noelrbrown

Can you explain further the potency statement "doing a potency this potency vary from 1:4 to 1:128." Do you mean with a AHG containing anti Complement?

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Hemo bioscience (USA) also sells the DTT ready to use (frozen) but I understand it is a long way from Portugal

Sounds like poor advice from the IRL, I think what they meant to say was that the CD38 antigen is weakly expressed on Cord cells. The Kell system is completely removed by DTT treatment so you should give K neg blood as you have no way to exclude anti K, BTW that also means JSa, Jsb, Cellano etc. also Lu null cells do not express CD38 either.

yes it is, Hemo bio sells it frozen ready to use and you can buy it powdered from other vendors. Noel

Unfortunately the answer is, it depends... If the anti CD47 is a human antibody, then it will cause a positive DAT as CD47 is expressed on most cells in the body including erythrocytes. If the anti CD47 is mouse or goat then it will not as this antibody will bind to CD47 but will not cause the same interference we see with Daratumamab. I believe recent therapies involve blocking some of the CD47 receptors.

Hemo bioscience is selling ready to use DTT ( frozen), see our web site for details.

Be careful as the diluents used to suspend the cells will be different. For gel card assays you need a Low Ionic strength diluent. Diluents often contain potentiators and will have been validated for use in the appropriate card system. I am not saying they won't work and they probably will however you should perform validation to ensure you don't miss a significant antibody.

Hemo bioscience is going to be launching ready for use DTT in the next 2-3 weeks. We plan on pushing it through our email list and will update our web site with product codes.

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No greater than 20% HCT is my advice

CAP has a program called ABT which is antibody titre and includes IgM and IgG anti A as well as Anti D titres. if you download CAP's catalog you can see the program. Additinally API has a program that does the same thing www.api-pt.com For a method there is a method in the AABB technical manual as well as the uniform method which Dr. Auberchon authored. I believe there is a thread on pathlabtalk talking about the CAP ABT proficiency test.

Thank you all for your responses!

Thanks for the response tbostock!

Kholshoe- Not sure if this will be helpful or not but we (Hemo bioscience) have a line of Educational Reagents (simulated patient plasma) traditionally used in MT/CLS programs that I know have been purchased in the past for that very component of competency assessment. If you'd like any info on those, please let me know! Good luck with your Competency Assessment! I am attending a webinar on CLIA and its latest changes next week mainly out of curiosity. Quite the process! Whoa! Adele