Edge sharpening structure for CGM guide needle
By designing a CGM guide needle with a triangular blade tip, a U-shaped needle body, and an integrated structure, the shortcomings of traditional guide needles in terms of puncture accuracy, cutting performance, and safety are solved, achieving a high-precision, stable, and durable puncture effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional guide needles are insufficient in terms of puncture accuracy, cutting performance and safety, making it difficult to meet the needs of high-precision medical monitoring and interventional treatment. In addition, the structural design does not fully consider durability, and parts are prone to falling off or being damaged.
A blade structure for CGM guide needles was designed, including a triangular blade tip, a U-shaped needle body, and an integrated structure. The combination of an arc-shaped transition section and a coplanar triangular surface optimizes the puncture resistance, cutting performance, and connection stability of the blade.
It improves puncture accuracy and stability, optimizes cutting performance, enhances instrument safety and durability, and is suitable for repeated puncture operations over a long period of time.
Smart Images
Figure CN224112673U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular discloses a bladed structure for a CGM guide needle. Background Technology
[0002] In continuous glucose monitoring (CGM) technology, the performance of the guide needle is crucial. Traditional guide needles have many shortcomings in terms of puncture accuracy, cutting performance, safety, and durability. Regarding puncture accuracy, ordinary needles lack an effective guiding structure, making them prone to deviation during puncture and difficult to accurately reach specific sites within the body. This significantly impacts treatment effectiveness and data accuracy for high-precision medical monitoring or interventional treatments. In terms of cutting performance, previous blade designs were unreasonable, with insufficiently sharp tips, poor blade angles, and inaccurate cutting lines, resulting in high puncture resistance and difficulty in effectively cutting tissue to create a channel. This not only makes operation difficult but also causes serious damage to surrounding tissues, increasing patient pain and the risk of postoperative complications. Furthermore, the structural design of traditional guide needles does not adequately consider safety and durability. Component connections often use welding or threaded connections, which are prone to component detachment or separation. Moreover, during repeated punctures, stress concentration easily damages the connection points, failing to meet the needs of long-term, repeated puncture operations. This severely affects the lifespan and safety of the device, making it difficult to ensure the smooth progress of medical procedures and the health and safety of patients. Utility Model Content
[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a sharpened structure for CGM guide pins.
[0004] To achieve the above objectives, the present invention provides a blade structure for a CGM guide needle, comprising a blade portion having a first cutting edge and a second cutting edge. One end of the first cutting edge intersects with one end of the second cutting edge to form a cutting line. The cutting line, the first cutting edge, and the second cutting edge form a blade tip. The cross-sectional shape of the blade tip is triangular to reduce the puncture resistance of the blade portion. A triangular face is formed between the other ends of the first cutting edge and the other ends of the second cutting edge.
[0005] Furthermore, the blade structure for the CGM guide needle also includes a needle body, with the blade located at one end of the needle body and a needle seat at the other end of the needle body for easy gripping by the user or connection to other components.
[0006] Furthermore, the needle body, needle seat, and blade are an integral structure.
[0007] Furthermore, the cross-section of the needle body is U-shaped, and the blade has a bottom surface and two side surfaces, which are respectively bent from both sides of the bottom surface.
[0008] Furthermore, the bend between the bottom surface and the side surface of the blade forms a smooth transition arc shape to assist the needle body in smoothly transitioning to the puncture site after completing the puncture action on the blade.
[0009] Furthermore, the triangular facet is coplanar with the bottom facet of the blade, and after the blade completes the puncture action, the needle body smoothly transitions to the puncture site via the triangular facet.
[0010] Furthermore, the first and second cutting edges have the same structure, and the distance between the two ends of the cutting edge line in the thickness direction of the blade bottom surface is the same as the thickness of the blade bottom surface.
[0011] Furthermore, the included angle between the bottom surface of the blade and the cutting edge surface is 110-160°.
[0012] Furthermore, the apex angle of the triangle at the tip of the blade is 30-60°.
[0013] Furthermore, the apex angle formed by the top of the blade surface is 5-30°.
[0014] The beneficial effects of this utility model are:
[0015] (1) Improve puncture accuracy and stability: The design of the U-shaped structure and triangular face of the needle body cross section enables the guide needle to guide during puncture, reduce deviation, accurately reach the target position, and the force is more uniform, which can maintain the stability of the puncture path and ensure the accuracy and reliability of the puncture operation. For example, it has obvious advantages in high-precision medical monitoring or interventional treatment.
[0016] (2) Optimize puncture and cutting performance: The triangular blade tip, the blade surface with a specific angle and the appropriate cutting line design can reduce puncture resistance, making puncture easier and smoother, and can effectively cut tissue, open up neat channels, reduce the risk of tissue damage, help the guide needle pass through different tissue layers smoothly, and improve puncture efficiency.
[0017] (3) Enhanced instrument safety and durability: The integrated structure prevents parts from falling off and separating. At the same time, the arc-shaped parts and transition parts at the connection of each structure are designed to disperse stress, extend the service life of the instrument, ensure the safety of use, reduce medical risks, and are suitable for long-term and multiple puncture operation scenarios. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the bladed structure for a CGM guide pin according to the present invention.
[0019] Figure 2 This is a side view of the present invention.
[0020] Figure 3 This is a schematic diagram of the needle body and blade of this utility model;
[0021] Figure 4 This is a schematic diagram of the needle body and needle seat of this utility model.
[0022] The reference numerals in the attached drawings include: 1. Blade; 11. First blade face; 12. Second blade face; 13. Cutting line; 14. Triangular face; 2. Needle body; 21. Blade bottom face; 22. Arc-shaped part; 3. Needle seat; 4. Circular arc part; 5. Transition part; 6. Protrusion. Detailed Implementation
[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.
[0024] Please see Figures 1 to 3 As shown, the present invention provides a sharpening structure for a CGM guide needle, comprising a blade 1, the blade 1 having a first cutting edge 11 and a second cutting edge 12, one end of the first cutting edge 11 intersecting with one end of the second cutting edge 12 to form a cutting line 13, the cutting line 13 forming a blade tip with the first cutting edge 11 and the second cutting edge 12, the blade tip having a triangular cross-sectional shape to reduce the puncture resistance of the blade 1, and a triangular surface 14 forming between the other end of the first cutting edge 11 and the other end of the second cutting edge 12.
[0025] In practical use, the cross-sectional shape of the blade tip is triangular. This shape effectively reduces the puncture resistance of the blade 1 during puncture. The triangular blade tip acts like a sharp wedge, making it easier to cut into the target tissue. Compared to blunt-tipped or other non-triangular blade tips, under the same puncture force, this triangular blade tip can penetrate tissue more smoothly, reducing compression and damage to surrounding tissues. For example, in medical puncture scenarios, just as a sharp pencil (triangular blade tip analogy) penetrates paper more easily than a blunt tool, the guide needle can reach the target position more quickly and accurately. A triangular facet 14 is formed between the other end of the first blade facet 11 and the other end of the second blade facet 12. This triangular facet 14 structure increases the stability of the blade 1. During guide needle puncture, the blade 1 needs to withstand certain lateral forces and frictional forces; the triangular facet 14 structure makes the force on the blade 1 more uniform in all directions. Analogous to the supporting structure of a bridge, the triangular facet 14 acts like a triangular support structure, enhancing the stability of the entire blade 1 and preventing deformation or displacement during puncture, thus ensuring a more accurate puncture path for the guide needle. It has a first cutting edge 11 and a second cutting edge 12, with one end intersecting to form a cutting edge line 13. This double-cutting-edge design and cutting edge line 13 improves the cutting performance of the blade 1. When the guide needle needs to create a channel in the tissue or cut some fibrous tissue, the two cutting edges work together, like the two blades of scissors. The cutting edge line 13 is the sharpest part, capable of cutting the tissue more effectively, making the guide needle advance more smoothly and reducing jamming.
[0026] Specifically, the blade structure for the CGM guide needle also includes a needle body 2, with the blade 1 located at one end of the needle body 2, and a needle seat 3 at the other end of the needle body 2 for easy gripping by the user or connection with other components.
[0027] In practical use, the needle hub 3 is designed for easy gripping by the user, conforming to ergonomic principles. This allows medical personnel to apply force more stably and accurately during CGM guide needle punctures, reducing hand fatigue and the possibility of operational errors. For example, during prolonged or repeated punctures, the appropriate needle hub 3 design helps medical personnel maintain a good operating state, thereby improving work efficiency and puncture success rate. The needle hub 3 can be connected to other components, facilitating the integration and expansion of the CGM system. It can be connected to different sensor modules, data transmission components, or fixation devices, making the entire CGM system more flexible and adaptable to different usage scenarios and patient needs. For instance, in different medical environments or for different treatment plans, connecting the corresponding adapter components through the needle hub 3 allows for personalized customization and optimization of CGM functions, improving the versatility and practicality of the guide needle within the entire CGM technology system. Because the needle hub 3 is easy to hold, operators can better control the puncture direction and force of the guide needle, reducing the risk of punctures that are too deep or deviate from the intended position due to improper operation. This reduces accidental damage to important tissues and organs in the patient's body, improves the safety of the CGM implantation process, and protects the health and safety of the patient.
[0028] Specifically, the needle body 2, needle seat 3, and blade 1 are an integral structure.
[0029] In practical use, the integrated structure significantly improves the overall strength of the needle body 2, needle hub 3, and blade 1. Because there are no connecting parts, it avoids the weak points that can occur with traditional connection methods, such as welded joints and threaded connections, which are prone to breakage or loosening. During use, especially during procedures like puncture, the guide needle needs to withstand certain external forces. The integrated structure acts like a single, sturdy material, better resisting these forces and preventing structural damage. For example, compared to structures connected by glue or simple mechanical means, the integrated structure is less likely to break under greater bending or tensile forces, just as a single metal rod is harder to break than a metal rod assembled from multiple parts. The integrated design also improves manufacturing precision. Since the needle body 2, needle hub 3, and blade 1 are manufactured as a single unit, it is easier to ensure the relative dimensional and positional accuracy between the various parts. This precision control is crucial in high-precision medical equipment or industrial applications. For example, for instruments like CGM guide needles that require high dimensional precision, the integrated structure ensures good concentricity between the axes of the blade 1 and the needle body 2, and more accurate parameters such as the connection angle between the needle hub 3 and the needle body 2, thereby improving the accuracy and reliability of the guide needle puncture. The integrated structure also reduces the risk of parts detaching or separating. In medical procedures, if the needle hub 3 separates from the needle body 2 or the blade 1 separates from the needle body 2, it may lead to serious medical accidents such as foreign bodies remaining in the body. The integrated structure ensures that the needle body 2, needle hub 3, and blade 1 are tightly integrated into a single unit, preventing parts from loosening or detaching, improving safety, and allowing medical personnel to use the guide needle with greater confidence.
[0030] Specifically, the needle body 2 has a U-shaped cross-section, and the blade 1 has a bottom blade surface 21 and two side blade surfaces, which are respectively bent from both sides of the bottom blade surface 21.
[0031] In actual use, the needle body 2 has a U-shaped cross-section. During puncture, the two sides of the U-shaped structure can play a guiding role. Just like an object running on a track, it can restrict the guide needle's movement along a specific path direction during puncture, reducing the possibility of lateral deviation, thus reaching the target position more accurately. Especially for operations that require precise access to specific parts of the body, such as high-precision medical monitoring or interventional treatments, this U-shaped structure can effectively improve the accuracy of puncture. The two side edges of the blade 1 are bent from both sides of the blade base 21. This design creates a relatively stable and suitable angle between the side edges and the blade base 21. When cutting tissue, it can break through the tissue at a good entry angle. Just as a carefully designed blade angle can cut more sharply, this bending angle makes the blade 1 more efficient in puncturing and cutting the encountered tissue, reducing puncture resistance, making the cutting process smoother, and helping the guide needle to pass smoothly through different tissue layers.
[0032] When the blade 1 punctures and cuts tissue, the two side blades and the bottom blade 21 work together to distribute the resistance and other external forces encountered during the puncture process more evenly. Imagine that multiple support points working together are more stable than a single point of force. Here, the bottom blade 21 and the two side blades act as multiple support points, making the overall force on the blade 1 more balanced. This prevents damage to the blade 1 or changes in the puncture direction due to excessive local force, ensuring a stable and continuous puncture operation. The U-shaped cross-sectional structure of the needle body 2 has certain advantages in space utilization. Its shape may facilitate integration and installation with other supporting devices or monitoring elements, better adapting to specific usage scenarios and equipment integration requirements. For example, in a CGM (Continuous Glucose Monitoring) system, when integrating sensors and other components, the U-shaped needle body 2 may reserve suitable installation space for these components without affecting the overall puncture function, making the entire system structure more compact and reasonable.
[0033] Specifically, the bend between the bottom surface 21 and the side surface of the blade forms a smooth transition arc-shaped portion 22 to assist the needle body 2 in smoothly transitioning to the puncture site after the puncture action is completed by the blade 1.
[0034] In actual use, the curved section 22 formed by the bend between the bottom surface 21 and the side surface of the blade creates a smooth transition. After the needle 2 completes the puncture action through the blade 1, this curved structure prevents sharp corners from causing additional scratches, cuts, or other damage to the surrounding tissues. It's like smoothing out sharp edges, making the transition of the needle 2 from the blade 1 to the puncture site more gentle, maximizing the protection of surrounding normal tissues and reducing the risk of unnecessary damage to local tissues caused by the puncture operation. This is especially important in puncture environments that are relatively fragile and structurally complex, such as the human body. During the puncture process, after the blade 1 completes the initial puncture, the curved section 22 helps the needle 2 smoothly enter the puncture site. It eliminates any obstacles that might arise from structural changes, making the subsequent entry action of the needle 2 continuous and smooth. Like a vehicle traveling on a track passing a curve, the smooth curve design allows the vehicle to pass smoothly without any jamming or bumps. This makes the entire puncture process more efficient, helps improve the success rate of the operation, and reduces the trouble caused by having to adjust the puncture angle or force multiple times due to uneven transition.
[0035] Due to the smooth transition provided by the arc-shaped portion 22, patients experience less discomfort during puncture. Without such a smooth transition structure, the needle body 2 might experience sudden pulling or stinging sensations when entering the puncture site from the blade 1. The arc-shaped portion 22 makes this process gentler, reducing patient pain to some extent and better meeting the requirements of humane medical procedures. This is especially suitable for puncture scenarios where minimizing patient discomfort is crucial, such as long-term, repetitive monitoring punctures. From the perspective of the instrument itself, the arc-shaped portion 22 avoids the problem of stress concentration at bends, which can easily lead to damage. During puncture, if the bend is at a right angle or sharp point, stress tends to accumulate in these areas, potentially causing cracks or breakage of the blade 1 with repeated use. The smooth transition of the arc-shaped portion 22 evenly distributes stress, extending the instrument's lifespan and ensuring the guide needle functions stably and reliably in multiple puncture procedures.
[0036] Specifically, the triangular face 14 is coplanar with the bottom face 21 of the blade, and after the blade 1 completes the puncture action, the needle body 2 smoothly transitions to the puncture site via the triangular face 14.
[0037] In actual use, the triangular facet 14 and the blade bottom facet 21 are coplanar, allowing the needle body 2 to smoothly and naturally transition to the puncture site along this coplanar area, i.e., via the triangular facet 14, after the blade 1 completes the puncture. This continuity is like a vehicle continuously traveling on a smooth road without any "bumps" or "gap" in the transmission, ensuring that the puncture operation is completed seamlessly from the entry of the blade 1 to the entry of the needle body 2 into the puncture site. This helps improve the overall efficiency of the puncture and reduces problems such as prolonged puncture time and increased operational difficulty that may result from an uneven transition. When the needle body 2 smoothly transitions through the triangular facet 14, it effectively avoids causing additional scratching, tearing, or other damage to the surrounding tissues at the puncture site. Because of the coplanar design, the movement trajectory of the needle body 2 is more regular and smooth, and there will be no sudden changes in angle or protruding structures that could damage the tissue. It's like making the "road" for the needle body 2 to enter the puncture site smoother and more even, which protects the surrounding fragile tissues to the greatest extent. This has positive significance for ensuring the normal physiological function of the puncture site afterward and reducing the patient's pain.
[0038] The triangular facet 14 plays a crucial guiding role in this transition process. Its coplanarity with the blade bottom facet 21 ensures a clearer and more stable entry direction for the needle body 2. During puncture, the operator can more precisely control the subsequent path of the needle body 2 into the puncture site, reducing the possibility of the needle body 2 deviating from the intended puncture position due to the complex structure of the transition area. This is particularly important in medical scenarios requiring extremely high puncture precision, such as accurately delivering the needle to specific microscopic areas within the body for diagnosis or treatment. This structural design helps maintain the stability of the entire needle body 2 during the puncture process. When the needle body 2 transitions from the blade 1 through the triangular facet 14, the coplanarity and smooth transition result in a more even and reasonable distribution of external forces on the needle body 2. Abnormal force conditions caused by unreasonable transition structures will not lead to shaking or bending of the needle body 2, ensuring that the needle body 2 always advances stably along the expected puncture direction. This improves the reliability of the puncture operation and also helps extend the service life of the guide needle, allowing it to better meet the needs of repeated use.
[0039] Specifically, the first cutting edge 11 and the second cutting edge 12 have the same structure, and the distance between the two ends of the cutting edge line 13 in the thickness direction of the bottom edge 21 is the same as the thickness of the bottom edge 21.
[0040] In actual use, the first cutting edge 11 and the second cutting edge 12 have the same structure, allowing both cutting edges to exert a balanced and consistent cutting effect during the cutting operation. It's like a pair of symmetrical scissors with equally sharp blades on both sides; when cutting an object, both sides work together to stably and efficiently break through tissue and other objects requiring piercing. This symmetry ensures that during piercing, regardless of the angle from which the blade 1 enters, the cutting resistance is evenly distributed by both cutting edges, making the cutting process smoother and reducing jamming or uneven cutting caused by differences in the cutting edges. The distance between the two ends of the cutting edge line 13 in the thickness direction of the blade base 21 is the same as the thickness of the blade base 21, meaning that the cutting range defined by the cutting edge line 13 is precisely matched to the thickness of the blade base 21.
[0041] This design allows for effective and precise control of the cutting depth and width of the blade 1 during cutting, preventing unintended situations such as cutting too deep or too shallow, too wide or too narrow. For example, in medical punctures, it can accurately cut a tissue channel of the appropriate size, facilitating the smooth passage of the needle 2 while avoiding unnecessary excessive tissue damage, thus improving the accuracy and effectiveness of the puncture operation. Due to the identical structure of the first and second blade surfaces 12 and the aforementioned dimensional relationship of the cutting line 13, the external force can be evenly distributed on the blade surface when the blade 1 is subjected to external force during puncture cutting. Imagine a uniformly stressed frame structure, which can more stably bear external force without easily deforming. Here, with uniform force on the blade surface, problems such as bending and breakage of the blade 1 due to excessive local force can be effectively avoided, ensuring the structural integrity of the blade 1 during the puncture process. This allows it to continuously and stably complete the cutting task and also helps to extend the service life of the blade 1 and even the entire guide needle.
[0042] Specifically, the angle between the bottom surface 21 of the blade and the blade face is 110-160°.
[0043] In practical use, when the angle between the blade base 21 and the cutting edge is within this range, the blade can enter the tissue at a suitable angle during the initial stage of puncture. This angle is neither too sharp (less than 90° may cause the blade to break easily) nor too blunt (close to 180° will greatly increase puncture resistance). Like digging soil with a shovel at a suitable angle, this angle allows the blade to more easily break through the tissue, reducing the external force required during puncture and making the puncture operation easier and smoother. For example, in medical puncture scenarios, it helps reduce the force required by medical personnel, improving the convenience and efficiency of puncture. During puncture, this angle range helps control the puncture depth. Compared to a smaller angle, an angle of 110-160° prevents the blade from penetrating too deeply, avoiding the risk of damage to deeper tissues due to excessive puncture. At the same time, this angle also prevents the puncture depth from being too shallow, ensuring smooth penetration of the target tissue and allowing the needle 2 to reach the predetermined position, meeting the basic requirements of the puncture operation. This angle range gives the blade excellent cutting performance when cutting tissue fibers.
[0044] When the angle is appropriate, the cutting force applied by the blade to the tissue can act more effectively on the tissue fibers, much like cutting a rope with a knife at the right angle. This allows for a cleaner and more efficient cut, reducing tissue tearing and irregular fractures. This helps to create a relatively neat tissue channel during puncture, facilitating the subsequent passage of the needle 2, and reducing the probability of adverse consequences such as local inflammatory reactions caused by tissue tearing. An angle of 110-160° between the blade base 21 and the blade face helps to improve the structural stability of the blade 1. This angle range allows the blade to better distribute the force to various parts of the blade 1 when subjected to puncture and cutting forces, avoiding excessive stress concentration at a single point or area. For example, compared to angles that are too small or too large, this moderate angle can prevent local deformation or breakage of the blade under force, ensuring the integrity of the blade 1 throughout the puncture and cutting process, thereby improving the durability and reliability of the instrument.
[0045] Specifically, the apex angle of the triangle at the tip of the blade is 30-60°.
[0046] In practical use, when the apex angle of the blade tip is within the range of 30-60°, the blade tip can more easily pierce the target object. Just as a sharp needle can more easily penetrate fabric, a smaller apex angle allows the blade tip to more smoothly cut into tissue or other materials that need to be pierced. For example, in the medical field, if piercing human tissue, a blade tip within this angle range can reduce the pressure required for the initial puncture. Because a smaller apex angle allows the applied force to be more concentrated over a smaller area during puncture, according to the pressure formula, under a constant pressure, the smaller the area, the greater the pressure, making it easier to pierce the tissue. Such an apex angle helps improve the accuracy of puncture. An apex angle of 30-60° provides better guidance for the blade tip during puncture. Compared to a larger apex angle, it is less prone to deviation during puncture. For example, in delicate medical procedures, such as inserting a guide needle into a specific blood vessel or interstitial space, this angled tip can more accurately advance along the predetermined path, much like a dart with a precise arrowhead, making it more likely to hit the target location and reducing puncture deviation caused by the shape of the tip. A suitable apex angle can reduce damage to the tissues surrounding the puncture path.
[0047] If the apex angle is too small, the blade tip, while sharp, may penetrate too deeply or break easily, causing additional damage to surrounding tissues. If the apex angle is too large, greater force is required during puncture, and tissue tearing may occur due to uneven entry. A 30-60° apex angle ensures puncture efficiency while gently opening the tissue channel, reducing tissue tearing and unnecessary damage, which is beneficial for postoperative recovery and maintaining normal physiological function after puncture. Considering the durability of blade 1, this angle range allows the blade tip to maintain good integrity during multiple punctures. It avoids wear or breakage due to an overly sharp apex angle, and also prevents deformation due to excessive pressure during puncture due to an overly blunt apex angle. Like a well-structured tool head, it can withstand multiple operations within a reasonable range of use, extending the lifespan of blade 1 and reducing the cost and inconvenience of frequent guide needle replacements.
[0048] Specifically, the apex angle formed by the top of the blade surface is 5-30°.
[0049] In practical use, the blade is extremely sharp when the apex angle formed by the tip of the cutting edge is within the range of 5-30°. A smaller apex angle acts like an extremely sharp wedge, concentrating force on a very small area when cutting tissue or other materials. According to the principle of pressure, under the same pressure, the smaller the apex angle, the smaller the contact area between the blade and the object being cut, resulting in greater pressure and making it easier to penetrate the target object. For example, in medical puncture procedures, this sharp apex angle can more effectively cut through tough tissues such as fascia, allowing the guide needle to pass smoothly. This angle range is beneficial for precision cutting. Compared to blades with larger apex angles, a 5-30° apex angle can more accurately cut fine tissue fibers or other delicate structures. Like a precision scalpel, it can accurately cut through obstacles in the puncture path in complex tissue environments without causing excessive damage to surrounding tissue, helping to maintain the integrity of the tissue around the puncture site. This small apex angle design at the tip of the cutting edge can improve the initial efficiency of puncture.
[0050] At the initial stage of puncture, the sharp apex allows for rapid penetration into the tissue surface. Because it easily breaks through the outer layer of tissue defense, the entire puncture process can be initiated more quickly. For example, in medical scenarios requiring rapid puncture, such as emergency care or urgent clinical testing, this design saves time for subsequent puncture steps, allowing the needle body 2 to reach the intended location more promptly. A smaller apex angle on the blade tip helps reduce tissue damage. This is because it allows for more precise tissue cutting, avoiding excessive compression and tearing of the tissue during puncture due to an excessively large apex angle. In human tissue puncture, excessive tissue damage can lead to complications such as inflammatory reactions and bleeding. An apex angle of 5-30° is relatively "gentler" when cutting tissue, minimizing these adverse consequences and promoting patient recovery and health. From the perspective of overall instrument stability, this apex angle allows the force on the blade to be distributed more evenly on both sides of the blade during cutting. Although the apex angle is sharp, the limited angle range prevents the force from concentrating at a single point on the blade tip due to excessive sharpness. This prevents the blade from bending or breaking due to excessive local stress during the cutting process, thereby improving the stability of the blade and ensuring the reliability of the guide needle in multiple cutting and puncture operations.
[0051] In this embodiment, an arc-shaped portion 4 is formed between the needle seat 3 and the bottom surface of the blade 21 to connect the two.
[0052] In actual use, the presence of the arc-shaped portion 4 makes the contact between the hand and the needle hub 3 more natural and comfortable for medical personnel when holding the needle hub 3, reducing discomfort caused by sharp edges or abrupt turns at the connection. This ergonomic transition design allows operators to hold the guide needle more comfortably and securely, facilitating better force application and precise control of the puncture direction and force. Especially during prolonged puncture operations, it effectively reduces hand fatigue and improves operational efficiency and accuracy. The arc-shaped portion 4 provides a smooth connection between the needle hub 3 and the blade bottom surface 21, making it easier for operators to perceive the overall state of the needle body 2 during puncture. The force transmission from the needle hub 3 to the blade 1 is smoother, helping to guide the puncture action smoothly in the expected direction and reducing operational jamming or directional deviations caused by poor structural connection, making the entire puncture operation more convenient and efficient.
[0053] During puncture, the arc-shaped portion 4 acts as a buffer and evenly distributes stress as force is transmitted from the needle hub 3 to the blade 1. It prevents force concentration due to abrupt changes at the connection point, allowing stress to be distributed more smoothly and evenly to the blade 1. This ensures uniform force distribution on the blade 1 during puncture, helps maintain the stability of the puncture path, and prevents deformation or damage to the blade 1 due to excessive localized stress, thus improving the overall stability and reliability of the guide needle during puncture operations. As the transition section 5 connecting the needle hub 3 and the blade bottom surface 21, the arc-shaped portion 4 enhances the structural strength of this crucial part of the guide needle through its reasonable arc structure. It compensates for potential structural weaknesses caused by right-angle connections, making the connection between the needle hub 3 and the blade bottom surface 21 more secure. This reduces the possibility of loosening or disengagement during repeated use or under external force, extending the lifespan of the guide needle and ensuring its long-term stable service in CGM sensor implantation.
[0054] In this embodiment, both the first cutting edge 11 and the second cutting edge 12 extend from the cutting line to the arc-shaped portion 22. A transition portion 5 is formed between the first cutting edge 11, the second cutting edge 12 and the arc-shaped portion 22. The transition portion 5 is arc-shaped from the cutting edge to the arc-shaped portion 22.
[0055] In actual use, both the first cutting edge 11 and the second cutting edge 12 extend to the arc-shaped portion 22, and they are connected to the arc-shaped portion 22 via the arc-shaped transition portion 5. This ensures a seamless transition from the cutting action of the blade 1 to the needle body 2 entering the puncture site via the arc-shaped portion 22. During puncture, after the blade 1 cuts the tissue, it can smoothly transition to the arc-shaped portion 22 via these arc-shaped transition portions 5 to continue penetrating deeper, avoiding any abruptness or blockage caused by structural changes. This ensures a smooth and efficient puncture operation, reducing operation time and improving the work efficiency of medical staff. The arc-shaped transition portion 5 can better disperse and guide the force generated during puncture. When the blade 1 is subjected to force, the force can be evenly transmitted to the arc-shaped portion 22 and the entire needle body 2 along the arc-shaped transition portion 5, avoiding force concentration at the structural junction and reducing the possibility of damage to local tissues due to excessive force. This optimized force transmission path helps maintain force balance during puncture, allowing the needle body 2 to enter the puncture site more stably, improving puncture accuracy, and ensuring that the CGM sensor can be accurately implanted into the predetermined position.
[0056] Because the transition section 5 is arc-shaped, it can more effectively coordinate the force distribution between the first cutting edge 11, the second cutting edge 12, and the arc-shaped section 22 in all directions, allowing the entire blade section 1 and related connecting areas to form a uniformly stressed and synergistic whole during puncture. Whether dealing with resistance in the vertical puncture direction or lateral friction, this reasonable force dispersion and transmission mechanism maintains good structural stability, preventing deformation or displacement of the blade section 1 or needle body 2 that could affect the puncture effect. The rounded shape of the arc-shaped transition section 5 minimizes scratching and compression damage to surrounding tissues during puncture. Compared to right-angle transitions or rigid connections, it is gentler when entering tissue, reducing the degree of mechanical damage to the tissue, promoting rapid wound healing, and alleviating pain and discomfort for the patient during puncture. This demonstrates effective protection of the puncture site and surrounding tissues, conforming to the principle of minimizing trauma in medical procedures.
[0057] In this embodiment, the needle body 2 is provided with scale markings along its own length, with a scale accuracy of 0.5mm, so that the user can accurately control the puncture depth.
[0058] In practical use, the graduated markings allow users to intuitively and accurately determine the puncture depth. The fine 0.5mm precision of the markings provides strong support for scenarios requiring high-precision puncture procedures. For example, in some medical interventions or diagnostic punctures, different conditions may require the guide needle to reach specific depths within the body, such as puncturing to a position precisely 15.5mm or 20mm from the body surface. The markings allow users to precisely control the depth, avoiding damage to deep, important tissues due to excessive puncture or failure to achieve the desired detection or treatment effect due to insufficient puncture, greatly improving the accuracy of the puncture procedure. With clear and precise markings, users do not need to rely on experience to roughly estimate the puncture depth. This design reduces the difficulty of operation, especially for less experienced operators. They can quickly adjust the puncture depth according to the required value. Compared to situations without markings and requiring repeated attempts to determine the puncture depth, this effectively saves operation time, making the entire puncture process more efficient and smooth, and improving work efficiency.
[0059] In the medical field, precise control of puncture depth is crucial for ensuring patient safety. Accurately controlling puncture depth through graduated markings can prevent a series of complications caused by uncontrolled puncture depth, such as bleeding from punctured blood vessels or serious organ damage. In some surgeries or monitoring procedures requiring extremely high precision, this design acts as a "safety net," minimizing the medical risks associated with inappropriate puncture depth and protecting patient health and safety. For healthcare professionals learning puncture procedures, the graduated needle body 2 is an excellent teaching tool. They can clearly see the changes in puncture depth, standardize their techniques according to the markings, better understand and master the accurate puncture depth required in different situations, and help quickly improve their skills, allowing novices to adapt to actual clinical puncture work more rapidly.
[0060] In this embodiment, the blade 1, needle body 2, and needle seat 3 are all made of medical stainless steel.
[0061] In practical use, medical-grade stainless steel exhibits excellent biocompatibility, meaning that it is less likely to trigger a strong rejection reaction from the human immune system after entering the body. When in contact with human tissue, it can coexist relatively harmoniously, reducing the probability of adverse reactions such as inflammation and allergies. For example, in medical procedures involving prolonged placement within the body (such as certain long-term monitoring punctures), these components made of medical-grade stainless steel will not cause adverse stimulation to surrounding tissues due to the material itself, ensuring the patient's safety and comfort. The internal environment of the human body is complex, containing various bodily fluids such as blood and tissue fluid, and varying pH levels. Medical-grade stainless steel effectively resists the corrosive effects of these bodily fluids, maintaining its structural integrity and performance stability over a long period. Unlike some ordinary metals, it will not rust or corrode quickly after contact with bodily fluids, thus affecting the normal use of the guide needle. This ensures that the blade 1, needle body 2, and needle hub 3 can reliably perform their functions, whether for short-term or long-term use. Medical stainless steel has high strength and can withstand the external forces required during puncture. For example, when penetrating tough human tissue, the needle body 2 will not bend or break easily, and the blade 1 can also maintain good cutting performance and keep its sharpness.
[0062] Simultaneously, it possesses a certain degree of toughness. When subjected to a certain degree of external impact or bending, it can cushion these forces through its own deformation, preventing sudden brittle fracture. This makes the entire guide needle structure more durable, capable of withstanding repeated use, and extending the product's lifespan. In medical environments, strict sterilization requirements are essential. Medical-grade stainless steel can withstand various common sterilization methods, such as high-temperature steam sterilization and chemical disinfectant immersion sterilization, and can maintain its performance and structure unaffected after sterilization. This ensures that the guide needle is in a sterile and safe state before each use, reducing the risk of cross-infection and meeting medical and health standards.
[0063] In this embodiment, a protrusion 6 is formed on the needle body 2 near the needle seat 3.
[0064] In practical use, when medical staff use the CGM guide needle, they need to hold the needle body 2 stably. The protrusion 6 near the needle hub 3 significantly increases the friction between the fingers and the needle body 2. Especially in complex operating environments, such as when the medical staff's hands may have some disinfectant on them from sterilization procedures, or when their palms sweat during tense operations, the protrusion 6 can effectively prevent the guide needle from slipping out of their hands. This is similar to having anti-slip textures on the handles of some tools, ensuring the stability and accuracy of the operation, allowing medical staff to perform punctures and other procedures more precisely. The protrusion 6 can also serve as a visual and tactile marker. During operation, medical staff can quickly determine the orientation of the needle body 2 by touching or observing the protrusion 6, especially during the insertion of the guide needle into the body, where accurate orientation is crucial. For example, in situations requiring insertion at a specific angle, the protrusion 6 can help medical staff better control the insertion direction, reduce puncture errors caused by incorrect orientation, and improve the success rate of the operation. If the CGM guide needle needs to be connected to other medical devices (such as the sensor portion of a blood glucose monitoring device), the protrusion 6 can serve as a connection aid. It can mate with corresponding slots, recesses, or fixing devices on the connecting device. For example, the interface of the connecting device may have a corresponding recessed portion; when the guide needle is inserted, the protrusion 6 fits perfectly into it, making the connection between the guide needle and the connecting device tighter and more secure. This secure connection prevents accidental separation of the guide needle from the connecting device during use due to patient movement or minor external impacts, ensuring the continuity and accuracy of the blood glucose monitoring system. The protrusion 6 also acts as a limit. During guide needle insertion, when the protrusion 6 contacts the skin or the outer boundary of the insertion site, it alerts medical personnel that the appropriate insertion depth has been reached, preventing unnecessary harm to the patient due to over-insertion. This is similar to the limiting device on some injection needles, improving operational safety.
[0065] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of this utility model. The content of this specification should not be construed as a limitation of this utility model.
Claims
1. A sharpened structure for a CGM guide pin, characterized in that: It includes a blade (1), which has a first cutting edge (11) and a second cutting edge (12). One end of the first cutting edge (11) and one end of the second cutting edge (12) intersect to form a cutting edge line (13). The cutting edge line (13) and the first cutting edge (11) and the second cutting edge (12) form a blade tip. The cross-sectional shape of the blade tip is triangular to reduce the piercing resistance of the blade (1). A triangular face (14) is formed between the other end of the first cutting edge (11) and the other end of the second cutting edge (12).
2. The sharpening structure for a CGM guide pin according to claim 1, characterized in that: The blade structure for the CGM guide needle also includes a needle body (2), with the blade (1) located at one end of the needle body (2) and a needle seat (3) at the other end of the needle body (2) for easy gripping by the user or connection with other components.
3. The sharpening structure for a CGM guide pin according to claim 2, characterized in that: The needle body (2), needle seat (3), and blade (1) are an integral structure.
4. The sharpening structure for a CGM guide pin according to claim 2, characterized in that: The needle body (2) has a U-shaped cross section and a blade (1) with a bottom surface (21) and two side surfaces, which are formed by bending from both sides of the bottom surface (21).
5. The sharpening structure for a CGM guide pin according to claim 4, characterized in that: The bend between the bottom surface (21) and the side surface of the blade forms a smooth transition arc-shaped part (22) to assist the needle body (2) in smoothly transitioning to the puncture site after the puncture action is completed on the blade (1).
6. The sharpening structure for a CGM guide pin according to claim 4, characterized in that: The triangular face (14) is coplanar with the blade bottom face (21). After the blade (1) completes the puncture action, the needle body (2) smoothly transitions to the puncture site via the triangular face (14).
7. The sharpening structure for a CGM guide pin according to claim 4, characterized in that: The first cutting edge (11) and the second cutting edge (12) have the same structure, and the distance between the two ends of the cutting edge line (13) in the thickness direction of the bottom edge (21) is the same as the thickness of the bottom edge (21).
8. The sharpening structure for a CGM guide pin according to claim 4, characterized in that: The angle between the bottom surface (21) of the blade and the blade surface is 110-160°.
9. The sharpening structure for a CGM guide pin according to claim 1, characterized in that: The apex angle of the triangle at the tip of the blade is 30-60°.
10. The sharpening structure for a CGM guide pin according to claim 1, characterized in that: The apex angle formed by the top of the blade surface is 5-30°.