Results: Blood antigens were weakened or lost in 17 case (37.0%).A antigen was easiest to weaken or lose.ABO antibodies might also be weak.

• 结果:血型抗原减弱或丢失者占17例(37.；0%25)；A抗原最容易减弱或丢失；ABO抗体也可以减弱。