CN217066535U - Carrier terminal and subcutaneous implantation tool - Google Patents

Abstract

The utility model relates to a carrier wire terminal and subcutaneous implantation tool, subcutaneous implantation tool includes the handle, makes the tunnel terminal, carrier wire terminal, makes the tunnel pole, and the one end of making the tunnel pole is connected the handle, and the other end can be dismantled selectively and connect and make the tunnel terminal or carrier wire terminal, and carrier wire terminal is used for the clamping extension wire, and the one end of extension wire is equipped with the connector, and the side of carrier wire terminal is equipped with groove structure, and groove structure is used for inlaying the connector of establishing at least partial length; one side of the groove structure extending axially penetrates through the first end part of the carrier terminal, and the other side of the groove structure extending axially and the second end part of the carrier terminal are in a blocking state. So the configuration, when reducing the diameter of carrier wire terminal and extension wire connector junction, sealing connector that can be better can also reduce the damage to the connector, improves the life of connector.

Description

Carrier terminal and subcutaneous implantation tool

Technical Field

The utility model relates to the technical field of medical equipment, in particular to carrier wire terminal and subcutaneous implantation instrument.

Background

Parkinson's Disease (PD) is a common degenerative Disease of the nervous system, and the average age of the Disease is about 60 years, which is common to the elderly. The most important pathological change of Parkinson's disease is the degenerative death of mesencephalic nigral Dopamine (DA) neurons, which causes a marked reduction in striatal DA content and causes disease. Parkinson's disease mainly presents with resting tremor, bradykinesia, gait disturbance of posture and the like, which can cause great influence on the life of patients.

With the development of modern medical science and technology, the Parkinson's disease can be effectively improved by stimulating the subthalamic nucleus or the internal nucleus of the globus pallidus by using the electrodes. The Deep Brain Stimulation (DBS) system used is shown in fig. 1 and includes a pulse generator (generally abbreviated as IPG)1, an extension lead 2 and an electrode 3. The electrode 3 is generally implanted into the brain by about 10cm, the rest of the electrode is embedded under the skin of the head, the other end of the electrode is placed behind the ear and 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 that is transmitted to the electrodes 3 via the subcutaneous extension leads 2 to the target area of the brain. If a patient has symptoms of resting tremor, gait disturbance, etc. on one side of the body (only the left or right side of the body), it is usually 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 usually necessary to implant 1 pulse generator 1, 2 extension wires 2 and 2 electrodes 3.

Currently, when the extension lead 2 is implanted subcutaneously, the extension lead 2 is connected to a carrier terminal of a tunneling tool, and the carrier terminal pulls the extension lead 2 through two incisions on the skin under the guidance of a puncture rod. The conventional methods for connecting the carrier terminal to the extension wire 2 mainly include: one is to insert the connector of the extension wire into the inner hole of the carrier terminal, the whole diameter of the carrier terminal is increased, the lead resistance is increased, the lead difficulty is increased, and the connector is particularly easy to damage; the other type is that the connecting rod of the carrier terminal is inserted into the connector of the extension wire and then is radially screwed and fixed through the screw, so that the screw needs to be disassembled and assembled for many times, the connector of the extension wire is extremely easy to damage, and the waterproof sealing effect cannot be achieved. In addition, there are also problems that the carrier terminal cannot be loaded with a plurality of extension wires at the same time, and the carrier terminal and the extension wire connector are easy to scratch blood vessels.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a carrier wire terminal and subcutaneous implantation instrument when reducing the diameter of carrier wire terminal and extension wire connector junction, sealing connector that can be better can also reduce the damage to the connector, improves the life of connector.

In order to achieve the purpose, the utility model provides a wire carrier terminal which is used for clamping an extension wire, one end of the extension wire is provided with a connector, and the side surface of the wire carrier terminal is provided with a groove structure; the groove structure is used for embedding the connector with at least partial length; one side of the axial extension of the groove structure is communicated with the first end part of the carrier terminal, and the other side of the axial extension of the groove structure is in a blocking state with the second end part of the carrier terminal.

Optionally, the groove structure includes a plurality of grooves that are sequentially penetrated along the axial direction, and cross-sectional dimensions of the plurality of grooves are different from each other; wherein a blocking state is provided between the most proximal one of the grooves and the second end portion, and the most distal one of the grooves penetrates 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 carrier terminal.

Optionally, the groove structure comprises two grooves; the most proximal groove is used for clamping the whole large-diameter section on the connector; the most far end of the groove is used for clamping a small-diameter section with partial length on the connecting head.

Optionally, the groove structure comprises three grooves; the most proximal groove is used for clamping the whole large-diameter section on the connector; the middle groove is used for clamping the whole small-diameter section on the connector; the most distal one of the grooves is used for clamping a part of the lead body of the extension lead.

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

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

Optionally, a groove wall of the groove structure near the second end portion has a guiding inclined surface 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 wire into a predetermined object through the subcutaneous tunnel, comprising:

a tunneling terminal;

and any of the carrier terminals; and the number of the first and second groups,

make the tunnel pole, make the one end of tunnel pole selectively with make the tunnel terminal or the year line terminal detachably connects.

Optionally, the subcutaneous implantation tool further comprises:

the other end of the tunnel making rod is connected with the handle.

Optionally, the subcutaneous implantation tool further comprises:

make the tunnel pipe, it establishes to make tunnel pipe detachably the cover make on the tunnel pole, just it is configured as for make the tunnel pole by the restriction removal in the axial.

The utility model discloses utilize the groove structure of carrier terminal side to inlay and establish and fix the connector that extends the wire, make the carrier terminal drive and extend the incision that the wire passed on the skin and implant subcutaneously. So dispose, make the whole diameter behind year line terminal and the connector cooperation can not be too big, can reduce the lead wire resistance, reduce the lead wire degree of difficulty, and avoided inserting the inside of year line terminal with whole connector, also avoided inserting the inside of connector with year line terminal, and need not radially tighten through the screw and fix, consequently, can effectively prevent to carry the damage of line in-process to extending the wire connector, improve the life of connector, groove structure's cell wall can shutoff terminal surface jack and the radial screw hole of connector simultaneously, water-proof sealing is effectual, can further reduce the damage of connector.

The utility model discloses a plurality of recesses in the usable groove structure are blocked to the district section of different external diameters on the connector and are established fixedly, so set up, can effectively reduce the risk that extends the wire and drop, ensure the firm nature of extension wire clamping.

The utility model discloses a radial degree of depth that will at least part of recess sets up to be more than or equal to the connector with the biggest external diameter in recess complex district section can avoid the connector outstanding in the outside of carrier wire terminal to prevent at the problem of lead wire in-process connector scratch subcutaneous capillary, reduce the damage to the patient, reduce the uncomfortable sense of the patient body.

The utility model discloses can set up groove structure into a plurality ofly, every groove structure can an extension wire of clamping to realize implanting subcutaneous purpose with two piece at least extension wires simultaneously, enlarged the range of application of subcutaneous implantation instrument, it is more convenient to use. Especially, all groove structure staggers the setting in the axial of year line terminal, can solve the too big problem of whole diameter that the connector on many extension wires caused side by side to can effectively reduce year line terminal whole diameter, reduce the damage to the patient, and reduce the lead wire degree of difficulty.

The utility model discloses utilize the direction inclined plane of groove structure's cell wall to guide the inserting of connector, can further reduce the degree of difficulty of clamping connector to reduce the damage to the connector. Additionally, the utility model discloses still set up to having glossy surface through carrying the line terminal, further prevent at the problem of lead wire in-process carrier wire terminal scratch subcutaneous capillary, reduce the damage to the patient.

Drawings

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

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

fig. 2a is a schematic view of the tunnel making rod and the tunnel making terminal according to the preferred embodiment of the present invention;

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

fig. 3 is a schematic view illustrating the connection between the tunnel making rod and the carrier terminal according to the preferred embodiment of the present invention;

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

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

fig. 5c is a cross-sectional view of a carrier terminal having a two-groove configuration according to a preferred embodiment of the present invention;

fig. 6a is a schematic view of an extended wire according to 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 by a subcutaneous implantation tool according to a preferred embodiment of the present invention;

FIG. 8 is a schematic view of the carrier terminal and extension wire assembly of the preferred embodiment of the present invention;

fig. 9 is a schematic diagram of an extension wire lead path according to a preferred embodiment of the present invention;

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

[ reference numerals are described below ]:

1-a pulse generator; 10-a handle; 11-making a tunnel rod; 2-extension wire; 21-extending one end of a wire; 22-a connector extending the other end of the wire; 201-end face electrode insertion hole; 202-fastener operating holes; 221-large diameter section; 222-a minor diameter section; 23-a lead body; 3-an electrode; 4-first incision of skin; 5-second incision of skin; 30-making a tunnel pipe; 40-tunneling terminals; 50-a carrier terminal; 510-groove structure; 511-the side of the groove structure extending axially; 512-the other side of the axial extension of the groove structure; 51-a first groove; 52-a second groove; 53-third groove; a-a first end of a carrier terminal; b-the second end of the carrier 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 of the specification. Of course, the invention is not limited to this specific embodiment, and general alternatives known to those skilled in the art are also covered by the scope of the invention. In the following embodiments, features of the embodiments can be supplemented with each other or combined with each other without conflict.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the 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" or "an," and the like, also do not denote a limitation of quantity, but rather denote the presence of at least one; "plurality" means two or more than two. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. Secondly, the present invention has been described in detail by using schematic diagrams, but these schematic diagrams are only for convenience of describing the examples of the present invention in detail, and should not be taken as limitations of the present invention. In the description of the present invention, "outer diameter" does not refer in particular to the case where the cross section is circular, if the cross section is non-circular, the outer diameter and the maximum width on the cross section. In the description of the present invention, "cross section" means a section perpendicular to the axis. In the description of the present invention, the "proximal end" is the end of the operator that is close to the subcutaneous implantation tool: "distal" is the end opposite the "proximal" end, i.e., the end distal from the operator of the subcutaneous implantation tool. In the description of the present invention, "radial" refers to a direction perpendicular to the axis; "circumferential" refers to a direction about an axis.

The utility model discloses a subcutaneous implantation tool for establish subcutaneous tunnel, in order to implant patient (predetermined object) internal through subcutaneous tunnel extension wire. The utility model discloses an extension wire is mainly the wire on the implanted nerve electrical stimulation system, and implanted nerve electrical stimulation system releases the electro photoluminescence through implanting the electrode in human body such as motor nerve, the specific nerve department of sensory nerve to stimulate specific nerve, thereby make the human function resume the state of normal function. The electric pulse signals generated by the implanted nerve electric stimulator are transmitted to the electrodes through the extension leads.

The utility model discloses an implanted nerve electrical stimulation system mainly includes implanted Deep Brain Stimulation (DBS), implanted cortex stimulation (CNS), implanted spinal cord electrical stimulation system (SCS), implanted sacral nerve electrical stimulation system (SNS), implanted vagus nerve electrical stimulation system (VNS) etc.. Known implantable electrical nerve stimulation systems generally include a pulse generator, electrodes, extension leads, and a control device. Wherein the pulse generator is connected to an extension lead which in turn is connected to the electrode, whereby pulses generated by the pulse generator are transmitted to the electrode for electrical stimulation of the nerve.

The utility model discloses a subcutaneous implantation tool which comprises a tunnel making terminal, a wire carrying terminal and a tunnel making rod; one end of the tunnel making rod is selectively detachably connected with the tunnel making terminal or the wire loading terminal; the tunneling terminal is used for puncturing the skin and puncturing a second incision of the skin through a first incision of the skin so as to establish a subcutaneous tunnel; after the subcutaneous tunnel is established, detaching the tunnel making terminal from the tunnel making rod, installing the wire carrying terminal at the other end of the tunnel making rod, clamping a connector of the extension wire by the wire carrying terminal, pulling the tunnel making rod, and driving the extension wire to move to the first cut of the skin along the second cut of the skin and penetrate out; finally, the carrier terminal is separated from the extension lead connector, and then the connector is connected with the electrode connector to complete the connection process of the extension lead and the electrode.

In order to solve one or more technical problem that current tunneling tool exists, the utility model discloses a carrier wire terminal inlays the connector of establishing the at least partial length that extends wire one end through the groove structure of side, reaches the purpose of clamping and fixed extension wire. It should be understood that the utility model discloses a groove structure is connected with the actual interference fit of connector to reach the effect that groove structure inlays and establishes (including the card establishes) the connector. By the structure, the whole connector is not required to be inserted into the carrier terminal, so that the overall diameter of the carrier terminal after being matched with the connector is not too large, the lead resistance can be reduced, the lead difficulty is reduced, the carrier terminal is not required to be inserted into the connector, and the carrier terminal is not required to be radially screwed and fixed through a screw, so that the damage to the extension wire connector in the carrier process can be effectively prevented, and the service life of the connector is prolonged. Especially, the utility model discloses a for blocking the state between one side of groove structure axial extension and the second end of carrier wire terminal, so set up, can utilize groove structure's bottom cell wall and side cell wall to come terminal surface jack and the radial screw hole of shutoff connector, reach sealing connector's effect to play water proof sealing's effect, can further reduce the damage of connector.

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

Referring to fig. 2a, 2b and 3, a preferred embodiment of the present invention discloses a subcutaneous implantation tool, which includes a handle 10, a tunneling rod 11, a tunneling terminal 40 and a wire carrying terminal 50; of these, the handle 10 is the preferred construction. In addition, the tunneling rod 11 is preferably a solid rod-shaped structure, so as to reduce the diameter of the tunneling rod 11 and reduce the resistance in the process of extending the lead of the lead. 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 these components made of metal materials have sufficient strength and toughness, so that the connection reliability can be well ensured, and the components are prevented from falling off. And the outer surface of the carrier terminal 50 made of metal material is smoother, which can effectively prevent the subcutaneous capillary vessel from being scratched in the lead-in process.

One end of the tunneling rod 11 is selectively detachably connected with the tunneling terminal 40 or the wire-carrying terminal 50. The tunneling rod 11 can be connected with the tunneling terminal 40 or the carrier terminal 50 in various ways, and those skilled in the art can select the connection according to the needs. For example, the tunneling rod 11 can be snapped or screwed into the tunneling terminal 40 or the wire-carrying terminal 50. In this example, the tunneling rod 11 is screwed with the tunneling terminal 40 or the wire-carrying terminal 50.

The other end of the tunnel making rod 11 is preferably connected with a handle 10, and the handle 10 is arranged to facilitate the puncturing process. Make tunnel pole 11 and handle 10 and generally be split type structure, prefer both through injection moulding's mode fixed connection, joint strength is reliable, is convenient for the doctor and operates at the puncture in-process. Therefore, the material of the handle 10 is generally plastic, and conventional medical plastic can be used.

Preferably, the outer sleeve of the tunnel making rod 11 is provided with the tunnel making tube 30, and the tunnel making tube 30 is configured to be axially limited to move relative to the tunnel making rod 11, so as to prevent the tunnel making tube 30 from falling off on the one hand, and ensure the accuracy of the position of the tunnel making tube 30 on the other hand. The tunnel making tube 30 can be made of medical plastic materials with lower friction coefficient, so that the lead resistance of the tunnel making rod 11 in the body can be greatly reduced, and the pain of a patient is reduced. The material of the tunnel-making pipe 30 can be, for example, a high molecular material with a low friction coefficient, such as nylon, polytetrafluoroethylene, and ultra-high molecular weight polyethylene, and is not limited in particular.

Referring to fig. 6a and 6b, the preferred embodiment of the present invention further provides an extension wire 2, one end 21 of the extension wire 2 is connected to the pulse generator, the other end is provided with a connector 22, and the connector 22 is detachably connected to the wire carrying terminal 50. The connector 22 generally has an end face electrode insertion hole 201 (i.e., an end face insertion hole), the end face electrode insertion hole 201 being used for connection with an electrode, and the connector 22 also has a fastener operation hole 202 (i.e., a radial screw hole) on a side face, the fastener operation hole 202 being used 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 carrier terminal 50, and the groove structure 510 is used for embedding at least a portion of the length of the connector 22, 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 groove structure 510 extending axially extends through first end a of carrier terminal 50, and the other side 512 of groove structure 510 extending axially is blocked (i.e., does not extend through) from second end b of carrier terminal 50. In practical use, when the extension lead 2 is engaged with the groove structure 510, the terminal electrode insertion hole 201 and the fastener operation hole 202 of the connector 22 are engaged with the wall of the groove structure 510. So set up, can utilize groove structure 510's cell wall sealing connector 22's terminal surface and side to play waterproof sealing's effect, utilize groove structure 510 of the side of carrier wire terminal 50 to come clamping connector 22 simultaneously, can reduce the damage to connector 22 in the assembling process, can establish the mode through interference fit's inlaying again and realize firm fixed, effectively prevent to extend wire 2 and drop.

In some examples, groove structure 510 is configured to engage a portion of the length of connector 22, i.e., groove structure 510 has an axial length that is less than the axial length of connector 22, and carrier terminal 50 has a smaller length, such as shown in fig. 4. In other examples, groove structure 510 is configured to receive the entire length of connector 22, i.e., groove structure 510 has an axial length greater than or equal to the axial length of connector 22, and carrier terminal 50 has a longer length, such as shown in fig. 5a and 5 b.

Generally, when the number of extension leads 2 is one, it is sufficient to clamp the extension leads 2 by the shorter carrier terminals 50. As shown in fig. 4, in an embodiment, only one groove structure 510 is disposed on a side surface of the carrier terminal 50, the one groove structure 510 is used for guiding a lead wire 2, the connector 22 of the extension lead wire 2 is clamped in the groove structure 510 on the carrier terminal 50, an axial length of the groove structure 510 is smaller than an axial length of the connector 22, and after the clamping, the connector 22 is fixed by an interference fit between the groove structure 510 and the connector 22.

The connecting head 22 of the extension wire 2 usually has different outer diameters, and in this case, in order to achieve more secure fixation, the groove structure 510 is configured to include a plurality of grooves which are sequentially communicated in the axial direction, and the cross-sectional dimensions (i.e., cross-sectional areas) of the plurality of grooves are different from each other; the grooves are used to respectively clamp sections with different outer diameters on the connector 22 and are connected with the corresponding sections in an interference fit manner. Wherein, a blocking state is formed between the most proximal groove and the second end part b, and the most distal groove penetrates through the first end part a. Further, the cross-sectional dimensions of the plurality of grooves decrease sequentially from second end b to first end a of carrier terminal 50 to accommodate sections of different outer diameters of connector 22.

As shown in fig. 6b, the connecting head 22 has a large diameter section 221 and a small diameter section 222 connected in sequence in the axial direction, a connecting terminal electrically connected to the electrode is disposed in the large diameter section 221, the small diameter section 222 is connected to 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 lead 2 inside the patient. And the outside of connector 22 covers usually has the protective sheath of elastic material such as silica gel to utilize the elastic deformation of protective sheath, realize that connector 22 is connected with the interference fit of groove structure 510, the protective sheath still plays certain waterproof sealing effect certainly.

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

In another embodiment, the groove structure 510 includes three grooves for accommodating 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 respectively a first groove 51, a second groove 52 and a third groove 53 which are sequentially communicated along the axial direction; different from the above, the second groove 52 is used for clamping the small-diameter section 222 of the whole length, and also clamping a part of the lead body 23 through the third groove 53, and is connected with the lead body 23 in an interference fit manner.

In order to prevent the connector 22 from scratching subcutaneous capillaries during the wire leading process, it is preferable that the radial depth of at least a part of the groove is greater than or equal to the maximum outer diameter of the section of the connector 22 engaged with the groove, so that at least a part of the outer surface of the connector 22 is flush with the side surface of the carrier terminal 50 or lower than the height of the side surface of the carrier terminal 50. It is of course more preferred that the radial depth of all recesses is larger than the largest outer diameter of the section of the connection head 22 cooperating with the recess, so that the entire connection head 22 does not come into contact with tissue.

In addition, when deep electrical stimulation of the brain is performed, the number of extension wires 2 used may vary depending on the number of electrodes. When the number of the extension wires 2 is two or more, the carrier terminal 50 is provided with a groove structure 510 into which a plurality of extension wires 2 are fed.

Referring to fig. 5a to 5c, the side surface of the wire terminal 50 is provided with a plurality of groove structures 510, and each groove structure 510 is used for clamping an extension wire 2.

In order to avoid the problem of excessive overall diameter caused by the parallel arrangement of the connectors 22 on the extension wires 2, it is preferable to stagger the axial positions of all the groove structures 510, i.e. to reduce the overall diameter of the carrier terminal 50, so as to effectively prevent the subcutaneous capillary vessel from being scratched during the wire leading process. Specifically, all of the groove structures 510 are spaced apart in the circumferential direction of the carrier terminal 50 and are staggered in the axial direction of the carrier terminal 50, i.e., the grooves of all of the groove structures 510 are not on the same circumference, but are at different axial positions, which increases the axial length of the carrier terminal 50 to some extent. Of course, the number of the extension wires 2 may be more, and each extension wire 2 is clamped by a corresponding one of the groove structures 510.

Further, the carrier terminal 50 is configured to have a smooth outer surface, such as a substantially cylindrical structure, to reduce discomfort to the patient during the threading procedure and to effectively prevent scratching of subcutaneous capillaries during the threading procedure. Further, second end b of carrier terminal 50 may be provided as a tapered head having an outer diameter that gradually increases from second end b to first end a. The conical head can reduce the lead resistance and reduce the damage to blood vessels. The shape of the groove structure 510 is not particularly limited, but generally, the shape of the groove structure 510 matches the shape of the connecting head 22, so that the fixing and sealing effects are better. In one embodiment, the second groove 52 engaged with the small diameter section 222 of the connecting head 22 may be configured to have a cross-sectional shape of a substantially "C", which is less difficult to machine, while the first groove 51 engaged with the large diameter section 221 of the connecting head 22 may be configured to have a substantially smaller bottom and a larger opening to better fix the connecting head 22.

Preferably, a groove wall (e.g. 512 in fig. 4) of the groove structure 510 near the second end b has a guiding inclined surface, and the guiding inclined surface is used to guide the connection head 22 to be inserted into the groove structure 510, so as to reduce the difficulty of inserting the connection head 22 into the groove and also reduce the damage to the connection head 22.

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

The preferred embodiment of the present invention further provides a method for using the subcutaneous implantation of the extension lead for deep brain electrical stimulation, which specifically includes the following steps:

first, as shown in fig. 7, the tunneling terminal 40 is attached to one end of the tunneling rod 11, and then the first incision 4 is punctured into the second incision 5, so that the tunneling terminal 40 is passed through the second incision 5. Wherein the first incision of the skin 4 is located behind the ear and the second incision of the skin 5 is located below the clavicle.

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

Finally, as shown in fig. 9, the connector 22 is separated from the carrier terminal 50, the connector of the electrode 3 is inserted into the terminal insertion hole 201 of the end face of the connector 22, and 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 fixed by a fastener, thereby completing the connection process of the pulse generator 1, the extension lead 2 and the electrode 3.

To sum up, the utility model discloses utilize groove structure 510 of carrier terminal 40 side to inlay the connector 22 of establishing extension wire 2, make carrier terminal 40 drive extension wire 2 and pass the incision on the skin and implant subcutaneously. So dispose, make the whole diameter behind carrier terminal 50 and the cooperation of connector 22 not too big, can reduce the lead wire resistance, reduce the lead wire degree of difficulty, and avoided inserting whole connector 22 into the inside of carrier terminal 50, also avoided inserting carrier terminal 50 into the inside of connector 22, and need not radially tighten fixed connector 22 through the screw, consequently, can effectively prevent the damage of carrier in-process to the connector 22 of extension wire 2, improve the life of connector 22, groove structure 510's cell wall can shutoff connector 22's terminal surface jack and radial screw hole simultaneously, water-proof sealing is effectual, can further reduce the damage of connector 22.

Particularly, the utility model discloses can set up groove structure 510 into a plurality ofly, every groove structure 510 can be an extension wire 2 of clamping to the realization is simultaneously with at least two extension wires 2 implantation subcutaneous mesh, has enlarged subcutaneous implantation instrument's range of application, and it is more convenient to use. Particularly, all the groove structures 510 are arranged in a staggered manner in the axial direction of the carrier terminal 50, so that the problem of overlarge overall diameter caused by parallel connection of the connectors 22 on the extension wires 2 can be solved, the overall diameter of the carrier terminal can be effectively reduced, the damage to a patient is reduced, and the lead difficulty is reduced.

It should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and substantially, and that the innovations of the present invention, although derived from implanted deep brain electrical stimulation, can be understood by those skilled in the art that the subcutaneous implantation tool and its carrier terminal of the present invention can also be applied to other implanted electrical nerve stimulation fields.

It should be noted that, for a person skilled in the art, several improvements and additions can be made without departing from the method of the invention, which shall also be considered as the scope of protection of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements to those skilled in the art without departing from the spirit and scope of the present invention, which should be construed as broadly as the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims (12)

1. A carrier terminal is used for clamping an extension wire, and one end of the extension wire is provided with a connector; the groove structure is used for embedding the connector with at least partial length; one side of the groove structure axially extending penetrates through the first end portion of the carrier terminal, and the other side of the groove structure axially extending and the second end portion of the carrier terminal are in a blocking state.

2. The carrier terminal as in claim 1, wherein the recess structure includes a plurality of recesses extending axially therethrough, the recesses having cross-sectional dimensions that differ from one another; wherein a blocking state is provided between the most proximal one of the grooves and the second end portion, and the most distal one of the grooves penetrates the first end portion.

3. The carrier terminal as defined in claim 2, wherein a plurality of said grooves decrease in cross-sectional dimension sequentially from said second end to said first end of said carrier terminal.

4. The carrier terminal as claimed in claim 3, wherein said recess structure includes two of said recesses; the most proximal groove is used for clamping the whole large-diameter section on the connector; the most far end of the groove is used for clamping a small-diameter section with partial length on the connecting head.

5. The carrier terminal as claimed in claim 3, wherein said recess arrangement includes three of said recesses; the most proximal groove is used for clamping the whole large-diameter section on the connector; the middle groove is used for clamping the whole small-diameter section on the connector; the most distal one of the grooves is used for clamping a part of the lead body of the extension lead.

6. The carrier terminal of claim 2, wherein at least some of the grooves have a radial depth greater than or equal to a maximum outer diameter of a section of the connector that mates with the groove.

7. The carrier terminal as claimed in any one of claims 1-6, wherein said recess formations are plural in number, all of said recess formations being spaced circumferentially of said carrier terminal and offset axially of said carrier terminal; each groove structure is used for clamping one extension lead.

8. The wire carrier terminal as in any one of claims 1-6, wherein a wall of the recess structure proximate the second end portion has a guide ramp for guiding insertion of the connector into the recess structure.

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

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

a tunneling terminal;

the carrier terminal of any one of claims 1-9; and the number of the first and second groups,

make the tunnel pole, make the one end of tunnel pole selectively with make the tunnel terminal or the year line terminal detachably connects.

11. The subcutaneous implant tool as in claim 10, further comprising:

the other end of the tunnel making rod is connected with the handle.

12. The subcutaneous implant tool as in claim 10 or 11, further comprising:

make the tunnel pipe, it establishes to make tunnel pipe detachably the cover make on the tunnel pole, just it is configured as for make the tunnel pole by the restriction removal in the axial.

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