Needle tube construction and endoscopic interventional instrument

Abstract

A needle tube construction, characterized in that it comprises: a needle tube body (100) and a polymeric material tube body (200) disposed inside the needle tube body (100); the needle tube body (100) has at least one slotted hole (101) on the side wall, and the polymeric material tube body (200) is cooperatively secured to the slotted hole (101).

Description

Technical field

[0001] The utility model relates to the technical field of endoscopic medical devices, in particular to a needle tube construction and an endoscopic interventional instrument. Technical background

[0002] The endoscopic interventional instrument forms a channel for guidewire implantation, which must be reciprocated along the needle tube of the endoscopic interventional instrument to implant the distal end of the guidewire into the target position. Since the tip of the needle tube must be equipped with a blade for cutting or piercing, the blade of the needle tip will cut and scrape the guidewire when the needle tube slides along the guidewire, which can easily abrade the skin of the guidewire and even cause serious damage to the guidewire. In addition, a backing layer is embedded inside the blade of the needle tip to separate the guidewire and the needle tube, thus preventing the blade of the needle tube from scratching the skin of the guidewire.However, in the course of medical treatment, there is a high risk that the backing layer located on the inside of the blade of the needle tip will fall off, which may lead to medical accidents in which the backing layer material remains in the human body. Subject of the present utility model

[0003] The purpose of the utility model is to provide a needle tube structure and an endoscopic interventional instrument to solve the technical problems that the needle tube structure can easily scrape the skin of the guide wire and that the tube body made of polymer material is easy to fall off.

[0004] In a first aspect, the utility model provides a needle tube construction comprising: a needle tube body and a tube body made of polymer material disposed inside the needle tube body; the needle tube body has at least one slotted hole on the side wall, and the polymeric material tube body is cooperatively secured to the slotted hole.

[0005] In connection with the first aspect, the utility model provides a first possible embodiment of the first aspect, in which the tube body made of polymer material is inserted into the needle tube body and the tube body made of polymer material is fixed with respect to the needle tube body by an adhesive material injected from the slotted hole.

[0006] In connection with the first aspect, the utility model provides a second possible embodiment of the first aspect in which the needle tube body is machined and formed by a co-injection process to connect the needle tube body to the tube body made of polymer material.

[0007] In connection with the first aspect, the utility model provides a third possible embodiment of the first aspect, in which the inner side wall of the needle tube body is formed by spraying the tube body of polymer material, so that the tube body of polymer material is connected to and adheres to the inner side wall of the needle tube body.

[0008] In connection with the first aspect, the utility model provides a fourth possible embodiment of the first aspect, in which the needle tube body is integrally formed with the tube body of polymer material by heat fusion.

[0009] In connection with the first aspect, the utility model provides a fifth possible embodiment of the first aspect, in which the tube body is formed of polymer material with a projection that fits into the slotted hole.

[0010] In connection with the first aspect, the utility model provides a sixth possible embodiment of the first aspect, in which a needle tip blade is arranged at the end of the needle tube body and the tube body of polymer material has a cut covering the inside of the needle tip blade.

[0011] In combination with a sixth possible embodiment of the first aspect, the utility model provides a seventh possible embodiment of the first aspect, in which the needle tip blade is flush with the notch along a blade surface, the blade surface being inclined with respect to an axis of the needle tube body; the inner edge of the incision near the axis of the needle tube body is exposed from the blade surface.

[0012] In a second aspect, the present utility model provides an endoscopic interventional instrument comprising: a guide wire and a needle tube construction as documented in the first aspect, wherein the guide wire extends through the needle tube construction such that the guide wire is slidable along the needle tube construction.

[0013] In connection with the second aspect, the needle tube body is slidably inserted into the outer tube.

[0014] The embodiments of the present utility model bring about the following advantageous effects: the tube body made of polymer material is provided inside the needle tube body, and the side wall of the needle tube body has at least one slit hole, by cooperatively fixing the tube body made of polymer material with the slit hole, it is ensured that the tube body made of polymer material is fixed in the needle tube body to ensure that the tube body made of polymer material is firmly connected to the needle tube body, thereby not only preventing the needle tube body from damaging and scratching the guide wire passing through the needle tube body, but also increasing the stability of the tube body made of polymer material and reducing the risk of the tube body falling off.

[0015] In order to make the above-mentioned purposes, features and advantages of the present utility model more clear and easier to understand, the following preferred embodiments with the accompanying drawings are described in detail as follows. Description of the drawings

[0016] To better illustrate specific embodiments of the present utility model and the technical solutions in the prior art, the drawings required to describe the specific embodiments and the prior art are briefly presented below. Naturally, the drawings in the following description represent some of the embodiments of the present application, and based on these drawings, a person skilled in the art can obtain further drawings without any creative effort. Fig. shows a schematic partial view of a first needle tube construction and an outer tube of an endoscopic interventional instrument according to an embodiment of the utility model; Fig. shows an enlarged schematic view of position A in Fig. ; Fig. shows a schematic partial view of a second needle tube construction and an outer tube of an endoscopic interventional instrument according to an embodiment of the utility model; Fig. shows an enlarged schematic view of position B in Fig. ; Fig. shows an enlarged schematic partial view of a needle tube body of an endoscopic interventional instrument according to an embodiment of the utility model.

[0017] Reference numerals: 100 - needle tube body; 101 - slotted hole; 102 - needle tip blade; 200 - polymer tube body; 201 - projection; 202 - notch; 203 - inner edge; 300 - outer tube. Detailed description of embodiments

[0018] The technical solutions of the present utility model are described clearly and completely below in conjunction with the accompanying drawings. It is obvious that the described embodiments represent a portion of the embodiments of the present utility model and not all of them. Starting from the embodiments of the present utility model, all other embodiments that a person skilled in the art can produce without creative effort also fall within the scope of protection of the present utility model.

[0019] In the description of the present application, it should be noted that terms such as "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inside," "outside," and the like refer to the orientations or positional relationships shown in the accompanying drawings and are used merely to facilitate and simplify the description of the present application. They do not indicate or imply that this device or element must have a particular orientation or be constructed and operated in a particular orientation and are therefore not to be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used only to describe differences in designations and are not to be construed as indicating or implying relative importance.Physical quantities in the formulas, unless individually identified, are to be understood as base quantities in the base units of the International System of Units or as quantities derived from the base quantities by mathematical operations such as multiplication, division, differentiation or integration.

[0020] In the description of the utility model, it should be noted that the terms "assembled," "connected," and "attached" are to be understood in a broad sense, unless expressly stated and limited otherwise. It may be a fixed connection, a detachable connection, or a one-piece connection; it may be a mechanical connection or an electrical connection; it may be a direct connection, an indirect connection via an intermediate medium, or a connection within two elements. The specific meaning of the above terms in the context of the present utility model will be understandable to a person skilled in the art in each individual case.

[0021] As in the Fig. 1, Fig. 3 and Fig. 5, one embodiment of the utility model provides a needle tube construction comprising: a needle tube body 100 and a polymeric material tube body 200 disposed inside the needle tube body 100; the needle tube body 100 has at least one slotted hole 101 on the sidewall, and the polymeric material tube body 200 is cooperatively secured to the slotted hole 101.

[0022] In this embodiment, the polymer material tube body 200 is made of materials such as fibers, resins, plastics, and rubber, which are harmless to the human body. When the needle tube structure is in use, the guide wire is passed through the needle tube body 100 in the axial direction, and the polymer material tube body 200 is interposed between the guide wire and the needle tube body 100 to prevent the needle tube body 100 from scratching the skin of the guide wire.Furthermore, the side wall of the needle tube body 100 is provided with at least one slit hole 101, and the polymer material tube body 200 can fit into the slit hole 101, and the reinforcing material can be supplied through the slit hole 101 to improve the adhesive strength between the polymer material tube body 200 and the needle tube body 100, which increases the strength of the polymer material tube body 200 and reduces the risk of the polymer material tube body 200 falling off, which could lead to a medical incident.

[0023] As in the Fig. 1 and Fig. 2, in a first optional embodiment, the polymeric material tubular body 200 is inserted into the needle tube body 100, and the polymeric material tubular body 200 is fixed relative to the needle tube body 100 by an adhesive material injected through the slotted hole 101. The adhesive solution can penetrate through the slotted hole 101 into the gap between the outer wall of the polymeric material tubular body 200 and the inner wall of the needle tube body 100, so that the polymeric material tubular body 200 can be firmly connected to the needle tube body 100.

[0024] As in the Fig. 3 and Fig. 4, in a 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 join the needle tube body 100 to the polymer material tube body 200, so that the needle tube body 100 and the polymer material tube body 200 can be formed synchronously and a firm connection of the two is achieved to keep the processing efficiency relatively high.

[0025] In a third optional embodiment, the inner side wall of the needle tube body 100 is cured by spraying to form the polymer material tube body 200, so that the polymer material tube body 200 is bonded and glued to the inner side wall of the needle tube body 100, whereby the processing and shaping can also be carried out relatively quickly.

[0026] In a fourth optional embodiment, the needle tube body 100 and the polymer material tube body 200 are integrally formed by hot fusion, which is more efficient in production and more firmly bonds the needle tube body 100 and the polymer material tube body 200 after curing.

[0027] With reference to the Fig. 2, Fig. 4 and Fig. 5, the polymer material tube body 200 can be formed with a protrusion 201 that fits into the slotted hole 101 based on the above optional embodiment, and by embedding the protrusion 201 into the slotted hole 101, the stability of the polymer material tube body 200 with respect to the needle tube body 100 can be improved and the risk of the polymer material tube body 200 falling off can be reduced.

[0028] As in the Fig. 2 and Fig. 4, a needle tip blade 102 is arranged at the end of the needle tube body 100, which can cut and pierce the human tissue at the target position, and the polymer material tube body 200 has an incision 202 covering the inside of the needle tip blade 102, and the incision 202 can separate the guide wire passing through the needle tube body 100 from the needle tip blade 102 to prevent the guide wire from scratching the skin.

[0029] Furthermore, the needle tip blade 102 is flush with the notch 202 along the blade surface, and the blade surface is inclined with respect to the axis of the needle tube body 100; the inner edge 203 of the notch 202 is exposed from the blade surface near the axis of the needle tube body 100. If the blade surface inclined with respect to the axis of the needle tube body 100 has a flat or curved surface, the inner edge 203 is exposed from the blade surface; in other words, the inner edge 203 can contact the guide wire, so that the guide wire can be prevented from contacting the inner edge of the needle tip blade 102, and the guide wire, which is curved with respect to the axis of the needle tube body 100, is not scraped by the needle tip blade 102.

[0030] As in Fig.1, embodiments of the present utility model provide an endoscopic interventional instrument comprising: a guidewire and a needle tube construction as documented in the above embodiments, wherein the guidewire extends through the needle tube construction and renders the guidewire slidable along the needle tube construction.The needle tube body 100 can be implanted toward a distal end remote from the operating position, thereby achieving puncture of the human tissue at the target position, followed by implantation of the guidewire along the needle tube body 100. The polymer material tube body 200 is disposed between and separates the guidewire and the needle tube body 100, thereby preventing not only relative abrasion of the guidewire and the needle tube body 100, but also scraping and abrasion injury to the skin of the guidewire caused by the needle tube body 100. Furthermore, the polymer material tube body 200 is firmly connected to the needle tube body 100, thereby reducing the risk of medical malpractice caused by the polymer material tube body 200 falling off.

[0031] In the embodiments of the present utility model, the needle tube body 100 is slidably inserted into the outer tube 300, the outer tube 300 is inserted into an endoscope, and the visual operation of the needle tube body 100 is realized through the endoscope, and the needle tube body 100 can first be implanted through the outer tube 300 by means of the telescopic movement of the needle tube body 100 with respect to the outer tube 300 to a certain position, and then the needle tube body 100 can be extended with respect to the outer tube 300 to realize puncture of the human tissue at the target.Subsequently, the needle tube body 100 extends outward relative to the outer tube 300 to realize the puncture of the human tissue at the target position and then to implant the guide wire along the needle tube body 100 while avoiding the scratching of the guide wire by the needle tube body 100 by means of the polymer material tube body 200.

[0032] Finally, it should be noted that the above embodiments serve only to illustrate the technical solutions of the utility model and are not intended to limit them. Although the utility model has been described in detail with reference to the above embodiments, a person skilled in the art should understand that they may still modify the technical solutions described in the above embodiments or substitute some of the technical features contained therein with equivalents. These modifications or substitutions do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present application.

Claims

[1] A needle tube construction, characterized by in that it comprises: a needle tube body (100) and a tube body made of polymer material (200) arranged inside the needle tube body (100); the needle tube body (100) has at least one slotted hole (101) on the side wall, and the tube body made of polymer material (200) is cooperatively attached to the slotted hole (101). [2] Needle tube construction according to claim 1, characterized by that the tube body made of polymer material (200) is inserted into the needle tube body (100) and the tube body made of polymer material (200) is fixed with respect to the needle tube body (100) by an adhesive material injected from the slotted hole (101). [3] Needle tube construction according to claim 1, characterized bythat the needle tube body (100) and the tube body made of polymer material (200) are processed and formed by a co-injection process in order to connect the needle tube body (100) to the tube body made of polymer material (200). [4] Needle tube construction according to claim 1, characterized by that the inner side wall of the needle tube body (100) is formed by spraying the tube body made of polymer material (200) so that the tube body made of polymer material (200) is connected to and adheres to the inner side wall of the needle tube body (100). [5] Needle tube construction according to claim 1, characterized by that the needle tube body (100) is integrally formed with the tube body made of polymer material (200) by hot fusion. [6] Needle tube construction according to one of claims 1 to 5, characterized by that the tubular body is formed of polymer material (200) with a projection (201) which fits into the slotted hole (101). [7] Needle tube construction according to claim 1, characterized by that a needle tip blade (102) is arranged at the end of the needle tube body (100) and the tube body made of polymer material (200) has a cut (202) which covers the inside of the needle tip blade (102). [8] Needle tube construction according to claim 7, characterized by that the needle tip blade (102) is flush with the notch (202) along the blade surface, the blade surface being inclined with respect to an axis of the needle tube body (100); the inner edge (203) of the notch (202) near the axis of the needle tube body (100) is exposed from the blade surface. [9] Endoscopic interventional instrument, characterized by that it includes: a guide wire and a needle tube construction according to any one of claims 1 to 8, wherein the guide wire extends through the needle tube construction so that the guide wire is slidable along the needle tube construction. [10] Endoscopic interventional instrument according to claim 9, characterized by that the needle tube body (100) is slidably inserted into the outer tube (300).

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