I work for a large clinic (24 chairs, total of around 150 patients). We have several buttonholes that are just fantastic...really easy to pop those needles in. Others...well, we had to give up on because they would just NEVER establish the tunnel! Then you get the odd pt who gets a nice established buttonhole & then something weird happens & the AVF shifts or something & you can't find the tunnel anymore (which happened to one of my patients a few weeks ago...the arterial buttonhole is still there & great, but the venous is no where to be found, so I have to re-establish that one.

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Sometimes I wish we hadn't started the whole buttonhole thing...there are several patients that I had never had trouble sticking with regular sharp needles, but now that they're buttonholed, I can't get the darn needle in the AVF...due to the angle or whatever that the establishing cannulator used. Other times, it's great. Kind of a hit or miss thing.