Rh-positive Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Rh-positive and links to relevant pages within the course.
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| Which of the following set of conditions would preclude HDN as a result of Rh incompatibility: | View Page |
| Crossmatch Results 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. Cells Gel IAT* Donor I** 2+ Donor 2** 2+ Donor 3 3+ Donor 4 3+ Donor 5 2+ Donor 6 3+ * IAT = indirect antiglobulin test ** O Rh-negative RBC (Donors 3 - 6 are O Rh-positive) | View Page |
| Antigen phenotyping results The patient's pretransfusion red cells and all donor red cells involved in the case (two group O Rh-negative RBC and four group O Rh-positive red cells initially crossmatched) were phenotyped for Jka.As expected, the patient typed as Jk(a-). The six donor RBC that were incompatible in the initial crossmatch were Jk(a+).The frequency of the Jka gene in Caucasians is ~77%, with most Caucasian red cells (50%) typing as Jk(a+b+). | View Page |