Patent ID: 7628784

Claim:
A balloon catheter, comprising: a catheter shaft including: a generally tubular first layer defining a drainage lumen along substantially the entire length of the shaft from a proximal end of the shaft to a distal end thereof, the first layer consisting essentially of a non-metallic material with a first wet Young's Modulus; a generally tubular second layer bonded to an outer surface of the first layer, the second layer material having a second wet Young's Modulus less than the first wet Young's Modulus, an inflation lumen extending along the length of the shaft through the second layer from the proximal end of the shaft to a distal portion thereof, the inflation lumen positioned adjacent the first layer outer surface and terminating in an inflation eye extending through an outer surface of the second layer proximate to the distal end of the catheter shaft; and a generally tubular third layer, comprising a finish layer, bonded to the second layer outer surface from the proximal end of the shaft to the distal end thereof, the finish layer including a section applied over a pre-formed balloon that is unattached to the second layer outer surface at a circumferential location overlying the inflation eye, the unattached section of the balloon displaceable from the second layer outer surface in response to an inflation medium infused through the inflation eye.