CN219354135U - Electrocoagulation embolic coil system - Google Patents

Abstract

The utility model provides an electric coagulation embolic coil system, comprising a delivery rod; the wire structure penetrates through the conveying rod and is fixedly connected with the proximal end of the conveying rod, and the wire structure comprises a spring core wire and a first insulating wire connected with the spring core wire; the protection piece set up in the distal end of conveyer rod, the protection piece be provided with be used for making the isolated blood flow of spring core silk hold the passageway and with hold the shutoff passageway of passageway intercommunication, the spring core silk accept in hold the passageway, first insulated wire wears to establish shutoff passageway and closure shutoff passageway, under the exogenic action, first insulated wire can stretch out shutoff passageway and drive the spring core silk stretches out shutoff passageway. The electric coagulation embolic coil system solves the problem that the existing electric coagulation embolic assembly cannot be automatically released.

Description

Electrocoagulation embolic coil system

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an electric coagulation embolic coil system.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

The interventional embolism treatment of the aneurysm is a common method for treating the aneurysm, generally, a microcatheter is inserted into the root of the thigh of a patient, and an embolism assembly is placed into the aneurysm cavity of the aneurysm along the microcatheter through a conveying device, so that the embolism is caused in the aneurysm cavity, and the blood flow in the aneurysm is reduced, thereby achieving the purpose of curing the aneurysm.

In the operation of treating the aneurysm by the existing spring ring filling method, the embolism is carried out by using the spring rings only, a plurality of spring rings are needed to achieve the treatment effect, the operation time is long, and the operation cost is high.

Disclosure of Invention

The object of the present utility model is to solve at least one of the above-mentioned problems. The aim is achieved by the following technical scheme:

the present utility model in a first aspect proposes an electro-coagulation embolic coil system comprising:

a conveying rod;

the wire structure penetrates through the conveying rod and is fixedly connected with the proximal end of the conveying rod, and the wire structure comprises a spring core wire and a first insulating wire connected with the spring core wire;

the spring ring is fixedly connected with the distal end of the wire structure;

the protection piece set up in the distal end of conveyer rod, the protection piece be provided with be used for making the isolated blood flow of spring core silk hold the passageway and with hold the shutoff passageway of passageway intercommunication, the spring core silk accept in hold the passageway, first insulated wire wears to establish shutoff passageway and closure shutoff passageway, under the exogenic action, first insulated wire can stretch out shutoff passageway and drive the spring core silk stretches out shutoff passageway.

According to the electric coagulation embolic coil system provided by the utility model, the first insulated wire penetrates through the blocking channel and seals the blocking channel, so that blood is prevented from entering the containing channel from the blocking channel and is broken by electrochemical corrosion with the spring core wire, after electric coagulation embolism is completed, the first insulated wire can extend out of the blocking channel and drive the spring core wire to extend out of the blocking channel under the action of external force, and the spring core wire is a bare wire and is broken by electrochemical corrosion under the action of current and blood, so that the electric coagulation embolic coil system can be automatically broken, when the electric coagulation embolic coil system is used, the spring coil can be firstly released, and then is electrified to be electrically coagulated at the position of the spring coil, and after the electric coagulation is completed, the spring core wire extends out of the blocking channel and is broken by electrochemical corrosion, so that the whole process does not need to additionally increase instruments, the electric coagulation can be realized, the use of the spring coil can be reduced, the operation time can be shortened, and the operation cost can be reduced.

In addition, the electro-coagulation embolic coil system according to the present utility model may have the following additional technical features:

in some embodiments of the present utility model, the protection member includes a first portion and a second portion connected to the first portion, the first portion is a hollow structure, the receiving channel is formed in the hollow structure, and the blocking channel is disposed in the second portion.

In some embodiments of the utility model, the protector is located outside the delivery rod, and the proximal end of the spring core wire is connected to the distal end of the first insulated wire, which is fixedly connected to the distal end of the delivery rod.

In some embodiments of the utility model, the axial length of the first portion is no greater than the axial length of the spring core wire.

In some embodiments of the utility model, the lead structure further comprises a second connecting core wire, a distal end of the second connecting core wire being connected to a proximal end of the first insulated lead, the lead structure being secured to a proximal end of the delivery rod by the second connecting core wire.

In some embodiments of the utility model, the spring ring includes a ball cap portion, a spring portion, and a connecting portion, the connecting portion being disposed at a proximal end of the spring portion, the ball cap portion being disposed at a distal end of the spring portion, the connecting portion sealing off an end of the second portion remote from the first portion.

In some embodiments of the present utility model, the protection member is fixedly disposed in the conveying rod, the second portion is in a tubular structure, the outer periphery of the second portion is attached to the inner wall of the conveying rod, the first portion is disposed in the second portion, and the distal end of the spring core wire is connected with the proximal end of the first insulation wire.

In some embodiments of the utility model, the wire structure further comprises a second insulated wire and a second connecting core wire, a distal end of the second insulated wire is connected to a proximal end of the spring core wire, a proximal end of the second insulated wire is connected to a distal end of the second connecting core wire, and the wire structure is fixed to a proximal end of the delivery rod by the second connecting core wire.

In some embodiments of the utility model, the wire structure further comprises a first connection core wire, a proximal end of the first connection core wire being connected to a distal end of the first insulated wire, the distal end of the first connection core wire being fixedly connected to the spring coil.

In some embodiments of the utility model, the ball cap portion and a portion of the spring portion form a first disc structure when the spring ring is in a released state, and the connecting portion and a portion of the spring portion form a second disc structure, the first disc structure having a diameter that is smaller than a diameter of the second disc structure.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 schematically illustrates a schematic construction of an electro-coagulation embolic coil system in accordance with a first embodiment of the present utility model;

fig. 2 schematically shows an installation schematic of a feed bar and wire arrangement according to a first embodiment of the utility model;

fig. 3 schematically shows an enlarged schematic a according to fig. 2;

fig. 4 schematically shows a schematic cross-section of a protector according to a first embodiment of the utility model;

fig. 5 schematically shows a structural diagram of a wire structure in a first embodiment according to the present utility model;

fig. 6 schematically shows a structural view of the spring coil in a contracted state according to the first embodiment of the present utility model;

FIG. 7 schematically illustrates a first view of a spring coil in a deployed state according to a first embodiment of the present utility model;

FIG. 8 schematically illustrates a second view of the spring coil in a deployed state in accordance with the first embodiment of the present utility model;

FIG. 9 schematically illustrates a schematic operation of an electro-coagulation embolic coil system in accordance with a first embodiment of the present utility model;

FIG. 10 schematically illustrates a first structural view of the disengaging zone in a first embodiment according to the present utility model;

FIG. 11 schematically illustrates a second structural view of the disengaging zone in accordance with the first embodiment of the present utility model;

FIG. 12 schematically illustrates a third structural view of the disengaging zone in accordance with the first embodiment of the present utility model;

FIG. 13 schematically illustrates a schematic construction of an electro-coagulation embolic coil system in accordance with a second embodiment of the present utility model;

fig. 14 schematically shows a cross-sectional view of a protective member according to a second embodiment of the present utility model;

fig. 15 schematically shows a structural diagram of a wire structure in a second embodiment according to the present utility model;

FIG. 16 schematically illustrates a first structural view of a disengaging zone in a second embodiment according to the present utility model;

FIG. 17 schematically illustrates a second structural view of a disengaging zone in a second embodiment according to the present utility model;

fig. 18 schematically shows a third structural view of the disengaging zone in the second embodiment according to the present utility model.

Reference numerals illustrate:

10 is an electric coagulation embolic coil system, 20 is an aneurysm, 30 is a thrombus, 40 is a power supply, and 50 is a microcatheter;

1 is a conveying rod, 11 is a conveying pipe, 12 is a heat shrinkage pipe, 13 is a developing spring, and 14 is a power supply connecting pipe;

2 is a wire structure, 21 is a spring core wire, 22 is a first insulated wire, 23 is a second connection core wire, 24 is a first connection core wire, and 25 is a second insulated wire;

3 is a protecting piece, 31 is a first part, 311 is a containing channel, 32 is a second part, 321 is a plugging channel;

4 is a spring ring, 41 is a spherical cap part, 411 is a spherical cap, 412 is a cylindrical part, 42 is a spring part, 43 is a connecting part, and 44 is an anti-unwinding wire;

5 is a first disc structure, and 6 is a second disc structure;

arrows in the figure indicate the flow of current.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the present application, a range expressed by "one value to another value" is a general expression which avoids the specification from listing all the values in the range. Thus, recitation of a particular numerical range includes any numerical value within that range, as well as the smaller numerical range bounded by any numerical value within that range, as if the any numerical value and the smaller numerical range were written in the specification in the clear.

In this application, the end that is closer to the operator when used is referred to as the "proximal end", the end that is farther from the operator is referred to as the "distal end", and the "proximal end" and "distal end" of any component of the electro-coagulation embolic coil system are defined in accordance with this principle. "axial" generally refers to the longitudinal direction of the electro-embolic coil system when delivered, and "radial" generally refers to the direction of the electro-embolic coil system perpendicular to its "axial" direction, and defines the "axial" and "radial" directions of any of the components of the electro-embolic coil system in accordance with this principle.

Referring to fig. 1-2, the present utility model provides an electric coagulation embolic coil system 10, comprising a coil 4 and a conveyor, the conveyor comprising a lead structure 2, the coil 4 being fixedly connected to a distal end of the lead structure 2 for powering the coil 4 through the lead structure 2, so as to form a thrombus around the coil 4, and realizing immediate embolism through electric coagulation, thereby reducing the use of the coil 4, shortening the operation time, and reducing the operation cost.

The conveyor also comprises a conveying rod 1 and a protecting piece 3, and the wire structure 2 penetrates through the conveying rod 1 and is fixedly connected with the proximal end of the conveying rod 1. The wire structure 2 comprises a spring core wire 21 and a first insulating wire 22 connected with the spring core wire 21, the protecting piece 3 is arranged at the far end of the conveying rod 1, the protecting piece 3 is provided with a containing channel 311 for isolating the spring core wire 21 from blood flow and a blocking channel 321 communicated with the containing channel 311, the spring core wire 21 is contained in the containing channel 311, the blocking channel 321 is penetrated by the first insulating wire 22 and is closed by the first insulating wire 22, and under the action of external force, the first insulating wire 22 can extend out of the blocking channel 321 and drive the spring core wire 21 to extend out of the blocking channel 321.

With continued reference to fig. 3 and 5, the surface of the spring core wire 21 is free of insulating material, so that electrochemical corrosion occurs to break the contact with blood in the energized state, and the first insulated wire 22 is made of insulating material wrapped around the outer surface of the core wire, so that electrochemical corrosion does not occur to break the contact with blood even if the first insulated wire 22 is in the energized state.

The insulating material is preferably a polymer material such as PI (polyimide), PET (polyethylene terephthalate), PTFE (polytetrafluoroethylene), etc., the core wire is a metal material such as stainless steel, nickel titanium, etc., and the wire diameter is 0.04-0.1mm for transmitting current.

Example 1

A channel is provided in the conveying rod 1 for the wire structure 2 to pass through the conveying rod 1, and the spring core wire 21 is directly or indirectly electrically connected with the spring ring 4. The protecting piece 3 is positioned outside the conveying rod 1, and one end of the protecting piece 3, which is away from the conveying rod 1, is fixedly connected with the spring ring 4.

Referring to fig. 3, fig. 4 and fig. 10, one end of the protecting member 3 facing away from the conveying rod 1 is fixedly connected with the spring ring 4, the protecting member 3 includes a first portion 31 and a second portion 32 connected with the first portion 31, the first portion 31 is located at a distal end of the second portion 32, the first portion 31 is of a hollow structure, the accommodating channel 311 is formed in the hollow structure, the blocking channel 321 is disposed in the second portion 32, an outer side surface of the first insulating wire 22 abuts against an inner wall surface of the blocking channel 321 to be used for sealing the blocking channel 321, the spring ring 4 is fixedly connected with the distal end of the protecting member 3 and blocks the accommodating channel 311, preferably in a welding manner, so that the accommodating channel 311 forms a closed space, blood is prevented from entering the accommodating channel 311, and damage to the spring core wire 21 due to electrochemical corrosion is avoided.

Meanwhile, as shown in fig. 10, 11 and 12, the proximal end of the spring core wire 21 is abutted against the protecting member 3 and is connected with the distal end of the first insulating wire 21, the distal end is abutted against the spring ring 4, the first insulating wire 21 is fixedly connected with the distal end of the conveying rod 1, when the conveying rod 1 is pulled proximally, the spring ring 4 and the protecting member 3 cannot move due to being fixed at a thrombus, the first insulating wire 22 stretches the spring core wire 21 and enables the spring core wire 21 to extend out of the plugging channel 321 to contact with blood, and then the spring core wire 21 is disconnected under the action of electrochemical corrosion, so that the separation of the conveyor and the spring ring is realized.

Referring to fig. 3, the axial length of the first portion 31 is not greater than the axial length of the spring wire 21 in the extended state, i.e., the spring coil 4 presses the spring wire 21 into the receiving channel 311, and the spring wire 21 is in the compressed state.

The material of the protecting member 3 is preferably a metal material with good biocompatibility such as platinum tungsten, platinum iridium, nickel titanium, cobalt chromium, stainless steel and the like, so that the developing function can be achieved, and the protecting member 3 can be a nonmetallic material. Referring to fig. 10, when the material of the protection member 3 is a metal material, the current of the spring core wire 21 may flow to the spring coil 4 indirectly through the protection member 3, or may flow to the spring coil 4 directly; when the material of the protection piece 3 is non-metal, the protection piece has no conductive effect, and the current of the spring core wire 21 directly flows to the spring ring 4; the outer diameter of the protector 3 is 0.25-0.36mm, the diameter of the receiving channel 311 is 0.1-0.25mm, and the diameter of the blocking channel 321 is 0.05-0.1mm.

As shown in fig. 2 and 5, the transfer rod 1 includes a transfer tube 11 and a power connection tube 14 provided at a proximal end of the transfer tube 11. The proximal end of the wire structure 2 is a second connection core wire 23, the second connection core wire 23 is connected with the power connection pipe 14 of the conveying rod 1, the wire structure 2 is fixed with the proximal end of the conveying rod 1 through the second connection core wire 23, the power connection pipe 14 is arranged at the proximal end of the conveying pipe 11, the power connection pipe 14 is electrically connected with the second connection core wire 23 and is used for supplying power to the second connection core wire 23, the power connection pipe 14 is connected with the conveying pipe 11 through a connection seat, and the connection seat insulates the power connection pipe 14 from the conveying pipe 11, so that interference influence of current is avoided.

The first insulated wire 22 penetrates through the conveying pipe 11 and is connected with the second connecting core wire 23, the second connecting core wire 23 is positioned in the power connecting pipe 14 and is connected with the power connecting pipe 14, therefore, the spring core wire 21 is indirectly connected with the second connecting core wire 23 through the first insulated wire 22, the power connecting pipe 14, the second connecting core wire 23, the first insulated wire 22, the spring core wire 21 and the spring coil 4 sequentially form an anode path, then blood contacted with the spring coil 4 transmits current to the conveying pipe 11, the conveying pipe 11 forms a cathode path, and finally the circuit flows back through the conveying pipe 11 and forms a complete current loop.

Obviously, referring to fig. 9, the spring core wire 21 provides positive charges to the spring coil 4, so that the spring coil 4 attracts negatively charged blood for electrophoresis, and a stable thrombus 30 can be quickly formed around the spring coil 4, thereby realizing the embolic treatment of the aneurysm 20.

Referring to fig. 2 and fig. 3, in some embodiments of the present utility model, the conveying rod 1 further includes a heat shrinkage tube 12, where the heat shrinkage tube 12 is sleeved on the outer side surface of the conveying tube 11, and the surface of the heat shrinkage tube 12 is smooth and has insulation performance, so as to reduce friction between the conveying rod 11 and the micro-catheter 50, and isolate the conveying tube 11 from blood of a human body, and reduce loss of electric quantity in the power-on process; it should be noted that the heat shrink tubing 12 does not completely encapsulate the delivery tube 11, and the distal end portion of the delivery tube 11 is exposed and in contact with the blood for communication with the blood.

With continued reference to fig. 3, the conveying rod 1 further includes a developing spring 13 embedded at the distal end of the conveying pipe 11, where the developing spring 13 is sleeved on the outer side surface of the first insulating wire 22, and the developing spring 13 is fixedly connected with the first insulating wire 22 and the distal end inner cavity of the conveying pipe 11, so that the developing spring 13, the first insulating wire 22 and the conveying pipe 11 form an integral structure, and when the conveying pipe 11 is pulled proximally, the first insulating wire 22 and the conveying pipe 11 can move axially relatively still, so that the spring core wire 21 can extend out of the plugging channel conveniently.

Referring to fig. 6, specifically, the spring ring 4 is connected to the distal end of the wire structure 2, and the spring ring 4 seals an end of the second portion 32 away from the first portion 31, the spring ring 4 includes a spherical cap portion 41, a spring portion 42, and a connecting portion 43, the connecting portion 43 is disposed at a proximal end of the spring portion 42, the spherical cap portion 41 is disposed at the distal end of the spring portion 43, the connecting portion 43 is fixedly connected to the distal end of the protecting member 3, so as to seal an end of the second portion 32 away from the first portion 31, and a material of the spring portion 42 is preferably a metal material such as platinum-tungsten alloy, nickel-titanium alloy, stainless steel, or the like.

Further, the spring coil 4 further includes an anti-unwinding wire 44, the material of the anti-unwinding wire 44 is preferably a polymer material with better biocompatibility such as PP, PET, PTFE, PA, the spring portion 42 includes a plurality of coils of springs, the plurality of coils of springs are sequentially connected, one end of the anti-unwinding wire 44 is connected with the spherical cap portion 41, the other end is connected with the connecting portion 43, and the anti-unwinding wire 44 sequentially penetrates through the plurality of coils of springs to ensure that the spring coil 4 does not unwind.

With continued reference to fig. 6, the spherical cap 41 includes a spherical cap 411 and a cylindrical portion 4312, the spherical cap 411 is connected with the cylindrical portion 412, the cylindrical portion 412 is embedded in the distal end of the spring portion 432, the cylindrical portion 412 is embedded with at least 2 rings of springs, the diameter of the spherical cap 411 is equal to the diameter of the spring portion 42, the diameter is 0.25-0.36m, and the cylindrical portion 412 is embedded into the spring portion 42 to form a fixed relationship, so that the spherical cap 41 and the spring portion 42 are in smooth transition, thereby avoiding sharp structure formation and further avoiding damage to blood vessels of a human body caused by the existing sharp structure.

As shown in fig. 7 and 8, when the spring ring 4 is in the released state, the spring portion 42 is radially expanded, the spherical cap portion 41 and a part of the spring portion 42 form a first disc structure 5, the connecting portion 43 and a part of the spring portion 42 form a second disc structure 6, and the diameter of the first disc structure 5 is smaller than that of the second disc structure 6, so that when the spring ring 4 is released at the neck opening of the aneurysm 20, the second disc structure 6 expands and seals the neck opening of the aneurysm 20, no matter the wide carotid aneurysm or the narrow carotid aneurysm, only one spring ring 4 needs to be implanted to be released at the neck opening of the aneurysm 20, the situation that a plurality of spring rings 4 are needed is avoided, the effects of reducing operation time and operation cost can be achieved, and the diameter D of the second disc structure 6 is larger than the diameter 1-2mm of the neck opening of the aneurysm 20, so that the second disc structure 6 completely covers the neck opening of the aneurysm 20.

Preferably, the diameter D of the first disc structure 5 is 50-75% of the diameter D of the second disc structure 6, and the first disc structure 5 is released first during the release process, so that the size of the first disc structure 5 is reduced, which is beneficial to avoiding puncturing the aneurysm wall.

The working principle of the conveyor is as follows:

(1) Referring to fig. 9, the delivery device is delivered to the lesion site and the coil 4 is inflated and deployed to completely cover the neck of the aneurysm 20, keeping the delivery device stationary;

(2) Referring to fig. 10, the power connection tube 14 is then connected to the positive electrode of the power supply 40, the power supply voltage is 6-12V, the current is 0.5-5mA, the current is sequentially transmitted to the spring coil 4 through the power connection tube 14, the second connection core wire 23, the first insulated wire 22 and the spring core wire 21, then the blood in contact with the spring coil 4 transmits the current to the transmission tube 11, and finally the current returns to the negative electrode of the power supply 40 to form a complete current loop;

(3) The spring ring 4 is connected to the positive electrode of the power supply 40, adsorbs substances with negative charges in blood to gather, induces the thrombus 30 to form, and after a period of time, the aneurysm cavity is observed to be free of contrast agent gathering through DSA contrast, at the moment, the thrombus 30 completely covers the neck of the aneurysm 20, so that the purpose of treating the aneurysm 20 is achieved;

(4) Referring to fig. 11, after the electrocoagulation is finished, the delivery rod 1 is retracted proximally, the protector 3 and the spring coil 4 are positioned and fixed at the neck of the aneurysm, and when the first insulated wire 22 moves proximally and pulls the spring core wire 21 to extend out of the plugging channel 321, it is noted that at this time, the current loop is changed, the proximal end of the spring core wire 21 is in contact with the thrombus 30, and the current is transferred to the thrombus 30 in contact with the current loop, and then the current is returned from the delivery tube 11 to the negative electrode of the power supply 40 through the conduction of blood;

(5) Referring to fig. 12, under the action of current, the exposed spring core wire 21 is disconnected by electrochemical corrosion with blood, at this time, the spring core wire 21 of the wire structure 2 is disconnected with the first insulated wire 22, the first insulated wire 22 is disconnected from the protecting member 3, so as to complete the disconnection of the delivery tube 11 from the spring ring 4, the operation is completed, and the delivery rod 1 and the microcatheter 50 are withdrawn proximally.

Example 2

In embodiment 2, the same reference numerals are given to the same structures as those in embodiment 1, and the same description is omitted, and embodiment 2 is modified on the basis of embodiment 1: the mounting position of the protector 3, the structure of the protector 3 and the structure of the wire structure 2.

Referring to fig. 13, 14 and 16, the protector 3 includes a first portion 31 and a second portion 32, the first portion 31 is disposed in the second portion 32, the first portion 31 is a hollow structure, the accommodating channel 311 is formed in a part of the hollow structure, the blocking channel 321 is disposed in the second portion 32, the first portion 31 and the second portion 32 are both tubular structures, and the outer periphery of the second portion 32 is attached to the inner wall of the conveying rod 1.

The second portion 32 is made of an insulating material to avoid the spring core wire 21 from being in contact with the delivery tube 11 to cause a short circuit, because the spring core wire 21 is a part of the positive path and the delivery tube 11 is a part of the negative path, and if the two paths are connected, a short circuit is caused. The axial length of the second portion is greater than the length of the spring core wire 21 to avoid contact of the spring core wire 21 with the inner wall of the delivery tube 11.

The first portion 31 may be made of a metal material, such as platinum-tungsten, platinum-iridium, nickel-titanium, cobalt-chromium, stainless steel, and the like, which has a good biocompatibility, and can perform a developing function, so as to facilitate observation of the distal end of the delivery tube 11.

Referring to fig. 15 and 16, the wire structure 2 further includes a first connection core wire 24 and a second insulation wire 25, the wire structure 2 is fixed to the proximal end of the delivery rod 1 by the second connection core wire 23, the spring core wire 21 is disposed at the proximal end of the first insulation wire 22, the second insulation wire 25 is disposed at the proximal end of the spring core wire 21, the second connection core wire 23 is disposed at the proximal end of the second insulation wire 25, the first connection core wire 24 is disposed at the distal end of the first insulation wire 22, and the first connection core wire 24 is connected to the connection portion 33 of the spring coil 4; the distal end of the first connection core wire 24 is provided with a hook, the connecting portion 43 is provided with a hook hole, the first connection core wire 24 and the connecting portion 43 are hooked, and the first connection core wire 24 is adhered to the connecting portion 43 through biological glue and forms an integrated structure so as to be used for avoiding the first connection core wire 24 from being damaged due to electrochemical corrosion.

Thus, with continued reference to fig. 13, the power connection tube 14, the second connection core wire 23, the second insulated wire 25, the spring core wire 21, the first insulated wire 22, the first connection core wire 24, and the spring coil 4 sequentially form a positive path, and then blood in contact with the spring coil 4 transmits current to the delivery tube 11, the delivery tube 11 forms a negative path, and finally the circuit flows back through the delivery tube 11 and forms a complete current loop.

The working principle of the conveyor is as follows:

(1) The transporter is transported to the lesion position, and the spring ring 4 is expanded and unfolded to completely cover the neck opening of the aneurysm 20, and the transporter is kept fixed;

(2) Then the power connection pipe 14 is connected with the positive electrode of the power supply 40, the power supply voltage is 6-12V, the current is 0.5-5mA, the current sequentially passes through the power connection pipe 14, the second connection core wire 23, the second insulation wire 25, the spring core wire 21, the first insulation wire 22 and the first connection core wire 24 to be directly transmitted to the spring ring 4, then the blood contacted with the spring ring 4 transmits the current to the conveying pipe 11, and finally the current returns to the negative electrode of the power supply 40 to form a complete current loop;

(3) The spring ring 4 is connected to the positive electrode of the power supply 40, adsorbs substances with negative charges in blood to gather, induces the thrombus 30 to form, and after a period of time, the aneurysm cavity is observed to be free of contrast agent gathering through DSA contrast, at the moment, the thrombus 30 completely covers the neck of the aneurysm 20, so that the purpose of treating the aneurysm 20 is achieved;

(4) Referring to fig. 17, after the electrocoagulation is finished, the delivery rod 1 is retracted proximally, the spring ring 4 is positioned at the neck of the aneurysm 20 and fixed, and as the distal end of the spring core wire 21 abuts against the protecting member 3, the first insulated wire 22 moves distally and pulls the spring core wire 21 to extend out of the plugging channel 121, it is to be noted that at this time, the current loop is changed, the first connecting core wire 24 contacts with the thrombus 30 and transmits the current to the thrombus 30 contacted with the current, and then the current returns from the delivery tube 11 to the negative electrode of the power supply through the conduction of blood;

(5) Referring to fig. 18, under the action of current, the exposed spring core wire 21 is disconnected from blood by electrochemical corrosion, at this time, the spring core wire 21 of the wire structure 2 is disconnected from the first insulated wire 22, the spring core wire 21 is disconnected from the spring coil 4, so as to complete the disconnection of the delivery tube 11 from the spring coil 4, the operation is completed, and the delivery rod 1 and the microcatheter 50 are withdrawn.

The delivery device further comprises an introducer sheath and microcatheter 50 for delivering: (1) First, the spring ring 4 is connected with the delivery rod 1, and the whole body is loaded in an introducing sheath (not shown in the figure), the spring ring 4 is in a compressed state, and part of the delivery rod 1 extends out of the proximal end of the introducing sheath; (2) Delivering microcatheter 50 to the site of the lesion (e.g., at an aneurysm); (3) Connecting an introducer sheath to the proximal end of the microcatheter 50, then pushing the delivery rod 1 distally, pushing the coil 4 from the introducer sheath into the microcatheter 50; (4) Continuing to push the conveying rod 1 distally, after reaching the target position, releasing the spring ring 4 from the micro-catheter 50, expanding, and sealing the neck of the aneurysm 20; (5) proximally withdrawing microcatheter 50 and delivering rod 1.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. An electro-coagulation embolic coil system, comprising:

a conveying rod;

the wire structure penetrates through the conveying rod and is fixedly connected with the proximal end of the conveying rod, and the wire structure comprises a spring core wire and a first insulating wire connected with the spring core wire;

the spring ring is fixedly connected with the distal end of the wire structure;

the protection piece set up in the distal end of conveyer rod, the protection piece be provided with be used for making the isolated blood flow of spring core silk hold the passageway and with hold the shutoff passageway of passageway intercommunication, the spring core silk accept in hold the passageway, first insulated wire wears to establish shutoff passageway and closure shutoff passageway, under the exogenic action, first insulated wire can stretch out shutoff passageway and drive the spring core silk stretches out shutoff passageway.

2. The electro-coagulation embolic coil system of claim 1, wherein the protector comprises a first portion and a second portion connected to the first portion, the first portion being a hollow structure, the receiving channel being formed in the hollow structure, the occluding channel being disposed in the second portion.

3. The electro-coagulation embolic coil system of claim 2, wherein the protector is located outside the delivery rod, and wherein the proximal end of the spring core wire is connected to the distal end of the first insulated wire, which is fixedly connected to the distal end of the delivery rod.

4. The electro-coagulation embolic coil system of claim 3, wherein the axial length of the first portion is no greater than the axial length of the spring core wire.

5. The electro-coagulation embolic coil system of claim 3, wherein the wire structure further comprises a second connecting core wire, a distal end of the second connecting core wire being connected to a proximal end of the first insulated wire, the wire structure being secured to a proximal end of the delivery rod by the second connecting core wire.

6. The electro-coagulation embolic coil system of claim 2, wherein the coil comprises a spherical cap portion, a spring portion, and a connecting portion, the connecting portion being disposed at a proximal end of the spring portion, the spherical cap portion being disposed at a distal end of the spring portion, the connecting portion sealing off an end of the second portion distal from the first portion.

7. The electro-coagulation embolic coil system of claim 2, wherein the protector is fixedly disposed within the delivery rod, the second portion is tubular in configuration, the outer periphery of the second portion conforms to the inner wall of the delivery rod, the first portion is disposed within the second portion, and the distal end of the spring core wire is connected to the proximal end of the first insulated wire.

8. The electro-coagulation embolic coil system of claim 7, wherein the wire structure further comprises a second insulated wire and a second connecting core wire, a distal end of the second insulated wire being connected to a proximal end of the spring core wire, a proximal end of the second insulated wire being connected to a distal end of the second connecting core wire, the wire structure being secured to a proximal end of the delivery rod by the second connecting core wire.

9. The electro-coagulation embolic coil system of claim 7, wherein the wire structure further comprises a first connecting core wire, a proximal end of the first connecting core wire being connected to a distal end of the first insulated wire, the distal end of the first connecting core wire being fixedly connected to the coil.

10. The electro-coagulation embolic coil system of claim 6, wherein when the coil is in a released state, the spherical cap portion and a portion of the spring portion form a first disc structure, and the connecting portion and a portion of the spring portion form a second disc structure, the first disc structure having a diameter that is smaller than a diameter of the second disc structure.