User blog comment:Xilinoc/Ch. 596 - Rubb-Dolls 3/@comment-5693502-20140910133132/@comment-5398287-20140910143933

I'm guessing Mayuri doesn't know about her ability to regenerate from lethal injuries; after all, he only knew about her zombie ability when she explained it to Yumichika and Ikkaku, and she hadn't been mortally injured immediately prior.