Cryoablation balloon catheter with guide wire lumen

摘要

A cryoablation system has a catheter that receives working cryogen, the catheter having a catheter body that has a distal section having a freezing element which delivers the working cryogen to a treatment location, and a balloon enclosing the freezing element. The catheter body includes an outer tube that has two delivery tubes and a guide wire tube positioned inside the outer tube.

主权项

1. A cryoablation system, comprising:
a gas source which provides a working nitrogen gas at room temperature and at a constant set pressure; a liquid generator which is coupled to the gas source to receive the working gas, and which then generates a working cryogen fluid; a catheter coupled to the liquid generator for receiving the working cryogen, the catheter having a catheter body that has a distal section having a freezing element which delivers the working cryogen to a treatment location, and a balloon enclosing the freezing element, wherein the catheter body has an outer tube, a first lumen positioned inside the outer tube and coaxially spaced from the outer tube to define a fluid delivery space, the first lumen having two delivery tubes and a guide wire tube positioned inside the first lumen; and wherein the freezing element includes portions of the two delivery tubes configured as a double-coiled element incorporated in series with a single-loop element, wherein the single-loop element is embedded within a flexible soft tip positioned distal of the distal section.