Balloon catheter

摘要

A balloon catheter of novel configuration, which is capable of both efficiently heating a heating element by using a laser light and of ensuring durability by avoiding the laser light directly heating members other than the heating element. Provided is a balloon catheter with a balloon disposed in a distal end section of a shaft and wherein: a tightly wound coil shaped heating element is housed and arranged in the balloon; an optical fiber that irradiates a laser light inside the heating element is disposed; and a supply path that supplies a fluid to inside the balloon through an inside of the heating element and a discharge path that discharges the fluid from inside the balloon through a discharge port positioned on an outside of the heating element are disposed.

主权项

1. A balloon catheter comprising:
a shaft; a balloon provided on a distal end section of the shaft; a heating element located in the balloon and having a linear hollow coil shape including a metal wire wound in a closely-wound coiled state with the wound metal wire overlapped closely in an axial direction; an optical fiber configured to irradiate a laser light, at least part of the optical fiber located inside the heating element; a supply path configured to supply a fluid through an inside of the heating element to an inside of the balloon; and a discharge path configured to discharge the fluid from the inside of the balloon through a discharge port positioned outside the heating element, wherein the heating element is arranged in a lengthwise direction of the shaft, the optical fiber is configured to irradiate the laser light from a side of a proximal end of the heating element toward a side of a distal end of the heating element, the distal end of the heating element is blocked, and the heating element includes a part for which a coil inner diameter gradually becomes smaller in a tape shape across a designated length of the side of the distal end.