Methods, devices and systems wherein a penetrating catheter or other penetrating device is used to penetrate into a target blood vessel, and wherein the target vessel is dilated prior to the penetration so as to improve the imaging, aiming at and/or penetration into the target vessel. In one embodiment,...http://www.google.com.au/patents/US6508824?utm_source=gb-gplus-sharePatent US6508824 - Catheter-based methods for enlarging blood vessels to facilitate the formation of penetration tracts, fistulas and/or blood flow channels
