Glossary DAT Abbreviation for “Direct Antiglobulin Test.” Sometimes people say it as if it is a word, but most blood bankers speak it letter by letter instead (“D-A-T”). Back to Glossary List Transfusion News is brought to you by Stored RBCs May Have Slower Oxygen Unloading for Tissue Recombinant Erythropoietin for Patients with Autoimmune Hemolytic Anemia National Surveillance for Unknown Transfusion-Transmitted Infections Whole Blood Transfusions Early Improve Survival for Trauma Patients Strategies for Blood Deserts Visit Transfusion News » Follows Facebook 13.6k Followers