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ckcheng

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Everything posted by ckcheng

  1. ckcheng
    Routinely perform weak D test on (1) before labelling a unit of blood as Rh-negative, and (2) cord blood sample if mom is a candidate of RhoGam injection. Of couse when indicated in antibody workup. Hope that helps. CK Cheng, MSc, SBB(ASCP), CQA(ASQ)
  2. ckcheng
    Malcolm, you are right, that is the disadvantage of transfusing major mismatch platelet , it will not survive good. In pediatric case, however, if you transfuse incompatible plasma to the tiny baby, transfused platelet will survive better BUT patient red cells will become DAT positive. You have to weigh it - major or minor mismatch?? Transfuse with caution in baby less than 1 year old and those premature ones with very low birth weight. Always give group specific platelet whenever possible, otherwise, consider the plasma compatiblilty to patient red cells. CK Cheng, MSc, SBB(ASCP), CQA(ASQ)
  3. ckcheng
    There are several ways to do it. Read MsDuffy's post to see if you are already qualified to take the SBB(ASCP) exam. If the answer is yes, then you can (1) do it by yourself, or (2) join a review course (gulf coast regional blood center or Volaris) before the exam, or (3) join an on-line review program (George Washington Univ). If the answer if no, then I am afraid you need to go to an SBB school (either on-line or on-site). It takes one to two years. Also, I suggest you go to the AABB Meeting to attend the lecture BB/SBB Examination Review: Where Do I Begin? A nice presentation to give you information how to prepare the SBB exam. Hope that helps. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Oct 15
  4. ckcheng
    I do not see there is any advantage of the 'hold' order in term of patient care unless you don't wanna burden your workload. Type and screen should be done on all samples send to blood bank (of course those are potentially need blood during or after the procedures). Advantages are keeping blood group and antibody screen results as a record, and resolve problems if find during the testing. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Oct 15
  5. ckcheng
    There are several things needed to consider when transfusing platelet. (1) Platelet possess A and B antigens, but lacks D antigen. Major mistmatch shortens platelet survival. (2) Anti-A and/or anti-B present in donor plasma. Minor mismatch causes red cells DAT positive (3) Major mismatch vs minor mismatch if group specific platelet is not avalible. (4) Purpose of the transfusion. OT bleeding patients or hematological patients for prophalaxis. (5) age of the recipient, pay extra caution if it is a pediatric patient cuz small blood volume. When group specific platelet is not available for neonatal, I will give group AB platelet. I agreed with the practice of vilma_mt. Also, there is an article you may find interesting. Apperesis platelet transfusions: does ABO matter? Jay H Herman, & Karen E King. Transfusion, Vol 44, Issue 6, June 2004, Page 802-4 Hope that helps. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Oct 14, 2010
  6. ckcheng
    Hi Malcolm, sounds great cuz the Technical Manual is quite expensive. I started to buy every edition since I started my SBB program. I have three at home now, haha. There are lots nice books that you are right, you can not have everythings in the world. Take care. Thanks. Chun-kwok Oct 5
  7. ckcheng
    (1) One has no transfusion within the past three months does not mean he/she is DAT negative. So a negative control in typing is important especially when you are using IAT technique. (2) Monoclonal antisera, like anti-E, -e, -C, -c, -Jka, -Jkb, -S, etc, has the advantage of that you can type patient whose red cells are DAT positive cuz only direct agglutination step, no IAT is required. (3) agree that follow manufacturer's instruction is important. By the way - hi Malcolm, you bought a copy of Technical Manual ?! CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Oct 5, 2010
  8. ckcheng
    Autocontrol is not necessary when performing antibody screen in pretransfusion testing. However, it is very useful in antibody workup. Put up a DAT when autocontrol is positive. Hope that helps. CK Cheng, MSc, SBB(ASCP), CQA(ASQ)
  9. ckcheng
    Agreed with David's comments. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Apr 13, 2010
  10. ckcheng
    ABm, or ABel without anti-B - check B sbustance in saliva if patient is a secretor in case of ABm, or perform elution study in case of ABel. AB patient transplanted with A donor sucessfully - check medical history. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Mar 17, 2010
  11. ckcheng
    Yes, I agreed with AMcCord, you may prepare the 0.8% red cells for gel test from 3% red cells using the diluent provided by the manufacturer, like ID-2, but not the other way round. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Mar 9, 2010
  12. ckcheng
    All components must be administered thru filter (standard 170- to 260-micron) designed to remove blood clots and particles potentially harmful to the patients. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Mar 9, 2010
  13. ckcheng
    It is not recommneded to convert the 0.8% red cells for gel test to 3% red cells for tube test. You may purchase another set of 3% for tube test or prepare it by yourself using donor blood. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Mar 9, 2010
  14. ckcheng
    Have a look at this article in Transfusion Harris SB, Josephson CD, Kost CB, et al. Nonfatal intravascular hemolysis in a pediatric patient after transfusion a platelet unit with high-titer anti-A. Transfusion 2007;47:1412-7. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Hong Kong Mar 3, 2010
  15. ckcheng
    Hi CrystalM, the third edition of Passing the First Time: Blood Bank Exam Review Guide was published in 2007. Sounds the fourth edition is coming later this year. You can order the book directly from Volaris Systems & Consulting Inc. Here is the path: http://www.volarisconsulting.com/guide.html I totally agree with TeachBB's comments on the Last Chance Review by Gulf Coast Regional Blood Center. It is a two-day workshop. Organized once a year. The coming one is on Feb 20-21, 2010. Please click this path for further information: http://www.giveblood.org/uploads/pdf/education/2010Brochure.pdf Hope that helps. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Jan 6, 2010
  16. ckcheng
    Yes, I agree that the patient was A2 with anti-A1. If the anti-A1 is not reactive at 37C, transfuse the patient with group A red cells if your hospital uses computer crossmatch. However, if the anti-A1 is reactive at 37C (not common) and/or your hospital uses abbreviated crossmatch (perform IS to countercheck ABO group), then give group O cells to the patient. Hope that helps. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Dec 29, 2009
  17. ckcheng
    Me too - just wanna wish all you guys in the Bloodbank Talk a Merry Christmas, Happy New Year, and have a wonderful 2010 to come Chun-kwok Cheng, MSc, SBB(ASCP), CQA(ASQ) Hong Kong Dec 24, 2009
  18. ckcheng
    Just wanna say Mr Malcolm Needs is very generous and helpful in sharing his blood bank knowledge with us. Hope you guys out there in the BloodBank Talk agree with me. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Hong Kong Nov 3, 2009
  19. ckcheng
    Hi Liliana, have you any friends or co-workers came back from the Meeting in New Orleans, or Canada last years? The one I think useful has about hundred pages. Alternatively, attend the 2-day Last Chance Review in Gulf Coast Regional Blood Center, or if it does not allow you to fly to Houston, you may buy notes from Clare. Hope that helps. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Hong Kong Nov 3, 2009
  20. ckcheng
    Hi Terri, did you go to the AABB Meeting? Did you attend the lecture BB/SBB Examination Review: Where Do I Begin? A nice presentation to guide you how to prepare the SBB exam. Rememeber, in addition to blood banking stuff, you also need to know math, management, hematology, coagulation, etc. Also, if time and bugget allow, go to the Last Chance Review which is organized by the Gulf Coast Regional Blood Center before you take the exam. They also sell notes after the Review every year if you are unable to attend it. Good luck and plan well before you start. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Hong Kong Oct 31, 2009
  21. ckcheng
    Congratulations filam! Sure you worked really hard cuz passing the SBB exam in the first attempt is not easy. Congratulations! CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Hong Kong Oct 30, 2009
  22. ckcheng
    If you are working in a transfusion hospital, weak D test on Rh-negative donor blood is not necessary cuz already done in Blood Center before labeled as [Rh Negative]. Of course individual hospital or transfusion center may choose to do it. Follow your institute's SOP. However, if you are working in a Blood Center or Donor Center, weak D test must be done before the unit labeled as [Rh Negative]. Hope that helps. CK Cheng, MSc, SBB(ASCP), CQA(ASQ) Oct 14, 2009
  23. ckcheng
    Angelmed, are you working in a transfusion hospital? If the answer is yes, then weak D test only perform on baby cord blood to determine Rh negative mom need further RhoGam injection after the baby is born. Perform weak D test on donor blood is not necessary. Hope that helps. CK Cheng, MSc, SBB(ASCP), CQS(ASQ) Hong Kong Oct 13, 2009
  24. ckcheng
    Hi filam, I saw you also post a comment under another SBB heading. Seems you are really afraid of not passing in the first time. Remember, no one will gaurantee you 100% pass even if you take an SBB program . Have you joined any regular or review type SBB program? Since you have only 1week's time before your exam, do not give yourself too much pressure cuz it will affect your performance. Jot down as many questions as you can right after your exam, it helps IN CASE, I said in case you fail in the first time. Take it easy! Chun-kwok Cheng, MSc, SBB(ASCP), CQA(ASQ) Oct 10, 2009
  25. ckcheng
    Hi Brenda, I am also interested in how to train blood bank techs. Can you send me copies also? My email is: chengchunkwok@yahoo.com Thanks. CK Cheng
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