CN215384555U

CN215384555U - Cryoablation balloon and cryoablation equipment

Info

Publication number: CN215384555U
Application number: CN202120365748.7U
Authority: CN
Inventors: 关天元; 左廷涛; 陈景春; 余蓓; 刘湃
Original assignee: Lepu Medical Technology Beijing Co Ltd
Current assignee: Lepu Medical Technology Beijing Co Ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2022-01-04
Anticipated expiration: 2031-02-08

Abstract

The utility model discloses a cryoablation balloon and cryoablation equipment, wherein the cryoablation balloon comprises: a balloon unit, a heat-insulating delivery unit, and a freezing delivery unit. The balloon unit comprises a freezing body and a heat insulation body, and the heat insulation body is wrapped outside the freezing body; the freezing body is provided with a freezing cavity suitable for storing freezing media; the insulating body has an insulating cavity adapted to store an insulating medium; the heat insulation conveying unit is suitable for conveying heat insulation media to the heat insulation cavity; the freezing delivery unit is adapted to deliver an insulating medium into the freezing chamber. The cryoablation sacculus of this structure is through guaranteeing adiabatic chamber and freezing chamber mutual independence to realize that the part that is not covered by adiabatic body in the freezing body fully contacts with the tissue part of waiting to ablate, and set up the adiabatic body and the regional contact of healthy tissue at the opposite side, thereby guarantee to wait that the pathological change tissue of treatment melts, and healthy tissue can not receive the damage in the human body, improves the accurate nature of treatment.

Description

Cryoablation balloon and cryoablation equipment

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a cryoablation balloon and cryoablation equipment.

Background

Cryotherapy techniques have been widely used in modern medicine to achieve therapeutic effects by rapidly cooling tissue to a certain temperature to kill specific tissues or cells. The cryoablation technology mostly utilizes the joule thomson effect of refrigerant or the principle of vaporization heat absorption to take away the heat of target tissues or areas of a human body, so as to realize rapid cooling. Common medical devices of interest are cryoablation balloons, probes, catheters, and the like. The cryoablation balloon serving as a conventional cryosurgical medical instrument is widely applied to treatment of common diseases such as atrial fibrillation and the like, and good effects are achieved. The cryoablation mode has less bleeding, reduces cauterization in the treatment process compared with the common radio frequency ablation, and has less negative effect after operation.

The cryoablation balloon with the existing structure realizes that the treatment surface of cryoablation extends along the outer circumference of the balloon, and realizes ablation on a target tissue structure in a human body. However, in the above-mentioned cryoablation balloon, in the course of actually treating a tumor, the tumor is unevenly distributed in the cavity and is present only on one side of the human tissue, but when the conventional cryoablation balloon is used for treatment, the lesion-free tissue is easily ablated, and healthy human tissue is easily damaged.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the present invention is: the existing freezing saccule is adopted for treatment, so that the non-pathological tissue is easy to be ablated, and healthy human body tissue is damaged.

To this end, the present invention provides a cryoablation balloon comprising:

a balloon unit including a freezing body and a heat insulating body wrapped outside the freezing body; the freezing body has a freezing chamber adapted to store a freezing medium; the insulating body has an insulating cavity adapted to store an insulating medium;

an insulated delivery unit, the balloon unit disposed at a distal end of the insulated delivery unit, the insulated delivery unit adapted to deliver the insulating medium to the insulating cavity;

a cryo-delivery unit, the balloon unit disposed at a distal end of the cryo-delivery unit, the cryo-delivery unit adapted to deliver the insulating medium into the cryo-chamber.

Optionally, the cryoablation balloon as described above, the cryodelivery unit comprising:

the inner layer conveying member and the middle layer conveying member,

the inner layer conveying piece is arranged in the middle layer conveying piece and is suitable for conveying the freezing medium to the inner layer conveying piece, and the middle layer conveying piece is communicated with an external suction device so as to form negative pressure at the near end of the middle layer conveying piece.

Optionally, in the above cryoablation balloon, the inner delivery member comprises:

the sleeve body extends from the proximal end to the distal end;

the near end of the first transmission pipe is suitable for being communicated with a freezing air source, the far end of the first transmission pipe is wound on the sleeve body, and a plurality of spray holes are formed in the first transmission pipe.

Optionally, in the cryoablation balloon, an output direction of the nozzle hole is toward a side away from the heat insulation body.

Optionally, the cryoablation balloon is provided with 8 jet holes.

Optionally, in the cryoablation balloon, the first transmission tube has a straight tube section disposed near one side of the proximal end, and a winding section disposed near one side of the distal end, and the winding section is spirally wound outside the sleeve body; the spray holes are arranged in the winding section.

Optionally, the cryoablation balloon as described above, the thermally insulated delivery unit comprising:

a second transfer tube, a proximal end of the second transfer tube being in communication with the insulated gas source, a distal end of the second transfer tube being in communication with the insulated chamber;

the outer-layer conveying piece is sleeved on the outer side of the middle-layer conveying piece and communicated with the heat insulation cavity, and the outer-layer conveying piece is communicated with an external suction device so as to form negative pressure at the near end of the outer-layer conveying piece.

Optionally, in the cryoablation balloon described above, the heat insulation body has a petal structure or a hemisphere structure.

A cryoablation apparatus is characterized by comprising the cryoablation balloon.

The technical scheme provided by the utility model has the following advantages:

the utility model provides a cryoablation balloon, comprising: a balloon unit, a heat-insulating delivery unit, and a freezing delivery unit. The balloon unit comprises a freezing body and a heat insulation body, and the heat insulation body is wrapped outside the freezing body; the freezing body has a freezing chamber adapted to store a freezing medium; the insulating body has an insulating cavity adapted to store an insulating medium; the balloon unit is arranged at the distal end of the heat insulation conveying unit, the heat insulation conveying unit is communicated with the heat insulation cavity, and the heat insulation conveying unit is suitable for conveying the heat insulation medium to the heat insulation cavity; the balloon unit is arranged at the far end of the freezing and conveying unit, the freezing and conveying unit is connected with the heat insulation cavity, and the freezing and conveying unit is suitable for conveying the heat insulation medium into the freezing cavity.

The cryoablation sacculus of this structure is through guaranteeing adiabatic chamber and freezing chamber mutual independence to the realization, the part that is not covered by adiabatic body in the freezing body with wait to melt the tissue part and fully contact, and the adiabatic body and the regional contact of healthy tissue that set up at the opposite side, thereby guarantee to wait that the pathological change tissue of treatment melts, and healthy tissue can not receive the damage in the human body, improves the accurate nature of treatment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of a cryoablation balloon provided in an embodiment of the present invention;

fig. 2 is a schematic view of the proximal end of a cryoablation balloon having an insulated delivery unit and a cryodelivery unit engaged with each other in accordance with an embodiment of the present invention;

fig. 3 is a schematic structural view of another perspective of the cryoablation balloon with the insulated delivery unit and the cryodelivery unit engaged with each other in accordance with an embodiment of the present invention;

fig. 4 is an exploded view of the insulated delivery unit and the cryo-delivery unit in a cryoablation balloon provided in an embodiment of the utility model;

description of reference numerals:

11-freezing the body; 12-an insulating body;

21-a cannula body; 22-a first transfer tube; 221-spraying holes; 222-a straight tube section; 223-a winding section; 23-a middle layer conveying member;

31-a second transfer pipe; 32-outer layer conveying member.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a cryoablation balloon, as shown in fig. 1 to 4, including: a balloon unit, a cryo-delivery unit, and an adiabatic delivery unit. The balloon unit comprises a freezing body 11 and an insulating body 12, wherein the insulating body 12 is partially wrapped outside the freezing body 11; the freezing body 11 has a freezing chamber adapted to store a freezing medium; the insulating body 12 has an insulating cavity adapted to store an insulating medium; the balloon unit is arranged at the distal end of the heat insulation conveying unit, and the heat insulation conveying unit is suitable for conveying the heat insulation medium to the heat insulation cavity; the balloon unit is disposed at a distal end of the cryo-delivery unit, the cryo-delivery unit adapted to deliver the insulating medium into the cryo-chamber.

In the present embodiment, the freezing body 11 and the thermal insulation body 12 are both made of polyurethane material, in particular tpu (thermoplastic polyurethanes) material. The freezing body 11 is in a spherical shape, and the heat insulation body 12 is in a petal structure; of course, in other alternative embodiments, the insulating body 12 may also take a hemispherical structure. The heat-insulating body 12 is connected to the freezing body 11 by means of adhesive bonding.

In actual use, the outer wall surface of the freezing body 11 or the insulating body needs to be marked, and in the embodiment, the outer surface of the insulating body 12 is provided with a plurality of marking grooves, so that the insulating body 12 and the freezing body can be distinguished.

In other alternative embodiments, the frozen body 11 or the insulation body may be marked by a coating, so that an operator can judge the specific position of the frozen body 11 and the direction of the insulation body 12 during the actual operation process, thereby further reducing the damage to the non-diseased tissue.

In the present embodiment, as shown in fig. 2, 3 and 4, the freezing and conveying unit includes: inner and middle layer transports 23. Wherein the inner layer transfer member is installed in the middle layer transfer member 23, the inner layer transfer member is adapted to transfer the freezing medium thereto, and the middle layer transfer member 23 is communicated with an external suction device to form a negative pressure at the proximal end of the middle layer transfer member 23. In this embodiment, the inner transport member is made of a PEBAX (polyether block polyamide) material.

In this embodiment, as shown in fig. 2, the inner layer transport member includes: a sleeve body 21 and a first transfer tube. Wherein, the sleeve body 21 extends from the proximal end to the distal end; the proximal end of the first transmission pipe is suitable for being communicated with a freezing gas source, the distal end of the first transmission pipe is wound on the sleeve body 21, and a plurality of spray holes 221 are formed in the first transmission pipe. Specifically, the first transmission pipe has a straight pipe section 222 arranged near the proximal end side, and a winding section 223 arranged near the distal end side, and the winding section 223 is spirally wound outside the sleeve body 21; the injection hole 221 is provided at the winding section 223.

For example, in the present embodiment, as shown in fig. 3, the output direction of the nozzle hole 221 is set toward the side away from the heat insulating body 12. The winding section 223 is provided with 8 injection holes 221. The first transmission pipe 22 in this embodiment is a pipe body made of nitinol.

As shown in fig. 2, 3 and 4, the adiabatic transfer unit includes: a second transfer tube and an outer transfer member 32. Wherein the proximal end of the second transfer tube is in communication with the insulated gas source and the distal end of the second transfer tube 31 is in communication with the insulated chamber; the outer conveying member is sleeved on the outer side of the middle conveying member 23, the outer conveying member 32 is communicated with the heat insulation cavity, and the outer conveying member 32 is communicated with an external suction device so as to form negative pressure at the near end of the outer conveying member 32. The second transmission pipe is a pipe body structure made of nickel-titanium alloy materials. In this embodiment, the outer transport member 32 is made of a PEBAX (polyether block polyamide) material.

The refrigerant used in this embodiment is a low-temperature high-pressure refrigerant, and the refrigerant is nitric oxide or carbon dioxide. The freezing medium sprayed from the spraying hole 221 of the nickel titanium tube can be rapidly gasified into a gas state. The refrigerant formed in the gaseous state is drawn back by suction through the middle layer conveyance member 23. In this embodiment, the insulating medium used is a heat insulating medium such as nitrogen or helium.

The cryoablation balloon provided by the embodiment is used as follows, when the cryoablation balloon is actually used, the balloon is inserted into a human body, when the cryoablation balloon reaches a treatment position, it is ensured that the outer wall surface of the cryoablation body 11, which is far away from the heat insulation surface, is just opposite to the position of a lesion tissue of the human body, and then the heat insulation medium is introduced into the second transmission pipe 31, so that the heat insulation cavity is filled with the heat insulation medium, meanwhile or after the heat insulation medium is introduced, the freezing medium is introduced into the first transmission pipe 22, and circulates to the winding section 223 along the straight pipe section 222 until the freezing medium is sprayed out along the spray hole 221, so that cryoablation on the lesion position is realized, and the purpose of actual treatment is achieved. The freezing medium is recovered by the following method: a negative pressure is formed on the proximal side of the middle transport element 23, so that the gaseous freezing medium can be extracted along the gap formed between the middle transport element 23 and the inner transport element. The heat-insulating medium is recovered by the following method: negative pressure is formed on the proximal side of the outer transport member 32, so that the outer transport member 32

The cryoablation sacculus that this embodiment provided is through guaranteeing adiabatic chamber and freezing chamber mutual independence to the realization, the part that is not covered by adiabatic body 12 in the freezing body with wait to ablate the tissue part and fully contact, and the adiabatic body 12 and the regional contact of healthy tissue that set up at the opposite side, thereby guarantee to wait that the pathological change tissue of treatment is ablated, and healthy tissue can not receive the damage in the human body, improves the accurate nature of treatment.

Example 2

The present embodiment provides a cryoablation apparatus comprising the cryoablation balloon described in embodiment 1.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. A cryoablation balloon, comprising:

2. The cryoablation balloon of claim 1, wherein the cryodelivery unit comprises:

the inner layer conveying member and the middle layer conveying member,

3. The cryoablation balloon of claim 2 wherein the inner delivery member comprises:

the sleeve body extends from the proximal end to the distal end;

4. The cryoablation balloon of claim 3,

the output direction of the spray holes is arranged towards one side far away from the heat insulation body.

5. The cryoablation balloon of claim 3 wherein there are 8 of said orifices.

6. The cryoablation balloon of any of claims 3-5, wherein the first transmission tube has a straight tube section disposed proximate a proximal side and a winding section disposed proximate a distal side, the winding section being helically wound outside the sleeve body; the spray holes are arranged in the winding section.

7. The cryoablation balloon of any of claims 2-5, wherein the insulated delivery unit comprises:

8. The cryoablation balloon of any of claims 1-5,

the heat insulation body is of a petal structure or a hemisphere structure.

9. A cryoablation apparatus comprising the cryoablation balloon of any of claims 1-8.