And no it's not cause I chickened out

I found out Monday evening that they have to use little titanium clips on some of the arterial grafts - where they attach the new arteries to the old ones - as some arteries are too small to use regular sutures. Not wanting metal in my heart because of my allergy is the sole reason I was going go have bypass instead of stents. The doc thinks the chances of an allergic reaction to titanium are small, but it can happen. And once they are in there they can't be removed.
I am so bummed. To get all prepared and psyched for this surgery and now to have to cancel. But my gut is telling me not to do it. I'm pretty upset too cause the surgeon knew my concerns, and we had talked about the wire they use to hold the breastbone together while it healed but he never ever mentioned these clips before. If I had been in his office on Monday when I found out about this I think that, bad heart or not, DH would've had to hold me back from trying to beat the guy down.
The best I can do is to get one of the clips, which DH is picking up this morning, and have it taped to my body for a few days to see if there's a reaction. It's not ideal because you can develop a reaction at any time in your life, so I could be fine for 5 years and then suddenly it's a problem - especially if there is nickle in alloy. But the surgeon, at least this one, made it clear that he won't do the procedure if he can't use the clips. So my "allergy test" should be over on Monday and I'll know more then. This sucks because the bottom line for me is that I don't want ANY metal in my body that can't be removed later if needed.