Needle core of dialysis remaining needle and dialysis remaining needle

Abstract

The embodiment of the utility model provides a needle core of a dialysis indwelling needle and the dialysis indwelling needle, the needle core of the dialysis indwelling needle comprises a blunt needle body, one end of the blunt needle body along the length direction is provided with a smooth convex surface, and the blunt needle body is provided with a tube cavity and a runner hole communicated with the tube cavity. According to the dialysis indwelling needle, one side of the needle head of the needle core is of the smooth and convex structure, the round and blunt needle point is adopted, direct puncture injury to the blood vessel wall is reduced, the puncture injury risk of medical staff is avoided, and puncture pain is reduced. The dialysis indwelling needle is suitable for conventional dialysis patients and hemodialysis patients difficult to puncture with conventional sharp needles, such as dialysis patients with deep blood vessels, short punctured blood vessels, serious blood vessel bending or intolerance to pain, and dialysis patients needing self-puncture management under the future home dialysis development trend. And the treatment quality and the medical experience of the dialysis patient are improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a needle core and a dialysis indwelling needle. Background Technology

[0002] Hemodialysis is one of the main treatment methods for patients with end-stage renal disease, and its effectiveness largely depends on the quality of the vascular access and the puncture technique. Dialysis treatment requires that a puncture needle be inserted into the arterial end of the vascular access to draw blood out, filter it through a dialyzer, and then return it to the patient through the venous end of the vascular access. Therefore, vascular access is a fundamental prerequisite for hemodialysis treatment.

[0003] The evolution of dialysis needles reflects the continuous progress of hemodialysis technology and a deeper understanding of patients' needs. In the development of hemodialysis technology, the main techniques include blunt needle puncture and sharp needle puncture.

[0004] Regarding the buttonhole blunt needle puncture technique, it is necessary to first repeatedly puncture the same channel with a sharp needle to form a fixed scar tunnel. After the scar tunnel is formed, a blunt needle is used to puncture through the tunnel for dialysis treatment. The rounded tip of the blunt needle does not have cutting force and can easily enter the blood vessel along the established tunnel. The buttonhole blunt needle puncture technique can significantly reduce arteriovenous fistula-related complications, effectively reduce patient pain, and is simple to operate. Patients can perform the puncture themselves, which aligns with the general trend of home dialysis development. In summary, the principle of dialysis buttonhole puncture tunnel formation is to repeatedly puncture at the same puncture point, angle, and depth to form a subcutaneous tunnel, and then use a blunt needle to puncture along the tunnel to enter the blood vessel, thereby reducing vascular damage and related complications and prolonging the lifespan of the arteriovenous fistula.

[0005] The current types of dialysis puncture techniques used in clinical practice and their existing problems are as follows:

[0006] Steel needle and sharp needle puncture techniques and problems: Puncture causes pain and psychological stress to patients; sharp needle puncture may cause damage to the vascular intima, increasing the risk of stenosis and aneurysm formation; the stainless steel material of the sharp needle body affects the patient's range of motion and reduces the patient's treatment comfort.

[0007] Sharp needle cannula puncture technique and its problems: Sharp needle puncture can easily damage blood vessels, potentially increasing the risk of hematoma formation, causing significant pain for the patient, and resulting in a poor patient experience.

[0008] Blunt needle and steel needle puncture techniques and problems: Stainless steel material affects the patient's mobility and reduces the patient's treatment comfort. The blunt metal needle has a cutting bevel, and the point of force of the needle tip is on the side wall of the tunnel during puncture. In clinical operation, it is easy to form a false puncture channel and damage the original tunnel.

[0009] In view of the above, this utility model is hereby proposed. Utility Model Content

[0010] To address one of the aforementioned technical deficiencies, this application provides a dialysis indwelling needle core and a dialysis indwelling needle in its embodiments.

[0011] The present invention adopts the following technical solution:

[0012] The primary objective of this application is to provide a needle core for a dialysis indwelling needle, comprising a blunt needle body, wherein one end of the blunt needle body along its length has a smooth, convex surface, and the blunt needle body has a lumen and a flow channel hole communicating with the lumen.

[0013] Optionally, the blunt needle body includes:

[0014] The needle body has the lumen;

[0015] A blunt tip is provided at one end of the needle body along its length and covers the end opening of the needle body. The blunt tip has a smooth, convex surface and the flow channel hole is formed on the blunt tip.

[0016] Optionally, the flow channel hole extends along the length of the needle body.

[0017] Optionally, the flow channel and the lumen have a smooth transition.

[0018] Optionally, at least two flow channel holes are provided on the blunt head, and each flow channel hole is arranged sequentially at intervals along the circumference of the needle body.

[0019] Optionally, the blunt head is provided with three flow channel holes, and each flow channel hole is arranged sequentially at intervals along the circumference of the needle body.

[0020] Optionally, the blunt tip and the needle body are integrally formed.

[0021] Optionally, the blunt needle body is provided with a scale mark, which is arranged along the length direction of the blunt needle body.

[0022] Optionally, the scale markings include a plurality of recessed markings or a plurality of convex markings disposed on the outer surface of the blunt needle body, wherein each of the recessed markings or each of the convex markings is arranged sequentially at intervals along the length direction of the blunt needle body.

[0023] The second objective of this application is to provide a dialysis indwelling needle, comprising:

[0024] Sleeve seat, the sleeve seat having a fluid passage;

[0025] A flexible hose, which is connected to the sleeve seat and communicates with the fluid passage;

[0026] The aforementioned needle core, wherein the blunt needle body of the needle core can penetrate the fluid channel and the hose.

[0027] By adopting the above technical solution, this application has the following beneficial effects:

[0028] The dialysis indwelling needle of this application is suitable for routine dialysis patients, as well as patients for whom sharp needle puncture is difficult. For dialysis patients with deep blood vessels, short puncturable vessels, severely tortuous vessels, or those who are intolerant to pain, and for dialysis patients who need to manage their own punctures under the future trend of home dialysis, this product improves treatment quality and the patient experience. The dialysis indwelling needle provided in this application has a smooth, convex structure on one side of the needle tip, using a blunt needle tip design. This design reduces the probability of damage to the blood vessel wall during puncture, avoids the risk of needlestick injury for medical personnel, and reduces the patient's puncture pain. Furthermore, it promotes vascular access health, ensures blood flow to the vascular access, and extends the lifespan of the vascular access, thereby extending the patient's survival. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 This diagram shows the external structure of the needle core of the dialysis indwelling needle provided in an embodiment of this application;

[0031] Figure 2 Show Figure 1 The first type of sectional view;

[0032] Figure 3 Show Figure 1 The second sectional view

[0033] Figure 4 This image shows a front view of the needle core of the dialysis indwelling needle provided in an embodiment of this application;

[0034] Figure 5 This document shows a schematic diagram of the structure of the dialysis indwelling needle provided in an embodiment of this application;

[0035] Figure 6 This diagram shows a partial structural schematic of the mating structure of the needle core and tubing of the dialysis indwelling needle provided in an embodiment of this application;

[0036] Figure 7 This diagram illustrates the dialysis indwelling needle provided in an embodiment of this application with the needle core in a separated state.

[0037] In the diagram: 100, needle core; 1, needle body; 11, lumen; 12, scale markings; 2, blunt tip; 21, flow channel hole; 3, blood return window; 200, cannula seat; 300, tubing; 310, side hole. Detailed Implementation

[0038] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0039] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] See Figures 1 to 7 As shown, this application embodiment provides a dialysis indwelling needle, including: a cannula seat 200, a flexible tube 300, and a needle core 100. The cannula seat 200 has a fluid channel, and the flexible tube 300 is connected to the cannula seat 200 and communicates with the fluid channel. Figure 5 and Figure 6 As shown, the needle core 100 can be a blunt needle that can penetrate the fluid channel and the tubing 300. Multiple side holes 310 can be provided at the end of the tubing 300. A dialysis tubing can be connected to the cannula seat 200. A blood return window 3 is provided at the tail of the needle core 100.

[0043] In the initial state, the needle core 100 passes through the tubing 300. During puncture, the needle core 100 and tubing 300 are first inserted into the patient's blood vessel. When blood return is visible in the blood return window 3 at the tail of the needle core 100, it can be advanced a small distance further to ensure that the tubing 300 is inside the blood vessel. Then, the needle core 100 can be pulled out.

[0044] The flexible tube 300 can be made of a flexible material and can be left in a blood vessel. As a soft structure, it offers good vascular compliance. The flexible tube 300 can be made of modified polyurethane material to improve biocompatibility and vascular compliance, eliminating the need for immobilization of the puncture limb and enhancing treatment comfort. The surface of the flexible tube 300 material can be specially treated (as per existing technology) to give it anticoagulant and antibacterial properties.

[0045] The dialysis indwelling needle provided in this application combines the advantages of buttonhole puncture and cannula, reducing the difficulty of puncture, reducing patient pain and discomfort, and improving patient experience.

[0046] The needle core 100 of the dialysis indwelling needle includes a blunt needle body, one end of which has a smooth, convex surface along its length, and the blunt needle body has a lumen 11 and a flow channel hole 21 communicating with the lumen 11.

[0047] The needle core 100 of the dialysis indwelling needle provided in this application has a smooth, convex structure on one side of the needle tip, using a blunt needle tip to reduce direct puncture damage to the blood vessel wall, avoid the risk of needlestick injury to medical personnel, and reduce the pain of puncture. The dialysis indwelling needle of this application is suitable for routine dialysis patients, such as elderly, obese, or patients with poor vascular conditions, improving dialysis efficiency, optimizing the utilization of medical resources, and potentially increasing the average number of treatments per dialysis machine per day.

[0048] The needle tip (or needle point) of the dialysis indwelling needle provided in this application can be optimized at one side to make the needle tip bullet-shaped. It adopts a progressive blunting design to minimize vascular trauma while ensuring the success rate of puncture, and greatly reduces the risk of false passage formation compared with ordinary blunt metal needles.

[0049] The dialysis indwelling needle of this application reduces vascular injury. The blunt needle design significantly reduces mechanical damage to the vascular intima, lowers the risk of aneurysm and pseudoaneurysm formation, reduces intimal hyperplasia, may delay the progression of arteriovenous fistula stenosis, and improves patient comfort. The blunt needle design also reduces pain during puncture. The 300 flexible tubing has a good conformability material, does not require patient limb immobilization, and provides high treatment comfort. The dialysis indwelling needle of this application can reduce the risk of infection, prolong the lifespan of the arteriovenous fistula, reduce vascular injury, extend the average lifespan of the arteriovenous fistula, and reduce the failure rate of arteriovenous fistulas.

[0050] The dialysis indwelling needle of this application has a wide range of applications, suitable for routine dialysis patients and those who have difficulty with conventional sharp needle puncture. It can improve the success rate of puncture by establishing a fixed puncture tunnel, such as for dialysis patients with deep blood vessels, short puncturable vessels, severely tortuous blood vessels, dialysis patients with pain intolerance, and dialysis patients who need to manage their own punctures under the future trend of home dialysis. The dialysis indwelling needle of this application has high economic benefits, can reduce complications, lower the annual treatment cost per patient, improve dialysis efficiency, and enhance the patient's treatment quality and medical experience.

[0051] See some possible implementations. Figures 1 to 4 As shown, the blunt needle body includes a needle body 1 and a blunt tip 2. The needle body 1 has a lumen 11. The blunt tip 2 is disposed at one end of the needle body 1 along its length and covers the end opening of the needle body 1. The blunt tip 2 has a smooth, convex surface and a flow channel hole 21 is formed on the blunt tip 2. The flow channel hole 21 is disposed on the bullet-shaped blunt tip 2, allowing blood to smoothly enter the lumen 11 of the needle body 1 through the flow channel hole 21 after the blunt needle body pierces the blood vessel.

[0052] In some possible implementations, the flow channel 21 extends along the length of the needle body 1. The extension direction of the flow channel 21 is approximately 180° to the extension direction of the blood vessel, which reduces blood flow resistance, helps maintain a more stable blood flow, and improves dialysis efficiency.

[0053] In some possible implementations, the flow channel 21 and the lumen 11 transition smoothly. The flow channel 21 may also transition smoothly to the surface of the blunt tip 2. In this implementation, the extension directions of the flow channel 21 and the lumen 11 are nearly parallel, which reduces blood flow resistance, helps maintain a stable blood flow rate, and improves dialysis efficiency.

[0054] In some possible implementations, at least two flow channel holes 21 are provided on the blunt tip 2, and each of the flow channel holes 21 is arranged sequentially at intervals along the circumference of the needle body 1.

[0055] By setting multiple flow channels 21 on the blunt tip 2, blood flow can be increased and penetration efficiency improved. The flow channels 21 are arranged sequentially at intervals along the circumference of the needle body 1, which facilitates uniform blood flow.

[0056] Compared to traditional blunt steel needles, the needle core 100 of this application has its center of gravity in the center of the needle tip (i.e., blunt tip 2) during puncture and advancement. The needle tip of a traditional blunt steel needle is designed with a bevel, and the point of force for puncture is on the side wall, which can easily damage the tunnel wall. In contrast, the needle core 100 of this application has a better sense of puncture direction than traditional blunt needles and is less likely to damage the tunnel wall and form a false tunnel.

[0057] In some possible implementations, the blunt tip 2 is provided with three flow channel holes 21, and each flow channel hole 21 is arranged sequentially at intervals along the circumference of the needle body 1.

[0058] Experiments have shown that when the blunt tip 2 is provided with three flow channel holes 21, the needle structure strength of the needle core 100 meets the requirements, the blood flow is moderate during use, and the penetration efficiency is high.

[0059] In some possible implementations, the blunt tip 2 and the needle body 1 are integrally formed. The entire needle core 100 is a single piece, resulting in high structural strength and high safety.

[0060] See some possible implementations. Figure 3 As shown, the blunt tip 2 of the blunt needle body can be a solid structure. The needle tip structure of the blunt needle body has high strength, is not easily deformed, will not easily break, and has high safety and good reliability.

[0061] In some possible implementations, the blunt needle body is provided with graduation marks 12, which are arranged along the length of the blunt needle body. Medical personnel can determine the puncture depth of the needle core 100 by referring to the graduation marks 12, which facilitates the puncture operation and improves the accuracy of puncture.

[0062] In some possible implementations, the scale markings 12 include a plurality of recessed markings or a plurality of convex markings disposed on the outer surface of the blunt needle body, wherein each of the recessed markings or each of the convex markings is arranged sequentially at intervals along the length direction of the blunt needle body.

[0063] In this embodiment, the recessed marking portion can be a recess formed on the outer surface of the blunt needle body. The recessed marking portion can be strip-shaped or other shapes, such as number shapes, and the recessed marking portions are arranged at equal intervals along the length direction of the blunt needle body. The convex marking portion can also be a coating covering the blunt needle body, or a raised strip formed on the surface of the blunt needle body. The coating and the raised strip can be number shapes or straight strip shapes.

[0064] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0065] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0066] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A needle core for a dialysis indwelling needle, characterized in that, It includes a blunt needle body, one end of which has a smooth, convex surface along its length, and the blunt needle body has a cavity and a flow channel hole communicating with the cavity; The blunt needle body includes: The needle body has the lumen; A blunt tip is provided at one end of the needle body along its length and covers the end opening of the needle body. The blunt tip has a smooth, convex surface and at least two flow channel holes are provided on the blunt tip. Each flow channel hole is arranged sequentially at intervals along the circumference of the needle body. The blunt tip of the blunt needle body is a solid structure.

2. The needle core of the dialysis indwelling needle according to claim 1, characterized in that, The flow channel hole extends along the length of the needle body.

3. The needle core of the dialysis indwelling needle according to claim 1, characterized in that, The flow channel and the lumen have a smooth transition.

4. The needle core of the dialysis indwelling needle according to claim 1, characterized in that, The blunt head is provided with three flow channel holes, and each flow channel hole is arranged sequentially at intervals along the circumference of the needle body.

5. The needle core of the dialysis indwelling needle according to any one of claims 1-4, characterized in that, The blunt needle body is provided with scale markings, which are arranged along the length direction of the blunt needle body.

6. The needle core of the dialysis indwelling needle according to claim 5, characterized in that, The scale markings include a plurality of recessed markings or a plurality of convex markings disposed on the outer surface of the blunt needle body, and each of the recessed markings or convex markings is arranged sequentially at intervals along the length direction of the blunt needle body.

7. A dialysis indwelling needle, characterized in that, include: Sleeve seat, the sleeve seat having a fluid passage; A flexible hose, which is connected to the sleeve seat and communicates with the fluid passage; The needle core as described in any one of claims 1-6, wherein the blunt needle body of the needle core can penetrate the fluid channel and the tubing.

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