CN210354888U

CN210354888U - Cryoablation needle

Info

Publication number: CN210354888U
Application number: CN201920314405.0U
Authority: CN
Inventors: 刘朋; 史岩; 肖剑; 黄乾富
Original assignee: Hygea Medical Technology Co Ltd
Current assignee: Hygea Medical Technology Co Ltd
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2020-04-21
Anticipated expiration: 2029-03-12

Abstract

The utility model discloses a cryoablation needle, which comprises a needle tube part and a handle part which are hermetically connected to form a medium inlet and return flow path; one end of a first vacuum heat-insulation pipe of the needle tube part is connected with the initial end of a first outer layer return pipe of the needle tube part, and the other end of the first vacuum heat-insulation pipe is connected with the tail end of the first outer layer return pipe through a transition sleeve so as to construct vacuum heat insulation of a non-treatment area of the needle tube part; one end of a second vacuum heat-insulation pipe of the handle part is connected with the tail end of a second outer layer return pipe of the handle part, and the other end of the second vacuum heat-insulation pipe is connected with a transition sleeve of the needle tube part through a vacuum substrate cover so as to construct vacuum heat insulation of the handle part; the inner layer inflow pipe is inserted into the first outer layer return pipe and the second outer layer return pipe which are communicated with each other, so that a medium inflow passage and a medium return passage are formed. The scheme can realize the hierarchical construction of vacuum heat insulation through structural optimization, and provides technical support for effectively improving the treatment process of the vacuum interlayer.

Description

Cryoablation needle

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to cryoablation needle.

Background

Cryoablation is a surgical medical technology for eliminating target tissues by using a refrigerant and a heating medium, and a low-temperature medium is required to be conveyed to an affected part of a patient by using an ablation needle in the operation so as to absorb heat through evaporation of a liquid refrigerant and take away tissue heat, so that the temperature of a target ablation part is reduced, and cell tissues of abnormal electrophysiology are damaged to achieve the purpose of treatment. After the freezing is finished, the high-temperature heat medium steam is controlled to reach the treatment part of the ablation needle, so that a large amount of heat is released instantly, and the treatment area is quickly rewarming.

As is known, the vacuum heat insulation performance at the needle tube of the ablation needle is particularly important in order to ensure that normal tissues are not frostbitten (directly act on the needle tube part of a human body) in the treatment process. The existing cryoablation needle adopts a single vacuum mode to achieve the purpose of heat insulation. Limited by the structure principle, the vacuum interlayer treatment process is complex in order to ensure the vacuum at the needle tube.

In view of this, it is desirable to optimize the design of the conventional ablation needle to effectively control the vacuum establishment time and improve the manufacturability of vacuum interlayer treatment.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a cryoablation needle utilizes structural optimization can obtain better vacuum set-up time, provides technical guarantee for effectively improving the interbedded processing technology of vacuum.

The utility model provides a cryoablation needle, which comprises a needle tube part and a handle part which are hermetically connected to form a medium inlet and return flow path; one end of a first vacuum heat-insulation pipe of the needle tube part is connected with the initial end of a first outer layer return pipe of the needle tube part, and the other end of the first vacuum heat-insulation pipe is connected with the tail end of the first outer layer return pipe through a transition sleeve so as to construct vacuum heat insulation of a non-treatment area of the needle tube part; one end of a second vacuum heat-insulation pipe of the handle part is connected with the tail end of a second outer layer return pipe of the handle part, and the other end of the second vacuum heat-insulation pipe is connected with a transition sleeve of the needle tube part through a vacuum substrate cover so as to construct vacuum heat insulation of the handle part; the inner layer inflow pipe is inserted into the first outer layer return pipe and the second outer layer return pipe which are communicated with each other, so that a medium inflow passage and a medium return passage are formed.

Preferably, the transition sleeve is disposed within the vacuum base housing, the transition sleeve comprising: the outer pipe transition sleeve is connected with the first vacuum heat-insulating pipe; the inner pipe transition sleeve is connected with the first outer layer return pipe; wherein opposite ends of the outer tube transition sleeve and the inner tube transition sleeve are nested together.

Preferably, the inner wall of the opposite end of the outer pipe transition sleeve is provided with a limit step, and the opposite end of the inner pipe transition sleeve is inserted and matched with the limit step.

Preferably, the vacuum-insulated vacuum-pumping port for constructing the non-treatment area of the needle tube part is positioned on the side wall of the outer tube transition sleeve, and the inner wall of the opposite end of the inner tube transition sleeve is provided with an inner concave part capable of accommodating the getter.

Preferably, the vacuum-pumping port is sealed by glass solder.

Preferably, the vacuum substrate housing comprises: a cover base connected to the second vacuum heat-insulating tube; the cover cap body is connected with the transition sleeve; wherein the opposite ends of the cover base and the cover body are nested together.

Preferably, the peripheral surface of the opposite end of the cover body is provided with a limit step, and the opposite end of the cover base is fittingly fitted with the limit step.

Preferably, the vacuum-insulated evacuation port that forms the handle portion is located in a side wall of the housing base, and the opposite end of the housing body has an interior recess that receives a getter material.

Preferably, a clamping part is arranged on the second vacuum heat insulation pipe at a position close to the vacuum base body cover and is used for being in adaptive connection with a system pipeline.

Preferably, a ring groove for placing a sealing member is formed in an outer circumferential surface of the second vacuum heat-insulating pipe beside the clamping portion.

Aiming at the prior art, the utility model respectively carries out independent vacuum heat insulation treatment on the needle tube part and the handle part which enter the human body, specifically, one end of a first vacuum heat insulation tube of the needle tube part is connected with the initial end of a first outer layer return tube, and the other end of the first vacuum heat insulation tube is connected with the tail end of the first outer layer return tube through a transition sleeve so as to construct the vacuum heat insulation of the non-treatment area of the needle tube part; one end of a second vacuum heat insulation pipe of the handle part is connected with the tail end of the second outer layer return pipe, and the other end of the second vacuum heat insulation pipe is connected with a transition sleeve of the needle tube part through a vacuum substrate cover so as to construct vacuum heat insulation of the handle part. According to the arrangement, the needle tube part and the handle part respectively and independently establish vacuum heat insulation, on one hand, a vacuum interlayer treatment process can be selected according to the importance degree of heat insulation requirements, good vacuum establishing time is obtained, the processing manufacturability can be effectively improved, and the vacuum maintenance is facilitated while the manufacturing cost of products is reduced; meanwhile, the backflow structure is introduced into the ablation needle, so that the structure of the ablation needle is simplified.

In the preferred scheme of the utility model, arrange in the vacuum base member cover in the transition cover, make the vacuum insulation structure of needle tubing part arrange in the vacuum insulation component of handle portion from this to ensure to require the vacuum insulation performance of higher needle tubing part, and then ensure that other positions of the human body in non-treatment area do not receive the influence of medium temperature, can further improve the fail safe nature of this cryoablation needle.

Drawings

FIG. 1 is a schematic view of the overall structure of a cryoablation needle according to an embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of the portion of the syringe shown in FIG. 1.

In the figure:

the vacuum heat-insulating pipe comprises a needle tube part 10, a handle part 20, a first vacuum heat-insulating pipe 1, a first outer layer return pipe 2, a transition sleeve 3, an outer pipe transition sleeve 31, a limiting step 311, a vacuumizing port 312, an inner pipe transition sleeve 32, an inner concave part 321, an inner layer inflow pipe 4, a second vacuum heat-insulating pipe 5, a clamping part 51, a ring groove 52, a second outer layer return pipe 6, a vacuum base cover 7, a cover base 71, a vacuumizing port 711, a cover body 72, a limiting step 721, an inner concave part 722 and a sealing element 8.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, a schematic diagram of the overall structure of the cryoablation needle according to the present embodiment is shown.

The cryoablation needle comprises a needle tube portion 10 and a handle portion 20 which are hermetically connected, a medium inflow/return passage is formed inside, and a good vacuum insulation performance is provided between a non-treatment region of the needle tube portion 10 and the handle portion 20. Referring to fig. 2 and 3 together, fig. 2 is an enlarged view of a portion a of fig. 1, and fig. 3 is a view of a portion of the syringe shown in fig. 1.

As shown in the figure, one end of the first vacuum insulation pipe 1 of the syringe part 10 is connected with the beginning end of the first outer return pipe 2, and the other end of the first vacuum insulation pipe 1 is connected with the tail end of the first outer return pipe 2 through the transition sleeve 3 to construct vacuum insulation of the non-treatment area B of the syringe part 10. Wherein one end of the second vacuum insulation tube 5 of the handle part 20 is connected with the end of the second outer reflux tube 6 thereof, and the other end of the second vacuum insulation tube 5 is connected with the transition sleeve 3 of the needle tube part 10 through the vacuum substrate cover 7 to construct vacuum insulation of the handle part 20. Thus, the needle cannula portion 10 and the handle portion 20 each independently establish vacuum insulation.

Here, "start" and "end" are defined with reference to describing the flow direction of the medium in the subject first outer layer return pipe 2 and second outer layer return pipe 6, and it can be confirmed that the use of the above-mentioned directional words is only used to clearly express the relative positional relationship between the fitting members, and does not constitute a substantial limitation to the scope of protection of the present solution.

The inner layer inflow pipe 4 is inserted into the first outer layer return pipe 2 and the second outer layer return pipe 6 which are communicated with each other, so as to form a medium inflow passage (shown by an arrow → in the figure) and a medium return passage (shown by an arrow ← in the figure). During operation, the medium reaches the needle tip through the inner layer inflow tube 4, and after heat exchange with lesion tissues is completed, the medium flows back to a system pipeline (not shown in the figure) through the first outer layer return tube 2 and the second outer layer return tube 6.

The present embodiment provides a cryoablation needle in which vacuum insulation is established independently in the needle tube portion 10 and the handle portion 20, and thus, a vacuum interlayer treatment process can be selected according to the importance of the insulation requirement. In order to further improve the vacuum insulation performance of the needle tube part 10 with higher requirements, as a preferable scheme, the transition sleeve 3 can be arranged in the vacuum base body cover 7, so that the needle tube part 10 can meet the corresponding vacuum insulation performance requirements, the iterative action of the vacuum insulation layer of the handle part 20 is fully utilized, and further, other parts of the human body in the non-treatment area are not influenced by the medium temperature.

It can be understood that the "connection" between the associated members constituting the vacuum insulation and the "communication" between the associated members constituting the medium conduction relation are sealing connections satisfying the requirements of the corresponding functions, and are not described herein again.

In order to further improve the convenience of product processing and assembly, the transition sleeve 3 and the vacuum base body cover 7 can adopt a split structure design.

As shown in fig. 2 and 3, the transition sleeve 3 may be composed of an outer pipe transition sleeve 31 and an inner pipe transition sleeve 32. Wherein, the outer pipe transition sleeve 31 is connected with the first vacuum heat-insulating pipe 1, the inner pipe transition sleeve 32 is connected with the first outer layer return pipe 2, and the opposite ends of the outer pipe transition sleeve 31 and the inner pipe transition sleeve 32 are nested and connected. Specifically, the inner wall of the opposite end of the outer pipe transition sleeve 31 is provided with a limit step 311, and the opposite end of the inner pipe transition sleeve 32 is inserted and fitted with the limit step 311; of course, the stop step can be reversely disposed on the inner pipe transition sleeve 32, and the reliable nesting connection between the two opposite ends can also be realized.

As shown in fig. 2, the vacuum base cover 7 may preferably be composed of a cover base 71 and a cover body 72. Wherein the cover base 71 is connected with the second vacuum heat-insulating pipe 5, the cover body 72 is connected with the transition sleeve 3, and opposite ends of the cover base 71 and the cover body 72 are nested and connected. Specifically, the outer peripheral surface of the opposite end of the cover body 72 is provided with a limit step 721, and the opposite end of the cover base 71 is fitted between the limit step 721; similarly, the stop step can be reversely arranged on the cover base 71, and the reliable nesting connection between the two opposite ends can be realized.

On the basis of the split transition sleeve 3 and the vacuum matrix cover 7, the process structure for constructing two independent vacuum heat insulation bodies can be further optimized. Referring to fig. 1 and 2, a vacuum port 312 for vacuum insulation of the non-treatment region B of the needle cannula portion 10 is formed in the sidewall of the outer transition sleeve 31, and an inner recess 321 for receiving a getter is formed in the inner wall of the inner transition sleeve 32 at the opposite end. Wherein the vacuum-pumping port 312 is sealed with glass solder. As further shown in FIG. 2, a vacuum port 711, which is configured to provide vacuum insulation for the handle portion 20, is formed in the sidewall of the cover base 71, and is configured to receive a protective cap after the vacuum operation is completed, and has an inner recess 722 for receiving a getter material on the inner wall of the opposite end of the cover body 72. With this arrangement, the getter is kept in a good vacuum heat insulating state.

In the scheme, the clamping part 51 for connecting with the system pipeline is arranged on the second vacuum heat-insulating pipe 5, as shown in fig. 1, the clamping part 51 is positioned at the position of the second vacuum heat-insulating pipe 5 close to the vacuum base body cover 7, and the clamping part is quickly assembled and disassembled with the system pipeline in a matching way. Correspondingly, the outer peripheral surface of the second vacuum heat-insulating pipe 5 beside the clamping portion 51 is provided with a ring groove 52 for placing the sealing element 8, so that abnormal leakage of the internal medium in the use process is avoided. For example, but not limited to, liquid nitrogen is used as the cooling medium, and absolute ethyl alcohol is used as the heating medium. The preoperative preparation is connected to a quick connector of a cryoablation needle through a pipeline, after the connection is finished, a freezing working medium-liquid nitrogen is output through system control, the liquid nitrogen reaches a treatment area along a working medium inflow pipeline, the temperature of the treatment area is reduced to about-196 ℃, and the liquid nitrogen flows out along a working medium return pipeline. When the treatment time is up, the needle point (treatment area) of the needle tube part 10 forms a large enough ice ball, the freezing working medium is closed through system control, the thermotherapy working medium-absolute ethyl alcohol is output, the circulation is performed according to the pipeline, the temperature of the treatment area reaches about 75 ℃, the ice ball frozen by the organism tissue is rapidly thawed, and the lesion tissue is completely necrotized under the alternating action of cold and heat, thereby achieving the treatment purpose. In the treatment process, due to the independent vacuum interlayer of the needle tube part and the vacuum interlayer at the handle, the normal body tissues of the patient and the user are prevented from being frostbitten.

It should be noted that the needle cannula 10 and the handle 20 are preferably made of medical grade stainless steel and are generally straight, and obviously, the shape is designed only for the convenience of operation without loss of generality, and the core invention of the present embodiment is not limited to the shape shown in the drawings.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A cryoablation needle comprising a needle cannula portion (10) and a handle portion (20) sealingly connected to form a medium inlet and return flow path; it is characterized in that the preparation method is characterized in that,

one end of a first vacuum heat-insulation pipe (1) of the needle tube part (10) is connected with the initial end of a first outer layer return pipe (2) of the needle tube part, and the other end of the first vacuum heat-insulation pipe (1) is connected with the tail end of the first outer layer return pipe (2) through a transition sleeve (3) so as to construct vacuum heat insulation of a non-treatment area of the needle tube part (10);

one end of a second vacuum heat-insulation pipe (5) of the handle part (20) is connected with the tail end of a second outer layer return pipe (6) of the handle part, and the other end of the second vacuum heat-insulation pipe (5) is connected with a transition sleeve (3) of the needle tube part (10) through a vacuum substrate cover (7) to construct vacuum heat insulation of the handle part (20);

the inner layer inflow pipe (4) is inserted into the first outer layer return pipe (2) and the second outer layer return pipe (6) which are communicated with each other, so that a medium inflow passage and a medium return passage are formed.

2. The cryoablation needle according to claim 1, wherein the transition sheath (3) is built into the vacuum base housing (7), the transition sheath (3) comprising:

an outer pipe transition sleeve (31) connected to the first vacuum insulation pipe (1); and

the inner pipe transition sleeve (32) is connected with the first outer layer return pipe (2);

wherein opposite ends of the outer pipe transition sleeve (31) and the inner pipe transition sleeve (32) are nested and connected.

3. The needle of claim 2, wherein the inner wall of the outer transition sleeve (31) at the opposite end is provided with a stop step (311), and the inner transition sleeve (32) at the opposite end is fitted between the stop step (311) provided at the inner wall of the outer transition sleeve (31) at the opposite end.

4. The needle assembly of claim 3, wherein a vacuum port (312) for vacuum insulation of the non-treatment region of the needle cannula portion (10) is formed in a side wall of the outer transition sleeve (31), and an inner wall of the inner transition sleeve (32) at an opposite end thereof has an inner recess (321) for receiving a getter.

5. The cryoablation needle according to claim 4, wherein the vacuum port (312) is sealed with a glass solder.

6. The cryoablation needle according to any of the claims 1 to 5, wherein the vacuum matrix cover (7) comprises:

a cover base (71) connected to the second vacuum heat-insulating pipe (5); and

the cover body (72) is connected with the transition sleeve (3);

wherein the opposite ends of the cover base (71) and the cover body (72) are nested.

7. The cryoablation needle as recited in claim 6, wherein the opposite end outer circumferential surface of the cover body (72) is provided with a stopper step (721), and the opposite end of the cover base (71) is fitted between the stopper step (721) provided on the opposite end outer circumferential surface of the cover body (72).

8. The cryoablation needle according to claim 7, wherein a vacuum port (711) constituting a vacuum insulation of the handle portion (20) is located in a side wall of the cover base (71), and an inner wall of an opposite end of the cover body (72) has an inner recess (722) capable of receiving a getter.

9. The needle according to claim 1, wherein the second vacuum insulation tube (5) is provided with a clamping part (51) near the vacuum substrate cover (7) for adapting connection with a system pipeline.

10. The needle of claim 9, wherein the outer peripheral surface of the second vacuum heat-insulating tube (5) beside the clamping portion is provided with a ring groove (52) for placing a sealing member (8).