Based on recent cases of rare phenotypes in the Rh system, we will proactively detect such patients and donors most likely for this.
Extended Rh (C, c, E, e) and Kell (K1) typing should be done on all donors and patients meeting the any of the following criteria:
- D-negative phenotype
- Patients with positive antibody screens
Standards for Blood Banks and Transfusion Services, AABB, Current Edition, Bethesda, MD, USA