I think it remains to be seen who did what prior to routine bleeding turning into life threatening bleeding. Did the family provide any food or drinks, like a popsicle, to a patient in intensive care? Did the family handle the suction tube? Did the family have difficulties accepting routine bleeding and, as a result, cause excessive bleeding by incorrectly suctioning blood? How many family members were in the ICU?
If the family in any way interfered with the care of a patient in ICU, then it looks more like the family is trying to cover up their mistake while at the same time trying to shift blame and demand a 30 million dollar award. Personally, I don't think that there is any reason for signed, informed consent to be reversed after the procedure is done.