciencesadditions@nhs.net (external)

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  • Quality Assurance:

    UK NEQAS Blood Coagulation

    UK NEQAS Blood Coagulation

  • Reference Ranges:

    40 - 150%

    40 - 150%

  • Other Info:

    Plasma von Willebrand factor concentration.

    Performed as part of a vW Screen.

    Plasma von Willebrand factor concentration.

    Performed as part of a vW Screen.

  • Routine Contact Name:

    Peter Strong

  • Routine Telephone:

    0191 282 0332

    0191 282 0332

  • Routine Email:

    p.strong@nhs.net

  • Specialist Test:

    Yes

    Yes

  • Specialist Contact Name:

    Haematology/Haemostasis Health care Scientist

    Haematology/Haemostasis Health care Scientist

  • Specialist Telephone:

    0191 213 9758

    0191 213 9758

Availability:

All testing performed at RVI Haematology laboratory and available during routine hours, Monday to Friday. Testing is usually performed on a weekly basis, depending on batch size availability.

Turn Around:

Usually within 7 days.

Send To:

Department of Blood Sciences

Level 3
Leazes Wing
Royal Victoria Infirmary
Queen Victoria Road
Newcastle upon Tyne
NE1 4LP

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