Figure 3.

Example of different cross‐match test results with the direct antiglobulin‐enhanced immunochromatographic strip and gel column methods. (A) Cross‐match strip method: Any band intensity at “XM” is considered incompatible (graded 1+ to 4+). (B) Cross‐match gel column method: For each series of cross‐matches, a negative control (CT‐) and a positive control (CT+) were performed with the donor RBCs. In the absence of agglutination, all RBCs resided at the bottom of the gel, which was scored as “compatible” (0), whereas agglutination on the top of or within the gel was considered “incompatible” (graded 1+ to 4+).