It is a nickel mesh, I know that much and I was leery for that reason alone. 

 

Thank you so much for responding;  I think the doctor's don't regularly test for allergies.   We have an appointment with a guy who has one abour 20 of these which doesn't seem like very many.  I'd rather travel to someone who knows everything and maybe is familiar with various devices, not just one.

 

You know what I mean?

 

I understand that this procedure is replacing open heart surgery - it seems like it is the device or lifetime blood thinners.  He got clouted with a ball last night in softball practice (um.. frequent enough occurrence) and it raised a large bump - something it would not have done earlier.

 

Thanks so much for your response!  Terijo