Cryoablation needle

Abstract

The present invention relates to a cryoablation needle, and to the technical field of medical devices. The cryoablation needle of the present invention comprises a needle and a post-needle pipeline, one end of the post-needle pipeline is connected to the needle through a first joint; wherein the first joint comprises a first connector and a second connector that can be detachably fixedly connected, and the needle is arranged on the first connector; the post-needle pipeline comprises a metal corrugated outer tube, a medium delivery tube located in the metal corrugated outer tube, and a host connection end, and the two ends of the metal corrugated outer tube are respectively connected to the second connector and the host connection end; the metal corrugated outer tube, the second connector and the host connection end form a vacuum chamber. The cryoablation needle of the present invention is convenient for users to replace needles, saves pre-operative preparation time, and improves efficiency.

Description

[0001] This application is a divisional application with application number CN201711203347.6 and invention name “Connector, Cryoablation Needle and Cryoablation Treatment Device”. Technical Field

[0002] The present invention relates to the technical field of medical devices, and more specifically, to a cryoablation needle. Background Art

[0003] Most of the devices used for surgery and physical examinations in the pharmaceutical industry are equipped with pipelines, but the pipelines are disposable and need to be replaced with new ones before each use. For example, a cryoablation treatment device includes a cryoablation needle and a host that provides a low-temperature medium for cryoablation surgery. The cryoablation needle includes a needle and a post-needle pipeline connected to the needle, and the post-needle pipeline is fixedly connected to the host. The cryoablation needle is a disposable consumable. A new cryoablation needle must be replaced for each surgery, and each replacement requires the new cryoablation needle to be fixedly connected and sealed to the above-mentioned host, which is cumbersome to assemble and time-consuming. In addition, the entire cryoablation needle needs to be replaced after each ablation surgery, which is a serious waste.

[0004] Therefore, it is an urgent problem to be solved by those skilled in the art to facilitate the replacement of disposable pipes in devices used for surgery and physical examinations in the medical industry and improve efficiency. Summary of the invention

[0005] In view of this, the present invention provides a connector having a first connector and a second connector that are fixedly connected, and the two connectors can be disassembled, so that users can assemble new pipelines by disassembling the connectors, saving time and improving efficiency. The present invention also provides a cryoablation needle, which uses the above connector to facilitate needle replacement and avoid replacing the entire cryoablation needle for each operation. The present invention also provides a cryoablation treatment device, whose main unit and cryoablation needle are connected by the above connector, so that users can disassemble and assemble the cryoablation needle.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A connector, comprising:

[0008] A first connector, wherein the first connector is provided with a first medium channel;

[0009] A second connector, wherein the second connector is provided with a second medium channel;

[0010] Wherein, the first connector and the second connector are detachably fixedly connected; when the first connector and the second connector are fixedly connected, the first medium channel is communicated with the second medium channel, and the first medium channel and the second medium channel are sealed at the connection.

[0011] Preferably, in the above connector, the first connector comprises:

[0012] A first shell, wherein the inner wall of the first shell is provided with a first heat insulating sleeve;

[0013] A first plug is arranged in the first housing; and the first medium channel is arranged on the first plug.

[0014] Preferably, in the above connector, the second connector comprises:

[0015] A second outer shell, wherein the inner wall of the second outer shell is provided with a second heat insulating sleeve;

[0016] The second plug is arranged in the second housing; the second medium channel is arranged on the second plug; the second plug is butted with the first plug, and a sealing gasket is sandwiched between the second plug and the first plug.

[0017] Preferably, in the above-mentioned joint, a connecting pin is provided on the first shell, and a labyrinth mounting groove cooperating with the connecting pin is provided on the second shell; the connecting pin can slide to the end along the opening of the labyrinth mounting groove.

[0018] Preferably, in the above-mentioned connector, at least one of the first connector and the second connector is provided with an elastic member, the elastic member is connected to the housing and the plug of the connector, and the elastic member applies a force to drive the plug to move out of the housing.

[0019] Preferably, in the above-mentioned joint, the first connector and the second connector are threadedly connected.

[0020] Preferably, in the above-mentioned joint, a receiving groove is provided at the end of the first plug, the second plug is inserted into the receiving groove, and the sealing gasket is located in the receiving groove.

[0021] Preferably, in the above joint, there are two first medium channels, one for inflow and the other for return flow; there are two second medium channels, one for inflow and the other for return flow; wherein the first medium channel for inflow is connected to the second medium channel for inflow; the first medium channel for return flow is connected to the second medium channel for return flow;

[0022] Alternatively, the number of the first medium channel and the number of the second medium channel are each one.

[0023] A cryoablation needle comprises a needle and a post-needle pipeline, one end of the post-needle pipeline is connected to the needle through a first connector; the first connector is the connector described in any one of the above technical solutions.

[0024] A cryoablation treatment device comprises a main body and a cryoablation needle connected to the main body via a second connector, wherein the second connector is the connector described in any one of the above technical solutions.

[0025] The present invention provides a joint, which includes a first connector and a second connector; the first connector is provided with a first medium channel; the second connector is provided with a second medium channel; wherein the first connector and the second connector are fixedly connected in a detachable manner; when the first connector and the second connector are fixedly connected, the first medium channel is connected to the second medium channel, and the connection between the first medium channel and the second medium channel is sealed.

[0026] The connector has a first connector and a second connector that are fixedly connected, and the two connectors are detachable. When used in pipelines, users can install the two connectors as needed to replace new pipelines. The operation is convenient, time can be saved, and efficiency can be improved.

[0027] The present invention also provides a cryoablation needle, which uses the above-mentioned connector to facilitate replacement of disposable needles and improve efficiency.

[0028] The present invention also provides a cryoablation treatment device, wherein a main unit and a cryoablation needle are connected via the above-mentioned connector, so that the user can easily detach and assemble the cryoablation needle from the main unit, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a joint provided in an embodiment of the present invention;

[0031] Figure 2 An assembly diagram of a first housing and a first heat insulation sleeve provided in an embodiment of the present invention;

[0032] Figure 3 An assembly diagram of a second heat insulating sleeve and a metal corrugated tube provided in an embodiment of the present invention;

[0033] Figure 4 A cross-sectional view of a joint having two first medium channels and two second medium channels provided in an embodiment of the present invention;

[0034] Figure 5 A cross-sectional view of a joint having one first medium channel and one second medium channel provided in an embodiment of the present invention;

[0035] Figure 6 A schematic diagram of the structure of a cryoablation needle provided in an embodiment of the present invention;

[0036] in, Figure 1-Figure 6 middle:

[0037] First connector 100; connecting pin 101; first housing 102; first heat-insulating sleeve 103; first plug 104; second connector 200; second heat-insulating sleeve 201; metal corrugated tube 202; second plug 203; second joint 1; metal corrugated outer tube 2; first joint 3; needle 4. DETAILED DESCRIPTION

[0038] The embodiment of the present invention discloses a connector, which has a first connector and a second connector that are fixedly connected, and the two connectors can be disassembled, so that the user can assemble a new pipeline by disassembling the connector, saving time and improving efficiency. The embodiment of the present invention also discloses a cryoablation needle, which uses the above connector to facilitate the replacement of the needle and avoid replacing the entire cryoablation needle for each operation. The embodiment of the present invention also discloses a cryoablation treatment device, whose main unit and cryoablation needle are connected by the above connector, so that the user can disassemble and assemble the cryoablation needle.

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 6 The embodiment of the present invention provides a joint, which includes a first connector 100 and a second connector 200; the first connector 100 is provided with a first medium channel; the second connector 200 is provided with a second medium channel; wherein the first connector 100 and the second connector 200 are fixedly connected in a detachable manner; when the first connector 100 and the second connector 200 are fixedly connected, the first medium channel is connected to the second medium channel, and the connection between the first medium channel and the second medium channel is sealed. The gap between the first and second medium channels can be sealed by using a sealing gasket or by providing a mutually matching labyrinth sealing structure on the two connectors. The present embodiment does not limit the form of the seal.

[0041] The connector provided in the embodiment of the present invention has a first connector 100 and a second connector 200 that are fixedly connected, and the two connectors are detachable. When applied to pipelines, users can install the two connectors as needed to replace new pipelines, which is easy to operate, can save time and improve efficiency.

[0042] Specifically, the first connector 100 includes a first housing 102 and a first plug 104; the inner wall of the first housing 102 is provided with a first heat-insulating sleeve 103; the first plug 104 is disposed in the first housing 102; and the first medium channel is disposed on the first plug 104. In the connector provided in this embodiment, the first connector 100 is provided with a first heat-insulating sleeve 103, which can prevent the medium in the first channel from exchanging heat with the outside through the first connector 100, thereby ensuring that the temperature of the medium meets the requirements of subsequent surgery and inspection.

[0043] Specifically, the first heat insulating sleeve 103 is sandwiched between the first plug 104 and the first housing 102 .

[0044] The second connector 200 comprises a second shell and a second plug 203; the inner wall of the second shell is provided with a second heat insulating sleeve 201; the second plug 203 is arranged in the second shell; the second medium channel is arranged on the second plug 203; the second plug 203 is docked with the first plug 104, and a sealing gasket is sandwiched between the second plug 203 and the first plug 104.

[0045] In the connector provided in this embodiment, a second heat insulating sleeve 201 is provided in the second connector 200, which can prevent the medium in the second channel from exchanging heat with the outside through the second connector 200, thereby ensuring that the medium meets the needs of subsequent surgery and inspection.

[0046] Specifically, the second heat insulating sleeve 201 is sandwiched between the second plug 203 and the second housing.

[0047] In order to achieve a fixed connection between the two connectors, in the above connector, a connecting pin 101 is fixed on the first shell 102, and a labyrinth card slot matching the connecting pin 101 is provided on the second shell; the connecting pin 101 can slide to the end along the opening of the labyrinth card slot to fix the two connectors. During assembly, the two connectors are docked, and the connecting pin 101 is aligned with the opening of the labyrinth card slot, and then the connecting pin 101 is slid to the end along the labyrinth card slot. In the connector provided in this embodiment, the connecting pin 101 cooperates with the labyrinth card slot to prevent the connecting pin 101 from falling out of the above labyrinth card slot, ensuring that the two connectors are reliably connected, and the operation is simple, and it is convenient to disassemble and assemble the two connectors.

[0048] Specifically, there are multiple connecting pins 101 , and the connecting pins 101 are evenly distributed along the circumference of the first housing 102 ; accordingly, the number of the labyrinth mounting slots is the same as that of the connecting pins 101 , and they correspond one-to-one to the connecting pins 101 .

[0049] Furthermore, in the above connector, at least one of the first connector 100 and the second connector 200 is provided with an elastic member, and accordingly, the plug in the connector can be slidably arranged in the shell; the elastic member is respectively connected to the shell and the plug of the connector, and the elastic member applies a force to drive the plug to move out of the shell. For example, the second connector 200 is provided with an elastic member, and the elastic member is respectively connected to the second plug 203 and the second shell, and the elastic member applies a force to drive the second plug 203 to move out of the second shell, so that the second plug 203 is always pressed against the first plug 104.

[0050] It can be understood by those skilled in the art that, during the movement of the connecting pin 101 along the maze slot, the contact degree of the two connecting heads changes, and at least one of the two connecting heads is provided with an elastic member, which ensures that the connecting pin 101 can move along the maze slot and ensures that the first plug 104 and the second plug 203 are reliably connected after the two connecting heads are fixedly connected.

[0051] Furthermore, in order to prevent the medium from conducting heat through the elastic member and the shell, the elastic member is arranged to be connected to the plug through a heat insulating sleeve, the heat insulating sleeve and the plug are fixedly connected, and the heat insulating sleeve can be slidably arranged in the shell.

[0052] Specifically, the elastic member is configured as a metal corrugated tube 202, and the metal corrugated tube 202 is welded to the second heat insulation sleeve 201 and the second shell respectively.

[0053] Of course, in the joints provided in the above embodiments, the two connectors can also be configured as threaded connections. Specifically, internal threads and external threads that match each other can be respectively provided on the first shell and the second shell, but in order to ensure that the first medium channel and the second medium channel are connected after the two connectors are assembled, the two connectors are configured to be threadedly connected through a threaded sleeve, such as a threaded sleeve that can rotate around its own axis is provided on the first shell 102, and an external thread that matches the internal thread of the threaded sleeve is provided on the second shell. During assembly, the first connector 3 and the second connector 1 are aligned, and then the threaded sleeve is rotated to make the two connectors press against each other.

[0054] Preferably, in order to ensure that the first medium channel and the second medium channel are connected to each other when the two plugs are connected, in the above-mentioned connector, a groove is provided at the end of the first plug 104, and the second plug 203 is inserted into the above-mentioned groove and pressed against the first plug 104.

[0055] In the connector provided in this embodiment, there are two first media channels, one for inflow and the other for return flow; there are two second media channels, one for inflow and the other for return flow; wherein the first media channel for inflow is connected to the second media channel for inflow; the first media channel for return flow is connected to the second media channel for return flow; or, there are one first media channel and one second media channel respectively, and the first media channel and the second media channel are connected. This embodiment does not limit the number of media channels, which can be set according to the needs of surgery or physical examination.

[0056] The above joint can be used to transmit gaseous medium, liquid medium or medium with gas and liquid coexisting; at the same time, the two connectors of the joint are respectively provided with heat insulation sleeves, which are suitable for transmitting low-temperature medium, such as liquid nitrogen, etc. The above sealing gasket is a thin sheet structure, preferably set as a low-temperature resistant non-metallic material sealing gasket, such as a polytetrafluoroethylene sealing gasket, a PTFE sealing gasket or a polyimide sealing gasket.

[0057] This embodiment also provides a cryoablation needle, which includes a needle 4 and a post-needle pipeline, one end of the post-needle pipeline is connected to the needle 4 through a first connector 3; wherein the first connector 3 is the connector provided in the above embodiment.

[0058] The cryoablation needle provided in this embodiment uses the above-mentioned connector, which is convenient for users to replace the needle 4, saves preoperative preparation time, and improves efficiency. At the same time, the cryoablation needle includes a needle 4 and a post-needle pipeline that can be detached from each other. After each use, only the needle 4 needs to be replaced, and the post-needle pipeline can be reused after disinfection. Compared with a cryoablation needle without a connector, the needle 4 and the post-needle pipeline are an integrated structure, which can save materials and avoid waste.

[0059] Specifically, the post-needle pipeline in the cryoablation needle is connected to the second connector 200 of the first connector 3, and the needle 4 is arranged on the first connector 100 of the first connector 3; the post-needle pipeline includes a metal corrugated outer tube 2, a medium delivery tube and a host connection end; wherein; the two ends of the metal corrugated outer tube 2 are respectively connected to the second connector 200 and the host connection end, one end of the medium delivery tube is connected to the second medium channel, and the other end is connected to the medium channel of the host connection port, and the medium delivery tube is located in the metal corrugated outer tube 2; the metal corrugated outer tube 2, the second connector 200 and the host connection end form a vacuum cavity, which can prevent the medium in the medium delivery tube from exchanging heat with the external environment, ensuring that the medium is maintained at a preset temperature. The first connector 100 in the needle 4 and the main body of the needle 4 also form a vacuum cavity, and the vacuum cavity is connected to the vacuum layer of the needle tip to prevent the medium in the needle from exchanging heat with the external environment.

[0060] The following takes the example of two first medium channels and two second medium channels as an example to specifically introduce the working process of the cryoablation needle:

[0061] The pressurized liquid nitrogen fluid starts from the main unit of the cryoablation treatment device, passes through the medium delivery tube for inlet flow in the post-needle pipeline of the cryoablation needle, the inlet core tube assembly of the needle 4, and reaches the inner cavity of the cryoablation needle tip of the needle 4. After heat exchange, it flows back to the main unit through the medium delivery tube for reflux in the post-needle pipeline. The liquid nitrogen does not come into direct contact with the human body. It is heated and vaporized by the heat exchanger of the main unit to form nitrogen, which is discharged into the atmosphere.

[0062] The host connection end may be configured as the first connection head 100 or the second connection head 200 of the second connector 1 .

[0063] An embodiment of the present invention further provides a cryoablation treatment device, comprising a main body and a cryoablation needle connected to the main body via a second connector 1, wherein the second connector 1 is the connector provided in the above embodiment.

[0064] Specifically, the cryoablation needle may be configured as the cryoablation needle provided in the above-mentioned embodiment.

[0065] In the cryoablation treatment device provided in this embodiment, the cryoablation needle is connected to the main unit via the second connector 1, which is convenient for the user to disassemble and assemble the cryoablation needle from the main unit, thereby improving efficiency. Of course, the cryoablation treatment device provided in this embodiment also has other effects of the connector and cryoablation needle provided in the above embodiments, which will not be described in detail here.

[0066] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cryoablation needle, characterized in that: It comprises a needle (4) and a post-needle pipeline, one end of the post-needle pipeline being connected to the needle (4) via a first connector (3); The first connector (3) comprises a first connector (100) and a second connector (200) which are detachably fixedly connected, and the needle (4) is arranged on the first connector (100); The post-needle pipeline comprises a metal corrugated outer tube (2), a medium delivery tube located inside the metal corrugated outer tube (2), and a host connection end, wherein both ends of the metal corrugated outer tube (2) are respectively connected to the second connection end (200) and the host connection end; The metal corrugated outer tube (2), the second connector (200) and the host connecting end form a vacuum chamber; The first connector (100) comprises a first housing (102) and a first plug (104), the first plug (104) being arranged in the first housing (102), and the second connector (200) comprises a second housing and a second plug (203), the second plug (203) being arranged in the second housing, and the second plug (203) being docked with the first plug (104); a connecting pin (101) is provided on the first housing (102), and a labyrinth mounting groove cooperating with the connecting pin (101) is provided on the second housing, and the connecting pin (101) can slide to the end along the opening of the labyrinth mounting groove; The second connector (200) is provided with an elastic member, the elastic member being connected to the second plug (203) and the second housing respectively, and the elastic member exerting a force to drive the second plug (203) to move out of the second housing, so that the second plug (203) is always in tight contact with the first plug (104); or The first connector (100) is provided with an elastic member, which is respectively connected to the first housing (102) and the first plug (104), and the elastic member applies a force driving the first plug (104) to move out of the first housing (102).

2. The cryoablation needle according to claim 1, characterized in that: The first connector (100) and the main body of the needle (4) form a vacuum cavity, and the vacuum cavity is in communication with the vacuum layer of the needle tip of the needle (4).

3. The cryoablation needle according to claim 2, characterized in that: The host connection end is configured as the first connection end (100) or the second connection end (200).

4. The cryoablation needle according to any one of claims 1 to 3, characterized in that: The medium delivery pipe includes a medium delivery pipe for inflow and a medium delivery pipe for reflux; The needle (4) comprises an inlet core tube assembly and a cryoablation needle tip inner cavity, and the medium delivery tube for inlet flow, the inlet core tube assembly and the cryoablation needle tip inner cavity are in fluid communication; The inner cavity of the cryoablation needle tip is also in fluid communication with the medium delivery tube for reflux; The pressurized liquid nitrogen fluid passes through the medium delivery pipe for inflow and the inflow core tube assembly to reach the inner cavity of the cryoablation needle tip, and flows back through the reflux medium delivery pipe after heat exchange.

5. The cryoablation needle according to any one of claims 1 to 3, characterized in that: The first connecting head (100) is provided with a first medium channel; the second connecting head (200) is provided with a second medium channel; Wherein, when the first connecting head (100) and the second connecting head (200) are fixedly connected, the first medium channel is communicated with the second medium channel, and the first medium channel and the second medium channel are sealed at the connection; One end of the medium delivery pipe is communicated with the second medium channel, and the other end of the medium delivery pipe is communicated with the medium channel of the host connection end.

6. The cryoablation needle according to claim 5, characterized in that: The inner wall of the first housing (102) is provided with a first heat insulating sleeve (103); and the first medium channel is arranged on the first plug (104).

7. The cryoablation needle according to claim 6, characterized in that: The inner wall of the second shell is provided with a second heat insulating sleeve (201); the second medium channel is provided on the second plug (203), and a sealing gasket is sandwiched between the second plug (203) and the first plug (104).

8. The cryoablation needle according to claim 7, characterized in that: The end of the first plug (104) is provided with a receiving groove, the second plug (203) is inserted into the receiving groove, and the sealing gasket is located in the receiving groove.

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