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Malcolm Needs

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Malcolm Needs last won the day on February 16

Malcolm Needs had the most liked content!

About Malcolm Needs

  • Rank
    Seasoned poster
  • Birthday 12/14/1954

Profile Information

  • Gender
  • Interests
    Rugby Union, Cricket, cooking, wine, port, reading, crosswords, lecturing, more wine and more port!
  • Biography
    Pretty boring really, but not that pretty!
  • Location
    Croydon, Surrey, England
  • Occupation
    I have taken a brand new role in the NHSBT and am now involved very much more on the education and training side of red cell immunohaematology. My title is still Reference Service Manager, but with Training after it (Reference Service Manager - Training). I am very excited about this change, as I have a passion for training and education.
    Reference Service Manager with the NHSBT.
    Chartered Scientist.
    Member of the British Blood Transfusion Society, having twice served on their National Council.
    Fellow of the Institute of Biomedical Science. Member of their Special Advisory Panel for Transfusion Science and Chief Examiner for Transfusion Science for the Institute.
    Author of the chapter "Human erythrocyte antigens or blood groups" in Fundamentals of Biomedical Science, Transfusion and Transplantation Science, edited by Robin Knight, for the IBMS. 1st edition, Oxford University Press 2013 (ISBN 978-0-19-953328-2, pages 19-44.
    Just been appointed to the BCSH Blood Transfusion Task Force (writing Guidelines).
    Member of ISBT and AABB.
    I am now retired from the Blood Service, but still do the other things!
    Got bored with being retired, and so am doing locum work in Blood Transfusion at St. Richard's Hospital in Chichester, West Sussex (and thoroughly enjoying myself!).

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  1. Malcolm Needs

    Welcome MR A NAIF SAAD M

    Welcome MR A NAIF SAAD M.
  2. Malcolm Needs

    Welcome Megan

    Welcome Megan.
  3. Malcolm Needs

    Welcome NicoleF

    Welcome NicoleF.
  4. Malcolm Needs

    Welcome NotafanofBB

    Welcome NotafanofBB.
  5. Malcolm Needs

    Welcome marcos

    Welcome marcos.
  6. Malcolm Needs

    When is Rhesus D positive in test tubes?

    There are one or two comments I would make, which you may find pedantic, but, that notwithstanding, they are true. There is, and never has been, a blood group system named Rhesus. Rhesus was an ancient king of Thrace. The correct name for the blood group system is Rh. So, it is the Rh Blood Group System, the two genes involved are RHD and RHCE, the carrier proteins are RhD and RHCcEe, but the antigen of which you are talking is just plain D, and not Rh D. There is a very good reason why the instructions that come with the anti-D state that the tests should be read macroscopically. Thorpe et al, in two papers, reported that monoclonal anti-D molecules possess a V4-34 moiety, that is also present in anti-I and anti-i. As a result, if papain-treated D- red cells are tested with such antisera, or untreated D- red cells are tested with such antisera that have not been brought to room temperature, they may agglutinate. This could result in D- red cells being mistyped as D+ - a particular danger in females of child-bearing potential, and babies (Thorpe SJ, Boult CE, Stevenson FK, Scott ML, Sutherland J, Spellerberg MB, Natvig JB, Thompson KM. Cold agglutinin activity is common among human monoclonal IgM Rh system antibodies using the V4-34 heavy chain variable gene segment. Transfusion 1997; 37: 1111-1116, and Thorpe SJ, Ball C, Fox B, Thompson KM, Thorpe R, Bristow A. Anti-D and anti-i activities are inseparable in V4-34-encoded monoclonal anti-D: the same framework 1 residues are required for both activities. Transfusion 2008; 48: 930-940). In addition, if you do not follow the manufacturer's instruction, and something goes wrong, under UK (and EU) Law, you could well be liable, as described by Bob Doughty some 30 years ago now (Doughty RW. Product liability in the medical laboratory. Medical Laboratory Sciences 1989; 46: 68-71. In the case that you describe, do you know the Weak D type of the baby (it may well be Weak D Type 2, which can be particularly weak) and, at any time, did you test the mother's red cells to see if she was also a Weak D of the same type? If she was, then it is highly likely that anti-D immunoglobulin would not have been required anyway, although I am aware that this is not part of the BSH Guideline (White J, Qureshi H, Massey E, Needs M, Byrne G, Daniels G, Allard S and British Committee for Standards in Haematology. Guidelines for blood grouping and red cell antibody testing in pregnancy. Transfusion Medicine 2016; 26: 246-263. doi: 10.1111/tme.12299). My honest advice is that you do not read the tests under a microscope. If you have ANY doubt, give the mother anti-D immunoglobulin anyway - it is not that expensive, and has a good safety record in terms of TTI. .
  7. Malcolm Needs

    ABO diacrepancy

    The change in the level of HbF, in itself, shows haematopoietic stress, and haemopoietic stress can lead to weakened expression of ABO antigens.
  8. Malcolm Needs


    I have sent you a Private Message, which may or may not help.
  9. Malcolm Needs

    Welcome Ben

    Welcome Ben.
  10. Malcolm Needs

    Welcome Cgore

    Welcome Cgore.
  11. Malcolm Needs

    RHIG orders

    Agreed, and you are also in a position to argue with them (slightly, and politely).
  12. Malcolm Needs

    Welcome Ckalemba

    Welcome Ckalemba.
  13. Malcolm Needs

    Welcome Sanguine

    Welcome Sanguine.
  14. Malcolm Needs

    Welcome Abbey

    Welcome Abbey.
  15. Malcolm Needs

    Welcome MABBoccia

    Welcome MABBoccia.

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