Blunt trocar for heparin cap
By designing a slanted cannula with a beveled cut and a protective structure, the problems of high puncture resistance and direct contact were solved, achieving convenient operation and safe use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG WEIGAO GROUP MEDICAL POLYMER
- Filing Date
- 2025-07-07
- Publication Date
- 2026-05-12
AI Technical Summary
Existing blunt cannula needles offer significant resistance when puncturing heparin caps, easily damaging the cap structure, increasing the risk of infection, and posing a high risk of direct contact between healthcare workers and the needle site.
A cannula needle with a beveled opening structure and a protective structure is designed, including a beveled needle opening and protective parts covering both sides of the needle opening. The connector is provided with external threads to facilitate connection with a needle holder or syringe. The whole structure adopts a one-piece molding structure.
It reduces puncture resistance, decreases the workload of medical staff, avoids direct contact with the needle site, protects the heparin cap structure, and reduces the risk of infection.
Smart Images
Figure CN224220510U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and more specifically, to a blunt cannula needle for heparin caps. Background Technology
[0002] Heparin caps, as a key component of intravenous / arterial infusion systems, play an extremely important role in modern medical systems.
[0003] In heparin cap procedures, syringes or devices with intravenous needles have traditionally been used for puncture to achieve functions such as infusion, blood transfusion, and blood collection. These traditional devices have been used in clinical practice for a long time and possess a certain degree of stability and reliability. In addition, some manufacturers have introduced blunt cannulas to address some of the problems associated with traditional puncture devices. These cannulas, with their special blunt design, reduce the risk of healthcare workers being directly exposed to the needle site to a certain extent.
[0004] However, while existing blunt cannulas have improved the reduction of exposure risk, their flush-tipped needles result in a larger contact area with the heparin cap during insertion, leading to significantly increased puncture resistance. This not only makes the procedure extremely difficult for healthcare workers but also increases the risk of damaging the heparin cap's structure due to excessive force, thereby allowing external viruses and bacteria to invade and increasing the possibility of infection.
[0005] In summary, how to reduce the difficulty of blunt cannula puncture and avoid direct contact with the needle site during use is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0006] In view of this, the purpose of this utility model is to provide a blunt cannula needle for heparin caps, which effectively reduces the difficulty of blunt cannula puncture and avoids direct contact with the needle site during use.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A blunt cannula for heparin caps, comprising:
[0009] A cannula body, one end of which is provided with a needle opening, the needle opening being a beveled structure;
[0010] A protective structure is provided on the main body of the cannula, and the protective structure has at least a protective portion covering the opposite sides of the needle opening.
[0011] Preferably, the end of the cannula body opposite to the needle port is provided with a connector, and the connector is provided with a connecting structure to allow the connector to be connected to a needle holder or syringe.
[0012] Preferably, the connection structure includes an external thread disposed on the outer shaft of the connector.
[0013] Preferably, the cannula body, the needle port, and the connector are integrally formed.
[0014] Preferably, the two protective parts arranged opposite to each other are disposed on both sides of the sleeve body through the mounting part, and there is a buffer space between the two protective parts and the sleeve body. When the protective parts are pressed, they deflect toward the sleeve body.
[0015] Preferably, the mounting part and the protective part are N-shaped structures as a whole, and each of the two protective parts is provided with a receiving part for accommodating the needle opening on the side near the sleeve body.
[0016] Preferably, the material of the protective structure is the same as the material of the sleeve body, or the material of the protective structure is medical silicone rubber.
[0017] Preferably, the tilt angle of the bevel structure is in the range of 30°-60°.
[0018] Preferably, each of the protective parts has an anti-slip structure on the side surface opposite to the sleeve body.
[0019] Preferably, the anti-slip structure includes a plurality of raised stripes disposed on the surface of the protective part, wherein the plurality of raised stripes are distributed in parallel and / or intersectingly.
[0020] The blunt cannula needle for heparin cap provided by this utility model has a beveled needle tip structure, which reduces resistance during puncture, makes the operation more convenient, reduces the workload of medical staff, and avoids damage to the heparin cap structure; the protective part of the protective structure is placed on both sides of the needle tip to avoid direct contact with the needle tip. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the blunt cannula needle in this embodiment.
[0023] The reference numerals in the figures include:
[0024] 1. Sleeve body; 2. Needle port; 3. Connector; 4. Protective structure; 41. Mounting part; 42. Protective part; 43. Receiving part. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar words used in this utility model do not indicate any order, quantity, or importance. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. An embodiment of this application discloses a blunt cannula needle for heparin caps.
[0027] The core of this invention is to provide a blunt cannula needle for heparin caps.
[0028] Please refer to Figure 1 .
[0029] The blunt cannula needle for heparin cap provided by this utility model includes a cannula body 1 and a protective structure 4. One end of the cannula body 1 is provided with a needle opening 2, which is a beveled structure. The protective structure 4 is disposed on the cannula body 1, and the protective structure 4 has at least protective portions 42 covering the opposite sides of the needle opening 2.
[0030] Specifically, the needle port 2 at one end of the cannula body 1 has an oblique structure. Compared with the traditional flush structure, this oblique structure can effectively reduce puncture resistance when puncturing the heparin cap, making the operation more convenient and reducing the workload of medical staff. At the same time, the protective structure 4 is set on the cannula body 1, and its protective part 42 covers the opposite sides of the needle port 2, avoiding direct exposure of the needle. During use, medical staff can clamp the entire cannula needle by pinching the two protective parts 42, thereby preventing medical staff from directly contacting the needle and eliminating the risk of exposure to medical staff.
[0031] Compared to the traditional flush design, the beveled incision significantly reduces resistance during puncture. The beveled design effectively reduces resistance while maintaining bluntness, preventing harm to medical personnel.
[0032] The cannula body 1 is the basic supporting part of the entire cannula needle. The cannula body is generally slender and tubular in shape to accommodate the internal space of the heparin cap and the needs of the puncture operation. Its length and diameter are rationally designed according to the actual application scenario to achieve the best performance.
[0033] The aforementioned blunt cannula needle for heparin caps can achieve puncture function, ensure safety of use, and facilitate subsequent connection to other devices. It effectively reduces the difficulty of blunt cannula puncture and avoids direct contact with the needle port 2 during use.
[0034] The blunt cannula for heparin caps provided by this utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.
[0035] In one specific implementation, reference is made to... Figure 1 The end of the cannula body 1 facing away from the needle port 2 is provided with a connector 3, and a connecting structure is provided on the connector 3 so that the connector 3 can be connected to the needle holder or syringe.
[0036] Specifically, the cannula body 1 consists of three parts: a connecting section, a transition section, and a needle section. The needle port 2 is located in the needle section of the cannula body 1, and the connector 3 is located in the connecting section of the cannula body 1 (i.e., the end of the cannula body 1 away from the needle port 2). A connecting structure for connecting a needle holder or a syringe is provided on the connector 3 to facilitate quick connection between the needle holder or syringe and the connector 3.
[0037] During use, hold the protective part 42 and use the beveled structure to puncture the heparin cap. After puncture, the needle holder can be connected to the connector 3, or a syringe can be directly connected. For example, when collecting blood from the heparin cap of an indwelling needle, central venous catheter, or blood pressure sensor pressure line, simply insert a blunt cannula into the heparin cap, then connect the needle holder to the connector 3, and then connect a negative pressure blood collection tube to the needle holder. This allows for needle-free and exposure-free blood collection throughout the entire process.
[0038] Furthermore, the connection structure includes an external thread disposed on the outer shaft of the connector 3.
[0039] Specifically, the connection structure includes an external thread on the outer shaft of connector 3. The external thread design allows connector 3 to connect tightly with needle holders or syringes that have internal threads, ensuring a tight seal and stability of fluid transfer. The pitch and thread profile of the external thread also need to be designed according to standards to ensure compatibility with various adapters. The material of connector 3 can be the same as the sleeve body, or it can be made of other materials with good connection performance.
[0040] Based on any of the above embodiments, refer to Figure 1The cannula body 1, needle 2, and connector 3 are integrally molded. This integrally molded structure can improve the structural strength and stability of the entire cannula needle, reduce errors and loosening risks caused by assembly, and also facilitate production and quality control.
[0041] Based on any of the above embodiments, refer to Figure 1 Two protective parts 42 are arranged opposite to each other and are mounted on both sides of the sleeve body 1 via mounting parts 41. There is a buffer space between the two protective parts 42 and the sleeve body 1. When the protective parts 42 are pressed, they deflect toward the sleeve body 1.
[0042] Specifically, two opposing protective parts 42 are arranged along the length of the cannula body 1. The same section of each protective part 42, away from the needle opening 2, is connected to the cannula body 1 via a mounting part 41, thus making the cannula needle and the protective structure 4 an integral unit. During use, the protective parts 42 deflect towards the cannula body 1 under pressure, facilitating clamping by medical personnel. Simultaneously, the presence of a buffer space ensures that medical personnel do not directly pinch the needle opening 2, thus not affecting the normal use of the cannula needle.
[0043] Furthermore, the mounting part 41 and the protection part 42 are N-shaped structures as a whole, and each of the two protection parts 42 is provided with a receiving part 43 for accommodating the needle port 2 on the side near the sleeve body 1.
[0044] Specifically, the mounting part 41 and the protective part 42 have an overall N-shaped structure, similar to a fork on the cannula body 1. During use, there is a gap between the two protective parts 42, and the connection between the cannula body 1 and the heparin cap can be located at this gap, thereby enabling the puncture of the heparin cap. The cross-section of both the mounting part 41 and the protective part 42 is a semi-circular arc structure, and the receiving part 43 is the space enclosed by this arc structure. The receiving part 43 plays a role in avoiding interference between the cannula body 1 and the heparin cap during the clamping process, thus ensuring that the puncture process is not affected by the clamping force.
[0045] Optionally, the material of the protective structure 4 is the same as that of the cannula body 1, or the material of the protective structure 4 is medical-grade silicone rubber. When the material of the protective structure 4 is the same as that of the cannula body 1, the overall manufacturing process of the cannula is simple, and the rigid material is easier to withstand force during puncture. When the material of the protective structure 4 is medical-grade silicone rubber, it has good elasticity, flexibility, and biocompatibility, and can provide reliable protection for the needle site.
[0046] Based on any of the above embodiments, the tilt angle of the oblique opening structure ranges from 30° to 60°.
[0047] Specifically, the beveled structure has an inclination angle ranging from 30° to 60°. Within this range, the puncture effect is optimal, effectively reducing resistance when inserting the heparin cap, making the procedure easier for healthcare workers, reducing workload, and preventing damage to the heparin cap structure due to excessive force, thus lowering the risk of infection from viral and bacterial invasion. For example, when the inclination angle is 45°, the puncture resistance is significantly reduced, making the procedure smoother. The beveled structure can also have different edge treatments; for example, a rounded edge can further reduce damage to the heparin cap.
[0048] Based on any of the above embodiments, each protective part 42 has an anti-slip structure on the side surface facing away from the sleeve body 1.
[0049] Specifically, the anti-slip structure is set on the side surface of the protective part 42 away from the main body of the cannula. When medical staff operate the blunt cannula to puncture the heparin cap, their hands come into contact with the protective part 42 with the anti-slip structure. The anti-slip structure increases the friction between the hand and the protective part, so that when medical staff press the protective part to perform the puncture operation, they can apply force more stably and are less likely to slip, thus facilitating the smooth puncture operation.
[0050] Furthermore, the anti-slip structure includes multiple raised stripes disposed on the surface of the protective part 42, the multiple raised stripes being distributed in parallel and / or intersecting.
[0051] Specifically, the anti-slip structure consists of multiple raised stripes on the surface of the protective part 42. These raised stripes are distributed in parallel, intersecting, or a combination of both. This distribution increases the friction between the hand and the protective part 42 when operating a blunt cannula, allowing medical personnel to grip the cannula more stably for puncture operations, thus improving the convenience and accuracy of the procedure. The anti-slip structure design increases the friction when medical personnel grip the protective part 42, preventing hand slippage during operation and improving accuracy and safety. For example, when medical personnel hold the protective part for puncture operations, the raised stripes provide a better feel, making the operation more stable.
[0052] The implementation principle of the blunt cannula for heparin caps in this embodiment is as follows: The blunt cannula for heparin caps in this embodiment overcomes many shortcomings of the prior art through its unique beveled needle tip and protective structure design. The beveled tip significantly reduces resistance during puncture, making the operation easier and more convenient for medical personnel, reducing operation time and workload. Simultaneously, the protective structure effectively prevents direct exposure of the needle tip and avoids direct contact between medical personnel and the needle tip. The external thread design of the connector facilitates connection with a needle holder or syringe, ensuring smooth operation of the entire infusion, blood collection, and other procedures. The one-piece molded structure improves the overall performance and stability of the cannula. The anti-slip structure further enhances the safety and accuracy of the operation.
[0053] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0054] The above provides a detailed description of the blunt cannula needle for heparin caps provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.
Claims
1. A blunt cannula for heparin caps, characterized in that, include: The sleeve body (1) has a needle port (2) at one end, and the needle port (2) is a beveled structure; A protective structure (4) is provided on the sleeve body (1), and the protective structure (4) has at least a protective part (42) covering the opposite sides of the needle opening (2).
2. The blunt cannula for heparin caps according to claim 1, characterized in that, The cannula body (1) is provided with a connector (3) at one end away from the needle port (2), and a connection structure is provided on the connector (3) so that the connector (3) can be connected to the needle holder or syringe.
3. The blunt cannula for heparin caps according to claim 2, characterized in that, The connection structure includes an external thread disposed on the outer shaft of the connector (3).
4. The blunt cannula for heparin caps according to claim 2, characterized in that, The sleeve body (1), the needle port (2), and the connector (3) are integrally formed.
5. The blunt cannula for heparin caps according to claim 1, characterized in that, The two protective parts (42) arranged opposite to each other are provided on both sides of the sleeve body (1) by the mounting part (41). There is a buffer space between the two protective parts (42) and the sleeve body (1). The protective parts (42) deflect towards the sleeve body (1) under pressure.
6. The blunt cannula for heparin caps according to claim 5, characterized in that, The mounting part (41) and the protection part (42) are N-shaped structures. Each of the two protection parts (42) has a receiving part (43) for accommodating the needle port (2) on the side near the sleeve body (1).
7. The blunt cannula for heparin caps according to claim 1, characterized in that, The material of the protective structure (4) is the same as that of the sleeve body (1) or the material of the protective structure (4) is medical silicone rubber.
8. The blunt cannula for heparin caps according to any one of claims 1-7, characterized in that, The tilt angle of the beveled structure ranges from 30° to 60°.
9. The blunt cannula for heparin caps according to claim 8, characterized in that, Each of the protective parts (42) has an anti-slip structure on the side surface facing away from the sleeve body (1).
10. The blunt cannula for heparin caps according to claim 9, characterized in that, The anti-slip structure includes a plurality of raised stripes disposed on the surface of the protective part (42), and the plurality of raised stripes are distributed in parallel and / or intersecting.