The question has the word YOU capitalized.
If I was put in the position of making the choice, and the person was unable, then according to MY conscience, I would do anything to save their life. If the person had a do not resuscitate card and they were advanced in age, or had some chronic illness, then I would respect that. It would be difficult, but I know how the quality of life is for older or very sick persons who are bedridden or on feeding tubes. It totally sucks, and mentally tortures them.
I would assume, that any JW, who for some reason was given blood, against their wishes, when they had no way to speak for themselves, would under no circumstances be blamed for 'going against the teachings'
they should face no criticism from anyone. no one need know actually.
In my exp as well, unbaptized JW's who for some reason are given blood [with the go ahead of a non JW family member] , are viewed as 'spiritually immature' 'not yet dedicated' and therefore not judged.
at least thats the last viewpoint that was shared with me on the matter.