Posts - Specimen Management

Jan 11, 2021 4:05pm
From Ann Helen: Can you trust results of PTT and factor VIII in umbilical cord blood? It seems as if it is usual to draw umbilical cord blood from newborns when the mother is a known carrier of Hemophilia A. Can you trust a high APTT and a low factor VIII in such a sample? Kind regards.
Jan 10, 2021 8:04pm
Friend and Colleague Dennis Ernst, Center for Phlebotomy Education, shared this January 8, 2021 question with George: Hello Phlebotomy Today, We’ve come across a patient whose platelets clumped in EDTA and citrate tubes. We understand that ammonium oxalate may be used to provide an accurate platelet count. Do you know of a manufacturer of these tubes? Thanks very much. Cynthia.Gerger-Salakar, MPM, MT [ASCP], Quality Coordinator.
1 Comment
Sep 2, 2020 8:46am
Hi, I used to work in special coag at VCU, it was over 10 years ago. When we were freezing specimens we had to double spin them at 3500 rpm for 15 minutes. Our quick-spin centrifuges for PT/PTT could cause the platelets to leak out their activation factors. Where I now work, we called Mayo and UVA who claim to have never heard of this. I only process for send outs occasionally but when I do I cannot bring myself to use the quick centrifuges since I was trained differently, however, if this is an outdated practice, I can change but I don't want to do so without verification from someone I trust. Thank you, Anne.