What is a buttonhole?

Sorry for my ignorance but I have kept reading about the buttonhole. I have tried looking on the internet including the page on this site but have yet to find out what exactly a buttonhole is and how is it different from what I use currently - 2 sharp needles everytime.

Let me put it in basic language…

Basicly, its like inserting earings into your arm…into the same hole over and over…no pain, no scarring, and best of all…comfort zone…

AV Sharp needles scar your fistula, and on the long run can damage it…

Buttonhole is easy to do…use a sharp needle on the same spot, same angle up to 3-7 times, then start using a buttonhole needle in that same spot…and just insert it as if your inserting an earing…

These message boards are a great source of information but don’t forget that the main part of the Home Dialysis Central website.It is full of articles and papers - including a great Buttonhhole article here
http://www.homedialysis.org/v1/types/buttonhole.shtml

The artice includes diagrams.