CN215349399U

CN215349399U - Novel cryoablation catheter

Info

Publication number: CN215349399U
Application number: CN202120491394.0U
Authority: CN
Inventors: 柴凌云; 邢宗江; 罗斌; 钟竹宇
Original assignee: Ningbo Senscure Biotechnology Co ltd
Current assignee: Ningbo Senscure Biotechnology Co ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2021-12-31
Anticipated expiration: 2031-03-08

Abstract

The utility model discloses a novel cryoablation catheter, which comprises an air return pipeline, an air inlet pipeline, a vacuum pipeline and a sealing device, wherein the air return pipeline is connected with the air inlet pipeline; the far end of the air return pipeline is fixedly connected with the refrigerating device, the vacuum pipeline is sleeved outside the air return pipeline, and the air inlet pipeline is sleeved in the air return pipeline; the near end of the air inlet pipeline is hermetically connected with the near end of the air return pipeline through a sealing device, the air inlet pipeline can move relative to the air return pipeline, and the far end of the air inlet pipeline can enter and exit the interior of the refrigerating device. According to the novel cryoablation catheter, the air inlet pipeline can move relative to the air return pipeline, and the far end of the air inlet pipeline can enter and exit the interior of the freezing device, so that the rapid cooling of the region of the freezing device can be realized.

Description

Novel cryoablation catheter

Technical Field

The utility model relates to the field of medical instruments, in particular to a novel cryoablation catheter.

Background

Cryoablation is a surgical medical technique that applies cryoablation to remove a target tissue. Compared with the prior radio frequency ablation, the patient in the cryoablation reduces pain because the patient does not endure high temperature.

The cryoablation catheter is a medical appliance necessary for cryoablation. Most of the existing cryoablation catheters adopt various pipeline structures, including a refrigerating device, an air inlet pipeline, an air return pipeline and a vacuum pipeline, in the process of re-freezing, a refrigerant reaches the area of the refrigerating device through the air inlet pipeline, and then is recovered from the air return pipeline. In the process, the temperature of the air inlet pipeline and the air return pipeline needs to be reduced by absorbing heat, so that the temperature reduction speed of the area of the freezing device is reduced, and the time for reaching the temperature required by cryoablation is prolonged.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to the problems of the prior art by providing a novel cryoablation catheter.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the novel cryoablation catheter comprises an air return pipeline, an air inlet pipeline, a vacuum pipeline and a sealing device; the far end of the air return pipeline is fixedly connected with a refrigerating device, the vacuum pipeline is sleeved outside the air return pipeline, and the air inlet pipeline is sleeved in the air return pipeline; the near end of the air inlet pipeline is hermetically connected with the near end of the air return pipeline through the sealing device, the air inlet pipeline can move relative to the air return pipeline, and the far end of the air inlet pipeline can enter and exit the refrigerating device.

Further, when the sealing connection of the sealing device is fixed sealing connection, the air return pipeline is a pipe with adjustable length.

Further preferably, the air return pipeline between the connection of the air return pipeline and the vacuum pipeline and the connection of the sealing device and the air return pipeline is a corrugated pipe.

Further, the sealing connection of the sealing device is a movable connection of a sealing ring.

Further preferably, the vacuum pipeline is fixedly connected with the outside of the air return pipeline in a connecting way, or is movably connected with the outside of the air return pipeline in a connecting way through two sealing rings.

Furthermore, a baffle or a one-way valve is arranged at the far port of the air return pipeline.

Compared with the prior art, the utility model has the following advantages:

according to the novel cryoablation catheter, the air inlet pipeline can move relative to the air return pipeline, and the far end of the air inlet pipeline can enter and exit the interior of the freezing device, so that the rapid cooling of the region of the freezing device can be realized.

Drawings

Fig. 1 is a schematic view of a cryoablation catheter in accordance with example 1 of the present invention;

fig. 2 is a schematic view of another cryoablation catheter in accordance with example 1 of the present invention;

fig. 3 is a schematic view of a cryoablation catheter in embodiment 2 of the present invention;

FIG. 4 is a schematic view of a cryoablation catheter with a flap or one-way valve in accordance with the present invention;

wherein the reference numerals are:

a refrigeration device 1; a vacuum pipeline 2; a return gas line 3; a sealing device 4; an air intake line 5.

Detailed Description

The present invention will be described in detail and specifically with reference to the following examples and drawings so as to provide a better understanding of the utility model, but the following examples do not limit the scope of the utility model.

Example 1

As shown in fig. 1, the present embodiment provides a cryoablation catheter, which includes a gas return pipeline 3, a gas inlet pipeline 5, a vacuum pipeline 2 and a sealing device 4; the far end of the air return pipeline 3 is fixedly connected with the refrigerating device 1, the vacuum pipeline 2 is fixedly connected with the air return pipeline 3 in a connecting way, and the air inlet pipeline 5 is sleeved in the air return pipeline 3; the near end of the air inlet pipeline 5 is hermetically connected with the near end of the air return pipeline 3 through a sealing device 4, the sealing connection of the sealing device 4 is a sealing ring movable connection, the air inlet pipeline 5 can move relative to the air return pipeline 3, and the far end of the air inlet pipeline 5 can enter and exit the interior of the refrigerating device 1.

During precooling, the far end (refrigerant outlet) of the air inlet pipeline 5 is arranged in the air return pipeline 3, the temperature of the refrigerating device 1 cannot be reduced while precooling the whole catheter, and during refrigerating, the far end of the air inlet pipeline 5 is extended into the refrigerating device 1 to realize cryoablation.

Referring to fig. 2, the present embodiment provides another cryoablation catheter, which differs from the cryoablation catheter described above and shown in fig. 1 in that: the vacuum pipeline 2 is movably connected with the outside of the gas return pipeline 3 through two sealing rings in a connecting way.

As a preferred example, referring to fig. 4, a baffle or a one-way valve is arranged at the distal port of the gas return pipeline 3 to prevent the cryogenic medium from entering the freezing device 1 during precooling.

Example 2

As shown in fig. 3, the present embodiment provides a cryoablation catheter, which includes a gas return pipeline 3, a gas inlet pipeline 5, a vacuum pipeline 2 and a sealing device 4; the far end of the air return pipeline 3 is fixedly connected with the refrigerating device 1, the vacuum pipeline 2 is fixedly connected with the air return pipeline 3 in a connecting way, and the air inlet pipeline 5 is sleeved in the air return pipeline 3; the near end of the air inlet pipeline 5 is hermetically connected with the near end of the air return pipeline 3 through a sealing device 4, the sealing connection of the sealing device 4 is a fixed sealing connection, and the air return pipeline 3 from the connection position of the air return pipeline 3 and the vacuum pipeline 2 to the connection position of the sealing device 4 and the air return pipeline 3 is a corrugated pipe; the air inlet pipe 5 is displaceable relative to the air return pipe 3, and the far end of the air inlet pipe 5 can enter and exit the interior of the refrigerating device 1.

While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.

Claims

1. A novel cryoablation catheter is characterized by comprising an air return pipeline (3), an air inlet pipeline (5), a vacuum pipeline (2) and a sealing device (4); the far end of the air return pipeline (3) is fixedly connected with a refrigerating device (1), the vacuum pipeline (2) is sleeved outside the air return pipeline (3), and the air inlet pipeline (5) is sleeved in the air return pipeline (3); the near end of the air inlet pipeline (5) is connected with the near end of the air return pipeline (3) in a sealing mode through the sealing device (4), the air inlet pipeline (5) can move relative to the air return pipeline (3), and the far end of the air inlet pipeline (5) can enter and exit the interior of the refrigerating device (1).

2. The novel cryoablation catheter as claimed in claim 1, characterized in that the return air line (3) is a tube of adjustable length when the sealing connection of the sealing device (4) is a fixed sealing connection.

3. The new cryoablation catheter as claimed in claim 2, characterized in that the return air line (3) is a bellows from the connection of the return air line (3) with the vacuum line (2) to the return air line (3) between the sealing means (4) and the connection of the return air line (3).

4. The new cryoablation catheter as claimed in claim 1, characterized in that the sealing connection of the sealing device (4) is a sealing ring articulation.

5. The novel cryoablation catheter as claimed in claim 4, characterized in that the vacuum line (2) is fixedly connected to the outside of the air return line (3) or is movably connected to the outside of the air return line (3) by two sealing rings.

6. The new cryoablation catheter as claimed in claim 1, characterized in that a flap or a one-way valve is provided at the distal port of the return air line (3).