These are the results of the crossmatch that was being performed in the transfusion service laboratory while the patient was receiving the two units of O Rh-negative RBCs.
|Donor 3 ||3+|
|Donor 4 ||3+|
* IAT = indirect antiglobulin test
** O Rh-negative RBC (Donors 3 - 6 are O Rh-positive)