Catheter with a polymide distal tip

摘要

A catheter having an elongated shaft which has a multilayered distal tip with a first layer formed of a polyimide first material and a second layer formed of a polymeric second material. In one embodiment the multilayered distal tip is a separate member, distal to the distal end of a proximal portion of the shaft. In another embodiment, the shaft has an outer tubular member, and a multilayered inner tubular member with a distal end which forms the multilayered distal tip of the shaft. In a presently preferred embodiment, the polyimide material is a thermoset polyimide. In one embodiment, the polymeric second material is a polyamide material.

主权项

1. A balloon catheter, comprising:
a) an elongated shaft having an outer tubular member with a first lumen, and an inner tubular member disposed within the outer tubular member lumen with a second lumen and with a first layer formed of a polyimide first material, and a second layer which is on an outer surface of the first layer and which is formed of a polymeric second material not fusion bondable to the polyimide first material, the inner tubular member having a distal end which forms a distal tip of the shaft; and b) a balloon on a distal section of the catheter shaft, having a proximal end secured to the outer tubular member, a distal end secured to the second layer of the inner tubular member, and an interior in fluid communication with the first lumen.