NEEDLE TUBE STRUCTURE AND ENDOSCOPIC INTERVENTION INSTRUMENT

Abstract

A needle tube structure, characterized in that it comprises: a needle tube body (100) and a polymeric tube body (200) disposed within the needle tube body (100), wherein a side wall of the needle tube body (100) is provided with at least one groove (101), and wherein the polymeric tube body (200) is fixedly attached to the needle tube body (100).

Description

NEEDLE TUBE STRUCTURE AND INTERVENTION INSTRUMENT ENDOSCOPIC The present description relates to the technical field of endoscopic medical instruments, and particularly to a needle tube structure and an endoscopic intervention instrument. Background of the invention According to the current state of the art, the endoscopic interventional instrument provides a passage for the insertion of a guide wire. The guide wire must be moved back and forth along the needle tube of the endoscopic interventional instrument to position its distal end at the target location. Since the leading end of the needle tube must be equipped with a needle-tip blade configured to cut or pierce, when the needle tube slides along the guide wire, the needle-tip blade will cut or scrape the guide wire, easily stripping its surface layer and even causing serious damage. Furthermore, a cushioning layer is inserted on the inner side of the needle-tip blade to separate the guide wire from the needle tube, thus preventing the needle-tip blade from scraping the surface layer of the guide wire.However, in medical applications, the cushioning layer on the inner side of the needle-tip blade has a high risk of detachment, which can lead to medical accidents caused by the cushioning layer remaining inside the human body. Description of the invention The objective of the present invention is to provide a needle tube structure and an endoscopic intervention instrument to solve the technical problems of the prior art needle tube structure that easily scrapes the surface layer of the guide wire and the tube body of polymeric material that is prone to peeling off. In a first aspect, the present invention provides a needle tube structure, comprising a needle tube body and a polymeric material tube body provided within the needle tube body, wherein a side wall of the needle tube body is provided with at least one groove, and the polymeric material tube body is fixedly fitted to the groove. With regard to the first aspect, the present invention provides a first possible embodiment of the first aspect, wherein the polymeric material tube body is inserted into the needle tube body, and the polymeric material tube body is fixed to the needle tube body by means of an adhesive material injected from the groove. With regard to the first aspect, the present invention provides a second possible embodiment of the first aspect, wherein the needle tube body and the polymeric material tube body are formed by a co-injection molding process to join the needle tube body and the polymeric material tube body. With regard to the first aspect, the present description provides a third possible embodiment of the first aspect, wherein on the inner side wall of the needle tube body, the polymeric material tube body is formed by spraying to allow the polymeric material tube body to bond and be fixed to the inner side wall of the needle tube body. With regard to the first aspect, the present description provides a fourth possible embodiment of the first aspect, the needle tube body and the polymer material tube body are integrally molded by a hot melt process. With regard to the first aspect, the present description provides a fifth possible embodiment of the first aspect, the tube body of polymeric material forms a protruding portion fitted to the groove. With regard to the first aspect, the present description provides a sixth possible embodiment of the first aspect, one end of the needle tube body is provided with a needle point blade, and the tube body of polymeric material is provided with an incision portion covering an inner side of the needle point blade. With regard to the first aspect, the present description provides a seventh possible embodiment of the first aspect, the needle-tip blade and the incising portion are aligned along a blade surface, and the blade surface is arranged obliquely with respect to an axis of the needle-tube body; and an inner edge of the incising portion near the axis of the needle-tube body is exposed from the blade surface. In a second aspect, an endoscopic intervention instrument is provided in the present description, which includes: a guide wire and the needle tube structure as described in the first aspect, wherein the guide wire passes through the needle tube structure, allowing the guide wire to slide along the needle tube structure. Regarding the second aspect, the needle tube body is inserted into an outer tube in a sliding manner. Implementing the described design offers the following benefits. A polymer tube body is arranged inside the needle tube body, and one side wall of the needle tube body is provided with at least one groove. The polymer tube body is securely fitted into this groove. This ensures that the polymer tube body is firmly attached to the needle tube body, preventing a guide wire passing through the needle tube body from being scratched or damaged. It also improves the stability of the polymer tube body, thereby reducing the risk of it detaching. In order to make the objective, features, and advantages of the above description more obvious and easier to understand, the following is a better example, and with the attached drawings, for a detailed description as follows. Brief description of the figures To more clearly illustrate the technical solutions in the specific embodiments of this description or related technologies, a brief introduction to the drawings required for the description of these specific embodiments or related technologies is provided below. Obviously, the drawings described below are some embodiments of this description; however, those skilled in the art can easily obtain other drawings based on these without making an inventive effort. FIG.1 is a partial schematic diagram of a needle tube structure and an outer tube of an endoscopic intervention instrument provided in the making of the present description; FIG.2 is an enlarged schematic diagram of position A in FIG.1; FIG.3 is a partial schematic diagram of another needle tube structure and an outer tube of an endoscopic intervention instrument provided in the making of the present description; FIG.4 is an enlarged schematic diagram of position B in FIG.3; and FIG. 5 is a partially enlarged schematic diagram of a needle tube body of an endoscopic interventional instrument provided in the making of the present description. Reference numbers: 10.- needle tube body; 10.- groove; 10.- needle tip blade; 20.- polymer material tube body; 201.- protruding portion; 202.- incision portion; 20.- inner rim; 30.- outer tube; Description of a preferred embodiment A clear and complete description of the technical solutions in this description, in conjunction with the drawings, will be provided below. Obviously, the embodiments described are only a portion of the possible embodiments of this description and do not represent all possible embodiments. Based on the embodiments detailed in this description, any other possible embodiments obtained by those with ordinary skill in the art without inventive effort are within the scope of protection of this invention. In the description of the present invention, it should be noted that the terms "center," "top," "bottom," "left," "right," "vertical," "horizontal," "interior," "exterior," and other positional or directional indications are based on the orientations or positional relationships shown in the drawings. They are provided solely to facilitate and simplify the description hereof and should not be construed as indicating or implying that the devices or components referred to must have a specific orientation, be configured, or operate in a specific orientation. Therefore, they should not be interpreted as limitations of the present description. Furthermore, the terms "first," "second," and "third" are used only to distinguish terms and should not be interpreted as indicating or implying any relative importance.Unless otherwise specified, physical quantities in formulas should be understood as either fundamental quantities in the International System of Units (SI) or as derived quantities obtained through mathematical operations such as multiplication, division, differentiation, or integration based on fundamental quantities. In the description of the present invention, it is important to note that unless clearly stipulated and limited otherwise, the terms "assemble," "interconnect," and "connect" should be understood in a broad sense. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection through an intermediate means, or internal communication between two components. Those skilled in the art may understand the meanings of the foregoing terms in the present description according to specific situations. As shown in FIGS. 1, 3 and 5, the needle tube structure provided herein includes a needle tube body (100) and a polymeric material tube body (200) provided within the needle tube body (100). The side wall of the needle tube body (100) is provided with at least one groove (101), and the polymeric material tube body (200) is fixedly fitted to the groove (101). In this embodiment, the polymer 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) along the axial direction, and the polymer tube body (200) is positioned between the guide wire and the needle tube body (100) to prevent the needle tube body (100) from scratching the surface layer of the guide wire. Furthermore, the side wall of the needle tube body (100) is provided with at least one groove (101), and the polymer tube body (200) can be fitted into the groove (101).Reinforcing material can be added through the groove (101) to improve the strength of the bond between the polymeric material tube body (200) and the needle tube body (100), thereby improving the stability of the polymeric material tube body (200) and reducing the risk of detachment of the polymeric material tube body (200), which can lead to medical accidents. As shown in FIG. 1 and FIG. 2, in an optional first embodiment, the polymeric tube body (200) is inserted into the needle tube body (100), and the polymeric tube body (200) is fixed to the needle tube body (100) by means of an adhesive material injected from the groove (101). The adhesive solution can penetrate the space between the outer wall of the polymeric tube body (200) and the inner wall of the needle tube body (100) through the groove (101), thus ensuring a stable bond between the polymeric tube body (200) and the needle tube body (100). As shown in FIG. 3 and FIG. 4, in a second optional embodiment, the needle tube body (100) and the polymer tube body (200) are integrally molded via a co-injection molding process, so that the needle tube body (100) and the polymer tube body (200) are joined together. This allows for the simultaneous molding of the needle tube body (100) and the polymer tube body (200) while ensuring a secure bond between them, thereby improving process efficiency. In a third optional embodiment, on the inner side wall of the needle tube body (100), the polymeric tube body (200) is formed by spraying to allow the polymeric tube body (200) to bond and be fixed to the inner side wall of the needle tube body (100). This procedure also allows for rapid processing and molding. In a fourth optional embodiment, the needle tube body (100) and the polymer material tube body (200) are integrally molded through a hot melt process, further improving production efficiency and ensuring a more stable bond between the needle tube body (100) and the polymer material tube body (200) after solidification. With reference to FIG. 2 and FIG. 5, according to the above optional embodiments, the polymeric tube body (200) can form a protruding portion (201) that fits into the groove (101). By embedding the protruding portion (201) in the groove (101), the stability of the polymeric tube body (200) with respect to the needle tube body (100) is improved, thereby reducing the risk of detachment of the polymeric tube body (200). As shown in FIG. 2 and FIG. 4, the end of the needle tube body (100) is provided with a needle tip blade (102), which can cut and pierce the target human tissue. The polymeric tube body (200) includes an incision portion (202) that covers the inner side of the needle tip blade (102). The incision portion (202) can separate the guide wire passing through the needle tube body (100) from the needle tip blade (102), thus preventing damage to the surface layer of the guide wire. Furthermore, the needle-point blade (102) and the incision portion (202) are flush along a blade surface, and the blade surface is arranged obliquely with respect to an axis of the needle-tube body (100); and an inner edge (203) of the incision portion (202) near the axis of the needle-tube body (100) is exposed from the blade surface. The blade surface includes a flat or arc-shaped surface that is inclined with respect 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 be in contact with the guide wire, thereby preventing the guide wire from coming into contact with the inner edge of the needle-point blade (102). This prevents a guide wire that bends about the axis of the needle tube body (100) from being scraped by the needle tip foil (102). As shown in FIG. 1, an endoscopic intervention instrument is provided herein, comprising a guide wire and the needle tube structure as described in the embodiments, where the guide wire passes through the needle tube structure, allowing it to slide along the structure. The needle tube body (100) can be implanted distally, away from the operating end, thereby achieving a puncture of the target human tissue. Subsequently, the guide wire is inserted along the needle tube body (100). During this process, a polymeric tube body (200) is positioned between the guide wire and the needle tube body (100), preventing wear between the guide wire and the needle tube body (100) and also avoiding abrasion damage to the surface layer of the guide wire caused by the needle tube body (100).Furthermore, the polymer material tube body (200) is firmly attached to the needle tube body (100), thus reducing the risk of detachment of the polymer material tube body (200) which may lead to medical accidents. In the execution of the present description, the needle tube body (100) is slidably inserted into an outer tube (300), and the outer tube (300) is inserted into an endoscope. The endoscope allows visual operation of the needle tube body (100). The needle tube body (100) is telescopically moved relative to the outer tube (300). The outer tube (300) is used to preliminarily implant the needle tube body (100) at a specific location, after which the needle tube body (100) is extended outward relative to the outer tube (300) to achieve puncture of the target human tissue. The guide wire is then inserted along the length of the needle tube body (100), during which the polymeric tube body (200) prevents the needle tube body (100) from scraping the guide wire. Finally, it should be noted that prior embodiments are used only to illustrate the technical solution of the present invention described herein, not to limit it, and the present invention has been described in detail with reference to prior embodiments. Those skilled in the art will understand that the technical solution described in prior embodiments may still be modified or some or all of its technical features replaced; such modifications or substitutions do not detract from the essence of the corresponding technical solution within the scope of the technical solution of the embodiments of the present invention.

Claims

1. A needle tube structure, characterized in that it comprises: a needle tube body (100) and a polymeric tube body (200) disposed within the needle tube body (100), wherein a side wall of the needle tube body (100) is provided with at least one groove (101), and wherein the polymeric tube body (200) is fixedly attached to the needle tube body (100).

2. A needle tube structure according to claim 1, wherein the polymeric tube body (200) is inserted within the needle tube body (100), and the polymeric tube body (200) is fixed to the needle tube body (100) by means of an adhesive material.

3. Needle tube structure, according to any of claim 1 or 2, wherein the polymeric tube body (200) forms a protruding portion (201) fitted into the groove (101). 4.A needle tube structure according to claim 1, wherein one end of the needle tube body (100) is provided with a needle point blade (102), and the polymeric tube body (200) is provided with a slit portion (202) covering an inner side of the needle point blade (102).

5. A needle tube structure according to claim 4, wherein the needle point blade (102) and the slit portion (202) are flush along a sheet surface, and the sheet surface is arranged obliquely with respect to an axis of the needle tube body (100); and an inner edge (203) of the slit portion (202) near the axis of the needle tube body (100) is exposed from the sheet surface. 6.An endoscopic interventional instrument, characterized in that it comprises: a guide wire and a needle tube structure according to any one of claims 1 to 5, wherein the guide wire passes through the needle tube structure, allowing the guide wire to slide along the needle tube structure.

7. An endoscopic interventional instrument according to claim 6, wherein the needle tube body (100) is slidably inserted into an outer tube (300) and the outer tube (300) is inserted into an endoscope.