Emergency transfusion of uncrossmatched blood to injured patients via helicopter personnel in the field

A colleague in New Mexico reports that her facility supplies group O Rh negative RBC units for an emergency helicopter service. She was wondering if other suppliers of uncrossmatched blood to emergency helicopter services perform post-transfusion crossmatches and if so, what is the perceived value or compliance requirement to do such testing? She has reviewed the following discussions:

but could not find any specific mention of the need to complete crossmatching when the blood is infused uncrossmatched by helicopter personnel to the patient in the field.

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