"I'm having issues with my port drawing blood but it flushes fine. I started having this issue three weeks ago when I got discharged from the hospital to go home on IV antibiotics and since then I have changed the needle once at home,given it a break for two weeks after finishing IV antibiotics and even tried having my CF nurse administer Cath-Flo (TPN) in the port with no success. Has anyone else had this issue with their port? What did you do to get it working again?"