[Solved]: A Crossmatch request for 4 units of red cells was…

A Crossmatch request for 4 units of red cells was received on a previously transfused patient. Her last transfusion was one week ago. During pre-admission testing her antibody screening (ABS) test and direct antiglobulin test (DAT) were both negative. She was admitted for surgery and received 7 units of RCs in the O.R.; 4 units were ABO specific and 3 were ABO Compatible. The results of her current sample (7 days post transfusion) are as follows: Patient’s red cells against: Patient’s plasma against: Anti-A Anti- B Anti- A,B Anti- D Rh Control DAT PS A1 Cells B Cells O Cells 4+mf 0 4+mf 3+ 0 2+ 0 3+ 0 Screening Cells Lot#43957 Room Temperature LISS 37 IAT* Enzyme IAT Screen cell I (R1R1) 0 0 1+ 2+ Screen cell II (R2R2) 0 0 0 0 Screen cell III (rr) 0 0 1+ 0 Auto control 0 1+mf 1+mf NT *IAT = indirect antiglobulin test mf= mixed field NT = not tested 1. What is this Patient’s blood group most likely to be? Can you explain the mf finding? (2pts) 2. What information in the patient’s history is relevant and helps explain the unexpected lab findings? (2pts) 3. What antibody(ies) appear to be present in the plasma of this patient? (1pt) a. anti-B plus an irregular/unexpected antibody(ies) b. no irregular/unexpected antibodies c. anti-A plus irregular/unexpected antibody d. anti-B plus anti-D