Similar situation a few nights ago when I was called in to do a ruptured but contained ascending TAA. Lady was a Jehova's Witness and a very unpleasant individual. Explained every aspect of the anesthesia and surgery to her and told her that she needed to have blood because of the location of the dissection, probable need for an AVR, etc. Starting Hct 28. Told me that she refused blood at which time I assured her that she would die and that she should go ahead and tell her family that this was the last time they would see her.
She became angry, threatened a law suit, etc., but I told her that I wasn't pressuring her or forcing her to accept blood, just stating facts: University CT service, DHCA for at least 40 minutes, high probability of coagulopathy, hemodilution with non blood products only and consequences of that, etc. She would die unless God fixed her rupture or used a miracle to improve the surgeons' speed and efficiency. Her choice. Wrote everything down in her chart and asked her to sign a statement showing that she refused blood in this high risk surgery.
She relented and accepted blood: 20 units of PRBC's, 16 of FFP, 2 platelets, 2 cryo.
So we basically saved her life and sent it to hell at the same time.