CN209847360U - Split type conductive structure of flexible cryoablation needle - Google Patents

Abstract

The utility model provides a split type conductive structure of a flexible cryoablation needle, which comprises an electric wire, an extension line, a first conduction assembly, a second conduction assembly and an electric wire channel, wherein the first conduction assembly is arranged on the side wall of a joint structure of the flexible cryoablation needle, and the second end of the electric wire is connected into the joint structure and is in conduction connection with the first conduction structure; the extension line penetrates through the wire channel, and the first end of the extension line penetrates through the first end of the wire channel to be in conduction connection with the second conduction assembly positioned on the inner side of the socket main body; when the connector structure is inserted into the socket body, the first conducting assembly is in contact conduction with the second conducting assembly. The utility model discloses utilize the first contact that switches on subassembly and second to switch on the subassembly and switch on, realized the separation between electric wire and the extension line and be connected. Furthermore, the separation and the connection can be realized through one-time plugging.

Description

Split type conductive structure of flexible cryoablation needle

Technical Field

The utility model relates to the field of medical treatment, especially, relate to a split type conductive structure of flexible cryoablation needle.

Background

In some scenarios of cryotherapy, it is desirable that the inserted cryosurgical probe be flexible to minimize trauma to the tissue during the natural sliding of the cryosurgical probe into the lumen (e.g., respiratory tract, alveoli, esophagus, etc.). The traditional cold knife has the problem that the knife handle is made of metal, so that the aim is difficult to achieve, generally, only destructive puncture can be performed on tissues, and once the tube wall of the cavity is penetrated, the result is always fatal. Therefore, the flexible cryoablation needle has important significance in the treatment of cavity tumors.

In the prior art, the flexible cryoablation needle can be provided with a vacuum passage such as a vacuum interlayer for heat preservation, a thermocouple wire for measuring the temperature of the cutter head, and an electric heating wire for rewarming the cutter head besides air inlet and outlet. However, only the cutter head and the flexible catheter section of the flexible cryoablation needle can be in contact with tumors or normal tissues of a human body, so that the cost of the consumable end can be greatly reduced and the waste can be reduced by only taking the cutter head and the flexible catheter section as disposable sterile consumables and taking the rest handle and the extension tube section as reusable instruments. Therefore, it is desirable to achieve the detachment and attachment of a flexible cryoablation needle.

However, the prior art cannot realize the separation and connection of the wire line in the split type flexible cryoablation needle. And the separation and connection of the electric wire line can not be realized through one-time plugging operation.

SUMMERY OF THE UTILITY MODEL

The utility model provides a split type conductive structure of flexible cryoablation needle to solve the problem that can't realize the separation of electric wire way and be connected in split type flexible cryoablation needle.

According to the utility model discloses an aspect provides a split type conductive structure of flexible cryoablation needle, include: the flexible cryoablation needle comprises an electric wire, an extension wire, a first conduction assembly, a second conduction assembly and an electric wire channel, wherein the first conduction assembly is arranged on the side wall of a joint structure of the flexible cryoablation needle, the electric wire channel is arranged in a socket main body of the flexible cryoablation needle, and a first end of the electric wire channel extends to the inner wall of the socket main body; the cutter head structure and the cutter head catheter structure of the flexible cryoablation needle are sequentially connected with the joint structure, and the joint structure can be inserted into the socket main body;

the wire penetrates through the cutter head guide pipe structure, a first end of the wire extends to the cutter head structure, and a second end of the wire is connected into the joint structure and is in conduction connection with the first conduction structure; the extension line penetrates through the wire channel, and the first end of the extension line penetrates through the first end of the wire channel to be in conduction connection with the second conduction assembly positioned on the inner side of the socket main body;

when the connector structure is inserted into the socket body, the first conducting assembly is in contact conduction with the second conducting assembly.

Optionally, the first conduction assembly comprises a pin hole formed in the side wall of the joint structure and a pin arranged in the pin hole, the pin is connected with the second end of the wire in a conduction mode, the joint structure is inserted into the socket body, and the pin is in contact conduction with the second conduction assembly.

Optionally, the contact pin includes the inserted part with connect in the head of inserted part one end, the inserted part inserts the contact pin hole, the inserted part with the second end turn-on connection of electric wire, the head is located outer wall one side of joint design, when joint design inserts socket main body, the head with the second switches on the subassembly contact and switches on.

Optionally, the first subassembly that switches on still includes insulating sleeve and insulating coating, the pore wall of pinhole is located to insulating sleeve, insulating coating coat in the head with between the outer wall of joint design.

Optionally, the second conduction assembly comprises a conductive elastic sheet fixedly arranged on the socket main body, the conductive elastic sheet is in conduction connection with the first end of the extension line, and when the joint structure is inserted into the socket main body, the conductive elastic sheet can be in contact conduction with the first conduction assembly.

Optionally, the conductive elastic sheet is mounted in an elastic sheet groove formed in the socket main body.

Optionally, the second conducting assembly includes a conducting ring; the conducting ring is arranged on the outer side of the joint structure in a surrounding mode, the conducting ring is in conducting connection with the first end of the extension line, and when the joint structure is inserted into the socket main body, the conducting ring can be in contact conduction with the first conducting assembly.

Optionally, the conductive ring is mounted on a base, and the base can be matched with the joint structure and/or the socket body.

Optionally, the electric wire includes a thermocouple wire and a reheating heating wire, the extension line includes a thermocouple extension line and a reheating heating extension line, the thermocouple wire and the thermocouple extension line can be conducted with the second conduction assembly through the corresponding first conduction assembly, and the reheating heating wire and the reheating heating extension line can be conducted with the second conduction assembly through the corresponding first conduction assembly.

Optionally, the tool bit catheter structure includes an inner tube assembly, the front end of the inner tube assembly is connected to the rear end of the tool bit structure, the J-T groove structure of the flexible cryoablation needle sequentially penetrates through the inner tube assembly, the joint structure and the socket main body, the J-T groove structure is connected to the inner cavity of the tool bit structure, and the electric wire is arranged in a penetrating manner in a gap between the outside of the J-T groove structure and the inside of the inner tube assembly.

The utility model provides a split type conductive structure of flexible cryoablation needle, because electric wire, extension line, electric wire passageway, first subassembly, the second that switches on the setting of subassembly, usable first subassembly and the contact that the second switched on the subassembly switches on, realized separation and being connected between electric wire and the extension line. Furthermore, the separation and the connection can be realized through one-time plugging.

The utility model discloses in the alternative, because the electric wire extends to the tool bit structure, the electric wire of thermocouple line and rewarming heater wire for example can directly act on to the position that is close to the tool bit structure, and then, can be so that the control by temperature change monitoring to and rewarming can directly realize to the work area of tool bit, the hysteresis quality of having avoided the control by temperature change monitoring and the uncertainty of difference in temperature scope, effectively improved the precision that the thermocouple detected, and effectively promoted the rewarming effect. Meanwhile, as the thermocouple wire extends to the cutter head structure, the thermocouple can be directly arranged near the cutter head structure, and the temperature of tumor tissues at the position of the cutter head can be monitored in real time in a targeted manner.

Drawings

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

Fig. 1 is a schematic structural view of a flexible cryoablation needle according to an embodiment of the present invention;

fig. 2 is a schematic end view of a joint structure according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of section A-A of FIG. 2;

fig. 4 is a schematic end view of a socket body according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of section B-B of FIG. 4;

FIG. 6 is a schematic structural view of section C-C of FIG. 5;

FIG. 7 is an enlarged view of a portion of the area D in FIG. 5;

fig. 8 is a schematic structural view of a conductive elastic sheet according to an embodiment of the present invention;

fig. 9 is an end view of another embodiment of a jack body;

FIG. 10 is a schematic structural view of section E-E of FIG. 9;

fig. 11 is a partial schematic view of a flexible cryoablation needle in accordance with an embodiment of the invention.

Description of reference numerals:

1-a tool bit configuration;

2-a tool bit guide tube structure;

21-an inner tube assembly;

22-an outer tube assembly;

3-a socket structure;

31-a socket body;

311-wire channel;

a 32-joint structure;

33-a locking assembly;

4-an electric wire;

41-thermocouple wire;

42-rewarming heating wire;

5-extension line;

51-thermocouple extension wire;

52-rewarming heating extension line;

6-a second conducting component;

61-a conductive spring plate;

611-a spring piece part; 612-plug part

62-a conductive ring;

63-a base;

7-a first pass component;

71-inserting needle;

72-pin holes;

73-an insulating sleeve;

74-insulating coating;

8-J-T groove structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 1 is a schematic structural view of a flexible cryoablation needle according to an embodiment of the present invention.

Referring to fig. 1, the flexible cryoablation needle may include a cutting head structure 1, a cutting head catheter structure 2 connected to a rear end of the cutting head structure 1, and a socket structure 3; the rear end of the cutter head conduit structure 2 can be inserted into the socket structure 3; the socket structure 3 may include: the joint structure 32 and the socket body 31, the joint structure 31 being attachable to the rear end of the bit guide structure 2, and further, the joint structure 32 and the rear end of the bit guide structure 2 being insertable into the socket body 31.

In one embodiment, a vacuum sub-passage may be formed in the bit guide structure 2, and a vacuum sub-passage may be provided in the coupling structure 31 and/or the socket body 31 of the socket structure 3, so that after the bit guide structure 2 is inserted into the socket body 31, the vacuum sub-passages of different structural parts may be communicated to form a vacuum passage that may be communicated to a vacuum pumping assembly located at the rear end of the socket body 31.

In one embodiment, an air return sub-passage may be formed in the tool bit guide structure 2, another air return sub-passage for realizing air return circulation may be further provided in the joint structure 31 and/or the socket main body 31 of the socket structure 3, and further, after the tool bit guide structure 2 is inserted into the socket main body 31, the air return sub-passages of different structural parts may be communicated to form the air return passage. The air return passage may be communicated to the relevant components of the air return process at the rear end of the socket body 31.

In one embodiment, the air inlet may be provided by a J-T slot structure, which may sequentially pass through the tool bit conduit structure 2, the connector structure 32, and the socket body 31, and then extend to an inner cavity in the tool bit structure 1 to provide the air inlet.

The present embodiment provides a split conductive structure of a flexible cryoablation needle, and the following description of the joint structure, the hub body, the blade structure, and the blade catheter structure can be understood with reference to the foregoing examples. It can be seen that the above description can form a split type flexible cryoablation needle, in which the conductive structure may be split or not, and this embodiment provides a solution for the split type conductive structure.

Meanwhile, as long as the split conductive structure mentioned later is realized in the structural form of the joint structure, the socket body, the tool bit structure, and the tool bit guide structure, no matter whether the vacuum passage, the air return passage, and the like mentioned earlier are realized, and no matter how the passages are realized, the description of the present embodiment is not deviated.

Referring to fig. 1, the split conductive structure of the flexible cryoablation needle includes: the flexible cryoablation needle comprises an electric wire 4, an extension wire 5, a first conduction assembly 7, a second conduction assembly 6, and an electric wire channel 311, wherein the first conduction assembly 7 is arranged on the side wall of a joint structure 32 of the flexible cryoablation needle, the electric wire channel 311 is arranged on a socket body 31 of the flexible cryoablation needle, and a first end of the electric wire channel 311 extends to the inner wall of the socket body 31; the cutter head structure 1 and the cutter head catheter structure 2 of the flexible cryoablation needle are sequentially connected with the joint structure 32, and the joint structure 32 can be inserted into the socket main body 31. The second end of the wire passage 311 may extend to the rear end surface of the socket main body 31.

The electric wire 4 is arranged in the cutter head conduit structure 2 in a penetrating way, and a first end of the electric wire 4 extends to the cutter head structure 1, particularly can extend to an inner cavity of the cutter head structure 1, and can extend to be level with the tail end of a J-T groove structure in the cutter head structure; the second end of the electric wire 4 is connected to the joint structure 32 and is conductively connected to the first conductive structure 7; the extension line 5 is inserted into the wire channel 311, and a first end of the extension line 5 passes through a first end of the wire channel 311 and is conductively connected to the second conduction assembly 6 located inside the socket main body 31. The second end of the extension line 5 can extend out of the rear end of the socket main body 31 through the second end of the wire passage 311.

When the connector structure 32 is inserted into the socket body 31, the first conducting assembly 7 is in contact with the second conducting assembly 6.

The joint structure 31 can be understood as a structural portion suitable for realizing the contact conduction of the conducting components, and further, the structural form of the joint structure 31 can be arbitrarily changed for realizing the actions of air return, vacuum passage, air intake, sealing, etc. mentioned above, without departing from the description of the embodiment.

The socket body 32 is understood to be a component which is adapted to be plugged into the connector structure 32 and the tool-bit duct structure 2 and to allow electrical and/or air communication with the components associated with the rear end side.

The first conduction assembly 7 and the second conduction assembly 6 are conducted through contact, so that the connection and the separation can be completed in one plugging.

It is thus clear that owing to the setting of electric wire, extension line, electric wire passageway, first subassembly, the second that switches on, usable first subassembly and the contact that the second switched on the subassembly switch on, realized the separation between electric wire and the extension line and be connected. Wherein, still can realize separation and connection through once plug.

In one embodiment, the electric wire 4 includes a thermocouple wire and a reheating heating wire, the extension wire includes a thermocouple extension wire and a reheating heating extension wire, the thermocouple wire and the thermocouple extension wire can be conducted with the second conducting assembly through the corresponding first conducting assembly, and the reheating heating wire and the reheating heating extension wire can be conducted with the second conducting assembly through the corresponding first conducting assembly.

Because the electric wire extends to the tool bit structure, for example, the electric wire of thermocouple line and rewarming heater wire can direct action to the position that is close to the tool bit structure, and then, can make the control by temperature change monitoring to and rewarming can directly be realized to the work area of tool bit, avoided the hysteresis quality of control by temperature change monitoring and the uncertainty of difference in temperature scope, effectively improved the precision that the thermocouple detected, and effectively promoted the rewarming effect.

Fig. 2 is a schematic end view of a joint structure according to an embodiment of the present invention; fig. 3 is a schematic structural view of a section a-a in fig. 2.

Referring to fig. 2 and 3, the first conductive assembly 7 includes a pin hole 72 disposed on a side wall of the connector structure, and a pin 71 disposed in the pin hole 72, the pin 71 is conductively connected to the second end of the electric wire 4, and when the connector structure 32 is inserted into the socket main body 31, the pin 71 is in contact conduction with the second conductive assembly 6.

The electrical line 4 may for example comprise a thermocouple wire 41 and a reheating wire 42, the reheating wire 42 also being understood as a reheating wire. In one embodiment, the thermocouple wires 41 may include a thermocouple constantan wire and a thermocouple copper wire. Corresponding mating pins 71 may also be provided, for example, similar materials, or materials suitable for connection, may be used. Meanwhile, the material of the pin 71 may not change with the thermocouple wire 41.

In one embodiment, the electrical wire 4 may include two reheating wires 42 and two thermocouple wires 41, and the two thermocouple wires 41 may be, for example, a thermocouple constantan wire and a thermocouple copper wire.

The rear end of the thermocouple wire 41 can be divided into two wires, namely, a thermocouple constantan wire and a thermocouple copper wire, wherein the thermocouple constantan wire can be inserted into the corresponding contact pin and welded, the surface near the contact pin hole 72 of the joint structure 32 can be coated with an insulating coating 74, and the contact pin hole 72 can be plugged with an insulating sleeve 73 and bonded with each other; after the pins 71 are inserted into the pin holes 72 and bonded to each other, only the round heads, i.e., the heads thereof, are exposed at the outer sides, and the combined action of the insulating coating 74 and the insulating sleeve 73 ensures that the pins 72 corresponding to the constantan wires of the thermocouple are not conducted with the other parts of the joint structure 32. The thermocouple copper wire and the rewarming heating wire are also connected as described above for the thermocouple copper wire.

It can be seen that, in the embodiment shown in fig. 3, the pin 71 includes an insertion portion and a head portion connected to one end of the insertion portion, the insertion portion is inserted into the pin hole, the insertion portion is conductively connected to the second end of the electric wire 4, the head portion is located on the outer wall side of the joint structure 32, and when the joint structure 32 is inserted into the socket main body 31, the head portion is in contact with the second conductive component 6.

The first conduction assembly 7 further comprises an insulating sleeve 74 and an insulating coating 73, the insulating sleeve 73 is arranged on the hole wall of the pin hole 72, and the insulating coating 73 is coated between the head and the outer wall of the joint structure 32. The position of its application can be designed arbitrarily according to its insulating effect.

Fig. 4 is a schematic end view of a socket body according to an embodiment of the present invention; FIG. 5 is a schematic structural view of section B-B of FIG. 4; FIG. 6 is a schematic structural view of section C-C of FIG. 5; fig. 7 is a partially enlarged view of a region D in fig. 5.

Referring to fig. 4 to 7, the second conductive assembly 6 includes a conductive elastic sheet 61 fixedly disposed on the socket main body 31, the conductive elastic sheet 61 is conductively connected to the first end of the extension cord 5, and when the joint structure 32 is inserted into the socket main body 31, the conductive elastic sheet 61 can be in contact with the first conductive assembly 7, and specifically can be in contact with the head of the contact pin 71.

In the specific implementation process, the distribution of the conductive elastic pieces 61 can be as shown in fig. 6.

The extension line 5 may, for example, comprise a thermocouple extension line 51 and a reheating extension line 52, wherein the reheating extension line 52 may also be understood as a reheating wire. In a specific implementation process, the thermocouple extension 51 may specifically include a thermocouple constantan extension and a thermocouple copper extension. Correspondingly, a matching conductive spring 61 may also be provided, for example, a similar material or a material suitable for connection. Meanwhile, the material of the conductive elastic sheet 61 may not change along the thermocouple extension line 51.

In a specific implementation, the extension 5 may include two reheating extension 52 and two thermocouple extensions 51, wherein the two thermocouple extensions may be, for example, a thermocouple constantan extension and a thermocouple copper extension. Correspondingly, 3 copper conductive elastic sheets and one constantan conductive elastic sheet can be respectively distributed along the clockwise direction, three copper conductive elastic sheets can be respectively used for being connected with two rewarming heating extension lines 52 and a thermocouple copper extension line, and one constantan conductive elastic sheet can be connected with the thermocouple constantan extension line. The connection referred to above may be, for example, welding.

Fig. 8 is a schematic structural diagram of a conductive elastic sheet according to an embodiment of the present invention.

Referring to fig. 7 and 8, the conductive elastic piece 61 may be installed in an elastic piece groove formed in the socket main body 31. In one embodiment, the conductive elastic piece 61 may include an elastic piece portion 611 for electrically contacting with the pin 71, and the conductive elastic piece 61 may further include a plug portion 612 for being inserted into the elastic piece groove for fixing the position of the conductive elastic piece 61. The extension 5 may be welded to the elastic piece portion 611 or welded to the insertion portion 612.

After the wire passage 311 penetrates the extension line 5, glue can be filled in to realize sealing, so that the cold medium in the air return passage is prevented from leaking out of the knife.

In the specific implementation process, after the tool bit guide pipe structure 2 is inserted into the socket structure 3 and locked by the locking assembly 33, the 3 copper contact pins 71 and the one constantan contact pin 71 can be respectively contacted with the 3 copper conductive elastic pieces 61 and the constantan conductive elastic piece 61, and the contact is firm due to the elasticity of the conductive elastic pieces, so that the conduction between the reheating heating wire and the reheating heating extension wire, the conduction between the thermocouple constantan wire and the thermocouple constantan extension wire, and the conduction between the thermocouple copper wire and the thermocouple copper extension wire can be realized.

In addition to the above way of implementing conductive connection through the conductive elastic sheet, in the following embodiments, a way of implementing contact conduction by using the conductive ring is also provided.

Fig. 9 is an end view of another embodiment of a jack body; fig. 10 is a schematic structural view of a section E-E in fig. 9.

Referring to fig. 9 and 10, the second conducting element 6 includes a conductive ring 62; the conductive ring 62 is disposed around the connector structure 32, the conductive ring 62 is electrically connected to the first end of the extension cord 5, and when the connector structure 32 is inserted into the socket body 31, the conductive ring 62 can be electrically connected to the first conductive member 7, for example, electrically connected to the pin 71.

Wherein the conductive ring 62 is mounted to a base 63, the base 63 can be assembled with the socket body 31 and/or the joint structure 32, or can be integrated or fixedly connected with any one of them. The mating fitting may, for example, have an outer surface adapted to mate, and the base 63 may be of a plastic material.

If the extension 5 may include two reheating extension 52 and two thermocouple extension 51, the two thermocouple extensions 51 may be, for example, a thermocouple constantan extension and a thermocouple copper extension; then: the above description relates to conductive rings that may include 3 conductive rings 62 of copper and one conductive ring 62 of constantan.

In the specific implementation process, the copper thermocouple extension 51 and the two reheating extension 52 are respectively welded with a copper conducting ring 62, and the constantan thermocouple extension 51 can be welded with a constantan conducting ring 62. The base 63, the conductive ring 62 and the joint structure 32 can be inserted into the socket body 31 as a whole and fixed by glue. In this case, only two wire channels 311 need to be disposed in the socket main body 31, for example, two re-warming heating extension lines 52 can be routed through the upper wire channel in fig. 10, a thermocouple copper extension line and a thermocouple constantan extension line can be routed through the lower wire channel 311, and after wiring in the wire channels 311, glue needs to be poured and sealed.

Referring to fig. 9, four pins 71 are axially distributed along the connector structure 32, and a copper pin 71, a constantan pin 71 and a copper pin 71 are distributed from front to back, respectively, and the insulation manner of the pins can be realized by referring to the insulation coating 74 and the insulation sleeve 73 mentioned above.

The 2 nd pin 71 and the 4 th pin 71 can be respectively welded with the two rewarming heating wires 52, and the 1 st pin 71 and the third pin 71 can be respectively welded with a thermocouple copper wire and a thermocouple constantan wire. Two wires with the same function can be arranged in a spaced mode, and two pins which are adjacent in the axial direction are pins for connecting the thermocouple wire 41 and the reheating wire 42 respectively, so that short circuit caused by too close distance can be avoided.

After plugging, the 4 pins 71 are respectively contacted with the corresponding 4 conductive rings 63, and since the conductive rings 63 are annular structures, the insertion direction of the bit guide structure 2 is not limited by the solution.

Fig. 11 is a partial schematic view of a flexible cryoablation needle in accordance with an embodiment of the invention.

Referring to fig. 11, the cutter head catheter structure 2 includes an inner tube assembly 21, the front end of the inner tube assembly 21 is connected to the rear end of the cutter head structure 1, the J-T groove structure 8 of the flexible cryoablation needle sequentially passes through the inner tube assembly 21, the joint structure 31 and the socket body 32, the J-T groove structure 8 is connected to the inner cavity of the cutter head structure 1, and the electric wire 4 is inserted into the gap between the outside of the J-T groove structure 8 and the inside of the inner tube assembly 21.

This gap is also to be understood as the return air gap of the inner chamber, which is to be understood as a return air sub-passage referred to above.

In addition, the tool bit guiding structure 2 may also include an outer tube component 22, the outer tube component 22 may be disposed outside at least a portion of the inner tube component 21, the front section of the outer tube component 22 is also connected to the tool bit structure 1, in an embodiment, the rear end of the outer tube component 22 may be connected to an insertion body, and then the insertion body is inserted into the socket structure 3.

To sum up, the utility model provides a split type conductive structure of flexible cryoablation needle, because electric wire, extension line, electric wire channel, the first subassembly that switches on, the setting that the second switched on the subassembly, usable first subassembly that switches on with the contact of second subassembly, realized separation and being connected between electric wire and the extension line. Wherein, still can realize separation and connection through once plug.

The utility model discloses in the alternative, because the electric wire extends to the tool bit structure, the electric wire of thermocouple line and rewarming heater wire for example can directly act on to the position that is close to the tool bit structure, and then, can be so that the control by temperature change monitoring to and rewarming can directly realize to the work area of tool bit, the hysteresis quality of having avoided the control by temperature change monitoring and the uncertainty of difference in temperature scope, effectively improved the precision that the thermocouple detected, and effectively promoted the rewarming effect. Meanwhile, as the thermocouple wire extends to the cutter head structure, the thermocouple can be directly arranged near the cutter head structure, and the temperature of tumor tissues at the position of the cutter head can be monitored in real time in a targeted manner.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A split type conductive structure of a flexible cryoablation needle is characterized by comprising an electric wire, an extension line, a first conduction assembly, a second conduction assembly and an electric wire channel, wherein the first conduction assembly is arranged on the side wall of a joint structure of the flexible cryoablation needle, the electric wire channel is arranged on a socket main body of the flexible cryoablation needle, and a first end of the electric wire channel extends to the inner wall of the socket main body; the cutter head structure and the cutter head catheter structure of the flexible cryoablation needle are sequentially connected with the joint structure, and the joint structure can be inserted into the socket main body;

the wire penetrates through the cutter head guide pipe structure, a first end of the wire extends to the cutter head structure, and a second end of the wire is connected into the joint structure and is in conduction connection with the first conduction structure; the extension line penetrates through the wire channel, and the first end of the extension line penetrates through the first end of the wire channel to be in conduction connection with the second conduction assembly positioned on the inner side of the socket main body;

when the connector structure is inserted into the socket body, the first conducting assembly is in contact conduction with the second conducting assembly.

2. The structure of claim 1, wherein the first conducting assembly includes a pin hole formed in a sidewall of the connector structure and a pin inserted into the pin hole, the pin is in conductive connection with the second end of the electrical wire, and when the connector structure is inserted into the socket body, the pin is in contact with the second conducting assembly for conducting.

3. The structure as claimed in claim 2, wherein the pin includes an insertion portion and a head portion connected to one end of the insertion portion, the insertion portion is inserted into the pin hole, the insertion portion is conductively connected to the second end of the electric wire, the head portion is located on an outer wall side of the joint structure, and the head portion is in contact with the second conductive member when the joint structure is inserted into the socket body.

4. The structure of claim 3, wherein the first conducting assembly further comprises an insulating sleeve and an insulating coating, the insulating sleeve is disposed on the hole wall of the pin hole, and the insulating coating is applied between the head and the outer wall of the joint structure.

5. The structure of any one of claims 1 to 4, wherein the second conducting assembly includes a conductive elastic piece fixedly disposed on the socket main body, the conductive elastic piece is conductively connected to the first end of the extension line, and when the joint structure is inserted into the socket main body, the conductive elastic piece can be in contact with the first conducting assembly for conduction.

6. The structure of claim 5, wherein the conductive spring is mounted in a spring slot formed in the socket body.

7. The structure of claim 5, wherein the second conducting member comprises a conductive ring; the conducting ring is arranged on the outer side of the joint structure in a surrounding mode, the conducting ring is in conducting connection with the first end of the extension line, and when the joint structure is inserted into the socket main body, the conducting ring can be in contact conduction with the first conducting assembly.

8. The structure of claim 7, wherein the conductive loop is mounted to a base that can be matingly fitted with the joint structure and/or the socket body.

9. The structure of any one of claims 1 to 4, wherein the electrical wires comprise a thermocouple wire and a reheating wire, the extension wires comprise a thermocouple extension wire and a reheating extension wire, the thermocouple wire and the thermocouple extension wire can be conducted through corresponding first conducting components and second conducting components, and the reheating wire and the reheating extension wire can be conducted through corresponding first conducting components and second conducting components.

10. The structure of any one of claims 1 to 4, wherein the cutter head catheter structure comprises an inner tube assembly, a front end of the inner tube assembly is connected to a rear end of the cutter head structure, the J-T groove structure of the flexible cryoablation needle sequentially passes through the inner tube assembly, the joint structure and the socket body, the J-T groove structure is connected to an inner cavity of the cutter head structure, and the electric wire is arranged in a gap between the outside of the J-T groove structure and the inner tube assembly.