My veins are giving out!

Have bloodwork, infusion, scans and doctor appointments - one of these almost every week - and amost all require NEEDLES!  My poor veins have so much scar tissue that it's taking several attempts to find a cooperative vein; worst one, five sticks before they found a vein prior to my MUGA scan.  Worst issue is that they can only use my left arm; since they removed lymph nodes under my right arm, they can't inject or extract anything.  ...and I'm so dehydrated I have to drink a bottle of Gatorade before they attempt to poke me.  Bloodwork tomorrow, yippee!