There is described a platform device for use in forming an anastomosis and maintaining a desired curvature of a lumen in a desired shape during an anastomosis assistance period. The platform is formed from one or more bioabsorbable or biodegradable polymer filaments. There is also described a method for inserting a platform device for use in creation of an arteriovenous fistula by identifying a candidate artery and a candidate vein and dissecting the candidate vein. Next, inserting a platform device into the vein and creating a breach in the candidate artery at a desired angle and location. Next, introducing the platform device and vein into the candidate artery and forming the platform device into a curvature angle selected to minimize turbulent blood flow in an anastomosis formed by the vein and the artery. The platform may also be used to maintain potency of supply blood vessels and/or organ blood vessels or the lumens during an organ transplant procedure.
