Needle for injection against penetration into blood vessels and urethral injection device
By designing an injection needle with a central axis needle tip and a drainage hole on the side wall, the problem of damage and bleeding when existing injection needles pierce the urethral wall has been solved, achieving an injection effect with less trauma and faster recovery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU QIPU BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-06-23
Smart Images
Figure CN224387518U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of injection needle technology, and more specifically, to an injection needle and urethral injection device that prevents puncture into blood vessels. Background Technology
[0002] In cases of bladder disease or urethral relaxation, some treatment regimens require the administration of injectable medications or solutions. These injection needles are used via cystoscopy to deliver injections into the urethra, bladder neck, and bladder wall. However, most existing injection needles have beveled tips. When penetrating the urethral wall, the wedge-shaped effect can result in a larger wound and easily introduce tissue into the needle tract. Furthermore, the urethral tissue has numerous capillaries, making it prone to capillary bleeding. Utility Model Content
[0003] This application provides an injection needle and urethral injection device that prevents puncture into blood vessels. It can be used in conjunction with the sheath of a cystoscope to insert into the urethra to inject into the urethral wall, and can reduce damage to the urethral wall and prevent puncture into blood vessels and bleeding.
[0004] This application is implemented as follows:
[0005] In a first aspect, this application provides an injection needle designed to prevent insertion into a blood vessel, comprising:
[0006] An injection needle, wherein the needle tip is located on the central axis of the injection needle, the outer surface of the injection needle is on the same rotational surface, the injection needle has an injection channel for the injection liquid to pass through, and the side wall of the injection needle has a drainage hole communicating with the injection channel.
[0007] A connecting tube, wherein the injection needle is fixedly installed at one end of the connecting tube, and the injection channel communicates with the connecting tube; and,
[0008] A connecting connector is fixedly connected to the other end of the connecting tube and is used to connect to the syringe.
[0009] In one possible implementation, the injection channel includes a main channel extending along the axial direction of the injection needle and a connecting section that connects to the drainage hole, the sidewall of the connecting section being arc-shaped.
[0010] In one possible implementation, the injection needle includes a cylindrical section and a tip section, the outer surface of the tip section being smoothly connected to the outer surface of the cylindrical section, and the outer surface of the tip section being an outwardly convex arc shape.
[0011] In one possible implementation, the connecting tube is configured to bend 5 to 30 degrees without creases, and the connecting tube is a plastic tube.
[0012] In one possible implementation, the connecting pipe is a polyethylene pipe.
[0013] In one possible implementation, the connecting pipe has a length of 5-60 cm and an outer diameter of 1-5 mm.
[0014] In one possible implementation, the connecting pipe has a length of 30-50 cm and an outer diameter of 3-5 mm.
[0015] In one possible implementation, the length of the injection needle is 0.5~2cm.
[0016] In one possible implementation, the outer wall of the connector is provided with a fixing plate, which extends outward 1-2 cm along the outer wall of the connector.
[0017] Secondly, this application provides a urethral injection device, including a syringe and the aforementioned anti-puncture-into-blood-vessel injection needle, wherein the connecting connector of the anti-puncture-into-blood-vessel injection needle is connected to the syringe.
[0018] The embodiments of this application have at least the following beneficial effects:
[0019] The puncture-proof injection needle of this application, after being connected to a syringe, is inserted into the operating channel of a cystoscope or other endoscope mounting body. Because the puncture-proof injection needle has a connecting tube, it facilitates side entry into the operating channel. Furthermore, the needle tip is located on the central axis of the injection needle, and a drainage hole is provided on the side wall of the needle. Since the needle tip has no holes, it punctures the surface of the urethral wall through the needle tip. When the injection needle is inserted into the urethra, it avoids the wedge-shaped effect that damages the urethral wall caused by traditional injection needles, and the wound heals more easily after the needle is withdrawn. Moreover, the outer surface of the injection needle is on the same rotational curved surface, and the drainage hole is located on the side wall of the injection needle. With only a single point, the needle tip is less likely to puncture a blood vessel and cause bleeding, and it also reduces the risk of puncture wounds to the urethral wall from the outer surface of the injection needle. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of the injection needle for preventing puncture into blood vessels according to an embodiment of this application;
[0022] Figure 2 This is a schematic diagram of the structure of the injection needle in an embodiment of this application.
[0023] Icons: 10-Injection needle to prevent puncture into blood vessels; 11-Injection needle tip; 111-Needle tip; 112-Injection channel; 1121-Main channel; 1122-Connecting section; 113-Drainage hole; 114-Cylindrical section; 115-Needle tip section; 12-Connecting tube; 13-Connecting connector; 131-Fixing plate. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0026] In the description of this application, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0027] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example
[0028] This embodiment provides an injection needle 10 that prevents puncture into blood vessels, which includes an injection needle tip 11, a connecting tube 12, and a connecting connector 13. The connecting connector 13 is used to connect to an injection cylinder.
[0029] The injection needle 11 is fixedly installed at one end of the connecting tube 12, and the connecting connector 13 is fixedly connected to the other end of the connecting tube 12. The needle tip 111 of the injection needle 11 is located on the central axis of the injection needle 11, and the outer surface of the injection needle 11 is on the same surface of revolution. The injection needle 11 has an injection channel inside for the injection fluid to pass through. The injection channel 112 of the injection needle 11 communicates with the connecting tube 12, and the side wall of the injection needle 11 has an injection hole communicating with the injection channel.
[0030] The anti-puncture-into-blood-vessel injection needle 10 of this application, after being connected to a syringe via its connector 13, is inserted into the operating channel of a cystoscope or other endoscope mounting body. Because the anti-puncture-into-blood-vessel injection needle 10 is equipped with a connecting tube 12, it facilitates side entry into the operating channel. It should be noted that some cystoscopes have an operating channel in their sheaths, allowing the anti-puncture-into-blood-vessel injection needle 10 to be inserted from the side. Alternatively, some endoscopes (e.g., cystoscopes) are mounted and fixed using a mounting body, which also has an operating channel, allowing the anti-puncture-into-blood-vessel injection needle 10 to be inserted from the side of the mounting body.
[0031] After the needle tip 11 of the anti-vascular injection needle 10 is inserted into the target urethral wall, an injection solution or therapeutic drug can be injected using a syringe. Exemplarily, the outer wall of the connector 13 is provided with a fixing plate 131, which extends outward 1-2 cm along the outer wall of the connector 13. When connecting the connector 13 to the syringe, holding the fixing plate 131 makes operation more convenient. Furthermore, when the anti-vascular injection needle 10 is inserted into the operating channel, the connector 13 can rest against the entrance of the operating channel, preventing the syringe from being inserted too deeply into the operating channel, thus avoiding inconvenience in injection.
[0032] In this embodiment, the needle tip 111 of the injection needle 11 is located on the central axis of the injection needle 11. A drainage hole 113 is provided on the side wall of the injection needle 11. Since the needle tip 111 has no holes, it punctures the surface of the urethral wall. When the injection needle 11 is inserted into the urethra, it avoids the wedge-shaped effect that damages the urethral wall caused by traditional injection needles. After the injection needle 11 is withdrawn, the wound heals more easily. Furthermore, the outer surface of the injection needle 11 is on the same rotational curved surface, and the drainage hole 113 is located on the side wall of the injection needle 11. With only the needle tip 111 as the tip, it is less likely to puncture a blood vessel and cause bleeding, and it can reduce the puncture wound to the urethral wall caused by the outer surface of the injection needle 11.
[0033] In one embodiment, the injection needle 11 includes a cylindrical segment 114 and a tip segment 115. The outer surface of the tip segment 115 smoothly connects with the outer surface of the cylindrical segment 114, and the outer surface of the tip segment 115 is an outwardly convex arc shape. That is, the smooth connection between the tip 111 and the cylindrical segment 114 is achieved through the outwardly convex arc shape. Therefore, when the injection needle 11 is inserted into the urethral wall, it is convenient to widen the puncture site, and the wound gradually enlarges in a basically circular shape. After the injection needle 11 is withdrawn, the wound heals more easily. For example, the length of the injection needle 11 is 0.5~2cm, such as 0.5cm, 0.8cm, 1cm, 1.2cm, 1.5cm, 1.8cm, or 2cm.
[0034] Furthermore, the injection channel 112 of the injection needle 11 includes a main channel 1121 extending along the axial direction of the injection needle 11 and a connecting section 1122 connecting to the drain hole 113. The sidewall of the connecting section 1122 is arc-shaped, meaning that the connecting section 1122 is an arc-shaped channel. Therefore, when the injection fluid passes through the injection channel 112, from the main channel 1121 through the connecting section 1122 into the drain hole 113, the injection fluid encounters less resistance and can be discharged more easily from the side drain hole 113.
[0035] Furthermore, the connecting tube 12 is configured to bend at 5-30° without creases, and is made of plastic. When the connecting tube 12 is inserted into the operating channel of the cystoscope, it is inserted from the side. The fact that the connecting tube 12 can bend at 5-30° without creases prevents it from bending during insertion, which could hinder the injection of the solution. Exemplarily, the connecting tube 12 can bend at any of 5°, 10°, 15°, 20°, 25°, and 30°, or any value between two of these. Optionally, the connecting tube 12 is made of polyethylene or polypropylene.
[0036] For example, the length of the connecting pipe 12 is 5-60 cm, the outer diameter is 1-5 mm, and the wall thickness is 0.3-2 mm. For instance, the length of the connecting pipe 12 can be any one or any two of 5 cm, 10 cm, 15 cm, 20 cm, 25 cm, 30 cm, 35 cm, 40 cm, 45 cm, 50 cm, 45 cm, 50 cm, 55 cm, and 60 cm. For instance, the outer diameter of the connecting pipe 12 can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. For instance, the wall thickness of the connecting pipe 12 can be 0.3 mm, 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.5 mm, 1.8 mm, or 2 mm. Optionally, the outer wall of the connecting pipe 12 is provided with graduation lines and graduation markings.
[0037] In some implementations, the length of the connecting tube 12 is 30-50 cm, the outer diameter is 3-5 mm, and the wall thickness is 0.8-2 mm. When the length of the connecting tube 12 is relatively long, such as 30-50 cm, the outer diameter of the connecting tube 12 is chosen to be 3-5 mm, which is relatively larger in size. The wall thickness of the connecting tube 12 is chosen to be 0.8-2 mm, which is relatively thick. While ensuring that the connecting tube 12 can be bent at 5-30° without creases, it can provide more stable support. When the injection needle 11 is inserted into the urethral wall, it is less likely to shake, and it can be inserted into the target area more accurately, avoiding repeated punctures that would increase the patient's pain.
[0038] In addition, this embodiment also provides a urethral injection device, including a syringe and the above-mentioned anti-puncture-into-blood-vessel injection needle 10, wherein the connector 13 of the anti-puncture-into-blood-vessel injection needle 10 is connected to the syringe.
[0039] In summary, the anti-vascular injection needle 10 of this application, after being connected to a syringe, is inserted into the operating channel of a cystoscope or other endoscope mounting body. Because the anti-vascular injection needle 10 is equipped with a connecting tube 12, it facilitates side entry into the operating channel. Furthermore, the needle tip 111 of the injection needle 11 is located on its central axis, and a drainage hole 113 is provided on the side wall of the injection needle 11. Since the needle tip 111 has no holes, it punctures the surface of the urethral wall. When the injection needle 11 is inserted into the urethra, it avoids the wedge-shaped effect of traditional injection needles that damages the urethral wall. After the injection needle 11 is withdrawn, the wound heals more easily. Moreover, the outer surface of the injection needle 11 is on the same rotating curved surface, the drainage hole 113 is located on the side wall of the injection needle 11, and there is only one tip 111, which makes it less likely to pierce blood vessels and cause bleeding, and can reduce the puncture damage to the urethral wall by the outer surface of the injection needle 11.
[0040] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An injection needle designed to prevent puncture into blood vessels, characterized in that, It includes: An injection needle, wherein the needle tip is located on the central axis of the injection needle, the outer surface of the injection needle is on the same rotational surface, the injection needle has an injection channel for the injection liquid to pass through, and the side wall of the injection needle has a drainage hole communicating with the injection channel. A connecting tube, wherein the injection needle is fixedly installed at one end of the connecting tube, and the injection channel communicates with the connecting tube; and, A connecting connector is fixedly connected to the other end of the connecting tube and is used to connect to the syringe.
2. The injection needle for preventing puncture into blood vessels according to claim 1, characterized in that, The injection channel includes a main channel extending along the axial direction of the injection needle and a connecting section that connects to the drainage hole, wherein the sidewall of the connecting section is arc-shaped.
3. The injection needle for preventing puncture into blood vessels according to claim 1, characterized in that, The injection needle includes a cylindrical section and a tip section. The outer surface of the tip section is smoothly connected to the outer surface of the cylindrical section, and the outer surface of the tip section is an outwardly convex arc shape.
4. The injection needle for preventing puncture into blood vessels according to any one of claims 1 to 3, characterized in that, The connecting tube is configured to bend 5 to 30 degrees without creases, and the connecting tube is a plastic tube.
5. The injection needle for preventing puncture into blood vessels according to claim 4, characterized in that, The connecting pipe is a polyethylene pipe.
6. The injection needle for preventing puncture into blood vessels according to claim 4, characterized in that, The length of the connecting pipe is 5~60cm, the outer diameter is 1~5mm, and the wall thickness is 0.3~2mm.
7. The injection needle for preventing puncture into blood vessels according to claim 6, characterized in that, The length of the connecting pipe is 30-50cm, the outer diameter is 3-5mm, and the wall thickness is 0.8-2mm.
8. The injection needle for preventing puncture into blood vessels according to any one of claims 1 to 3, characterized in that, The length of the injection needle is 0.5~2cm.
9. The injection needle for preventing puncture into blood vessels according to any one of claims 1 to 3, characterized in that, The outer wall of the connector is provided with a fixing plate, which extends outward 1-2 cm along the outer wall of the connector.
10. A urethral injection device, characterized in that, The invention includes a syringe and an injection needle for preventing puncture into blood vessels as described in any one of claims 1 to 9, wherein the connector of the injection needle for preventing puncture into blood vessels is connected to the syringe.