Patent ID: 7621904

Claim:
A catheter, comprising: an elongated tubular shaft comprising an outer layer formed of a polymer, the outer layer having an inner diameter and an outer diameter, the outer layer comprising a proximal shaft section formed of a first polymer, an intermediate shaft section formed of a second polymer, a distal shaft section formed of a third polymer, and an interior lumen adapted to slidably receive a guidewire; a reinforcement extending substantially from the inner diameter of the outer layer to the outer diameter of the outer layer, the reinforcement comprising a first coil segment having a plurality of wire coil layers that are completely encased within the polymer forming the outer layer and a second coil segment extending distally from the first coil segment into the distal shaft section and comprising a single wire coil layer that is completely encased within the polymer forming the outer layer, wherein the first coil segment extends from the intermediate shaft section, through the proximal shaft section, to a position substantially adjacent a proximal end of the elongated tubular shaft; a distal tip section having a pre-shaped curved tip configuration; wherein the elongated tubular shaft includes an inner layer or coating of lubricious material disposed adjacent the interior lumen; and an intermediate layer disposed between the outer layer and the inner layer or coating.