Wire puncture structure and medical tool

Abstract

The utility model relates to the technical field of medical instruments, and discloses a wire puncture structure and a medical tool. Wherein the wire puncture structure comprises a puncture cannula, a connecting sleeve and a wire, and the puncture cannula is provided with a guide hole; the connecting sleeve can extend into the guide hole and is detachably connected to the puncture cannula, and a fixing hole is formed in the connecting sleeve; the wire is connected to the fixing hole. When the puncture sleeve is used, a channel is formed under the skin, the puncture sleeve is placed in the subcutaneous channel, at the moment, the middle of the puncture sleeve is located in the channel, the two ends of the puncture sleeve are located outside the channel, then the connecting sleeve extends into the guide hole from the first end of the puncture sleeve and is connected to the puncture sleeve, the second end of the puncture sleeve is dragged, and the puncture sleeve is inserted into the guide hole. The puncture cannula carries the connecting sleeve and the lead to be pulled out from a subcutaneous channel together, and subcutaneous implantation of the lead is achieved. According to the wire puncture structure, on one hand, the risk that the wire is loosened from the puncture sleeve on the half way when directly penetrating through the puncture sleeve is reduced; and on the other hand, the subcutaneous puncture efficiency of the wire is improved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a wire puncture structure and a medical tool. Background Art

[0002] At present, during the implantation of extension wires or electrode wires for deep brain stimulation in the market, a tunnel needs to be created first through a tunneler or a puncturer, a puncture cannula is reserved in the tunnel, and then the wire is passed through the puncture cannula to complete the subcutaneous implantation of the wire.

[0003] The existing methods in the market for passing a wire through a tunnel under the skin mainly involve directly passing it through the puncture cannula or adding an additional retractor to pull the wire out of the puncture cannula. However, due to the curvature of the puncture cannula and the soft material of the wire, when the wire is directly passed through the puncture cannula, it is easy to get stuck in a certain part of the tunnel inside the puncture cannula, resulting in the inability to pass through smoothly. At this time, dragging the puncture cannula easily causes the wire to fall off from the puncture cannula; while adding an additional retractor makes the process more cumbersome and increases the surgical difficulty.

[0004] Based on this, there is an urgent need for a wire puncture structure and a medical tool to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this application is to provide a wire puncture structure and a medical tool, which can reduce the risk of the wire becoming loose from the puncture cannula halfway when the wire directly passes through the puncture cannula; and improve the efficiency of wire puncture under the skin.

[0006] To achieve the above object, this application adopts the following technical solutions:

[0007] On the one hand, a wire puncture structure is provided, including:

[0008] A puncture cannula, which is provided with a guiding hole;

[0009] A connecting sleeve, which can extend into the guiding hole and is detachably connected to the puncture cannula, and the connecting sleeve is provided with a fixing hole;

[0010] A wire, which is connected to the fixing hole.

[0011] As a preferred technical solution of the wire puncture structure, the puncture cannula is provided with a first clamping portion, and the outer wall of the connecting sleeve is provided with a second clamping portion, and the second clamping portion is clamped to the first clamping portion.

[0012] As a preferred technical solution of the wire puncture structure, the outer wall of the connecting sleeve is provided with elastic arms, and the elastic arms are in interference fit with the inner wall of the puncture cannula.

[0013] As a preferred technical solution of a wire piercing structure, a limiting post is provided on a side of the elastic arm away from the connecting sleeve, and the limiting post forms the second clamping portion.

[0014] As a preferred technical solution of a wire piercing structure, the first clamping portion is a limiting hole; or

[0015] The first clamping portion is a limiting groove, and the limiting groove extends circumferentially along the guiding hole.

[0016] As a preferred technical solution of a wire piercing structure, the puncture sleeve is made of a transparent material.

[0017] As a preferred technical solution of a wire piercing structure, a limiting protrusion is provided on an inner wall of one end of the guiding hole, and the limiting protrusion forms the first clamping portion. A limiting flange is provided around an outer wall of the connecting sleeve, and the limiting flange forms the second clamping portion. The limiting flange is provided with an avoidance opening for avoiding the limiting protrusion.

[0018] As a preferred technical solution of a wire piercing structure, there are at least two limiting protrusions and the avoidance openings, and the limiting protrusions and the avoidance openings correspond to each other one by one.

[0019] As a preferred technical solution of a wire piercing structure, two limiting flanges are provided at intervals on an outer wall of the connecting sleeve, a limiting gap is provided between the two limiting flanges, a width of the limiting gap along an extending direction of the guiding hole matches a width of the limiting protrusion along the extending direction of the guiding hole, and the limiting protrusion can move into the limiting gap.

[0020] As a preferred technical solution of a wire piercing structure, the wire is in interference connection with the fixing hole; or

[0021] The wire extends into the fixing hole, and a tying wire is bundled on an outer wall of the connecting sleeve so as to fix the wire in the fixing hole.

[0022] On the other hand, a medical tool is provided, including the wire piercing structure according to any one of the above solutions.

[0023] The beneficial effects of the present application are:

[0024] The present application provides a wire puncture structure and a medical tool. When in use, first, a channel is punctured under the skin, and a puncture cannula is placed into the channel under the skin. At this time, the middle of the puncture cannula is located inside the channel, and both ends of the puncture cannula are located outside the channel. Then, a connecting sleeve is inserted into the guiding hole from the first end of the puncture cannula and connected to the puncture cannula. At this time, the wire is connected to the puncture cannula through the connecting sleeve. The puncture cannula, the connecting sleeve, and the wire form an integral body. By dragging the second end of the puncture cannula, the puncture cannula drives the connecting sleeve and the wire to be pulled out from the channel under the skin together, realizing the subcutaneous implantation of the wire. On the one hand, this wire puncture structure reduces the risk that the wire loosens from the puncture cannula halfway when directly passing through the puncture cannula; on the other hand, it improves the efficiency of the wire puncture under the skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments of the present application. Obviously, the following-described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present application and these drawings.

[0026] Figure 1 is a schematic structural diagram of the wire puncture structure provided by the specific embodiment of the present application;

[0027] Figure 2 is one of the exploded structural diagrams of the wire puncture structure provided by the specific embodiment of the present application;

[0028] Figure 3 is a schematic structural diagram of the puncture cannula provided by the specific embodiment of the present application;

[0029] Figure 4 is the second exploded structural diagram of the puncture cannula provided by the specific embodiment of the present application.

[0030] The reference signs in the figures are as follows:

[0031] 1, puncture cannula; 11, guiding hole; 12, first clamping portion; 13, limiting protrusion;

[0032] 2, connecting sleeve; 21, second clamping portion; 22, elastic arm; 221, limiting post; 23, limiting flange; 24, avoidance opening; 25, stop rib; 26, fixing hole; 27, limiting gap;

[0033] 3, wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the convenience of description, only the parts related to the present application rather than all the structures are shown in the drawings.

[0035] In the description of the present application, unless otherwise clearly specified and defined, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0036] In the present application, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0037] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] Embodiment 1

[0039] The technical field and related terms of the embodiments of the present application will be briefly described below.

[0040] Implantable medical systems include implantable nerve electrical stimulation systems, implantable cardiac electrical stimulation systems (also known as cardiac pacemakers), implantable drug delivery systems (Implantable Drug Delivery System, abbreviated as IDDS), and lead transfer systems, etc. Implantable nerve electrical stimulation systems are, for example, deep brain stimulation systems (Deep Brain Stimulation, abbreviated as DBS), implantable cerebral cortex stimulation systems (Cortical Nerve Stimulation, abbreviated as CNS), implantable spinal cord stimulation systems (Spinal Cord Stimulation, abbreviated as SCS), implantable sacral nerve stimulation systems (Sacral Nerve Stimulation, abbreviated as SNS), implantable vagus nerve stimulation systems (Vagus Nerve Stimulation, abbreviated as VNS), etc.

[0041] The implantable nerve electrical stimulation system includes a stimulator (i.e., implantable nerve stimulator) implanted in the patient's body and a programming device arranged outside the patient's body. That is to say, the stimulator is a medical device, or rather, the medical device includes the stimulator. The related neuromodulation technology mainly implants electrodes (the electrodes are, for example, in the form of electrode leads) at specific sites (i.e., target points) of the tissue of the organism through stereotactic surgery, and sends electrical pulses to the target points through the electrodes to regulate the electrical activities and functions of the corresponding nerve structures and networks, thereby improving symptoms and relieving pain.

[0042] As an example, DBS includes an IPG (Implantable Pulse Generator, implantable pulse generator), an extension lead, and an electrode lead. The IPG is connected to the electrode lead through the extension lead. The IPG is implanted in the patient's body, for example, implanted in front of the patient's chest or other internal body parts.

[0043] As another example, DBS includes an IPG and an electrode lead, and the IPG is directly connected to the electrode lead. The IPG is implanted in the patient's head. For example, a slot is cut in the patient's skull, and then the IPG is installed in the slot of the skull. In this case, the IPG may not protrude from the outer surface of the skull, or may partially protrude from the outer surface of the skull.

[0044] Among them, the IPG responds to the programming instructions sent by the programming device and provides controllable electrical stimulation therapy (or electrical stimulation energy) to the internal tissues by relying on a sealed battery and a circuit. The IPG delivers one or more channels of controllable specific electrical stimulation to a specific area of the internal tissues through the electrode lead.

[0045] In some embodiments, the extension lead is used in cooperation with the IPG as a transmission medium for electrical stimulation to transmit the electrical stimulation generated by the IPG to the electrode lead.

[0046] In some embodiments, electrical stimulation can be delivered in the form of a pulsed signal or in the form of a non-pulsed signal. For example, the electrical stimulation can be delivered as a signal having various waveform shapes, frequencies, and amplitudes. Thus, the electrical stimulation in the form of a non-pulsed signal can be a continuous signal, which can have a sinusoidal waveform or other continuous waveforms.

[0047] After receiving the electrical stimulation transmitted by the IPG or the extension wire, the electrode lead delivers the electrical stimulation to a specific area of the body tissue through a plurality of electrode contacts. The stimulator is provided with, for example, one or more electrode leads on one side or both sides, and a plurality of electrode contacts are provided on the electrode lead. The electrode contacts can be arranged uniformly or non-uniformly in the circumferential direction of the electrode lead. As an example, the electrode contacts can be arranged in a 4-row and 3-column array (a total of 12 electrode contacts) in the circumferential direction of the electrode lead. The electrode contacts can include stimulating electrode contacts and / or acquisition electrode contacts. The electrode contacts can be in the shape of, for example, a sheet, a ring, a dot, etc.

[0048] In some embodiments, the body tissue to be stimulated can be the patient's brain tissue, and the stimulated site can be a specific site of the brain tissue. When the patient's disease types are different, the stimulated sites are generally different, and the number of stimulating contacts (single-source or multi-source), the application of one or more (single-channel or multi-channel) specific electrical stimulations, and the stimulation parameters (values) are also different.

[0049] The embodiments of the present application do not limit the applicable disease types, which can be the disease types applicable to deep brain stimulation (DBS), spinal cord stimulation (SCS), sacral nerve stimulation, gastric stimulation, peripheral nerve stimulation, and functional electrical stimulation. Among them, the disease types that DBS can be used to treat or manage include, but are not limited to: spastic diseases (such as epilepsy), pain, migraine, mental diseases (such as major depressive disorder (MDD)), bipolar disorder, anxiety disorder, post-traumatic stress disorder, dysthymia, obsessive-compulsive disorder (OCD), behavioral disorders, mood disorders, memory disorders, psychological state disorders, movement disorders (such as essential tremor or Parkinson's disease), Huntington's disease, Alzheimer's disease, drug addiction, autism, or other neurological or psychiatric diseases and impairments.

[0050] In the embodiments of the present application, when the programming device and the stimulator establish a programming connection, the programming device can be used to adjust one or more stimulation parameters of the stimulator (or one or more stimulation parameters of the pulse generator, and the electrical stimulations corresponding to different stimulation parameters are different), or the stimulator can sense the electrophysiological activity of the patient to collect electrophysiological signals, and the stimulation parameters of the stimulator can be further adjusted through the collected electrophysiological signals to achieve closed-loop control (or adaptive adjustment) of the stimulation parameters.

[0051] Stimulation parameters may include at least one of the following: electrode contact identification for delivering electrical stimulation (such as electrode contact 2# and electrode contact 3#), frequency (such as the number of electrical stimulation pulse signals within a unit time of 1 s, with the unit of Hz), pulse width (the duration of each pulse, with the unit of μs), amplitude (generally expressed by voltage, that is, the intensity of each pulse, with the unit of V), timing sequence (such as continuous or burst, where burst refers to a discontinuous timing behavior composed of multiple processes), stimulation mode (including one or more of current mode, voltage mode, timed stimulation mode, and cyclic stimulation mode), upper and lower limits controlled by the doctor (the adjustable range by the doctor), and upper and lower limits controlled by the patient (the range that the patient can adjust independently).

[0052] In some embodiments, the stimulation parameters of the stimulator can be adjusted in current mode or voltage mode.

[0053] The programming device may include a doctor programming device (i.e., the programming device used by the doctor) and / or a patient programming device (i.e., the programming device used by the patient). The doctor programming device is, for example, an intelligent terminal device such as a tablet computer, a notebook computer, a desktop computer, a mobile phone, etc. equipped with programming software. The patient programming device is, for example, an intelligent terminal device such as a tablet computer, a notebook computer, a desktop computer, a mobile phone, etc. equipped with programming software. The patient programming device may also be other electronic devices with programming functions (such as a charger with programming functions, an electrophysiological acquisition device, etc.).

[0054] As Figure 1 shown, this embodiment provides a medical tool, including a wire puncture structure. The wire puncture structure includes a puncture cannula 1, a connecting sleeve 2, and a wire 3. The puncture cannula 1 is provided with a guiding hole 11; the connecting sleeve 2 can extend into the guiding hole 11 and is detachably connected to the puncture cannula 1. The connecting sleeve 2 is provided with a fixing hole 26; the wire 3 is connected to the fixing hole 26. During use, first, a channel is punctured under the skin, and the puncture cannula 1 is placed into the channel under the skin. At this time, the middle of the puncture cannula 1 is located inside the channel, and both ends of the puncture cannula 1 are located outside the channel. Then, the connecting sleeve 2 is extended from the first end of the puncture cannula 1 into the guiding hole 11 and connected to the puncture cannula 1. At this time, the wire 3 is connected to the puncture cannula 1 through the connecting sleeve 2. The puncture cannula 1, the connecting sleeve 2, and the wire 3 form an integral body. By dragging the second end of the puncture cannula 1, the puncture cannula 1 drives the connecting sleeve 2 and the wire 3 to be pulled out from the channel under the skin together, realizing the subcutaneous implantation of the wire 3. On the one hand, this wire puncture structure reduces the risk that the wire 3 becomes loose from the puncture cannula 1 halfway when directly passing through the puncture cannula 1; on the other hand, it improves the efficiency of the wire 3 puncturing under the skin.

[0055] In this embodiment, as Figure 2 and Figure 3As shown in the figure, the puncture cannula 1 is provided with a first clamping portion 12, and the outer wall of the connecting sleeve 2 is provided with a second clamping portion 21. The second clamping portion 21 is clamped to the first clamping portion 12, realizing the detachable connection of the connecting sleeve 2 to the inner wall of the puncture cannula 1.

[0056] Specifically, the outer wall of the connecting sleeve 2 is provided with elastic arms 22, and the elastic arms 22 are in interference fit with the inner wall of the puncture cannula 1, realizing the connection of the connecting sleeve 2 to the inner wall of the puncture cannula 1. In this embodiment, the elastic arms 22 are in an arch shape so that the elastic arms 22 can generate elastic deformation.

[0057] Preferably, a limiting post 221 is provided on the side of the elastic arm 22 away from the connecting sleeve 2, and the limiting post 221 forms the second clamping portion 21. During the process of the connecting sleeve 2 extending into the guiding hole 11, the limiting post 221 and the elastic arm 22 contract inward under the interference of the inner wall of the puncture cannula 1. When the connecting sleeve 2 extends to a preset position, the elastic arm 22 resumes deformation, and the limiting post 221 is clamped within the first clamping portion 12.

[0058] In this embodiment, the first clamping portion 12 is a limiting groove, and the limiting groove extends along the circumferential direction of the guiding hole 11. The limiting boss extends into the limiting groove to realize clamping. In other embodiments, the first clamping portion 12 is a limiting hole, and the limiting post 221 extends into the limiting hole to realize clamping.

[0059] Preferably, the puncture cannula 1 is made of a transparent material, which is convenient for observing the relative position of the limiting post 221 and the first clamping portion 12, and is convenient for the limiting post 221 to be clamped with the limiting hole or the limiting groove. In this embodiment, both the first clamping portion 12 and the second clamping portion 21 are two. The two first clamping portions 12 are symmetrically arranged on the inner wall of the puncture cannula 1, and the two second clamping portions 21 are symmetrically arranged on the outer wall of the connecting sleeve 2. The first clamping portion 12 and the second clamping portion 21 correspond to each other one by one.

[0060] In this embodiment, the wire 3 extends into the fixing hole 26, and a tying wire is bundled on the outer wall of the connecting sleeve 2 to fix the wire 3 in the fixing hole 26. In other embodiments, the wire 3 is in interference connection with the fixing hole 26.

[0061] Preferably, two stop ribs 25 are arranged at intervals on the outer wall of the connecting sleeve 2, and the stop ribs 25 are arranged in a ring shape on the outer wall of the connecting sleeve 2. The tying wire is placed between the two stop ribs 25, and the two stop ribs 25 can limit the tying wire from moving along the length direction of the connecting sleeve 2, improving the connection stability between the wire 3 and the connecting sleeve 2.

[0062] Embodiment Two

[0063] As Figure 4As shown, this embodiment provides a wire piercing structure. The wire piercing structure provided in this embodiment is basically the same as that in the first embodiment, except that there are some differences in the first clamping portion 12 and the second clamping portion 21. The same structures as those in the first embodiment will not be described in detail in this embodiment.

[0064] In this embodiment, both the connecting sleeve 2 and the puncture sleeve 1 are made of rigid materials. A limiting protrusion 13 is provided on the inner wall at one end of the guiding hole 11, and the limiting protrusion 13 forms the first clamping portion 12. A limiting flange 23 is provided around the outer wall of the connecting sleeve 2, and the limiting flange 23 forms the second clamping portion 21. An avoidance opening 24 for avoiding the limiting protrusion 13 is provided on the limiting flange 23. When it is necessary to connect the connecting sleeve 2 and the puncture sleeve 1, align the avoidance opening 24 with the limiting protrusion 13, and the limiting protrusion 13 passes through the avoidance opening 24 so that the connecting sleeve 2 can extend into the guiding hole 11. Then rotate the connecting sleeve 2 so that the limiting protrusion 13 stops the limiting flange 23, and the connecting sleeve 2 cannot be disengaged from the guiding hole 11, realizing the connection between the connecting sleeve 2 and the puncture sleeve 1.

[0065] Preferably, two limiting flanges 23 are provided at intervals on the outer wall of the connecting sleeve 2, and a limiting gap 27 is provided between the two limiting flanges 23. The width of the limiting gap 27 in the extending direction of the guiding hole 11 matches the width of the limiting protrusion 13 in the extending direction of the guiding hole 11, and the limiting protrusion 13 can move into the limiting gap 27. When it is necessary to connect the connecting sleeve 2 and the puncture sleeve 1, align the avoidance opening 24 with the limiting protrusion 13, and the limiting protrusion 13 passes through the avoidance opening 24 of one limiting flange 23. Then rotate the connecting sleeve 2. At this time, the limiting flange 23 moves into the limiting gap 27, and the two limiting flanges 23 can stop the limiting protrusion 13. At this time, the connecting sleeve 2 cannot move relative to the guiding hole 11 in the extending direction of the guiding hole 11, improving the connection stability.

[0066] Further preferably, there are at least two limiting protrusions 13 and avoidance openings 24, and the limiting protrusions 13 and the avoidance openings 24 are in one-to-one correspondence. In this embodiment, there are two limiting protrusions 13 and two avoidance openings 24. The two limiting protrusions 13 are symmetrically arranged at the end of the guiding hole 11, and the two avoidance openings 24 are symmetrically arranged on the limiting flange 23. Through the stopping of the two limiting protrusions 13, the force is dispersed, the structural strength is improved, and the service life is prolonged.

[0067] Note that the above is only a preferred embodiment of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments. Without departing from the concept of the present application, more other equivalent embodiments can be included, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A wire piercing structure, characterized in that, Comprising: A puncture cannula (1), the puncture cannula (1) being provided with a guiding hole (11); A connecting sleeve (2), the connecting sleeve (2) being capable of extending into the guiding hole (11) and detachably connected to the puncture cannula (1), the connecting sleeve (2) being provided with a fixing hole (26); A wire (3), the wire (3) being connected to the fixing hole (26).

2. The wire piercing structure according to claim 1, characterized in that The puncture cannula (1) is provided with a first clamping portion (12), and the outer wall of the connecting sleeve (2) is provided with a second clamping portion (21), and the second clamping portion (21) is clamped to the first clamping portion (12).

3. The wire piercing structure according to claim 2, wherein The outer wall of the connecting sleeve (2) is provided with an elastic arm (22), and the elastic arm (22) is in interference contact with the inner wall of the puncture cannula (1).

4. The wire piercing structure according to claim 3, wherein A limiting post (221) is provided on a side of the elastic arm (22) away from the connecting sleeve (2), and the limiting post (221) forms the second clamping portion (21).

5. The wire piercing structure according to claim 2, characterized in that, The first clamping portion (12) is a limiting hole; or The first clamping portion (12) is a limiting groove, and the limiting groove extends along the circumferential direction of the guiding hole (11).

6. The wire piercing structure according to claim 2, characterized in that, The puncture cannula (1) is made of a transparent material.

7. The wire piercing structure according to claim 2, characterized in that, A limiting projection (13) is provided on the inner wall of one end of the guiding hole (11), and the limiting projection (13) forms the first clamping portion (12). A limiting flange (23) is provided around the outer wall of the connecting sleeve (2), and the limiting flange (23) forms the second clamping portion (21). The limiting flange (23) is provided with an avoidance opening (24) for avoiding the limiting projection (13).

8. The wire piercing structure according to claim 7, characterized in that, There are at least two of the limiting projections (13) and the avoidance openings (24), and the limiting projections (13) and the avoidance openings (24) correspond to each other one by one.

9. The wire piercing structure according to claim 7, wherein, Two of the limiting flanges (23) are provided at intervals on the outer wall of the connecting sleeve (2), and a limiting gap (27) is provided between the two limiting flanges (23). The width of the limiting gap (27) in the extending direction of the guiding hole (11) matches the width of the limiting projection (13) in the extending direction of the guiding hole (11), and the limiting projection (13) can move into the limiting gap (27).

10. The wire piercing structure according to any one of claims 1-9, characterized in that, The wire (3) is in interference connection with the fixing hole (26); or The wire (3) extends into the fixing hole (26), and a tying wire is bundled on the outer wall of the connecting sleeve (2) to fix the wire (3) in the fixing hole (26).

11. A medical tool, characterized in that, Comprising a wire puncture structure according to any one of claims 1-10.

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