A CGM puncture needle

Abstract

This utility model relates to the field of medical device technology, and in particular to a CGM puncture needle. The puncture needle includes a needle tube for accommodating a sensor and a needle tip disposed at the front end of the needle tube. Each of the two symmetrical sides of the needle tip has an upper and a lower cutting edge connected vertically. The bottom surface of the front end of the needle tip has a concave arc-shaped surface, so that the front end of the lower cutting edge is raised relative to the sensor. This application improves the sharpness of the needle tip by providing connected upper and lower cutting edges on both symmetrical sides of the needle tip. The concave arc-shaped surface raises the front end of the lower cutting edge relative to the sensor, thereby preventing scratches on the sensor surface during installation and ensuring sensor performance.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a CGM puncture needle. Background Technology

[0002] A CGM (Continuous Glucose Monitoring) system is a technology that indirectly reflects blood glucose levels by monitoring the glucose concentration in the interstitial fluid under the skin using a glucose sensor. It mainly consists of three core components: a sensor (probe), a transmitter, and a receiver (or smart device).

[0003] A sensor is a medical device that can be inserted into the human body to detect human health data such as blood sugar. It is usually used in conjunction with implantable components, such as by puncturing the skin with a puncture needle to insert the sensor probe subcutaneously (such as in the upper arm or abdomen), and then the puncture needle is withdrawn, leaving the sensor in place.

[0004] A puncture needle typically consists of a needle tip and a syringe. The syringe usually has an integrated needle hub at the end. Before the needle tip punctures the subcutaneous tissue, a sensor needs to be installed into the syringe. After the sensor is implanted, the puncture needle is withdrawn. The needle tip needs to be sharp enough to break the skin; therefore, the sensor needs to pass through the needle tip when being inserted into the syringe (see...). Figure 1 This can cause the needle tip to easily scratch the surface of the sensor, thus affecting the sensor's performance. Utility Model Content

[0005] The purpose of this utility model is to provide a CGM puncture needle that addresses the shortcomings of the existing technology by solving the technical problem that the needle tip of the existing puncture needle can easily scratch the surface of the sensor during sensor installation, thereby affecting the sensor performance.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a CGM puncture needle, including a needle tube for accommodating a sensor and a needle tip disposed at the front end of the needle tube. The two symmetrical sides of the needle tip are provided with an upper cutting surface and a lower cutting surface connected vertically. The bottom surface of the front end of the needle tip is provided with a concave arc-shaped surface so that the front end of the lower cutting surface is raised relative to the sensor.

[0007] Furthermore, the needle tip is triangular or conical.

[0008] Furthermore, the curved surface is V-shaped.

[0009] Furthermore, the tip of the needle is a spike, and the curved surface is correspondingly located on the bottom surface of the spike.

[0010] Furthermore, the cross-sectional length of the arc-shaped surface is L, and the range of L is 0.1mm-1.2mm.

[0011] Furthermore, the included angle of the curved surface gradually decreases from the tip towards the tail end of the needle, and the included angle is B, which ranges from 0° to 30°.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: the present invention improves the sharpness of the needle tip by providing an upper and lower cutting surface connected on both symmetrical sides of the needle tip, and the bottom surface of the front end of the needle tip is provided with a concave arc surface, so that the front end of the lower cutting surface is raised relative to the sensor, thereby avoiding scratches on the surface of the sensor during installation and ensuring the performance of the sensor. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the assembly structure of the sensor and the puncture needle in the prior art; Figure 2 This is a schematic diagram of the assembly structure of the sensor and the puncture needle in this utility model; Figure 3 This is a schematic diagram of the puncture needle in this utility model; Figure 4 yes Figure 2 Cross-sectional view of the assembled structure; Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0015] The details of the reference numerals used in the above figures are as follows: 1-Needle tube, 2-Needle tip, 21-Upper cutting edge, 22-Lower cutting edge, 23-Curved surface, 24-Spiked part, 3-Sensor. Detailed Implementation

[0016] In the description of this application, the terms "connected" and "linked" should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "linked" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0017] In the description of this application, the technical terms "upper", "lower", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0018] In order to better understand the above-mentioned objectives, technical solutions and advantages of this application, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings, and to understand in detail how to solve the problems raised in the background art.

[0019] like Figures 2 to 5 As shown, a CGM puncture needle includes a needle tube 1 for accommodating a sensor 3 and a needle tip 2 disposed at the front end of the needle tube 1. The two symmetrical sides of the needle tip 2 are provided with an upper cutting surface 21 and a lower cutting surface 22 connected vertically. The bottom surface of the front end of the needle tip 2 is provided with a concave arc-shaped surface 23 so that the front end of the lower cutting surface 22 is raised relative to the sensor 3.

[0020] With the above scheme, the needle tip 2 is provided with an upper cutting surface 21 and a lower cutting surface 22 connected on both symmetrical sides, which can improve the sharpness of the needle tip 2. In addition, the bottom surface of the front end of the needle tip 2 is provided with a concave arc-shaped surface 23, so that the front end of the lower cutting surface 22 is raised relative to the sensor 3, thereby avoiding scratches on the surface of the sensor 3 during installation and ensuring the performance of the sensor 3.

[0021] In this embodiment, the needle tip 2 is made of medical stainless steel, and the needle tube 1 is provided with a receiving groove for accommodating the sensor 3. The upper cutting surface 21, the lower cutting surface 22, and the arc-shaped surface 23 are all smooth surfaces and can be formed by grinding. Since the arc-shaped surface 23 is formed by grinding, the needle tip 2 does not need to be bent to make the front end curl up, which can ensure the structural strength of the needle tip 2. The arc-shaped surface 23 is concave downward, so during the grinding process, the thickness of the front end of the lower cutting surface 22 gradually decreases, so that the front end of the needle tip 2 and the sensor 3 successively avoid and adhere to each other. When avoiding, the needle tip 2 and the sensor 3 do not contact each other.

[0022] like Figure 3 As shown, in one specific embodiment of the improvement, the needle tip 2 is triangular or conical. Specifically, in this embodiment, a conical shape is preferred, which can enhance the sharpness of the needle tip 2 and reduce the pain and discomfort caused to the user; of course, in some embodiments, the needle tip 2 is triangular, which can increase the sharpness while ensuring the structural strength of the needle tip 2.

[0023] like Figure 3As shown, in one specific embodiment of the improvement, the arc surface 23 is V-shaped. Specifically, the arc surface 23 is disposed on the bottom surface of the needle tip 2 near the lower cutting edge 22, and the arc surface 23 is disposed along the edge of the lower cutting edge 22. In the process of forming the arc surface 23, the bottom surface of the needle tip 2 corresponding to the center of the arc surface 23 will be exposed first. That is, when the needle tip 2 enters, the sensor 3 will first contact the exposed bottom surface, which can avoid the sensor 3 from contacting the edge of the lower cutting edge 22, and further avoid the sensor 3 from being scratched during movement.

[0024] like Figure 2 and Figure 3 As shown, in one specific embodiment of the improvement, the tip 2 has a spike 24 at its front end, and an arc-shaped surface 23 is correspondingly disposed on the bottom surface of the spike 24. Specifically, based on the upper blade 21 and the lower blade 22, the sharpness of the spike 24 is enhanced, enabling it to quickly pierce the skin. At the same time, the arc-shaped surface 23 is correspondingly disposed on the bottom surface of the spike 24. Therefore, after the concave arc-shaped surface 23 is ground and formed, the overall thickness of the spike 24 is also reduced, making the spike 24 sharper and smaller, further enhancing the piercing effect on the skin.

[0025] like Figure 4 and Figure 5 As shown, in one specific embodiment of the improvement, the cross-sectional length of the arc-shaped surface 23 is L, which ranges from 0.1mm to 1.2mm. Specifically, the arc-shaped surface 23 is a smooth inclined surface. Based on the V-shaped structure of the arc-shaped surface 23, the length L of the two symmetrical sides of the arc-shaped surface 23 is the largest, for example, 1.2mm, and the length L at the connection between the center of the arc-shaped surface 23 and the foremost point of the bottom surface of the needle tip 2 is the smallest, for example, 0.1mm. In practical applications, the concave length of the arc-shaped surface 23 also gradually decreases. Therefore, the arc-shaped surface 23 is formed according to actual usage requirements, which can prevent the concave surface 23 from being too deep, causing the tip 24 to become brittle and thin, and reducing the risk of it falling into the subcutaneous tissue.

[0026] like Figure 4 and Figure 5 As shown, in one specific embodiment of the improvement, the included angle of the arc-shaped surface 23 gradually decreases from the tip 24 toward the tail end of the needle tip 2, and the included angle is B, which ranges from 0° to 30°. Specifically, the included angle B is the angle formed between the arc-shaped surface 23 and the surface of the sensor 3. The included angle B between the front end of the arc-shaped surface 23 and the sensor 3 is the largest, for example, 30 degrees, and the included angle B between the connection point of the arc-shaped surface 23 and the bottom surface of the needle tip 2 and the sensor 3 is the smallest, for example, 0 degrees. At this time, the arc-shaped surface 23 and the bottom surface of the needle tip 2 are smoothly connected, and the sensor 3 and the bottom surface of the needle tip 2 also begin to contact, avoiding the formation of a sharp edge between the arc-shaped surface 23 and the bottom surface of the needle tip 2 that could scratch the sensor 3, and also ensuring the structural strength of the tip 24.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be pointed out that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A CGM puncture needle, comprising a needle tube for receiving a sensor and a needle tip disposed at the front end of the needle tube, characterized in that, The needle tip has an upper and a lower cutting edge connected on both symmetrical sides. The bottom surface of the needle tip front end has a concave arc-shaped surface so that the front end of the lower cutting edge is raised relative to the sensor.

2. The CGM puncture needle according to claim 1, characterized in that, The needle tip is triangular or conical.

3. The CGM puncture needle according to claim 1, characterized in that, The curved surface is V-shaped.

4. The CGM puncture needle according to claim 1, characterized in that, The tip of the needle is a spike, and the arc-shaped surface is correspondingly disposed on the bottom surface of the spike.

5. A CGM puncture needle according to claim 4, characterized in that, The cross-sectional length of the arc-shaped surface is L, and the range of L is 0.1mm-1.2mm.

6. A CGM puncture needle according to claim 4, characterized in that, The included angle of the arc-shaped surface gradually decreases from the spike portion toward the tail end of the needle tip, and the included angle is B, with B ranging from 0° to 30°.

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