Newcastle Laboratories

Molecular Genotype

Clinical Background:

Blood group genotype testing for multitransfused, DAT positive patients or patients receiving targetted therapy with monoclonal antibodies when serological phenotyping cannot be performed. The geno...

Blood group genotype testing for multitransfused, DAT positive patients or patients receiving targetted therapy with monoclonal antibodies when serological phenotyping cannot be performed. The genotype can be used to predict blood group phenotype.
Molecular genotyping allows the determination of RhD, C, c, E, e, Cw, M/N, S/s, Kk, Jka/b, Fya/b, Doa/b, U-, Uvar and more.

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Test Details

  • Discipline:

    Transfusion

    Transfusion

  • Specimen Container Adult:

    6mL K2 EDTA (pink top)

    6mL K2 EDTA (pink top)

  • Specimen Container Paediatric:

    1mL EDTA or 6mL EDTA

    1mL EDTA or 6mL EDTA

  • Minimum Volume Adult:

    6mL

    6mL

  • Minimum Volume Paediatric:

    1mL

    1mL

  • Special Requirement:

    Molecular genotyping cannot be ordered through PowerChart. Samples are referred to the regional reference centre by the Transfusion laboratory as part of ongoing investigations. 

    Molecular genotyping cannot be ordered through PowerChart. Samples are referred to the regional reference centre by the Transfusion laboratory as part of ongoing investigations. 

  • Sample Stability:

    Short term storage: 24 hours at room temperature. 

    Short term storage: 24 hours at room temperature. 

  • Transport Requirements:

    Sample should be transported to Laboratory Medicine Reception via GP courier, hospital air-tube system or hand delivered to maintain storage conditions. Samples must not be subjected to extreme hot...

    Sample should be transported to Laboratory Medicine Reception via GP courier, hospital air-tube system or hand delivered to maintain storage conditions. Samples must not be subjected to extreme hot or cold conditions prior to testing.

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  • Add On Test:

    N/A

    N/A

  • Interpretation:

    The molecular genotype report will state the blood group antigens identified through genetic analysis. 

    The molecular genotype report will state the blood group antigens identified through genetic analysis. 

  • Factors Affecting Result:

    Samples which are old (>24 hours). Incorrect specimen type received. Clotted, haemolysed, icteric or lipaemic samples. Insufficient plasma provided. 

    Samples which are old (>24 hours). Incorrect specimen type received. Clotted, haemolysed, icteric or lipaemic samples. Insufficient plasma provided. 

  • Other Info:

    This test is referred to NHSBT by the Transfusion laboratory.

    This test is referred to NHSBT by the Transfusion laboratory.

  • Routine Contact Name:

    FH Section Leads
    RVI Section Leads

  • Routine Telephone:

    Freeman: 0191 213 7849
    RVI: 0191 282 4335

    Freeman: 0191 213 7849
    RVI: 0191 282 4335

  • Specialist Test:

    Yes

    Yes

  • Specialist Contact Name:

    Transfusion manager

    Transfusion manager

  • Specialist Telephone:

    0192 213 9169

    0192 213 9169

Availability:

Routine core hours only. 

Turn Around:

Up to 10 business days for standard and extended genotyping
Within 12 weeks for extended genotyping with haemoglobinopathy array

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