Needle tube structure and endoscope interventional instrument

Abstract

The utility model provides a needle tube structure and an endoscope interventional instrument, and relates to the technical field of endoscope medical instruments, the needle tube structure provided by the utility model comprises a needle tube body and a high polymer material tube body arranged in the needle tube body; at least one groove hole is formed in the side wall of the needle tube body, and the high polymer material tube body is fixed in the groove hole in a matched mode. According to the needle tube structure and the endoscope interventional instrument, it can be ensured that the high polymer material tube body is stably connected relative to the needle tube body, a guide wire penetrating through the needle tube body can be prevented from being scratched and damaged by the needle tube body, the stability of the high polymer material tube body is enhanced, and the risk that the high polymer material tube body falls off is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopic medical instruments, in particular to a needle tube structure and an endoscopic interventional instrument. Background Art

[0002] Endoscopic interventional instruments establish a channel for inserting a guide wire, and the guide wire needs to slide back and forth along the needle tube of the endoscopic interventional instrument so that the distal end of the guide wire can be inserted into the target position. Since a needle tip blade for cutting or puncturing needs to be provided at the front end of the needle tube, the needle tip blade will cut and scrape the guide wire when the needle tube slides along the guide wire, which can easily scrape off the epidermis of the guide wire and even cause serious damage to the guide wire. In addition, a cushion layer is embedded on the inner side of the needle tip blade to separate the guide wire and the needle tube, thereby preventing the needle tip blade of the needle tube from scraping the epidermis of the guide wire. However, during medical use, the cushion layer on the inner side of the needle tip blade has a greater risk of falling off, which can easily lead to medical accidents in which the cushion layer material is left in the human body. Utility Model Content

[0003] The utility model aims to provide a needle tube structure and an endoscopic interventional instrument to solve the technical problems that the needle tube structure is easy to scratch the surface of the guide wire and the polymer material tube body is easy to fall off.

[0004] In a first aspect, the needle tube structure provided by the utility model comprises: a needle tube body and a polymer material tube body arranged inside the needle tube body;

[0005] The side wall of the needle tube body is provided with at least one slot hole, and the polymer material tube body is matched and fixed in the slot hole.

[0006] In combination with the first aspect, the utility model provides a first possible implementation of the first aspect, wherein the polymer material tube body is inserted into the needle tube body, and the polymer material tube body is fixed relative to the needle tube body by rubber injected from the slot.

[0007] In combination with the first aspect, the utility model provides a second possible implementation of the first aspect, wherein the needle tube body and the polymer material tube body are formed by a co-injection process to enable the needle tube body to be joined with the polymer material tube body.

[0008] In combination with the first aspect, the utility model provides a third possible implementation of the first aspect, wherein the inner wall of the needle tube body is formed by spraying the polymer material tube body so that the polymer material tube body is joined and attached to the inner wall of the needle tube body.

[0009] In combination with the first aspect, the utility model provides a fourth possible implementation of the first aspect, wherein the needle tube body and the polymer material tube body are integrally formed by hot melting.

[0010] In combination with the first aspect, the utility model provides a fifth possible implementation of the first aspect, wherein the polymer material tube body forms a protrusion that fits into the slot.

[0011] In combination with the first aspect, the utility model provides a sixth possible implementation of the first aspect, wherein a needle tip blade is provided at the end of the needle tube body, and the polymer material tube body has a cutout portion covering the inner side of the needle tip blade.

[0012] In combination with the sixth possible implementation of the first aspect, the utility model provides a seventh possible implementation of the first aspect, wherein the needle tip blade is flush with the incision portion along the blade surface, and the blade surface is inclined relative to the axis of the needle tube body;

[0013] The inner edge of the cutout portion close to the axis of the needle tube body is exposed from the blade surface.

[0014] In a second aspect, the endoscopic interventional instrument provided by the utility model comprises: a guide wire and the needle tube structure described in the first aspect, wherein the guide wire passes through the needle tube structure and is able to slide along the needle tube structure.

[0015] In combination with the second aspect, the needle tube body is slidably inserted in the outer tube.

[0016] The embodiments of the utility model bring about the following beneficial effects: a polymer material tube body is arranged inside the needle tube body, and at least one slot hole is provided on the side wall of the needle tube body, and the polymer material tube body is fixed to the slot hole through cooperation, thereby ensuring that the polymer material tube body is firmly engaged with the needle tube body, which not only prevents the guide wire passing through the needle tube body from being scratched and damaged by the needle tube body, but also enhances the stability of the polymer material tube body and reduces the risk of the polymer material tube body falling off.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A partial schematic diagram of a first needle tube structure and an outer tube of an endoscopic interventional instrument provided in an embodiment of the utility model;

[0020] Figure 2 for Figure 1 A magnified schematic diagram of position A in the middle;

[0021] Figure 3 A partial schematic diagram of a second needle tube structure and an outer tube of an endoscopic interventional instrument provided in an embodiment of the utility model;

[0022] Figure 4 for Figure 3 A magnified schematic diagram of position B in the middle;

[0023] Figure 5 A partially enlarged schematic diagram of the needle tube body of the endoscopic interventional instrument provided in an embodiment of the utility model.

[0024] Icons: 100 - needle tube body; 101 - slot; 102 - needle tip blade; 200 - polymer material tube body; 201 - raised part; 202 - cutout part; 203 - inner edge; 300 - outer tube. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, 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 therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are only used to describe the difference in names, and cannot be understood as indicating or implying relative importance. The physical quantities in the formula, if not separately marked, should be understood as basic quantities of the basic units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figure 1 , Figure 3 and Figure 5 As shown, the needle tube structure provided by the embodiment of the utility model includes: a needle tube body 100 and a polymer material tube body 200 arranged inside the needle tube body 100; the side wall of the needle tube body 100 is provided with at least one slot hole 101, and the polymer material tube body 200 is fixed in the slot hole 101.

[0029] In this embodiment, the polymer material tube body 200 is made of materials such as fiber, resin, plastic and rubber that are harmless to the human body. When the needle tube structure is in use, the guide wire passes through the needle tube body 100 axially, and the polymer material tube body 200 is separated between the guide wire and the needle tube body 100, thereby preventing the needle tube body 100 from scratching the epidermis of the guide wire. In addition, the side wall of the needle tube body 100 is provided with at least one slot hole 101, and the polymer material tube body 200 can be matched with the slot hole 101. Reinforcement materials can be added through the slot hole 101 to improve the bonding strength between the polymer material tube body 200 and the needle tube body 100, thereby enhancing the stability of the polymer material tube body 200 and reducing the risk of medical accidents caused by the falling off of the polymer material tube body 200.

[0030] like Figure 1 and Figure 2 As shown, in the first optional embodiment, the polymer material tube body 200 is inserted into the needle tube body 100, and the polymer material tube body 200 is fixed relative to the needle tube body 100 by the glue injected from the slot 101. The glue can penetrate into the gap between the outer wall of the polymer material tube body 200 and the inner wall of the needle tube body 100 through the slot 101, so that the polymer material tube body 200 and the needle tube body 100 can be firmly bonded.

[0031] like Figure 3 and Figure 4 As shown, in the second optional embodiment, the needle tube body 100 and the polymer material tube body 200 are processed and formed by a co-injection process to enable the needle tube body 100 to be joined with the polymer material tube body 200. In this way, the needle tube body 100 and the polymer material tube body 200 can be formed simultaneously and the two can be firmly joined, and the processing efficiency is high.

[0032] In a third optional embodiment, the inner wall of the needle tube body 100 is solidified by spraying to form a polymer material tube body 200, so that the polymer material tube body 200 is joined and attached to the inner wall of the needle tube body 100, thereby also realizing processing and forming faster.

[0033] In a fourth optional embodiment, the needle tube body 100 and the polymer material tube body 200 are integrally formed by hot-melt molding, which has higher production efficiency. After curing, the needle tube body 100 and the polymer material tube body 200 are more firmly joined.

[0034] See also Figure 2 and Figure 5 On the basis of the above optional implementation manner, the polymer material tube body 200 can form a protrusion 201 that matches the slot hole 101. By embedding the protrusion 201 into the slot hole 101, the stability of the polymer material tube body 200 relative to the needle tube body 100 can be improved, and the risk of the polymer material tube body 200 falling off can be reduced.

[0035] like Figure 2 and Figure 4 As shown, a needle tip blade 102 is provided at the end of the needle tube body 100, through which the human tissue at the target location can be cut and pierced. The polymer material tube body 200 has a cutting portion 202 covering the inner side of the needle tip blade 102. The cutting portion 202 can separate the guide wire passing through the needle tube body 100 from the needle tip blade 102, thereby preventing the guide wire epidermis from being scratched.

[0036] Furthermore, the needle tip blade 102 is flush with the cutout portion 202 along the blade surface, and the blade surface is inclined relative to the axis of the needle tube body 100; the inner edge 203 of the cutout portion 202 close to the axis of the needle tube body 100 is exposed from the blade surface. The blade surface includes a plane or arc surface inclined relative to the axis of the needle tube body 100, and the inner edge 203 is exposed from the blade surface. In other words, the inner edge 203 can contact the guide wire, thereby preventing the guide wire from contacting the inner edge of the needle tip blade 102, thereby preventing the guide wire bent relative to the axis of the needle tube body 100 from being scratched by the needle tip blade 102.

[0037] like Figure 1As shown, the endoscopic interventional instrument provided by the embodiment of the utility model includes: a guide wire and the needle tube structure described in the above-mentioned embodiment, the guide wire passes through the needle tube structure, and the guide wire can slide along the needle tube structure. The needle tube body 100 can be implanted at the far end away from the operating end, so as to achieve puncture of the human tissue at the target, and then the guide wire is inserted along the needle tube body 100. During the process, the polymer material tube body 200 is separated between the guide wire and the needle tube body 100, which can not only avoid relative wear between the guide wire and the needle tube body 100, but also avoid the needle tube body 100 from causing scraping damage to the guide wire epidermis. In addition, the polymer material tube body 200 is firmly connected to the needle tube body 100, which reduces the risk of medical accidents caused by the falling off of the polymer material tube body 200.

[0038] In an embodiment of the utility model, the needle tube body 100 is slidably inserted in the outer tube 300, and the outer tube 300 is inserted into an endoscope. The visual operation of the needle tube body 100 is achieved through the endoscope. The needle tube body 100 can telescope relative to the outer tube 300. The needle tube body 100 can be initially implanted into a specific position through the outer tube 300. Then, the needle tube body 100 is extended relative to the outer tube 300 to puncture the target human tissue, and then a guide wire is inserted along the needle tube body 100. During the process, the polymer material tube body 200 is used to prevent the needle tube body 100 from scratching the guide wire.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A needle tube structure, characterized in that: include: A needle tube body (100) and a polymer material tube body (200) arranged inside the needle tube body (100); The side wall of the needle tube body (100) is provided with at least one slot hole (101), and the polymer material tube body (200) is matched and fixed in the slot hole (101).

2. The needle tube structure according to claim 1, characterized in that: The polymer material tube body (200) is inserted into the needle tube body (100), and the polymer material tube body (200) is fixed relative to the needle tube body (100) by the rubber injected from the slot hole (101).

3. The needle tube structure according to claim 1, characterized in that: The needle tube body (100) and the polymer material tube body (200) are processed and formed by a co-injection process so that the needle tube body (100) and the polymer material tube body (200) are joined.

4. The needle tube structure according to claim 1, characterized in that: The inner side wall of the needle tube body (100) is formed with the polymer material tube body (200) by spraying, so that the polymer material tube body (200) is joined to and attached to the inner side wall of the needle tube body (100).

5. The needle tube structure according to claim 1, characterized in that: The needle tube body (100) and the polymer material tube body (200) are integrally formed by hot-melt method.

6. The needle tube structure according to any one of claims 1 to 5, characterized in that: The polymer material tube body (200) forms a protruding portion (201) that fits into the slot hole (101).

7. The needle tube structure according to claim 1, characterized in that: The end of the needle tube body (100) is provided with a needle tip blade (102), and the polymer material tube body (200) has a cutout portion (202) covering the inner side of the needle tip blade (102).

8. The needle tube structure according to claim 7, characterized in that: The needle tip blade (102) is flush with the cutout portion (202) along the blade surface, and the blade surface is arranged obliquely relative to the axis of the needle tube body (100); The inner edge (203) of the cutout portion (202) close to the axis of the needle tube body (100) is exposed from the blade surface.

9. An endoscopic interventional instrument, characterized in that: include: A guide wire and a needle tube structure as described in any one of claims 1 to 8, wherein the guide wire passes through the needle tube structure and is able to slide along the needle tube structure.

10. The endoscopic interventional instrument according to claim 9, characterized in that: The needle tube body (100) is slidably inserted into the outer tube (300).

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