Cryoablation catheter

Abstract

A cryoablation catheter, comprising a balloon and a delivery catheter passing through the balloon. The delivery catheter is provided with a fluid inflow cavity and a fluid outflow cavity therein. The fluid inflow cavity extends into the balloon, and a side wall of the fluid inflow cavity is provided with a spray head that injects a liquid into the balloon. The spray head has a number of spray holes circumferentially arranged on the exterior of the fluid inflow cavity. An end of the fluid outflow cavity has a cross section that seals the fluid outflow cavity, and a side wall of the fluid outflow cavity is provided with a reflow hole in communication with the balloon (1). A fluid flows from the fluid inflow cavity through the nozzle holes into the balloon. The nozzle holes are evenly distributed outside the fluid inflow cavity, so that the interior of the balloon is uniformly filled with the refrigeration fluid, ensuring the uniformity of heat exchange at each part of the balloon in an axial direction. The fluid then flows out from the reflow hole. The structural design can effectively improve the heat exchange efficiency of the fluid, and the production and processing processes are relatively simple.

Dependencies are inferred from the claim text.