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Cryoablation catheter

A technology for ablation catheters and catheters, applied in catheters, cooling surgical instruments, medical science and other directions, can solve the problems of long pre-cooling time of cryo-catheters, increased risk of clinical use, and high use pressure of cryo-catheters

Pending Publication Date: 2021-05-18
NINGBO SHENGJIEKANG BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The objectives of the present invention include: 1. Solve the problem that the cryocatheter is faced with a sudden high air intake pressure, resulting in balloon damage or rupture, thereby increasing the risk of clinical use; 2. Solving the problem that the cryocatheter requires a long pre-cooling time; 3. Solve the problem of excessive pressure in the cryocatheter

Method used

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  • Cryoablation catheter
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Such as Figure 1-8 As shown, a cryoablation catheter includes a catheter 200, a handle 100 at the proximal end of the catheter 200, and a balloon 300 at the distal end of the catheter. Among them, the proximal end refers to figure 1 , 2 Left orientation is indicated, distal is indicated in right orientation.

[0069] Several pipelines are arranged in the handle 100 , including an air inlet pipe 110 for connecting with an air source, an air return pipe 120 for connecting with an exhaust mechanism, and a vacuum pipe 130 for connecting with a vacuum device. The balloon 300 includes a foldable balloon, and the balloon can be any known existing balloon. The cryoablation catheter is precooled as figure 1 As shown, the balloon 300 is folded at this time, and it is as shown in the cryoablation figure 2 As shown, the balloon 300 is now inflated.

[0070] Such as Figure 3a As shown, the conduit 200 may include a first conduit 201, a second conduit 202, a third conduit 2...

Embodiment 2

[0085] Such as Figure 9a , 9b As shown, a cryoablation catheter has the same main structure as that of Embodiment 1, the difference lies in the structure of the sealing assembly for separating the two nozzle assemblies. Specifically,

[0086] To isolate the first orifice assembly 221 from the second orifice assembly 222 , the cryoablation catheter includes a baffle 232 hingedly disposed on the inner wall of the sealing area 2021 of the second catheter 202 . When the baffle 232 is in the closed position, the second conduit 202 is divided into two parts by it, the first conduit 201 is located in the proximal part, the second nozzle assembly 222 is located in the distal part separated by it, and the first nozzle assembly 221 is not in communication with the second nozzle assembly 222 . After the first conduit 201 is displaced to the distal end, the baffle 232 is opened, for example pushed away by the first conduit 201, the baffle 232 is in the open position, and the distal en...

Embodiment 3

[0091] Such as Figure 10a , 10b As shown, a cryoablation catheter, the main structure of which is the same as that of the second embodiment, the difference is that the structure of the distal end of the first catheter 201 is different.

[0092] Specifically, the distal end of the first conduit 201 is an open distal port, and the through hole 2013 on the side wall of the distal end of the first conduit 201 is also canceled; that is, the structure of the distal end of the first conduit 201 is determined by the embodiment The closed distal point in 1 and 2 is composed of several through holes 2013 arranged adjacent to the distal point, and becomes only formed by the open distal port 2014 . Other structures and working processes are the same as those in Embodiment 2.

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Abstract

The invention belongs to the technical field of cryoablation, and particularly relates to a cryoablation catheter. The cryoablation catheter comprises a catheter body, a handle, a balloon, a sealing assembly and a first spraying hole assembly arranged at the far end of an incoming flow cavity; a freezing spray pipe provided with a second spray hole assembly is arranged in the balloon, and the incoming flow cavity is arranged in a displaceable mode so as to drive the sealing assembly which is located in a connecting cavity of the freezing spray pipe and can be opened or closed to separate or communicate the incoming flow cavity and the connecting cavity of the freezing spray pipe. The incoming flow cavity is arranged in a displaceable manner, so that the cryoablation catheter has the same pipeline structure during precooling and freezing, the balloon is folded and is not frozen during precooling, and an air inlet pipeline is pushed into the frozen balloon during cryoablation to expand the frozen balloon for cryoablation.

Description

technical field [0001] The invention belongs to the technical field of cryoablation, and in particular relates to a cryoablation catheter. Background technique [0002] After years of development, more and more tissue ablation techniques have been applied clinically, such as cryoablation techniques, radiofrequency ablation techniques, microwaves, and lasers. Among them, cryoablation is one of the representative technologies. It uses low-temperature equipment to control the lesion tissue to undergo cooling, freezing, rewarming and other processes, thereby causing irreversible damage or even necrosis of cells. The mechanisms by which cryoablation kills cells include: cell dehydration and shrinkage, intracellular ice crystal formation, mechanical damage, cytotoxic concentration of electrolytes and pH changes, denaturation of cell membrane protein components, blood stasis and microthrombus formation, and immune effects. [0003] Cryoablation is not only less traumatic, but also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/02
CPCA61B18/02A61B2018/00577A61B2018/0212
Inventor 俞鹏陆战钶宋超邢宗江吕德财
Owner NINGBO SHENGJIEKANG BIOTECH
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