I'm a firm believer in the right to die. In this particular instance, since the man is able to communicate, even if only by blinking his eyes, he can be interviewed by a neutral party (a judge, for example) to make certain that this is HIS decision, and if so to allow the procedure to go ahead. I can think of nothing worse than forcing someone to live in such a condition against their will. It's worse than prison, and for no reason.

And I would suggest, if you haven't already done so, that you make a Living Will, allowing your spouse, or someone designated with Medical Power of Attorney, to prevent any "heroic" measures from hospital staff being performed against your, or their, will.