Anti-bending remaining needle

Abstract

The utility model discloses an anti-bending remaining needle, and relates to the technical field of medical instruments. In order to solve the problem of unsmooth liquid dropping caused by easy bending of a sleeve, the utility model designs the anti-bending indwelling needle which is mainly structurally characterized in that the injector-type water-drop-shaped needle plug and the three-way cone frustum-shaped needle seat are adopted, so that the sealing performance is good, and the bending can be reduced at the same time; the end part of the extension tube is coated with the air bag, so that bending caused by factors such as external stress is avoided; the needle core can be stably and conveniently pulled out by the needle pulling device, so that the needle core is prevented from deflecting; the anti-bending indwelling needle can effectively resist bending, and is low in cost and suitable for wide popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an anti-bending indwelling needle. Background Art

[0002] The intravenous indwelling needle is also called the intravenous cannula needle. The core components include a soft catheter / cannula that can be indwelled in the blood vessel, and a stainless steel puncture guide needle core. When in use, the cannula and the needle core are punctured into the blood vessel together. When the cannula is completely in the blood vessel, the needle core is withdrawn, and only the soft cannula is indwelled in the blood vessel for infusion therapy.

[0003] The blood vessel is located under the skin and parallel to the skin, while the cannula is a straight needle. In the initial stage of placement, the cannula remains straight and will not bend, resulting in poor dripping. When the cannula is softened by the temperature of the blood vessel, it will be parallel to the blood vessel. In addition, the cannula may bend due to limb movement or angle problems when fixed with medical tape. At this time, the part of the cannula needle on the skin may also be slightly displaced due to fixation, which will inevitably cause bending, hindering the flow of liquid, resulting in liquid not dripping, which is not conducive to patient infusion.

[0004] The patent with publication number CN206424376U discloses an intravenous indwelling needle, including a connecting sleeve, a catheter, an elastic element, and a needle assembly. The needle assembly includes a needle and a needle seat. One end of the needle is fixed to the needle seat, and the other end passes through the connecting sleeve and extends into the elastic element. The elastic element is connected to the connecting sleeve, and the catheter is outermost on the connecting sleeve.

[0005] However, the elastic element of the utility model is located inside the catheter, which poses a risk of infection. Summary of the invention

[0006] In view of the above problems, the technical ideas adopted by the utility model to solve the technical problems are:

[0007] A syringe-type needle cannula is used, and an air bag is arranged at the end of the extension tube to ensure smooth infusion even after bending.

[0008] The specific plan is as follows:

[0009] A bending-resistant indwelling needle comprises a needle core, an outer sleeve, a needle seat, a needle plug, a needle puller, an air bag and an extension tube, wherein the needle core axially penetrates the outer sleeve, one end of the needle plug is connected to the outer sleeve, and the other end is connected to one end of the needle seat; the needle core penetrates the needle plug and extends to the inside of the needle seat, and is connected to the needle puller; one end of the extension tube is connected to the side of the needle seat, and the end of the extension tube close to the needle seat is covered with the air bag; the other end of the needle seat is provided with a needle puller.

[0010] Furthermore, the needle plug is in the shape of a solid teardrop, and its diameter is within 1.2 mm.

[0011] In order to realize the above scheme, a preferred scheme is that the needle seat is in the shape of a hollow frustum of a cone, the small end is connected to the needle plug, and the large end is connected to the needle puller.

[0012] Another preferred solution is that a horizontal surface is provided on the side of the needle seat for fitting against the skin.

[0013] By adopting the above technical solution, the utility model has the following technical effects:

[0014] The syringe-type teardrop-shaped needle plug and three-way frustum-shaped needle seat have good sealing performance and can reduce bending; the end of the extension tube is covered with an air bag to avoid bending due to external forces and other factors; the needle puller can stably and conveniently pull out the needle core to avoid needle core deflection; the utility model is an anti-bending indwelling needle that can effectively resist bending and has a low cost, and is suitable for wide promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the embodiments are briefly introduced below.

[0016] Figure 1 It is an overall diagram of the utility model;

[0017] Figure 2 It is a perspective view of the utility model;

[0018] Figure 3 is a schematic diagram of the needle holder;

[0019] Figure 4 is a schematic diagram of the needle plug;

[0020] Figure 5 It is a usage diagram of the utility model;

[0021] Figure 6 is a schematic diagram of a needle holder having a horizontal plane;

[0022] Icons: 1. Needle core; 2. Outer sleeve; 3. Needle plug; 4. Needle seat; 5. Needle puller; 6. Air bag; 7. Extension tube. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the following will be combined with the appended Figure 1-6 , the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present application, it should be noted that the terms "center", "up", "down", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connected" and "connected" should be understood in a broad sense. Embodiment 1

[0027] The inventors have found that the blood vessels are located under the skin and parallel to the skin, and the cannula is a straight needle. In the initial stage of placement, the cannula remains straight and will not bend, resulting in poor dripping. When the cannula is softened by the temperature of the blood vessels, it will be parallel to the blood vessels. In addition, the cannula may be bent due to limb activities or angle problems when fixed with medical tape. At this time, the part of the cannula needle on the skin may also be slightly displaced due to fixation, which will inevitably cause bending, hindering the flow of liquid, resulting in liquid not dripping, which is not conducive to patient infusion.

[0028] Therefore, refer to Figure 1-5 As shown, the present application provides a bending-resistant indwelling needle, comprising a needle core 1, an outer sleeve 2, a needle plug 3, a needle seat 4, a needle puller 5, an air bag 6 and an extension tube 7;

[0029] In the above technical solution, the needle plug 3 is in the shape of a solid teardrop, which has good sealing performance and can reduce bending. A through groove matching the needle core is axially opened in the center of the needle plug; one end of a soft outer sleeve 2 is axially welded in the center of the spherical end; the needle core 1 passes through the middle of the outer sleeve axially, and the needle tip of the needle core is exposed outside the outer sleeve. The tail end of the needle core is inserted from the through groove of the spherical end and extends to the inside of the needle seat, and is clamped with the left end of the needle remover;

[0030] Specifically, the needle puller 5 has a truncated cone-shaped base on the left side and a cylindrical handle on the right side, and the base and the handle are welded integrally; a groove matching the tail end of the needle core is provided at the left end of the base for clamping the tail end of the needle core; when pulling out the needle, the handle is convenient for medical staff to grasp, and a needle plug is provided at the front end of the needle core for positioning, so that the needle core will not be displaced or deflected in the left and right directions when it is pulled out;

[0031] Furthermore, the needle seat 4 is in the shape of a three-way hollow frustum; a through groove matching the outer diameter of the needle plug is axially opened in the center of the small-mouthed end of the needle seat, the tip of the needle plug faces the needle seat and is welded or clamped to the through groove at the small-mouthed end; a through groove matching the base of the needle puller is axially opened in the center of the large-mouthed end of the needle seat, and the base is clamped or threadedly connected to the through groove; a through groove matching the extension tube is opened on the side of the needle seat, the inner side of the through groove is welded to the outer diameter of one end of the extension tube 7, the outer side of the through groove is bonded or welded to one end of the elliptical airbag 6, and the other end of the airbag is bonded or welded to the tube body of the extension tube; the airbag covers the end of the extension tube to prevent bending due to external forces and other factors. Embodiment 2

[0032] refer to Figure 6 As shown, different from the first embodiment, a horizontal plane is axially arranged on the lower side of the hollow truncated cone-shaped needle seat. When it is necessary to fix it with medical tape, the horizontal plane fits with the patient's skin, thereby improving the patient's comfort.

[0033] When the outer sleeve is softened by the temperature of the blood vessels, it will be parallel to the blood vessels. In addition, due to the influence of limb movement or the angle problem when fixed with medical tape, the outer sleeve will bend, which will hinder the flow of liquid and cause the liquid to not drip.

[0034] The utility model discloses an anti-bending indwelling needle which can effectively resist bending and has low cost, and is suitable for wide promotion; the syringe-type teardrop-shaped needle plug and the three-way frustum-shaped needle seat have good sealing performance and can reduce bending; the end of the extension tube is covered with an air bag to avoid bending due to external forces and other factors; the needle puller can stably and conveniently pull out the needle core to avoid needle core deflection.

[0035] When using an indwelling needle, the outer sleeve and the needle core are punctured into the patient's blood vessel. After the outer sleeve enters the blood vessel, the needle core is pulled out by a needle puller, and the outer sleeve is left in the blood vessel for infusion.

[0036] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bending-resistant indwelling needle, comprising a needle core (1), an outer sleeve (2) and a needle seat (4), wherein the needle core (1) penetrates the outer sleeve (2) along the axial direction, and is characterized in that: It also comprises a needle plug (3), one end of the needle plug (3) is connected to the outer sleeve (2), and the other end is connected to one end of the needle seat (4); The needle core (1) passes through the needle plug (3) and extends into the interior of the needle seat (4).

2. The anti-bending indwelling needle according to claim 1, characterized in that: The needle plug (3) is in the shape of a solid water drop.

3. The anti-bending indwelling needle according to claim 2, characterized in that: The diameter of the needle plug (3) is within 1.2 mm.

4. The anti-bending indwelling needle according to claim 1, characterized in that: The needle seat (4) is in the shape of a hollow truncated cone, with the needle plug (3) connected to the small end and the needle remover (5) connected to the large end.

5. The anti-bending indwelling needle according to claim 4, characterized in that: A horizontal surface is provided on the side of the needle seat (4) for fitting against the skin.

6. The anti-bending indwelling needle according to claim 5, characterized in that: One end of an extension tube is connected to the side surface of the needle seat (4).

7. The anti-bending indwelling needle according to claim 6, characterized in that: The end of the extension tube (7) close to the needle seat (4) is covered with an air bag (6).

Images