Whether for bypass grafting or creation of a vascular access, a correctly sized and placed tissue tunnel is of the utmost importance in many vascular procedures. GORE® Tunneler is the answer for those seeking a high-precision tunneling instrument. The unique hollow sleeve configuration minimizes the risk of twisting or kinking for more accurate graft placement. Close approximation of tissue to graft throughout the length of the tunnel facilitates tissue ingrowth. Moreover, this design reduces or eliminates the need for counter incisions in long bypass procedures, and reduces the potential for seroma resulting from graft wetting. GORE® Tunneler also minimizes trauma and resultant swelling - a key benefit in soft tissue tunnels created for access and extra-anatomic bypass.