Technically in the UK if this happened it would be classed as assault, and a criminal offence, which is by its nature imprisonable.
It is the same in the US. Suing is an add-on. Lots of people in the US think suing is the appropriate remedy to just about anything.
Again, isn't there some kind of damage inherent in assault? How was this man damaged?
http://www.azleg.gov/ArizonaRevisedStatutes.asp?Title=13
I think the issue is that this doctor did something this woman asked him not to do to her body--an invasive thing in fact--which is considered battery.
Compare this to the fact that an ambulance taking you somewhere you asked them not to is considered kidnapping.
The additional issue is that he broke Arizona law by disregarding her Advanced Directive. Some physicians have been known to do this in cases when they believe their ethical duty to save lives outweighs following a misguided Advanced Directive. That is why patients are widely encouraged to discuss these issues w/their doctor ahead of time to ensure they're willing to follow your wishes.
Snoozy, your husband's experience is very strange. Was that recently? I'm sure the jwn nurses will tell you how elaborate and full of steps the process is to administer blood. Maybe they were asking him in order to verify the chart's accuracy--standard practice to ask repetitive questions like that. They don't always check the chart in front of you.