CN216317828U

CN216317828U - Medical tunnel tool

Info

Publication number: CN216317828U
Application number: CN202122301307.3U
Authority: CN
Inventors: 崔贺强; 李建坤
Original assignee: Hangzhou Nuowei Medical Technology Co ltd
Current assignee: Hangzhou Nuowei Medical Technology Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-04-19
Anticipated expiration: 2031-09-22

Abstract

The utility model relates to a medical tunnel tool, which is used for constructing a subcutaneous tunnel and comprises a puncture tip; the far end of the tunnel main body is detachably connected with the puncture tip; the tunnel sleeve is sleeved on the tunnel main body; the tunnel main body is formed by connecting a linear rod and an arc rod in a head-to-tail smooth transition mode, and the arc rod is located at the far end of the tunnel main body. The utility model can ensure that a doctor can bend the tunnel main body close to the tip part to be in a shape fitting the skull without bending the tunnel main body close to the tip part or applying smaller force during operation, thereby saving more labor during penetration and preventing the scalp from being broken by careless force.

Description

Medical tunnel tool

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a medical tunnel tool.

Background

Epilepsy is a disease that seriously threatens human health. 20 to 30 percent of epileptic patients belong to intractable epilepsy. Among refractory epilepsy patients, 10-50% of patients can be treated by means of surgical resection surgery, and the cure rate is 40-90%. However, many patients are still not suitable for surgical resection (preoperative assessment fails to locate or epileptogenic focus is located in important functional area, etc.). Therefore, new effective treatment methods are urgently needed for intractable epilepsy. Deep Brain Stimulation (DBS) has a clear therapeutic effect and relative safety in the treatment of neurological diseases. As early as the 80 s, some parkinson patients began to receive thalamic DBS implants to suppress tremor symptoms. Surgical procedures implanting electrodes requires the establishment of a mechanical path between the skull and the cortex for penetration of the electrode.

The tunnel between the skull and the cortex is an arcuate tunnel against the skull, and the opening of this tunnel requires a piercing instrument with a sharp point. Tunneling tools are medical devices that have been developed specifically for electrode implantation to create mechanical tunnels. The tunnel instrument is in the use, need paste the skull under cerebral cortex, and the doctor is folding into circular-arc with it in the operation process, when wearing to the assigned position, takes out tunnel instrument pointed end and tunnel instrument main part, leaves the tunnel sleeve pipe that the tunnel instrument main part was located to the cover and is used for the electrode to penetrate.

The tip of the existing tunnel tool is generally in a triangular pyramid shape, and the main body of the tunnel tool is generally in a straight-line rod-shaped structure. When the medical doctor uses, the tunnel tool main body is slowly bent along with the penetration depth so as to be matched with the shape of the skull. However, the tunnel tool body near the tip portion of the tunnel tool is laborious and difficult to bend, and may break the scalp if being carelessly used; in addition, because tunnel sleeve pipe direct cover is located tunnel tool main part, and its mouth of pipe and the tunnel tool point end that is close to tunnel tool point end flush, when this mouth of pipe external diameter is too big, when the condition that the in-process appearance shifted that penetrates, has the risk of scratch cortex, brings unnecessary injury for the cortex.

Disclosure of Invention

The utility model aims to provide a medical tunnel tool, which aims to solve the problems that the bending of the part of the existing medical tunnel tool close to the tip is laborious and difficult, and the skin layer is easily scratched when the pipe orifice of a tunnel casing is exposed.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a medical tunneling tool for constructing a subcutaneous tunnel, comprising:

a piercing tip;

the far end of the tunnel main body is detachably connected with the puncture tip;

the tunnel sleeve is sleeved on the tunnel main body;

the tunnel main body is formed by connecting a linear rod and an arc rod in a head-to-tail smooth transition mode, and the arc rod is located at the far end of the tunnel main body.

Further, the curvature of the curved rod matches the curvature of the skull.

Further, the length of the arc-shaped rod is 30-40 mm.

Further, the protective device comprises a protective part which is arranged at the far end of the tunnel main body and is connected with the far end of the tunnel sleeve.

Furthermore, the puncture tip is provided with a cavity for accommodating the far end of the tunnel main body, the protection part comprises an annular groove formed between the inner wall of the cavity and the outer surface of the tunnel main body, and the far end of the tunnel sleeve is inserted into the annular groove.

Further, the diameter of the annular groove matches the diameter of the tunnel sleeve.

The tunnel body is provided with a near end, and the holding part is connected with the near end of the tunnel body and comprises at least two holding rings which are arranged in parallel along the direction vertical to the tunnel body.

Further, the holding part is formed by integrally bending the proximal end of the tunnel main body.

Furthermore, the puncture tip is provided with an internal thread, the far end of the tunnel main body is provided with an external thread corresponding to the internal thread, and the puncture tip and the tunnel main body are matched and locked with the external thread through the internal thread.

Further, the tunnel body is provided with a stop collar to limit movement of the tunnel sleeve relative to the tunnel body in the axial direction.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

1. according to the medical tunnel tool, the tunnel main body is formed by connecting the linear rod and the arc rod in a head-tail smooth transition mode, the arc rod is located at the far end of the tunnel main body, the curvature is matched with the curvature of a normal human skull, so that the tunnel main body can be attached to the shape of the skull when being inserted close to the tip part, a doctor can bend the tunnel main body close to the tip part to be attached to the shape of the skull without bending the tunnel main body when operating, or small force is applied to bend the tunnel main body close to the tip part to be attached to the shape of the skull, labor is saved during insertion, and the scalp is prevented from being accidentally punctured by force;

2. in the medical tunnel tool, the far end of the tunnel main body is provided with the protection part which is connected with the far end of the tunnel sleeve and used for wrapping the far end pipe orifice of the tunnel sleeve, so that the damage of the cortex caused by scratching the cortex by the far end pipe orifice in the penetrating process due to the exposure of the far end pipe orifice is prevented;

3. in the medical tunnel tool, the holding part comprises at least two holding rings which are arranged in parallel along the direction vertical to the tunnel main body, so that the holding habits of different doctors are met, the doctors can hold the holding rings better, and the holding comfort is better.

Drawings

Fig. 1 is a schematic structural diagram of a medical tunneling tool according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the medical tunneling tool A-A of FIG. 1;

FIG. 3 is an enlarged view of the medical tunneling tool K shown in FIG. 2;

FIG. 4 is a schematic view of the medical tunneling tool of FIG. 1 shown concealing a tunnel cannula;

FIG. 5 is a cross-sectional view of the medical tunneling tool B-B shown in FIG. 4;

FIG. 6 is an enlarged view of the medical tunneling tool of FIG. 5 at T;

FIG. 7 is a schematic view of a piercing tip of a medical tunneling tool according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of the piercing tip C-C shown in FIG. 7;

FIG. 9 is a side view of the medical tunneling tool of FIG. 1;

FIG. 10 is a bottom view of the medical tunneling tool of FIG. 1;

fig. 11 is an exploded view of the medical tunneling tool shown in fig. 1.

In the above drawings: 1. a piercing tip; 11. a cavity; 111. a primary cavity; 112. a secondary cavity; 2. A tunnel body; 21. a linear rod; 22. an arcuate bar; 3. a tunnel casing; 4. a protective part; 41. an annular groove; 5. a grip portion; 51. a grip ring; 511. a holding space; 6. a limit ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As used in this specification, the term "proximal" generally refers to the end of the instrument near the operator, and "distal" generally refers to the end of the instrument that enters the body first.

Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The core idea of the utility model is to provide a medical tunnel tool, which is used for puncturing along the subcutaneous part to construct a subcutaneous tunnel, so that an electrode is led out along the subcutaneous tunnel.

The tunneling tool proposed by the present invention is further described with reference to the drawings and the preferred embodiments.

Fig. 1 to 11 show a preferred embodiment of the medical tunneling tool according to the present invention. The medical tunnel tool comprises a puncture tip 1, a tunnel main body 2 and a tunnel casing 3; the distal end of the tunnel body 2 is detachably connected to the puncture tip 1. The tunnel casing 3 is detachably sleeved on the tunnel main body 2.

The tunnel main body 2 is formed by connecting a straight line rod 21 and an arc rod 22 in a head-to-tail smooth transition mode, and the arc rod 22 is located at the far end of the tunnel main body 2. The linear rod 21 is a linear solid rod-shaped structure, the arc rod 22 is an arc solid rod-shaped structure, and the diameters and the materials of the two are the same. In this embodiment, the curved rod 22 is formed by bending and extending the distal end of the linear rod 21. The camber of curved pole 22 matches the camber setting of normal human skull to can laminate the skull shape when making tunnel main part 2 be close to the tip portion and pass, can need not to buckle tunnel main part 2 and be close to the tip portion during doctor's operation, perhaps exert less power and can make tunnel main part 2 be close to the tip portion and bend to laminating skull shape, it is more laborsaving during the penetration, prevent to pass the condition of breaking the scalp carelessly hard and take place.

If the length of arc pole 22 overlength can increase the resistance of penetrating, if the length of arc pole 22 is short then be difficult to reduce the degree of difficulty of buckling, in view of this, this embodiment will the length setting of arc pole 22 is between 30-40mm, has avoided the increase of the resistance of penetrating when effectively reducing the degree of difficulty of buckling.

The tunnel main body 2 can be made of a medical metal material or a medical polymer material and has certain structural strength so as to ensure the effect of constructing the tunnel. In this embodiment, the material of the tunnel main body 2 may be medical stainless steel or other metal materials. The tunnel casing 3 should also have a certain supporting strength and a certain softness to avoid injury to a patient when a tunnel is made subcutaneously, and preferably, the tunnel casing 3 is made of a medical polymer material, such as PP (polypropylene), teflon, or the like. The outer diameter of the tunnel body 2 is slightly smaller than the inner diameter of the tunnel sleeve 3. The puncture tip 1 can be made of medical metal material or medical polymer material, such as stainless steel, PEEK, etc.

In order to make it possible to leave the tunnel casing 3 in the constructed tunnel after penetration, the puncture tip 1 and the tunnel body 2 are detachably connected by means of, but not limited to, a threaded connection, a snap connection, or a key connection, and in this embodiment, the connection between the puncture tip 1 and the tunnel body 2 is not limited. In this embodiment, the puncture tip 1 and the tunnel main body 2 are connected by a thread, specifically, the puncture tip 1 is provided with an internal thread, the distal end of the tunnel main body 2 is provided with an external thread corresponding to the internal thread, and the puncture tip 1 and the tunnel main body 2 are locked by the internal thread and the external thread.

Referring to fig. 3 to 8, a protective part 4 is disposed at the far end of the tunnel main body 2 and is used for wrapping the far end pipe orifice of the tunnel casing 3 to prevent the pipe orifice from scratching the cortex during the penetration process due to the exposure of the far end pipe orifice, so as to prevent the cortex from being damaged. In a preferred embodiment, the puncture tip 1 has a cavity 11 for receiving the distal end of the tunnel body 2, the cavity 11 is provided with an opening towards one end of the tunnel body 2, and the distal end of the tunnel body 2 extends into the cavity 11 from the opening. The cavity 11 includes a first-level cavity 111 and a second-level cavity 112 distributed in a step shape, the first-level cavity 111 is disposed near the distal end of the puncture tip 1, and the second-level cavity 112 is disposed near the proximal end of the puncture tip 1. The internal thread is arranged on the inner side wall of the primary cavity 111 and is in threaded fit and locking with the external thread at the far end of the tunnel main body 2. The diameter of the secondary cavity 112 is greater than the diameter of the primary cavity 111, and when the distal end of the tunnel main body 2 is locked with the primary cavity 111 in a matching manner, an annular groove 41 (see fig. 6) is formed between the inner wall of the secondary cavity 112 and the outer surface of the tunnel main body 2, and the annular groove 41 forms the protective part 4. When assembled, the distal end orifice of the tunnel casing 3 is inserted into the annular groove 41 (see fig. 3). The diameter of the annular groove 41 is matched with the diameter of the far end of the tunnel sleeve 3, so that when the far end of the tunnel sleeve 3 is inserted into the annular groove 41, the far end of the tunnel sleeve 3 can be attached to the annular groove 41, the annular groove 41 can wrap the far-end pipe orifice of the tunnel sleeve 3, and the damage to the cortex caused by the fact that the pipe orifice scratches the cortex in the penetrating process due to the fact that the far-end pipe orifice is exposed is prevented. The annular recess 41 should have a depth such that the distal orifice of the tunnel sleeve 3 is always located in the annular recess 41 even if the tunnel sleeve 3 is slightly moved in the axial direction relative to the tunnel body 2. In other embodiments, the protection part 4 may also be implemented as other structures that wrap the distal end nozzle of the tunnel casing 3 to prevent the distal end port from scratching the scalp, and the specific implementation manner of the protection part 4 is not limited herein.

Referring to fig. 9, in order to facilitate the operation of the doctor, the medical tunnel tool is generally provided with a holding portion 5 for the doctor to hold. The holding part 5 is connected to the near end of the tunnel main body 2. In this embodiment, the holding portion 5 includes at least two holding rings 51 arranged in parallel along a direction perpendicular to the tunnel main body 2. Specifically, the holding portion 5 is formed by connecting two holding rings 51 in parallel along a direction perpendicular to the tunnel main body 2, the two holding rings 51 are connected to form an "m" arc surface on the outer surface of the side away from the tunnel main body 2, and the outer surface of the side facing the tunnel main body 2 is connected to form a "U" arc surface. A holding space 511 for fingers to pass through is arranged in the holding ring 51. When the doctor uses, the doctor can select to hold the doctor through two cambered surfaces, or fingers pass through the holding space 511 to hook the holding ring 51 for holding, so that the holding habits of different doctors are met, the doctor can hold the doctor better, and the holding comfort is better. In other embodiments, the number of the grip rings 51 may also be three, four or more, and the number of the grip rings 51 is not limited herein.

The connection mode of the holding part 5 and the tunnel main body 2 can adopt non-detachable fixed connection or detachable fixed connection. When the connection mode is a non-detachable fixed connection, the connection mode includes, but is not limited to, welding, integral molding, or glue bonding, etc. When the connection mode is a detachable fixed connection, the connection mode includes, but is not limited to, a snap connection, a threaded connection, a key connection, or the like. Preferably, the grip portion 5 is integrally formed with the tunnel body 2. In this embodiment, the holding portion 5 is formed by integrally bending the proximal end of the tunnel main body 2, so that the structure is simpler, the manufacture is more convenient, and the connection strength is better.

The medical tunnel tool is further provided with a limiting ring 6, and the limiting ring 6 can be integrally formed with the tunnel main body 2 and can also be sleeved on the tunnel main body 2. In this embodiment, the limit ring 6 is a circular cylindrical structure sleeved outside the tunnel main body 2, and the limit ring 6 is disposed at a proper position of the tunnel main body 2, so that when the tunnel casing 3 is sleeved on the tunnel main body 2, the near end of the tunnel casing 3 is abutted against the limit ring 6, so that the tunnel casing 3 is axially limited to move towards the near end relative to the tunnel main body 2, thereby preventing the tunnel casing 3 from falling off, and ensuring the accuracy of the position of the tunnel casing 3.

In conclusion, in the medical tunnel tool, the tunnel main body is formed by connecting the straight line-shaped rod and the arc-shaped rod in a head-to-tail smooth transition mode, the arc-shaped rod is positioned at the far end of the tunnel main body, the curvature is matched with the curvature of the skull of a normal human body, so that the tunnel main body can be attached to the shape of the skull when being inserted close to the tip part, a doctor can bend the tunnel main body close to the tip part to be attached to the shape of the skull without bending the tunnel main body when operating, or a small force is applied to bend the tunnel main body close to the tip part to be attached to the shape of the skull, the force is saved during insertion, and the scalp is prevented from being accidentally punctured by force; the far end of the tunnel main body is provided with a protection part which is connected with the far end of the tunnel sleeve and used for wrapping the far end pipe orifice of the tunnel sleeve, so that the damage of the cortex caused by the scratch of the far end pipe orifice in the penetrating process due to the exposure of the far end pipe orifice is prevented; the portion of gripping includes along the at least two rings that grip that set up side by side of perpendicular to tunnel main part direction to satisfy different doctors' habit of gripping, so that the doctor better grips, and the travelling comfort of gripping is better.

It should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art will be able to make the description as a whole, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The above detailed description is merely illustrative of possible embodiments of the present invention and is not intended to limit the scope of the utility model, which is intended to include all equivalent embodiments or modifications within the scope of the present invention without departing from the technical spirit of the present invention.

Claims

1. A medical tunneling tool for constructing a subcutaneous tunnel, comprising:

a piercing tip (1);

the far end of the tunnel main body (2) is detachably connected with the puncture tip (1);

the tunnel casing (3) is sleeved on the tunnel main body (2);

the tunnel main body (2) is formed by connecting a linear rod (21) and an arc rod (22) in a head-to-tail smooth transition mode, and the arc rod (22) is located at the far end of the tunnel main body (2).

2. The medical tunneling tool according to claim 1, wherein the curvature of the curved rod (22) matches the curvature of the skull.

3. The medical tunneling tool according to claim 1, wherein the arcuate rod (22) has a length of 30-40 mm.

4. The medical tunneling tool according to claim 1, characterized by comprising a shield (4) disposed at the distal end of the tunnel body (2) and connected to the distal end of the tunnel sleeve (3).

5. The medical tunneling tool according to claim 4, wherein the puncture tip (1) has a cavity (11) for receiving the distal end of the tunnel body (2), the shield (4) includes an annular groove (41) formed between the inner wall of the cavity (11) and the outer surface of the tunnel body (2), and the distal end of the tunnel cannula (3) is inserted into the annular groove (41).

6. The medical tunneling tool according to claim 5, wherein the annular groove (41) has a diameter matching the diameter of the tunnel sleeve (3).

7. The medical tunneling tool according to claim 1, characterized by comprising a grip (5) attached to the proximal end of the tunnel body (2), the grip (5) comprising at least two grip rings (51) juxtaposed in a direction perpendicular to the tunnel body (2).

8. The medical tunneling tool according to claim 7, wherein the grip (5) is integrally formed by bending a proximal end of the tunnel body (2).

9. The medical tunneling tool according to claim 1, wherein the tunnel body (2) is provided with a stop collar (6) to limit movement of the tunnel sleeve (3) in an axial direction with respect to the tunnel body (2).

10. The medical tunneling tool according to claim 1, wherein the puncture tip (1) is provided with an internal thread, the distal end of the tunnel body (2) is provided with an external thread corresponding to the internal thread, and the puncture tip (1) and the tunnel body (2) are locked by the internal thread and the external thread.