Friction-reducing lubricated puncture needle

Abstract

The application discloses a puncture needle with friction-reducing lubrication, which has a microstructure in the form of a butterfly-shaped groove on the outer surface of the puncture needle; the microstructure is uniformly distributed on the surface of the puncture needle, and the microstructure can quickly collect tissue fluid during puncture and needle withdrawal, and realize friction-reducing lubrication. During puncture, tissue fluid enters through the front end microstructure taper angle, and during needle withdrawal, tissue fluid enters through the rear end microstructure taper angle. Through the design of the microstructure vertex angle, length and center distance parameters, tissue fluid can be effectively collected and stored as a lubricant during the puncture process, so that the friction between the puncture needle and the skin soft tissue is reduced, and a good friction-reducing lubrication effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of medical puncture needle technology, specifically to a friction-reducing and lubricating puncture needle. Background Technology

[0002] Medical puncture needles are commonly used instruments in modern medical diagnosis and treatment. However, the pain caused by the needle piercing the skin can cause severe discomfort to patients. Pain, as a stress response, has a multi-layered mechanism, and scholars have conducted extensive research to elucidate its generation. Addressing the issues of high frictional resistance, severe soft tissue deformation, and intense pain during puncture, this invention combines the current research status of soft tissue material properties, puncture mechanisms, and microstructures to propose an optimized design of the puncture needle surface microstructure and a study of puncture force. By applying microstructures to the puncture needle, the influence of the needle surface microstructure on puncture force is studied. Through optimized surface microstructure design, the optimal microstructure size and array are obtained, improving friction during puncture, reducing tearing of soft tissue, lowering puncture resistance, and thus reducing pain.

[0003] Chinese invention patent application number 201610570360.4 discloses a novel medical painless syringe needle. The surface of the syringe needle tube is provided with an irregular surface, specifically a pitted, serrated, or corrugated surface. The invented syringe needle has a smaller contact area with the skin tissue, reducing nerve stimulation and significantly reducing the pain caused by injection. Chinese invention patent application number 202211063708.2 discloses a painless puncture needle and its painless puncture method. The blades on both sides of the needle tube are designed to resemble the edge of a mosquito's mandible, including three bidirectional sharp edges with uneven spacing. However, current inventions related to painless puncture needles have relatively simple designs for the needle surface structure, resulting in greater friction and pain during needle withdrawal, and lack methods for optimizing microstructure design. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by applying microstructures to the surface of the puncture needle, providing a friction-reducing and lubricating puncture needle that enables automatic collection of tissue fluid during the puncture process, thereby reducing friction, lubricating, and alleviating pain.

[0005] Technical solution: The technical solution adopted in this invention is as follows:

[0006] A friction-reducing and lubricating puncture needle, wherein the surface of the puncture needle has multiple butterfly-shaped grooves and the microstructures are evenly distributed on the surface of the puncture needle, and the tip angle θ of the puncture needle is 10-25°.

[0007] In some embodiments, the microstructure is symmetrical, and each microstructure consists of two identical isosceles trapezoids with overlapping upper bases. The length of the lower base is the length d of the microstructure, and the angle between the lower base and the waist is the vertex angle β of the microstructure.

[0008] Furthermore, the microstructure length d is 20-200 μm, and the microstructure vertex angle β is 10-45°.

[0009] In some embodiments, on the surface of the puncture needle, the microstructures are arranged in parallel along the axial direction of the puncture needle, the length direction of the microstructures is parallel to the central axis of the puncture needle, and the corresponding lower bases of each row of microstructures are located on the same straight line.

[0010] Furthermore, in parallel arrangement of the same type, the center-to-center distance 'a' between adjacent microstructures is 25-500 μm.

[0011] In some embodiments, the depth of the microstructure is 20-200 μm, where the depth refers to the radial height difference between the surface of the puncture needle and the bottom surface of the microstructure.

[0012] In some embodiments, the surface microstructure design method includes:

[0013] A physical model with symmetrical microstructures on the surface was established based on Abaqus simulation software.

[0014] Establish the dynamic process of acupuncture in soft tissue, analyze the tissue deformation during the insertion process, and study the degree of tissue tearing, needle stress and deformation during the puncture process.

[0015] With the goal of minimizing the puncture force during the puncture process, the tip angle θ of the puncture needle is optimized.

[0016] Furthermore, surface microstructure design methods also include:

[0017] This study investigates the needle insertion and withdrawal stages after tissue puncture during the puncture process, analyzes the forces acting on the needle during puncture, and establishes a segmented model of the puncture force.

[0018] The optimization objectives are to minimize friction, needle deformation, and stress during puncture. The microstructure length d, microstructure apex angle β, and the distance between the centers of adjacent microstructures are optimized.

[0019] The beneficial effects of this invention compared to the prior art are as follows:

[0020] 1. The optimized tip angle of the puncture needle in this invention can reduce the puncture force and the contact area with the skin during needle insertion and withdrawal, thereby reducing the pain.

[0021] 2. The symmetrical microstructure on the surface of the puncture needle provided by the present invention can realize the automatic collection and storage of tissue fluid in two different directions during the needle insertion and withdrawal process. The tissue fluid stored in the microstructure can act as a lubricant, thereby achieving the effect of friction reduction and lubrication.

[0022] 3. The surface structure optimization method of the puncture needle of the present invention can enable the puncture needle to achieve the optimal friction reduction and lubrication effect during the insertion and withdrawal process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the friction-reducing and lubricating puncture needle of the present invention;

[0024] Figure 2 This is a schematic diagram of the microstructure of the friction-reducing and lubricating puncture needle surface of the present invention;

[0025] Wherein, 1-outer wall of puncture needle, 2-symmetrical microstructure cone angle array, 3-apex angle of puncture needle tip θ, 4-length of symmetrical microstructure cone angle d, 5-apex angle of symmetrical microstructure cone angle β, 6-center spacing of symmetrical microstructure cone angle a. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described more clearly and completely below with reference to the accompanying drawings in the embodiments of this invention.

[0027] A friction-reducing and lubricating puncture needle, wherein the surface of the puncture needle has multiple butterfly-shaped grooves of microstructure, the microstructures being uniformly distributed on the surface of the puncture needle, and the tip angle of the puncture needle being θ;

[0028] The microstructures are symmetrical, each consisting of two identical isosceles trapezoids with overlapping upper bases. The length of the lower base is the length d of the microstructure, and the angle between the lower base and the leg is the vertex angle β of the microstructure. The center-to-center distance between adjacent microstructures is a.

[0029] To investigate and optimize the range of four parameters—the tip angle θ of the puncture needle, the length d of the microstructure, the tip angle β of the microstructure, and the center-to-center distance a of adjacent microstructures—this application proposes a surface microstructure design method, including:

[0030] A physical model with symmetrical microstructures on the surface was established based on Abaqus simulation software.

[0031] Establish the dynamic process of acupuncture in soft tissue, analyze the tissue deformation during the insertion process, and study the degree of tissue tearing, needle stress and deformation during the puncture process.

[0032] With the goal of minimizing the puncture force during the puncture process, the tip angle θ of the puncture needle is optimized.

[0033] Furthermore, surface microstructure design methods also include:

[0034] This study investigates the needle insertion and withdrawal stages after tissue puncture during the puncture process, analyzes the forces acting on the needle during puncture, and establishes a segmented model of the puncture force.

[0035] The optimization objectives are to minimize friction, needle deformation, and stress during puncture. The microstructure length d, microstructure apex angle β, and the distance between the centers of adjacent microstructures are optimized.

[0036] The optimized needle tip apex angle θ is 10-25°, the microstructure length d is 20-200μm, the microstructure apex angle β is 10-45°, and the distance between the centers of adjacent microstructures a is 25-500μm.

[0037] In addition, based on clinical experience, the depth of the microstructure is 20-200 μm, where the depth refers to the radial height difference between the surface of the puncture needle and the bottom surface of the microstructure.

[0038] Example 1:

[0039] A friction-reducing and lubricating puncture needle has a microstructure with butterfly-shaped grooves on its surface, the microstructures being uniformly distributed on the surface of the puncture needle, and the tip angle θ of the puncture needle being 10°.

[0040] The aforementioned friction-reducing and lubricating puncture needle has a symmetrical microstructure. Each microstructure consists of two identical isosceles trapezoids with overlapping upper bases. The length d of the microstructure is 20 μm, and the apex angle β is 10°. On the surface of the puncture needle, the microstructures are arranged in parallel along the axial direction of the puncture needle. The length direction of the microstructures is parallel to the central axis of the puncture needle, and the lower bases of each row of microstructures are on the same straight line. The center-to-center distance a between adjacent microstructures is 25 μm.

[0041] The depth of the microstructure is 20 μm, where the depth refers to the radial height difference between the surface of the puncture needle and the bottom surface of the microstructure.

[0042] Example 2:

[0043] A friction-reducing and lubricating puncture needle has a microstructure with butterfly-shaped grooves on its surface, the microstructures being uniformly distributed on the surface of the puncture needle, and the tip angle θ of the puncture needle being 15°.

[0044] The aforementioned friction-reducing and lubricating puncture needle has a symmetrical microstructure. Each microstructure consists of two identical isosceles trapezoids with overlapping upper bases. The length d of the microstructure is 60 μm, and the vertex angle β is 20°. On the surface of the puncture needle, the microstructures are arranged in parallel along the axial direction of the puncture needle. The length direction of the microstructures is parallel to the central axis of the puncture needle, and the lower bases of each row of microstructures are on the same straight line. The center-to-center distance a between adjacent microstructures is 100 μm.

[0045] The depth of the microstructure is 60 μm, where the depth refers to the radial height difference between the surface of the puncture needle and the bottom surface of the microstructure.

[0046] Example 3:

[0047] A friction-reducing and lubricating puncture needle has a microstructure with butterfly-shaped grooves on its surface, the microstructures being uniformly distributed on the surface of the puncture needle, and the tip angle θ of the puncture needle being 20°.

[0048] The aforementioned friction-reducing and lubricating puncture needle has a symmetrical microstructure. Each microstructure consists of two identical isosceles trapezoids with overlapping upper bases. The length d of the microstructure is 100 μm, and the apex angle β is 30°. On the surface of the puncture needle, the microstructures are arranged in parallel along the axial direction of the puncture needle. The length direction of the microstructures is parallel to the central axis of the puncture needle, and the lower bases of each row of microstructures are on the same straight line. The center-to-center distance a between adjacent microstructures is 250 μm.

[0049] The depth of the microstructure is 100 μm, where the depth refers to the radial height difference between the surface of the puncture needle and the bottom surface of the microstructure.

[0050] Example 4:

[0051] A friction-reducing and lubricating puncture needle has a butterfly-shaped groove microstructure on its surface, the microstructure being uniformly distributed on the surface of the puncture needle, and the tip angle θ of the puncture needle being 25°.

[0052] The aforementioned friction-reducing and lubricating puncture needle has a symmetrical microstructure. Each microstructure consists of two identical isosceles trapezoids with overlapping upper bases. The length d of the microstructure is 200 μm, and the apex angle β is 45°. On the surface of the puncture needle, the microstructures are arranged in parallel along the axial direction of the puncture needle. The length direction of the microstructures is parallel to the central axis of the puncture needle, and the lower bases of each row of microstructures are on the same straight line. The center-to-center distance a between adjacent microstructures is 500 μm.

[0053] The depth of the microstructure is 200 μm, where the depth refers to the radial height difference between the surface of the puncture needle and the bottom surface of the microstructure.

[0054] Comparative Example 1:

[0055] A friction-reducing and lubricating puncture needle has a microstructure with butterfly-shaped grooves on its surface, the microstructures being uniformly distributed on the surface of the puncture needle, and the tip angle θ of the puncture needle being 5°.

[0056] The aforementioned friction-reducing and lubricating puncture needle has a symmetrical microstructure. Each microstructure consists of two identical isosceles trapezoids with overlapping upper bases. The length d of the microstructure is 10 μm, and the apex angle β is 5°. On the surface of the puncture needle, the microstructures are arranged in parallel along the axial direction of the puncture needle. The length direction of the microstructures is parallel to the central axis of the puncture needle, and the lower bases of each row of microstructures are on the same straight line. The center-to-center distance a between adjacent microstructures is 10 μm.

[0057] The depth of the microstructure is 10 μm, where the depth refers to the radial height difference between the surface of the puncture needle and the bottom surface of the microstructure.

[0058] Comparative Example 2:

[0059] A friction-reducing and lubricating puncture needle has a microstructure with butterfly-shaped grooves on its surface, the microstructures being uniformly distributed on the surface of the puncture needle, and the tip angle θ of the puncture needle being 30°.

[0060] The aforementioned friction-reducing and lubricating puncture needle has a symmetrical microstructure. Each microstructure consists of two identical isosceles trapezoids with overlapping upper bases. The length d of the microstructure is 300 μm, and the apex angle β is 55°. On the surface of the puncture needle, the microstructures are arranged in parallel along the axial direction of the puncture needle. The length direction of the microstructures is parallel to the central axis of the puncture needle, and the lower bases of each row of microstructures are on the same straight line. The center-to-center distance a between adjacent microstructures is 600 μm.

[0061] The depth of the microstructure is 300 μm, where the depth refers to the radial height difference between the surface of the puncture needle and the bottom surface of the microstructure.

[0062] Comparative Example 3:

[0063] The document "202211063708.2" discloses a painless puncture needle.

[0064] The friction-reducing and lubricating puncture needles of Examples 1-4, Comparative Examples 1-2, and the painless puncture needle of Comparative Example 3 were used in clinical puncture trials, and feedback on pain experience was collected from the test subjects. The conclusions are as follows: Compared to the painless puncture needle of Comparative Example 3, the friction-reducing and lubricating puncture needles of Examples 1-4 of this invention can significantly reduce friction with human skin and tissue, allowing for painless insertion into the skin and reducing pain, thus possessing value for widespread application. Furthermore, compared to the friction-reducing and lubricating puncture needles of Comparative Examples 1-2, the friction-reducing and lubricating puncture needles of Examples 1-4, with optimized parameters, cause even less pain.

[0065] The above specific embodiments are only for illustrating the technical concept and structural features of the present invention, and are intended to enable those skilled in the art to implement them. However, the above content does not limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit and essence of the present invention should fall within the scope of protection of the present invention.

Claims

1. A friction-reducing and lubricating puncture needle, characterized in that: The surface of the puncture needle has multiple butterfly-shaped grooves and microstructures that are evenly distributed on the surface of the puncture needle. The apex angle θ of the puncture needle tip is 10-25°. The microstructure is symmetrical, and each microstructure is composed of two identical isosceles trapezoids with overlapping upper bases. The length of the lower base is the length d of the microstructure, and the angle between the lower base and the leg is the vertex angle β of the microstructure. The length d of the microstructure is 20-200 μm, and the vertex angle β of the microstructure is 10-45°. On the surface of the puncture needle, the microstructures are arranged in parallel along the axial direction of the puncture needle, and the length direction of the microstructures is parallel to the central axis of the puncture needle. The corresponding lower bases of each row of microstructures are located on the same straight line. In the row of parallel arrangement, the center-to-center distance 'a' between adjacent microstructures is 25-500 μm. The depth of the microstructure is 20-200 μm, where the depth refers to the radial height difference between the surface of the puncture needle and the bottom surface of the microstructure.

2. The friction-reducing and lubricating puncture needle according to claim 1, characterized in that, Surface microstructure design methods include: A physical model with symmetrical microstructures on the surface was established based on Abaqus simulation software. Establish the dynamic process of acupuncture in soft tissue, analyze the tissue deformation during the insertion process, and study the degree of tissue tearing, needle stress and deformation during the puncture process. With the goal of minimizing the puncture force during the puncture process, the tip angle θ of the puncture needle is optimized.

3. The friction-reducing and lubricating puncture needle according to claim 2, characterized in that, Surface microstructure design methods also include: This study investigates the needle insertion and withdrawal stages after tissue puncture during the puncture process, analyzes the forces acting on the needle during puncture, and establishes a segmented model of the puncture force. The optimization objectives are to minimize friction, needle deformation, and stress during puncture. The microstructure length d, microstructure apex angle β, and the distance between the centers of adjacent microstructures are optimized.

Images