Simon's thread about making a will reminded me of this issue, and the fact that many of you may not have given it much thought.
This is something that occurred to me many years ago - and I have a good friend listed as my Next of Kin (NOK).
A few years ago, I had a situation where I was hemmorhaging, not capable of giving consent because I was heavily sedated, and the permission had to be signed. My life-partner was my NOK, so no problem. As it turned out, I didn't need a transfusion, but it was touch-and-go for a while.
Nowadays, at least in Canada, doctors only transfuse blood if you *really* need it ... but in case of emergency, you never know. Your life could be at risk.
Your NOK does *not* have to be related, and can even live in another country (think of foreign students, for example) ... so you may want to ensure that your NOK will respect your wishes about blood transfusions.
xo
tal