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|Panel 1 Example- Rule Outs|
Cells 4 and 9 may be used for rule outs due to negative sample reaction. Screen cell I may be used for rule outs due to negative sample reaction. Look at the antigens present on cells 4 and 9 that are in the homozygous state (highlighted in green). Remember the 3 to rule in and 3 to rule out procedure. Antibodies ruled out (with 3 reactions): e, k, Kpb, Jsb, Jka, Leb, P1, Lub. A selected panel should be set up to rule out (with 3 reactions) the remaining clinically significant antibodies (E, D, C,c, K, Fya, Fyb, Lea, M,N, S, and s).
|Example- Choosing Selected Cells|
The selected cells should be antigen-negative for the antibody that you think is present and antigen-positive (homozygous) for what you are trying to rule out. You are designing a panel that addresses your testing needs. Example: JkbIf you suspect that your patient has an anti-Jkb and further rule out cells are needed, then those rule out cells should be negative for Jkb. In the table below, donor cells 1,2, 4, 6, 9 and 10 may be used when creating a select panel to test the patient and help rule out the remaining possible antibodies. The homozygous rule applies when choosing which cells to use for testing (antigens highlighted in light-yellow).Example: Picking cells to rule out CUse panel cell 1 and panel cell 2 (C is in the homozygous state). Explanation: Panel cells 1 and 2 do not contain the antigen Jkb (signified by "0" on cell panel). If these cells are tested with the patient's plasma and the reaction is negative, it can be assumed that the patient does not have an antibody to C. C is now ruled out because there would be a total of 3 negative patient reactions with C positive cells (These two reactions and screen cell I from the antibody screen, shown again below). This should be done for all clinically significant antibodies that you were unable to rule out on the first panel.