CN116327330A - Wire carrying terminal and subcutaneous implantation tool - Google Patents

Abstract

The invention relates to a wire carrying terminal and a subcutaneous implantation tool, wherein the subcutaneous implantation tool comprises a handle, a tunnel making terminal, a wire carrying terminal and a tunnel making rod, one end of the tunnel making rod is connected with the handle, the other end of the tunnel making rod is selectively and detachably connected with the tunnel making terminal or the wire carrying terminal, the wire carrying terminal is used for clamping an extension wire, one end of the extension wire is provided with a connector, the side surface of the wire carrying terminal is provided with a groove structure, and the groove structure is used for embedding the connector with at least part of the length; one side of the groove structure extending axially penetrates through the first end part of the wire carrying terminal, and the other side of the groove structure extending axially is in a blocking state with the second end part of the wire carrying terminal. So dispose, when reducing the diameter of carrying line terminal and extension wire connector junction, sealing connection head that can be better, can also reduce the damage to the connector, improve the life of connector.

Description

Wire carrying terminal and subcutaneous implantation tool

Technical Field

The invention relates to the technical field of medical equipment, in particular to a wire carrying terminal and a subcutaneous implantation tool.

Background

Parkinson's Disease (PD) is a common neurodegenerative Disease, and is common to the elderly, with average onset age of about 60 years. The most important pathological changes in parkinson's disease are the degeneration and death of mesogen substantia nigra Dopamine (DA) neurons, which lead to significant reduction of striatal DA content and pathogenesis. Parkinson's disease mainly presents with resting tremors, bradykinesia, postural gait disturbances, etc., and can have a great impact on the life of the patient.

With the development of modern medical technology, the use of electrodes to stimulate subthalamic nucleus or globus pallidus medial nucleus can effectively improve the symptoms of parkinson. The deep brain nerve stimulating electrode (Deep Brain Stimulation: DBS for short) system used is shown in fig. 1 and comprises a pulse generator (generally abbreviated as IPG) 1, an extension lead 2 and an electrode 3. The electrode 3 is generally implanted in the brain at about 10cm, the rest is buried under the skin of the head, the other end is placed at the position behind the ear and is connected with a subcutaneous extension lead 2, and the extension lead 2 is connected with the pulse generator 1. The pulse generator 1 generates an electrical signal which is transmitted via the subcutaneous extension lead 2 to the electrode 3 and thus to the brain target area. If the patient has symptoms such as resting tremor and gait disorder on one side of the patient's body (only left or right side of the body), it is generally necessary to implant 1 pulse generator 1, 1 extension lead 2 and 1 electrode 3, as shown in fig. 1. If the patient's symptoms appear bilateral, it is often necessary to implant 1 pulse generator 1, 2 extension leads 2, and 2 electrodes 3.

Currently, when the extension lead 2 is implanted subcutaneously, the extension lead 2 is connected to the carrier wire terminal of the tunneling tool, which pulls the extension lead 2 through two incisions in the skin under the guidance of the penetration rod. The conventional manners of connecting the carrier terminal with the extension wire 2 mainly include: one is to insert the connector of the extension wire into the inner hole of the carrier wire terminal, the overall diameter of the carrier wire terminal is increased, the resistance of the lead is increased, the difficulty of the lead is increased, and the connector is particularly easy to damage; the other is that the connecting rod of the wire carrying terminal is inserted into the connector of the extension wire and then is radially screwed and fixed by the screw, so that the screw is required to be disassembled and assembled for multiple times, the connector of the extension wire is extremely easy to damage, and the waterproof sealing effect cannot be achieved. In addition, there are problems that the wire carrying terminal cannot simultaneously carry a plurality of extension wires, and the wire carrying terminal and the extension wire connector are easy to scratch blood vessels.

Disclosure of Invention

The invention aims to provide a wire carrying terminal and a subcutaneous implantation tool, which can be used for sealing a connector better while reducing the diameter of the joint of the wire carrying terminal and an extension wire connector, reducing the damage to the connector and prolonging the service life of the connector.

In order to achieve the above purpose, the invention provides a wire carrying terminal for clamping an extension wire, wherein one end of the extension wire is provided with a connector, and the side surface of the wire carrying terminal is provided with a groove structure; the groove structure is used for embedding the connector with at least part of the length; one side of the groove structure extending axially penetrates through the first end part of the wire carrying terminal, and the other side of the groove structure extending axially is in a blocking state with the second end part of the wire carrying terminal.

Optionally, the groove structure comprises a plurality of grooves which are sequentially communicated along the axial direction, and the cross section sizes of the plurality of grooves are different from each other; wherein the most proximal one of the grooves is in a blocking state with the second end portion, and the most distal one of the grooves penetrates through the first end portion.

Optionally, the cross-sectional dimensions of the plurality of grooves decrease sequentially from the second end to the first end of the wire-carrying terminal.

Optionally, the groove structure comprises two grooves; one of the grooves at the nearest end is used for clamping the whole large-diameter section on the connecting head; one of the grooves at the most distal end is used for clamping a small-diameter section of a part of the length on the connector.

Optionally, the groove structure comprises three grooves; one of the grooves at the nearest end is used for clamping the whole large-diameter section on the connecting head; the middle groove is used for clamping the whole small-diameter section on the connecting head; one of the grooves at the most distal end is used for clamping part of the wire body of the extension wire.

Optionally, at least a portion of the groove has a radial depth greater than or equal to the maximum outer diameter of the section of the connector that mates with the groove.

Optionally, the number of the groove structures is a plurality, and all the groove structures are arranged at intervals in the circumferential direction of the wire carrying terminal and staggered in the axial direction of the wire carrying terminal; each groove structure is used for clamping one extension wire.

Optionally, the groove wall of the groove structure near the second end portion has a guiding inclined plane, and the guiding inclined plane is used for guiding the connector to be inserted into the groove structure.

Optionally, the carrier terminal has a smooth outer surface.

To achieve the above object, the present invention also provides a subcutaneous implantation tool for establishing a subcutaneous tunnel to implant an extension lead into a predetermined object through the subcutaneous tunnel, comprising:

a tunneling terminal;

and any one of the wire-carrying terminals; the method comprises the steps of,

and one end of the tunneling rod is selectively detachably connected with the tunneling terminal or the line carrying terminal.

Optionally, the subcutaneous implantation tool further comprises:

the other end of the tunneling rod is connected with the handle.

Optionally, the subcutaneous implantation tool further comprises:

a tunnel-creating tube removably sleeved over the tunnel-creating rod, and configured to be restrained from movement in an axial direction relative to the tunnel-creating rod.

The invention uses the groove structure on the side surface of the carrier terminal to embed and fix the connector of the extension lead, so that the carrier terminal drives the extension lead to pass through the incision on the skin and be implanted under the skin. So the configuration makes the whole diameter after carrying line terminal and the connector cooperation can not be too big, can reduce the lead wire resistance, reduces the lead wire degree of difficulty, has avoided inserting the inside of carrying line terminal with whole connector moreover, has also avoided inserting the inside of connector with carrying line terminal, and need not screw up fixedly through the screw is radial, consequently can prevent effectively that carrying line in-process from to the damage of extension wire connector, improves the life of connector, and the cell wall of groove structure can shutoff terminal surface jack and the radial screw hole of connector simultaneously, and waterproof sealing is effectual, can further reduce the damage of connector.

The invention can clamp and fix the sections with different outer diameters on the connector by utilizing the grooves in the groove structure, thus the risk of falling off of the extension wire can be effectively reduced, and the clamping firmness of the extension wire is ensured.

According to the invention, the radial depth of at least part of the groove is set to be greater than or equal to the maximum outer diameter of the section where the connector is matched with the groove, so that the connector can be prevented from protruding out of the wire carrying terminal, the problem that the connector scratches a subcutaneous capillary vessel in the wire leading process is prevented, the damage to a patient is reduced, and the uncomfortable feeling of the patient body is reduced.

According to the invention, the number of the groove structures is multiple, and each groove structure can be used for clamping one extension lead, so that the aim of implanting at least two extension leads into the skin is fulfilled, the application range of a subcutaneous implantation tool is enlarged, and the subcutaneous implantation tool is more convenient to use. In particular, all the groove structures are staggered in the axial direction of the wire carrying terminal, so that the problem that the overall diameter is overlarge due to the fact that connectors on a plurality of extension wires are arranged in parallel can be solved, the overall diameter of the wire carrying terminal can be effectively reduced, the damage to a patient is reduced, and the wire guiding difficulty is reduced.

The invention uses the guiding inclined plane of the groove wall of the groove structure to guide the insertion of the connector, thereby further reducing the difficulty of clamping the connector and reducing the damage to the connector. In addition, the invention further prevents the problem that the carrier terminal scratches the subcutaneous capillary vessel in the process of lead wire by arranging the carrier terminal to have a smooth outer surface, thereby reducing the damage to patients.

Drawings

Those of ordinary skill in the art will appreciate that the figures are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention. In the accompanying drawings:

FIG. 1 is a schematic diagram of an application scenario of a DBS stimulation system;

FIG. 2a is a schematic diagram of a tunneling rod and tunneling terminal connection according to a preferred embodiment of the present invention;

FIG. 2b is a schematic cross-sectional view of a threaded connection of a tunneling rod and a tunneling terminal according to a preferred embodiment of the present invention;

FIG. 3 is a schematic diagram of the connection of the tunneling rod and the carrier terminal according to a preferred embodiment of the present invention;

FIG. 4 is a schematic view of a carrier terminal having a recessed structure in accordance with a preferred embodiment of the present invention;

FIGS. 5 a-5 b are schematic views of a carrier terminal having two groove structures according to a preferred embodiment of the present invention;

FIG. 5c is a schematic cross-sectional view of a carrier wire terminal having two groove structures in accordance with a preferred embodiment of the present invention;

FIG. 6a is a schematic view of an extension wire of a preferred embodiment of the present invention;

FIG. 6b is a schematic view of a connector according to a preferred embodiment of the present invention;

FIG. 7 is a schematic view of tunneling a subcutaneous implant tool in accordance with a preferred embodiment of the invention;

FIG. 8 is a schematic diagram of the assembly of the carrier terminals and the extension wires according to the preferred embodiment of the present invention;

FIG. 9 is a schematic view of an extended wire lead path in accordance with a preferred embodiment of the present invention;

fig. 10 is a schematic diagram of the pulser, extension leads and electrode connections of a preferred embodiment of the present invention.

Reference numerals are described as follows:

1-a pulse generator; 10-a handle; 11-tunneling rod; 2-extending wires; 21-one end of an extension wire; 22-a connector extending the other end of the wire; 201-end face electrode insertion holes; 202-fastener operation holes; 221-large diameter section; 222-small diameter section; 23-a wire body; 3-electrodes; 4-skin first incision; 5-a skin second incision; 30-tunneling tube; 40-tunneling terminals; 50-wire carrying terminals; 510-a groove structure; 511-one side of the groove structure extending axially; 512-the other side of the groove structure extending axially; 51-a first groove; 52-a second groove; 53-a third groove; a first end of the wire carrying terminal; and a second end of the b-carrier wire terminal.

Detailed Description

In order to make the contents of the present invention more clear and understandable, the present invention is further described below with reference to the drawings attached to the specification. Of course, the invention is not limited to this particular embodiment, and common alternatives known to those skilled in the art are also encompassed within the scope of the invention. The following embodiments and features of the embodiments may be complemented or combined with each other without conflict.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in this application, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be understood that the terms "a" and "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one of; "plurality" means two and more than two. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. Next, the present invention will be described in detail with reference to the drawings, which are only for the purpose of detailing examples of the present invention, and should not be construed as limiting the present invention. In the description of the present invention, "outer diameter" is not intended to refer specifically to the case where the cross-section is circular, and if the cross-section is non-circular, the outer diameter and the maximum width in cross-section. In the description of the present invention, "cross section" refers to a section perpendicular to an axis. In the description of the present invention, the "proximal end" is the end that is proximal to the operator of the subcutaneous implantation tool: "distal" is the end opposite the "proximal" end, i.e., the end remote from the operator of the subcutaneous implantation tool. In the description of the present invention, "radial" refers to a direction perpendicular to an axis; "circumferential" refers to a direction about an axis.

A subcutaneous implantation tool is disclosed for establishing a subcutaneous tunnel for implantation of an extension lead into a patient (predetermined subject) through the subcutaneous tunnel. The extension lead disclosed by the invention is mainly a lead on an implantable nerve electrical stimulation system, and the implantable nerve electrical stimulation system releases electrical stimulation by implanting electrodes at specific nerves such as motor nerves and sensory nerves in a human body so as to stimulate the specific nerves, thereby restoring the functions of the human body to a normal operation state. The electric pulse signal generated by the implanted nerve electric stimulator is transmitted to the electrode through the extension lead.

The implantable nerve electrical stimulation system mainly comprises implantable Deep Brain Stimulation (DBS), implantable cortex stimulation (CNS), implantable spinal cord electrical stimulation system (SCS), implantable sacral nerve electrical stimulation system (SNS), implantable vagal nerve electrical stimulation system (VNS) and the like. Known implantable neurostimulation systems generally primarily include a pulse generator, electrodes, extension leads, and a control device. The pulse generator is connected with an extension lead which is in turn connected to the electrode, so that the pulse generated by the pulse generator is transmitted to the electrode to electrically stimulate the nerve.

The invention discloses a subcutaneous implantation tool which specifically comprises a tunneling terminal, a wire carrying terminal and a tunneling rod; one end of the tunneling rod is selectively and detachably connected with the tunneling terminal or the wire carrying terminal; wherein the tunneling terminal is used for puncturing the skin, and puncturing the skin through the first incision and the second incision to establish a subcutaneous tunnel; after the subcutaneous tunnel is established, the tunneling making terminal is detached from the tunneling making rod, the carrier terminal is arranged at the other end of the tunneling making rod, and then the carrier terminal is clamped with the connector of the extension lead, and then the tunneling making rod is pulled to drive the extension lead to move out along the skin second incision to the skin first incision; finally, the wire carrying terminal is separated from the connector of the extension wire, and then the connector is connected with the connector of the electrode, so that the connection process of the extension wire and the electrode can be completed.

In order to solve one or more technical problems of the existing tunneling tool, the carrier terminal disclosed by the invention is embedded with a connector with at least part of the length of one end of an extension wire through a groove structure on the side surface, so that the purposes of clamping and fixing the extension wire are achieved. It should be understood that the groove structure disclosed by the invention is actually in interference fit connection with the connector, so that the effect of embedding (including clamping) the connector into the groove structure is achieved. So the structure need not to insert the inside of carrying line terminal with whole connector, makes the whole diameter after carrying line terminal and the connector cooperation can not be too big, can reduce the lead resistance, reduces the lead wire degree of difficulty, also need not to insert the inside of connector with carrying line terminal moreover, need not to screw up fixedly through the screw is radial, consequently can prevent effectively that carrying line in-process from carrying the damage of line connector to extension wire, improves the life of connector. In particular, the axially extending side of the groove structure and the second end part of the carrier wire terminal are in a blocking state, so that the bottom groove wall and the side groove wall of the groove structure can be used for blocking the end face insertion holes and the radial screw holes of the connector, the effect of sealing the connector is achieved, the waterproof sealing effect is achieved, and the damage of the connector can be further reduced.

The invention is further described below with reference to the drawings and the preferred embodiments, in which the following embodiments and features of the embodiments can be supplemented or combined with each other without conflict. For simplicity, it is assumed in the following description that the implantable neural electrical stimulation is implantable deep brain electrical stimulation, and those skilled in the art should be able to modify the following description, which is used for cases other than implantable deep brain electrical stimulation, with appropriate modifications in detail.

Referring to fig. 2a, 2b and 3, a preferred embodiment of the present invention discloses a subcutaneous implantation tool comprising a handle 10, a tunneling rod 11, a tunneling terminal 40 and a carrier terminal 50; among them, the handle 10 is a preferable structure. In addition, the tunneling rod 11 is preferably a solid rod-like structure to reduce the diameter of the tunneling rod 11 and reduce the resistance during the wire-lead extension process. The tunneling rod 11, the tunneling terminal 40 and the carrier terminal 50 are generally made of metal materials, such as medical stainless steel, and compared with high polymer materials, the components made of the metal materials have enough strength and toughness, so that the connection firmness can be better ensured, and the falling-off can be prevented. And the outer surface of the wire carrying terminal 50 made of the metal material has smoother shape, so that the subcutaneous capillary can be effectively prevented from being scratched in the wire-guiding process.

One end of the tunneling bar 11 is selectively detachably connected to the tunneling terminal 40 or the carrier wire terminal 50. The tunneling bar 11 may be connected to the tunneling terminal 40 or the carrier wire terminal 50 in various ways, and may be selected as desired by those skilled in the art. For example, the tunneling rod 11 may be snapped or screwed with the tunneling terminal 40 or the carrier wire terminal 50. In this example, the tunneling rod 11 is screwed to the tunneling terminal 40 or the carrier wire terminal 50.

The other end of the tunneling rod 11 is preferably connected with a handle 10, and the handle 10 is arranged to facilitate the puncturing process. The tunneling rod 11 and the handle 10 are generally in a split structure, and are preferably fixedly connected in an injection molding mode, so that the connection strength is reliable, and a doctor can conveniently operate in the puncturing process. Thus, the material of the handle 10 is generally plastic, and conventional medical grade plastics may be used in particular.

Preferably, the tunnel-making tube 30 is sleeved outside the tunnel-making rod 11, and the tunnel-making tube 30 is configured to be limited to move in the axial direction relative to the tunnel-making rod 11, so that the tunnel-making tube 30 is prevented from falling off, and the position accuracy of the tunnel-making tube 30 is ensured. The tunnel making tube 30 can be made of medical plastic materials with low friction coefficient, so that the lead resistance of the tunnel making rod 11 in the body can be reduced to the greatest extent, and the pain of a patient is reduced. The material of the tunnel tube 30 is not particularly limited, and may be selected from a polymer material with a low friction coefficient, such as nylon, polytetrafluoroethylene, and ultra-high molecular weight polyethylene.

Referring to fig. 6a and 6b, the preferred embodiment of the present invention further provides an extension wire 2, wherein one end 21 of the extension wire 2 is connected to the pulse generator, and the other end is provided with a connector 22, and the connector 22 is used for detachably connecting with the carrier terminal 50. The connection head 22 generally has an end face electrode insertion hole 201 (i.e., end face insertion hole), the end face electrode insertion hole 201 being for connection with an electrode, and the connection head 22 further has a fastener operation hole 202 (i.e., radial screw hole) on a side face, the fastener operation hole 202 being for connection with a fastener to lock the extension lead 2.

Referring to fig. 4, at least one groove structure 510 is disposed on a side surface of the wire carrying terminal 50, and the groove structure 510 is used for embedding the connector 22 with at least a part of the length, so that the groove structure 510 is connected with the connector 22 in an interference fit manner, thereby achieving the purpose of clamping and fixing the connector 22. One side 511 of the groove structure 510 extending in the axial direction penetrates through the first end a of the carrier wire terminal 50, and the other side 512 of the groove structure 510 extending in the axial direction is blocked (i.e. does not penetrate through) from the second end b of the carrier wire terminal 50. In practical use, after the extension lead 2 is clamped in the groove structure 510, the end face electrode insertion hole 201 and the fastener operation hole 202 on the connector 22 are both attached to the groove wall of the groove structure 510. So set up, can utilize the terminal surface and the side of groove wall sealing connection head 22 of groove structure 510 to play waterproof sealing's effect, utilize the groove structure 510 of the side of year line terminal 50 to clamp connector 22 simultaneously, can reduce the damage to connector 22 in the assembly process, can realize firm fixed through interference fit's embedding mode again moreover, effectively prevent that extension wire 2 from droing.

In some examples, the groove structure 510 is used to embed a part of the length of the connector 22, that is, the axial length of the groove structure 510 is smaller than the axial length of the connector 22, where the length of the wire carrying terminal 50 is smaller, as shown in fig. 4. In other examples, the groove structure 510 is used to embed the connector 22 with the whole length, that is, the axial length of the groove structure 510 is greater than or equal to the axial length of the connector 22, and at this time, the length of the wire carrying terminal 50 is longer, as shown in fig. 5a and 5 b.

Generally, when the number of the extension wires 2 is one, the extension wires 2 may be clamped by the shorter carrier wire terminal 50. As shown in fig. 4, in a specific embodiment, only one groove structure 510 is provided on the side surface of the carrier terminal 50, the one groove structure 510 is used for guiding one extension wire 2, the connector 22 of the extension wire 2 is clamped in the groove structure 510 on the carrier terminal 50, the axial length of the groove structure 510 is smaller than the axial length of the connector 22, and after clamping, the connector 22 is fixed by using interference fit between the groove structure 510 and the connector 22.

The connectors 22 of the extension wires 2 generally have different outer diameters, and in this case, in order to achieve a more secure fixation, the groove structure 510 is configured to include a plurality of grooves sequentially communicated in the axial direction, and cross-sectional dimensions (i.e., cross-sectional areas) of the plurality of grooves are different from each other; the grooves are used for respectively clamping sections with different outer diameters on the connector 22 and are in interference fit connection with the corresponding sections. Wherein the most proximal one of the grooves is blocked from the second end b, and the most distal one of the grooves extends through the first end a. Further, the cross-sectional dimensions of the plurality of grooves decrease in sequence from the second end b to the first end a of the carrier wire terminal 50 to accommodate the sections of the connector head 22 of different outer diameters.

As shown in fig. 6, the connector 22 has a large-diameter section 221 and a small-diameter section 222 connected in sequence in the axial direction, a connection terminal electrically connected with the electrode is provided in the large-diameter section 221, the small-diameter section 222 is connected with the lead body 23 of the extension lead 2, and the small-diameter section 222 can protect the lead body 23 and enhance the connection strength. The small diameter section 222 has an outer diameter smaller than that of the large diameter section 221, and the lead body 23 has an outer diameter smaller than that of the small diameter section 222. Preferably, the connector 22 has a smooth outer surface, such as a smooth curved surface, to ensure that the physician does not fall off when pushing the extension wire 2 within the patient. And the outside of connector 22 is covered with the protective sheath of elastic material such as silica gel generally to utilize the elastic deformation of protective sheath, realize that connector 22 and groove structure 510's interference fit is connected, of course the protective sheath still plays certain waterproof sealing effect.

In one embodiment, the groove structure 510 includes two grooves to fit the large diameter section 221 and the small diameter section 222 of the connector 22. As shown in fig. 4, the two grooves are a first groove 51 and a second groove 52, respectively, the first groove 51 being closer to the second end b of the carrier terminal 50 than the second groove 52; the first groove 51 is used for clamping the whole large-diameter section 221 and is in interference fit connection with the large-diameter section 221, and the second groove 52 is used for clamping the small-diameter section 222 with at least part of the length and is in interference fit connection with the small-diameter section 222. In this example, the second groove 52 is configured to clamp a portion of the small diameter section 222 to reduce the length of the carrier wire terminal 50.

In another embodiment, the groove structure 510 includes three grooves that fit not only the large diameter section 221 and the small diameter section 222 of the connector 22, but also the lead body 23. As shown in fig. 5a, the three grooves are a first groove 51, a second groove 52 and a third groove 53 which are sequentially communicated in the axial direction; unlike the foregoing, the second groove 52 is configured to clamp the small-diameter section 222 of the entire length, and further clamp a portion of the wire body 23 through the third groove 53, and is connected with the wire body 23 in an interference fit.

In order to prevent the connector 22 from scratching the subcutaneous capillary during the wire-guiding process, it is preferable that the radial depth of at least part of the groove is greater than or equal to the maximum outer diameter of the section of the connector 22 mating with the groove, so that at least part of the outer surface of the connector 22 is flush with the side of the wire-carrying terminal 50 or lower than the height of the side of the wire-carrying terminal 50, and this arrangement also prevents the extension wire 2 from being put back, achieving the purpose of "error proofing". It is of course more preferred that the radial depth of all grooves be greater than the maximum outer diameter of the section of the connector 22 that mates with the grooves so that the entire connector 22 does not come into contact with tissue.

In addition, the number of extension leads 2 used may be different depending on the number of electrodes when performing deep brain electrical stimulation. When the number of the extension wires 2 is two or more, the carrier wire terminal 50 needs to be provided as a groove structure 510 in which the plurality of extension wires 2 are routed.

Referring to fig. 5a to 5c, a plurality of groove structures 510 are disposed on the side surface of the wire carrying terminal 50, and each groove structure 510 is used for clamping one extension wire 2.

In order to avoid the problem of the excessive overall diameter caused by the parallel connection of the connectors 22 on the plurality of extension wires 2, it is preferable to stagger the axial positions of all the groove structures 510, i.e. reduce the overall diameter of the wire carrying terminal 50, so as to effectively prevent the subcutaneous capillary from being scratched during the wire-guiding process. Specifically, all the groove structures 510 are arranged at intervals in the circumferential direction of the carrier wire terminal 50 and are staggered in the axial direction of the carrier wire terminal 50, that is, the grooves in all the groove structures 510 are not on the same circumference but are at different axial positions, and at this time, the axial length of the carrier wire terminal 50 will be increased to some extent. Of course, the number of the extension wires 2 may be greater, and each extension wire 2 may be clamped by a corresponding groove structure 510.

Further, the wire carrying terminal 50 is provided with a smooth outer surface, such as a generally cylindrical structure, to reduce discomfort to the patient during the wire-guiding process and to effectively prevent scratching of the subcutaneous capillaries during the wire-guiding process. Further, the second end b of the carrier wire terminal 50 may be provided as a tapered head, the outer diameter of which gradually increases from the second end b to the first end a. The conical head can reduce lead resistance and also reduce damage to blood vessels. The shape of the groove structure 510 is not particularly limited in the present application, but in general, the shape of the groove structure 510 is matched with the shape of the connector 22, and the fixing and sealing effects are better. In one embodiment, the second groove 52 matching the small diameter section 222 of the connector 22 may be configured to have a cross-sectional shape of a substantially "C", the processing difficulty of the "C" groove is low, and the first groove 51 matching the large diameter section 221 of the connector 22 may be configured to have a substantially small bottom and large mouth, so as to better fix the connector 22.

Preferably, the groove wall of the groove structure 510 near the second end b (as shown at 512 in fig. 4) has a guiding slope for guiding the connector 22 to be inserted into the groove structure 510, so as to reduce the difficulty of inserting the connector 22 into the groove and reduce the damage of the connector 22.

The use of the subcutaneous implant tool of the present invention will be further described.

The preferred embodiment of the invention also provides a method for using the subcutaneous implantation of the extension lead for deep brain electrical stimulation, which comprises the following operation processes:

first, as shown in fig. 7, the tunneling terminal 40 is attached to one end of the tunneling rod 11, and then the tunneling terminal 40 is pierced through the skin second incision 5 via the skin first incision 4, and the tunneling terminal 40 is pierced through the skin second incision 5. Wherein the first skin incision 4 is located behind the ear and the second skin incision 5 is located below the collarbone.

Then, as shown in fig. 8, the tunneling making terminal 40 is detached from the tunneling making rod 11, the carrier terminal 50 is mounted at one end of the tunneling making rod 11, then the connector 22 on the extension lead 2 is clamped in the groove structure 510 on the carrier terminal 50, and the connector 22 of the extension lead 2 is tightly clamped through the first groove 51 and the second groove 52, so as to achieve fixation. Then, the tunneling rod 11 is pulled to drive the extension wire 2 to push out along the skin second incision 5 to the skin first incision 4.

Finally, as shown in fig. 9, the connector 22 is separated from the carrier terminal 50, then the connector of the electrode 3 is inserted into the end face electrode insertion hole 201 of the connector 22, and then the fastener is connected and fixed with the fastener operation hole 202 on the side face of the connector 22, thereby completing the connection process of the extension lead 2 and the electrode 3. As shown in fig. 10, one end 21 of the extension lead 2 is inserted into the connecting hole of the implanted pulse generator 1, and then connected and fixed by a fastener, and finally the connection process of the pulse generator 1, the extension lead 2 and the electrode 3 is completed.

In summary, the connector 22 of the extension lead 2 is embedded in the groove structure 510 on the side of the carrier terminal 40, so that the carrier terminal 40 drives the extension lead 2 to pass through the incision on the skin and be implanted subcutaneously. So configured, the overall diameter of the carrier terminal 50 and the connector 22 after being matched is not too large, the lead resistance can be reduced, the lead difficulty is reduced, the whole connector 22 is prevented from being inserted into the carrier terminal 50, the carrier terminal 50 is prevented from being inserted into the connector 22, the connector 22 is not required to be radially screwed down by a screw, the damage to the connector 22 of the extension lead 2 in the carrier process can be effectively prevented, the service life of the connector 22 is prolonged, meanwhile, the end face jacks and radial screw holes of the connector 22 can be plugged by the groove wall of the groove structure 510, the waterproof sealing effect is good, and the damage to the connector 22 can be further reduced.

In particular, the invention can arrange a plurality of groove structures 510, and each groove structure 510 can clamp one extension lead 2, thereby realizing the purpose of simultaneously implanting at least two extension leads 2 under the skin, expanding the application range of the subcutaneous implantation tool and being more convenient to use. In particular, all the groove structures 510 are staggered in the axial direction of the carrier wire terminal 50, so that the problem of overlarge overall diameter caused by parallel connectors 22 on a plurality of extension wires 2 can be solved, the overall diameter of the carrier wire terminal can be effectively reduced, the damage to a patient can be reduced, and the difficulty of wire leading can be reduced.

It should be understood that the above description is only a preferred embodiment of the present invention, and is not limited in any way or nature, and that the innovations of the present invention, while derived from implantable deep brain electrical stimulation, are applicable to other implantable neural electrical stimulation technology fields, as will be understood by those skilled in the art.

It should be noted that several modifications and additions will be possible to those skilled in the art without departing from the method of the invention, which modifications and additions should also be considered as within the scope of the invention. Equivalent embodiments of the present invention will be apparent to those skilled in the art having the benefit of the teachings disclosed herein, when made with the changes, modifications, and variations to the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims (12)

1. The wire carrying terminal is used for clamping an extension wire, one end of the extension wire is provided with a connector, and the wire carrying terminal is characterized in that a groove structure is arranged on the side face of the wire carrying terminal; the groove structure is used for embedding the connector with at least part of the length; one side of the groove structure extending axially penetrates through the first end part of the wire carrying terminal, and the other side of the groove structure extending axially is in a blocking state with the second end part of the wire carrying terminal.

2. The wire carrying terminal of claim 1, wherein the groove structure comprises a plurality of grooves which are sequentially penetrated along the axial direction, and the cross-sectional dimensions of the plurality of grooves are different from each other; wherein the most proximal one of the grooves is in a blocking state with the second end portion, and the most distal one of the grooves penetrates through the first end portion.

3. The carrier terminal of claim 2, wherein a plurality of the grooves decrease in cross-sectional dimension in sequence from the second end portion to the first end portion of the carrier terminal.

4. A wire carrying terminal according to claim 3 wherein the groove structure comprises two of the grooves; one of the grooves at the nearest end is used for clamping the whole large-diameter section on the connecting head; one of the grooves at the most distal end is used for clamping a small-diameter section of a part of the length on the connector.

5. A wire carrying terminal according to claim 3 wherein the groove structure comprises three of the grooves; one of the grooves at the nearest end is used for clamping the whole large-diameter section on the connecting head; the middle groove is used for clamping the whole small-diameter section on the connecting head; one of the grooves at the most distal end is used for clamping part of the wire body of the extension wire.

6. The wire-carrying terminal of claim 2 wherein at least a portion of the groove has a radial depth greater than or equal to a maximum outer diameter of a section of the connector head that mates with the groove.

7. The carrier wire terminal according to any one of claims 1 to 6, wherein the number of the groove structures is plural, and all the groove structures are arranged at intervals in the circumferential direction of the carrier wire terminal and are staggered in the axial direction of the carrier wire terminal; each groove structure is used for clamping one extension wire.

8. The wire-carrying terminal of any one of claims 1-6 wherein a groove wall of the groove structure proximate the second end has a guide ramp for guiding insertion of the connector head into the groove structure.

9. The carrier wire terminal of any one of claims 1-6, wherein the carrier wire terminal has a smooth outer surface.

10. A subcutaneous implantation tool for establishing a subcutaneous tunnel for implanting an extension lead into a predetermined subject through the subcutaneous tunnel, comprising:

a tunneling terminal;

the carrier wire terminal of any one of claims 1-9; the method comprises the steps of,

and one end of the tunneling rod is selectively detachably connected with the tunneling terminal or the line carrying terminal.

11. The subcutaneous implantation tool according to claim 10, further comprising:

the other end of the tunneling rod is connected with the handle.

12. The subcutaneous implantation tool according to claim 10 or 11, further comprising:

a tunnel-creating tube removably sleeved over the tunnel-creating rod, and configured to be restrained from movement in an axial direction relative to the tunnel-creating rod.

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