Injection needle and injector for urethral injection
By designing the urethral injection needle so that the needle tip and the needle body are on the same rotating curved surface, setting a specific angle for the discharge hole, and combining it with the display section to absorb blood, the problems of damage and contamination during urethral injection are solved, achieving a low-damage and low-contamination injection effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-03-27
AI Technical Summary
Existing injection needles are prone to causing capillary bleeding and contamination of the injection solution when injected into the urethra, and they also cause significant damage.
Design an injection needle for urethral injection, wherein the tip of the needle is located on the axis of the needle body, and the outer surface of the needle is on the same rotational surface as the needle body. The angle between the axis of the outlet hole and the needle body is 10~80°, and the distance between the end of the outlet hole away from the tip and the end of the needle tip is less than the distance between the end closer to the second end and the end of the needle tip. The outlet hole is located on the side wall of the needle body to avoid wedge-shaped damage to the urethral wall, and blood is absorbed through the display to prevent contamination.
It reduces damage during urethral injection, avoids capillary bleeding and contamination of the injection solution, and ensures the safety and cleanliness of the injection process.
Smart Images
Figure CN224039282U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to injection needle technical field, specifically, relate to a kind of injection needle for urethra injection, syringe. BACKGROUND
[0002] The existing clinical commonly used injection needle is generally open at top end, and needle tip is bevel, the injection needle is used, when piercing into tissue, due to wedge effect, the wound of making the trauma be larger, especially urethra tissue, many capillary vessels, very easy to cause capillary vessel hemorrhage.Moreover, when needle tip pierces tissue, due to opening close to needle tip, needle tip pierces tissue and very easy to bring tissue fragment into opening, when injecting, it is easy to cause injection liquid pollution. SUMMARY
[0003] The utility model provides a kind of injection needle for urethra injection, syringe, it is less damaged to urethra wall, not easy to bleed, it is suitable for urethra injection, and injection liquid is not easy to be polluted.
[0004] The utility model embodiment is realized as follows:
[0005] First, the utility model embodiment provides a kind of injection needle for urethra injection, including the needle main part of extending along the axial direction and the needle tip portion of being located at the one end of needle main part, the tip of needle tip portion is located on the axis of needle main part;The needle main part is hollow structure, and inside has liquid flow passage, the side wall of needle main part is equipped with the liquid outlet hole being communicated with liquid flow passage, the outer surface of needle main part and the outer surface of needle tip portion end are in same rotary curved surface, and needle tip portion and needle main part are connected by convex arc surface;The hole wall of liquid outlet hole has first end and second end, first end is connected with liquid flow passage, second end is connected with the outer surface of needle main part, the included angle between the axis of liquid outlet hole and the axis of needle main part is 10 ~ 80 °, and the distance between the one end of the axis of liquid outlet hole close to first end and the end of needle tip portion is less than the distance between the one end of the axis of liquid outlet hole close to second end and the end of needle tip portion.
[0006] In a possible implementation, the included angle between the axis of liquid outlet hole and the axis of needle main part is 15 ~ 60 °.
[0007] In a possible implementation, the outer surface of needle tip portion is convex surface.
[0008] In a possible implementation, on the longitudinal symmetry plane of liquid outlet hole, the hole wall of the section of liquid outlet hole is inclined and gradually extends towards the tip of needle tip portion in the direction of second end pointing to first end.
[0009] In a possible implementation, the one end of the hole wall of liquid outlet hole close to second end has circular arc chamfer.
[0010] In a possible implementation, the projection of the liquid outlet hole along the axis is a circular hole.
[0011] In a possible implementation, the outer surface of the injection needle has a display part capable of absorbing blood and displaying after absorbing blood.
[0012] In a possible implementation, the display part is arranged at the needle tip part and away from the tip end.
[0013] In a possible implementation, the length of the needle tip part is 3-10mm.
[0014] In a second aspect, the utility model provides a syringe, including syringe barrel and the injection needle of first aspect, the injection needle is installed in one end of syringe barrel.
[0015] The utility model embodiment has at least the following beneficial effects:
[0016] The injection needle for urethra injection of the utility model, the tip end of the needle tip part is located on the axis of the needle main body, the outer surfaces of the needle main body and the needle tip part are on the same rotary curved surface, the needle tip part and the needle main body are connected by an outward convex arc surface, and the outer surface of the injection needle is a smooth arc surface or curved surface as a whole. When the injection needle continues to penetrate into the urethra after the tip end of the needle tip part pierces the surface of the urethra wall, the damage of the wedge-shaped effect of the traditional injection needle to the urethra wall is avoided, and the needle opening is easily closed and restored after the injection needle is pulled out. Moreover, the angle between the axis of the liquid outlet hole and the axis of the needle main body is 10-80 DEG, the distance between the end of the liquid outlet hole close to the first end and the end of the needle tip part is less than the distance between the end of the liquid outlet hole close to the second end and the end of the needle tip part, and the angle between the hole wall of the end of the liquid outlet hole away from the tip end and the outer surface is obtuse. In the process of the injection needle piercing into the tissue, the injection needle is not easy to form a sharp point at the liquid outlet to cause damage to the tissue.
[0017] In addition, the liquid outlet hole is arranged on the side wall of the needle main body, when the tip end of the needle tip part pierces the urethra wall, even if a capillary vessel is pierced and blood is adhered, when the filler or the drug is pushed out from the liquid outlet hole and enters the tissue, the injection needle is not easy to be contaminated. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope, and for the ordinary skilled in the art, other related drawings can be obtained without the creative labor on the premise of the drawings.
[0019] Figure 1 It is a structural schematic view of the injection needle of the utility model embodiment.
[0020] Figure 2 Structure diagram of the injection needle of the embodiment of the present application;
[0021] Figure 3 Structure diagram of another injection needle of the embodiment of the present application;
[0022] Figure 4 For Figure 3 Enlarged view of the region I.
[0023] Icon: 10-injection needle; 11-needle body; 111-liquid flow channel; 112-liquid outlet hole; 1121-first end; 1122-second end; 1123-axis line; 1124-circular arc chamfer; 12-needle tip; 121-tip; 13-display part. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be described clearly and completely below in combination with the drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiment of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.
[0026] In the description of the present application, it should be noted that the directions or position relationships indicated by the terms "inner", "outer" and the like are based on the directions or position relationships shown in the drawings, or the directions or position relationships in which the products of the application are usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.
[0027] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term '' set '', '' install '', '' connect '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be direct connection, also can indirectly connect through intermediate medium, can be two element inside intercommunication. For ordinary skilled person in the art, can understand the specific meaning of above-mentioned term in the utility model with specific situation. Embodiment
[0028] The embodiment provides an injection needle 10 for urethra injection, which comprises an axially extending needle body 11 and a needle tip part 12 arranged at one end of the needle body 11, and the tip end 121 of the needle tip part 12 is located on the axis of the needle body 11. The outer surface of the needle body 11 and the outer surface of the end of the needle tip part 12 are on the same rotary curved surface, and the needle tip part 12 and the needle body 11 are connected by a convex arc surface. Therefore, the outer surface of the injection needle 10 is a smooth arc or curved surface as a whole, the tip end 121 of the needle tip part 12 pierces the surface of the urethra wall, and when the injection needle 10 continues to penetrate into the urethra, the damage of the wedge-shaped effect of the conventional injection needle 10 to the urethra wall is avoided, and after the injection needle 10 is pulled out, the needle opening can be easily closed and restored.
[0029] In an embodiment, the outer surface of the needle tip part 12 is a convex surface, and the outer shape of the needle body 11 is a cylindrical shape. The convex arc surface connecting the needle tip part 12 and the needle body 11 is smoothly connected with the convex surface of the needle tip part 12 and the surface of the needle body 11. The outer surface of the needle tip part 12 is a rotary curved surface formed by rotating a circular arc along the axis.
[0030] The needle body 11 is a hollow structure and has a liquid flow channel 111 inside, and the side wall of the needle body 11 is provided with a liquid outlet hole 112 communicating with the liquid flow channel 111. The hole wall of the liquid outlet hole 112 has a first end 1121 and a second end 1122, the first end 1121 is connected with the liquid flow channel 111, and the second end 1122 is connected with the outer surface of the needle body 11. Referring to Figure 1 , the first end 1121 is the left end, and the second end 1122 is the right end.
[0031] The included angle A between the axis center line 1123 of the liquid outlet hole 112 and the axis of the needle body 11 is 10-80°, and the distance between the end of the axis center line 1123 of the liquid outlet hole 112 close to the first end 1121 and the end of the needle tip part 12 is less than the distance between the end of the axis center line 1123 of the liquid outlet hole 112 close to the second end 1122 and the end of the needle tip part 12. Therefore, the included angle B between the hole wall of the end of the liquid outlet hole 112 away from the tip end 121 and the outer surface is an obtuse angle (referring to Figure 2), in the process of the injection needle 10 puncturing into the tissue, it is not easy to form a sharp spike at the liquid outlet to cause damage to the tissue. In addition, the liquid outlet hole 112 is arranged at the side wall of the needle body 11, when the tip 121 of the needle tip portion 12 pierces the urethral wall, even if a capillary vessel is pierced and blood is adhered, when the filler or the drug is pushed out from the liquid outlet into the tissue, it is not easy to be contaminated.
[0032] Optionally, the angle A between the axis line 1123 of the liquid outlet hole 112 and the axis of the needle body 11 is any one of 10°, 15°, 20°, 30°, 40°, 45°, 50°, 60°, 70°, 75° and 80° or a value between any two of them. Exemplarily, the angle A between the axis line 1123 of the liquid outlet hole 112 and the axis of the needle body 11 is 15-60°.
[0033] Exemplarily, the projection of the liquid outlet hole 112 along the axis line 1123 is a circular hole. It can be understood that in other embodiments, the projection of the liquid outlet hole 112 along the axis line 1123 can also be other shapes, for example, quadrilateral, oval, etc., and the shape of the projection of the liquid outlet hole 112 along the axis line 1123 is not specifically limited by the present application.
[0034] On the longitudinal symmetry plane of the liquid outlet hole 112, in the direction from the second end 1122 to the first end 1121 (from right to left), the hole wall of the cross section of the liquid outlet hole 112 is inclined and gradually extends towards the tip 121 of the needle tip portion 12. The angle B between the hole wall of the cross section of the liquid outlet hole 112 and the outer surface of the needle body 11 is an obtuse angle, in the process of the injection needle 10 puncturing into the tissue, it is not easy to form a sharp spike at the liquid outlet to cause damage to the tissue. In addition, the end of the hole wall of the liquid outlet hole 112 close to the second end 1122 has a circular arc chamfer 1124 (refer to Figure 4 ), then the end of the liquid outlet hole 112 close to the outer surface of the needle body 11 is a curved surface, when the injection needle 10 punctures into the tissue, the hole wall of the liquid outlet hole 112 is not easy to cause damage to the tissue.
[0035] Further, the outer surface of the injection needle 10 has a display portion 13 (refer to Figure 3The display part 13 is arranged on the needle tip part 12 and away from one end of the tip 121. The display part 13 can be made of paper which can absorb liquid, for example, cellulose-based paper. Since the display part 13 is arranged on the needle tip part 12 and away from one end of the tip 121, the tip 121 can keep sharp to puncture. When the injection needle 10 is inserted into the tissue, if the tip 121 punctures a capillary vessel, the display part 13 arranged on the needle tip part 12 can absorb blood, further avoiding that the blood remains on the needle tip part 12 to contaminate the injection liquid from the liquid outlet hole 112. Moreover, the display part 13 shows color after absorbing blood, and after auxiliary observation by an endoscope or the like, the injection needle 10 can be pulled out from the tissue according to the situation and re-inserted into the injection point.
[0036] Exemplarily, the length of the needle tip part 12 is 3-10mm, for example, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, and the needle tip part 12 reserves enough length for arranging the display part 13. Exemplarily, the surface of the needle tip part 12 has a groove, and the display part 13 is fixedly arranged in the groove. When the display part 13 is arranged in the groove, the surface of the display part 13 is flush with the outer surface of the needle tip part 12.
[0037] The embodiment also provides an injector which comprises a syringe barrel and the injection needle described above, and the injection needle is mounted on one end of the syringe barrel.
[0038] In conclusion, the injection needle 10 for urethral injection of the utility model, the tip 121 of the needle tip part 12 is located on the axis of the needle body 11, and the outer surfaces of the needle body 11 and the needle tip part 12 are on the same rotary curved surface, and the needle tip part 12 and the needle body 11 are connected by an outward convex curved surface, so that the outer surface of the injection needle 10 is a smooth curved surface as a whole. When the tip 121 of the needle tip part 12 punctures the surface of the urethral wall, the injection needle 10 continues to penetrate into the urethra, avoiding the damage of the wedge-shaped effect of the traditional injection needle 10 to the urethral wall, and the needle opening can be easily closed and recovered after the injection needle 10 is pulled out. Moreover, the included angle B between the hole wall away from one end of the tip 121 and the outer surface of the liquid outlet hole 112 is an obtuse angle, and the liquid outlet hole 112 is arranged on the side wall of the needle body 11, so that the injection needle 10 is not easy to form a sharp point on the liquid outlet hole to cause damage to the tissue during the process of puncturing into the tissue. In addition, the liquid outlet hole 112 is arranged on the side wall of the needle body 11, so that even if the tip 121 of the needle tip part 12 sticks to blood when puncturing the urethral wall, the injection needle 10 is not easy to be contaminated when the filler or the drug is pushed out from the liquid outlet hole and enters the tissue.
[0039] The preferred embodiments of the utility model are merely used for the description and are not used to limit the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. An injection needle for urethral injection, characterized in that, The device includes an axially extending needle body and a needle tip located at one end of the needle body. The tip of the needle tip is located on the axis of the needle body. The needle body is hollow and has a liquid flow channel inside. The side wall of the needle body has a liquid outlet hole communicating with the liquid flow channel. The outer surface of the needle body and the outer surface of the needle tip are on the same rotational surface, and the needle tip and the needle body are connected by an outwardly convex arc surface. The wall of the liquid outlet hole has a first end and a second end. The first end is connected to the liquid flow channel, and the second end is connected to the outer surface of the needle body. The angle between the axis of the liquid outlet hole and the axis of the needle body is 10~80°, and the distance between the end of the axis of the liquid outlet hole near the first end and the end of the needle tip is less than the distance between the end of the axis of the liquid outlet hole near the second end and the end of the needle tip.
2. The injection needle for urethral injection according to claim 1, characterized in that, The angle between the centerline of the liquid outlet and the axis of the needle body is 15~60°.
3. The injection needle for urethral injection according to claim 2, characterized in that, The outer surface of the needle tip is a convex surface.
4. The injection needle for urethral injection according to any one of claims 1 to 3, characterized in that, On the longitudinal plane of symmetry of the liquid outlet, along the direction from the second end to the first end, the wall of the liquid outlet cross-section is inclined and gradually extends towards the tip of the needle.
5. The injection needle for urethral injection according to claim 4, characterized in that, The wall of the liquid outlet has a rounded chamfer at the end near the second end.
6. The injection needle for urethral injection according to any one of claims 1 to 3, characterized in that, The projection of the liquid outlet hole along the axis is a circular hole.
7. The injection needle for urethral injection according to claim 4, characterized in that, The outer surface of the injection needle has a display section that can absorb blood and display color after blood absorption.
8. The injection needle for urethral injection according to claim 7, characterized in that, The display portion is located at the tip of the needle and at one end away from the tip.
9. The injection needle for urethral injection according to any one of claims 1 to 3, characterized in that, The length of the needle tip is 3~10mm.
10. A syringe, characterized in that, It includes an injection cartridge and an injection needle as described in any one of claims 1 to 9, wherein the injection needle is mounted on one end of the injection cartridge.