I'm having trouble with my venous buttonhole in my lower arm fistula. I get a flashback but then it stops pumping, often before I've had a chance to level out. My other problem is that I get into the channel but won't get a flashback. Any ideas? I'm going to an IR this week to see what's going on. I have a good thrill at my elbow and wrist and can hear my bruit.
Thanks for you help, I'm stumped on this one.