So...on the topic of doing a 2nd ABO type check: currently our hospital will typically use the same sample that is used for the TS/crossmatch, with another tech (if available) doing the 2nd retype. Occasionally, we will have a CBC tube drawn at a different time, utilized for the 2nd retype. If the second retype is done by the same tech, an IS XM must be done (no electronic XM). Obviously, using the same tube, even with different techs, does not ensure positive patient identification, only that the blood type was resulted correctly.
The hospital is reluctant to require a second specimen to