angelmed Posted July 22, 2008 Share Posted July 22, 2008 Hello, This is our first post and we would like to say hello. Angel Med is not just one person but several of us who have been viewing the forums for a few months now. We have found it very helpful and would like to thank you all for allowing us to quietly view. A little about us. We are a small hospital in North Carolina approximately 55 beds with a small blood bank. Now we have a question for you guys in the know. The AABB standards state that a weak D is unnecessary when testing the patient. It also states that a weak D is not necessary when retyping the units. My question is: When crossmatching blood for an Rh negative patient, should the weak D be included on the units before transfusion? Link to comment Share on other sites More sharing options...
David Saikin Posted July 22, 2008 Share Posted July 22, 2008 No - weak D on units is performed by the blood supplier. You verify D= upon receipt/retype. No need to recheck weak D. Link to comment Share on other sites More sharing options...
Cliff Posted July 22, 2008 Share Posted July 22, 2008 Welcome all of angelmed, and like David said. Link to comment Share on other sites More sharing options...
Liz Posted July 24, 2008 Share Posted July 24, 2008 We have our own donor center at our Blood Bank. We check all negative donors immediately for weak D. We don't have a supplier in the whole country.Welcome to this great place!!!Liz Link to comment Share on other sites More sharing options...
LaraT23 Posted July 24, 2008 Share Posted July 24, 2008 The reasoning is this: Any weak D units must be considered positive for RH as there is a slight possibility of the recipient making antibody to even a portion of the D antigen, if it was given to an RH negative recipient. For the same reason, Baby cords are testing for weak D and the mother is given Rhogam even in those cases. Link to comment Share on other sites More sharing options...
Liz Posted July 25, 2008 Share Posted July 25, 2008 Yes that is what we do.We are a teaching institution, so we also run it on the patients at times for the students. Of course patients Du are documented as negative.It then becomes an exam question for them.Liz Link to comment Share on other sites More sharing options...
irshadaad Posted August 9, 2009 Share Posted August 9, 2009 never should a weak D considered to be chosen for Rh NEG pt....it has every chance to produce antibodies ,we test all negative donors with RhD(vi+) cards Link to comment Share on other sites More sharing options...
ckcheng Posted October 13, 2009 Share Posted October 13, 2009 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 KongOct 13, 2009 Link to comment Share on other sites More sharing options...
Liz Posted October 14, 2009 Share Posted October 14, 2009 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 KongOct 13, 2009Weak D MUST be performed on Donor blood. Link to comment Share on other sites More sharing options...
Malcolm Needs ☆ Posted October 14, 2009 Share Posted October 14, 2009 Weak D MUST be performed on Donor blood.I agree entirely with you Liz. Link to comment Share on other sites More sharing options...
ckcheng Posted October 14, 2009 Share Posted October 14, 2009 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 Link to comment Share on other sites More sharing options...
Malcolm Needs ☆ Posted October 14, 2009 Share Posted October 14, 2009 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, 2009Yes, with those provisos, I agree with you. Link to comment Share on other sites More sharing options...
Bill Posted October 15, 2009 Share Posted October 15, 2009 Weak D testing of donor blood BY A HOSPITAL who receives blood from outside source (actually a retype) is not necessary Link to comment Share on other sites More sharing options...
jcdayaz Posted December 20, 2009 Share Posted December 20, 2009 My understanding is that donor facilities are required to do weak D testing on blood units. Hospitals are not. If the donor facility detects a weak D the unit is considered Rh positive and labeled as such. The only circumstance in which we perform weak D testing is on an Rh negative infant (usually cord blood) of an Rh negative mother. This is to verify whether or not Rhogam is needed. Link to comment Share on other sites More sharing options...
PaulSunV Posted December 24, 2009 Share Posted December 24, 2009 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 KongOct 13, 2009I believe that it is necessary to read the entire post as opposed to the last sentence. When I read this post I assumed that the reference to a transfusion hospital meant that they are not a donor center. Therefore the weak D testing is not needed when verifying the donor blood type. Link to comment Share on other sites More sharing options...
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