A sealed botulinum toxin injection needle with fixed point and depth

Abstract

This invention discloses a fully sealed botulinum toxin injection needle with fixed injection point and depth, belonging to the field of medical device technology. It includes a botulinum toxin needle, a monitoring cable, a needle alignment module, and a depth limiting module. The botulinum toxin needle comprises a needle body, a needle shell, and a needle hub connected horizontally in sequence. The needle body is fixed inside the needle hub with medical adhesive and integrally injection molded into the needle shell. This invention uses specialized medical adhesive to fix the needle body and needle hub, and the adhesive solidifies by baking, achieving complete fixation of the needle body and needle hub. Subsequently, integral injection molding is used to completely fuse the needle hub into the needle shell, thus achieving a completely leak-proof effect. The copper strip at the front end of the monitoring cable is directly riveted to the outside of the needle body. During integral injection molding, the plastic is completely fused into the copper strip, improving the connection strength between the monitoring cable and the botulinum toxin needle, effectively preventing leakage, needle detachment, and signal interruption of the monitoring cable connection.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a fully sealed botulinum toxin injection needle with fixed injection point and depth. Background Technology

[0002] Currently, the needle and thread of botulinum toxin injections are directly welded together. However, during subsequent one-piece injection molding, the plastic cannot completely encapsulate and fuse the weld points. Furthermore, air bubbles and pits may appear around the weld points during injection. Under injection pressure, water can enter these air bubbles and pits, subsequently leaking out and causing leakage, resulting in pain and unnecessary harm to the patient. In addition, the lack of a Luer interface screw-on structure at the connection area between the syringe and needle leads to a risk of the needle detaching under injection pressure. Additionally, the thread on the side of the needle was previously welded on; weak welds are prone to detachment and incomplete soldering, increasing the risk of the thread detaching along with the needle, affecting muscle positioning and the accuracy and safety of botulinum toxin injection. Summary of the Invention

[0003] To overcome the aforementioned deficiencies of the prior art, this invention provides a fully sealed botulinum toxin injection needle with fixed injection point and depth. The needle body and needle hub are fixed using specialized medical adhesive, which is then baked to solidify, achieving complete fixation of the needle body and needle hub, providing a thorough seal and waterproofing. Subsequently, the needle hub is integrally injection molded, completely fusing it into the needle shell, thus achieving a completely leak-proof effect. The copper strip at the front end of the monitoring cable is directly riveted to the outside of the needle body. During integral injection molding, the plastic is completely fused into the copper strip, improving the connection strength between the monitoring cable and the botulinum toxin needle, effectively preventing leakage, needle detachment, and signal interruption of the monitoring cable connection. The needle hub, extending to the outside of the needle shell, is connected to the syringe via a Luer interface screw-on structure, providing a complete seal and further enhancing the connection strength, thereby improving the safety of botulinum toxin injection and solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A fully sealed botulinum toxin injection needle with fixed injection point and depth includes a botulinum toxin needle, a monitoring cable, a needle alignment module, and a depth limiting module. The botulinum toxin needle includes a needle body, a needle shell, and a needle hub connected sequentially in a horizontal direction. The needle body is fixed inside the needle hub with medical adhesive and integrally injection molded into the needle shell. The monitoring cable is located outside the needle shell, and a copper strip is fixedly connected to the front end of the monitoring cable. The copper strip is located inside the needle shell and riveted to the outside of the needle body. The needle alignment module includes an alignment ring and an elastic sleeve. The alignment ring wraps around the needle head of the needle body from the outside. The elastic compression sleeve is positioned in front of the needle body. The depth limiting module includes a puncture marker rod, a marker seat, and a fixing buckle. The puncture marker rod is horizontally positioned on the side of the needle body through the fixing buckle and is inserted into the alignment ring. The marker seat is slidably connected to the outside of the puncture marker rod and clamps the front end of the needle shell, controlling the botulinum toxin needle to puncture into a preset injection depth. The outer wall of the puncture marker rod has a scale, and a positioning buckle is slidably connected to the outside of the puncture marker rod. The positioning buckle is located in front of the marker seat and is pressed to clamp the outer wall of the puncture marker rod.

[0005] Furthermore, the needle body surface is coated with an insulating coating, with only the needle tip exposed to collect signals. The tail end of the needle body is inserted into the needle hub, the front end of the needle hub is inserted into and fixed inside the needle housing, and the tail end of the needle hub extends from the tail end of the needle housing to the outside of the needle housing.

[0006] Furthermore, a cable housing is fixedly connected to the outer wall of the needle housing, and the portion of the monitoring cable near the copper strip is inserted into the cable housing.

[0007] Furthermore, the fixing buckle is fixedly connected to the outer wall of the needle housing, the outer wall of the alignment ring is fixedly connected to a side plate, and the puncture marking rod is inserted into the side plate and the fixing buckle.

[0008] Furthermore, the tail end of the elastic sleeve is fixedly connected to the front end of the alignment ring, and the front end of the alignment ring is fixedly connected to two symmetrically distributed elastic push rods, the other end of which is fixedly connected to the elastic sleeve.

[0009] Furthermore, the elastic sleeve has an arc-shaped groove inside, the front end of the puncture marker rod passes through the side plate and extends to the front of the alignment ring, and the needle tip of the needle body is aligned with the front end of the alignment ring.

[0010] Furthermore, a top head is fixedly connected to the tail end of the puncture marking rod. The top head is located behind the fixing buckle, and the diameter of the top head is larger than the diameter of the puncture marking rod.

[0011] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses specialized medical adhesive to fix the needle body and needle hub. The adhesive is then baked to solidify, achieving complete fixation of the needle body and needle hub, providing a thorough seal and waterproofing. Subsequently, a single injection molding process is used to completely fuse the needle hub into the needle shell, resulting in a completely leak-proof effect. The copper strip at the front end of the monitoring cable is directly riveted to the outside of the needle body. During the single injection molding process, the plastic completely fuses into the copper strip, effectively filling its internal space and integrating it into the needle shell. This enhances the connection strength between the monitoring cable and the botulinum toxin needle, effectively preventing leakage, needle detachment, and signal interruption. The needle hub, extending to the outside of the needle shell, connects to the syringe via a Luer interface screw-on structure, providing a complete seal and further enhancing the connection's strength, thereby improving the safety of botulinum toxin injections.

[0012] 2. This invention features a needle alignment module and a depth limiting module positioned front-to-back on the side of the needle body. Before injection, an elastic sleeve contacts and presses against the patient's skin, and an alignment ring positions the needle tip outside the injection area, while the tip of the puncture marker contactes the patient's skin. During injection, the changes in the scale corresponding to the movement of the marker on the puncture marker are observed, allowing the needle to penetrate the patient's skin at a predetermined angle and location to a preset injection depth. Monitoring cables connected to an external electromyography (EMG) monitoring device provide EMG signal feedback, ensuring precise injection of botulinum toxin into the correct muscle layer. This improves muscle positioning and the accuracy and safety of botulinum toxin injection. No needle replacement is required during injection, ensuring complete accuracy and ease of use for doctors. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments, the accompanying drawings will be briefly described below.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a top view of the structure of the present invention; Figure 4 This is a schematic diagram of the exploded structure of the present invention; Figure 5 This is a schematic diagram of the exploded structure from another perspective of the present invention; In the diagram: 1. Botulinum toxin needle; 11. Needle body; 12. Needle shell; 121. Cable holder; 13. Needle seat; 2. Monitoring cable; 21. Copper strip; 3. Needle alignment module; 31. Alignment ring; 311. Side plate; 32. Elastic sleeve; 321. Arc groove; 33. Elastic push rod; 4. Depth limiting module; 41. Puncture marker rod; 411. Top head; 42. Marker seat; 43. Fixing buckle; 44. Scale; 5. Positioning buckle. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Specific mechanical structures of the present invention will be described in conjunction with the following references. Figures 1 to 5 The detailed description of the structure will be clearly presented. All structural details mentioned in the following embodiments are based on the accompanying drawings.

[0016] Please see Figures 1-5 In this embodiment of the invention, a fully sealed botulinum toxin injection needle with fixed point and depth includes a botulinum toxin needle 1, a monitoring wire 2, a needle alignment module 3, and a depth limiting module 4. The botulinum toxin needle 1 includes a needle body 11, a needle shell 12, and a needle base 13 connected in a horizontal direction. The needle body 11 is fixed inside the needle base 13 with medical adhesive and integrally injection molded into the needle shell 12. The monitoring wire 2 is located outside the needle shell 12, and a copper strip 21 is fixedly connected to the front end of the monitoring wire 2. The copper strip 21 is located inside the needle shell 12 and riveted to the outside of the needle body 11. The needle alignment module 3 includes an alignment ring 31 and an elastic sleeve 32. The alignment ring 31 wraps around the needle body from the outside. The needle tip of the needle body 11 is positioned with an elastic sleeve 32 in front of the needle body 11. The depth limiting module 4 includes a puncture marker rod 41, a marker seat 42, and a fixing buckle 43. The puncture marker rod 41 is horizontally positioned on the side of the needle body 11 by the fixing buckle 43 and is connected to the alignment ring 31. The marker seat 42 is slidably connected to the outside of the puncture marker rod 41 and clamps the front end of the needle shell 12, controlling the botulinum toxin needle 1 to puncture into the preset injection depth. The outer wall of the puncture marker rod 41 has a scale 44. A positioning buckle 5 is slidably connected to the outside of the puncture marker rod 41. The positioning buckle 5 is located in front of the marker seat 42 and is clamped to the outer wall of the puncture marker rod 41 by pressure.

[0017] The botulinum toxin needle 1 is used in conjunction with a syringe. The botulinum toxin needle 1 includes a needle body 11, a needle shell 12, and a needle hub 13, which are connected sequentially in a horizontal direction. The tail end of the needle body 11 is inserted into the needle hub 13 and fixed therein with specialized medical adhesive. After baking for one hour, the adhesive solidifies, forming a strong and sealed bond between the needle body 11 and the needle hub 13. Subsequently, the fused needle body 11 and needle hub 13 are injection molded in a mold. The needle shell 12 is also injection molded in a mold, with the needle body 11 and needle hub 13 integrally injection molded inside the shell 12, effectively injection molding and fusing the needle body 11, needle shell 12, and needle hub 13. Special medical adhesive is used to fix the needle body 11 and the needle seat 13 together. The adhesive is then baked to solidify, achieving complete fixation of the needle body 11 and the needle seat 13, thus providing a complete seal and waterproofing. The needle seat 13 is then fully fused into the needle shell 12 through integral injection molding, ensuring that there is no leakage.

[0018] The monitoring cable 2 is located on the outside of the needle housing 12. The copper strip 21 is fixed to the front end of the monitoring cable 2. A cable housing 121 is fixedly connected to the outer wall of the needle housing 12. The part of the monitoring cable 2 near the copper strip 21 is inserted into the cable housing 121 to tightly connect the monitoring cable 2 and the needle housing 12, positioning the monitoring cable 2 on the side of the needle housing 12. The copper strip 21 is located inside the needle housing 12 and is directly riveted to the outside of the needle body 11. When integrally injection molded, the plastic is completely fused into the interior of the copper strip 21, effectively filling the internal space of the copper strip 21 and fusing into the interior of the needle housing 12. This improves the firmness of the connection between the monitoring cable 2 and the botulinum toxin needle 1, effectively preventing leakage, needle detachment, and signal interruption of the monitoring cable 2. The front end of the needle hub 13 is inserted into and fixed inside the needle housing 12, and the tail end of the needle hub 13 extends from the tail end of the needle housing 12 to the outside of the needle housing 12. The needle hub 13 extending from the tail end to the outside of the needle housing 12 is connected to the syringe through the Luer interface screwing structure, which completely seals the connection and further improves the firmness of the connection between the botulinum toxin needle 1 and the syringe, thereby improving the safety of botulinum toxin injection.

[0019] The depth limiting module 4 consists of a puncture marker rod 41, a marker seat 42, and a retaining buckle 43. The depth limiting module 4 positions the needle alignment module 3 in front of the botulinum toxin needle 1. The retaining buckle 43 is fixedly connected to the outer wall of the needle housing 12. The puncture marker rod 41 is inserted into the retaining buckle 43, and the marker seat 42 is slidably connected to the outer side of the puncture marker rod 41, thus stably combining the puncture marker rod 41, marker seat 42, and retaining buckle 43, and horizontally positioning the entire depth limiting module 4 on the side of the needle body 11. The marker seat 42 can slide along the outer wall of the puncture marker rod 41, and the retaining buckle 43 can also slide along the outer wall of the puncture marker rod 41 to facilitate adjustment of the positions of the retaining buckle 43 and marker seat 42 on the outer side of the puncture marker rod 41. The outer wall of the puncture marker rod 41 has a scale 44, which is used to control the movement distance of the marker seat 42 on the outer side of the puncture marker rod 41. A positioning buckle 5 is slidably connected to the outer side of the puncture marker rod 41. The positioning buckle 5 is located in front of the marker seat 42. The positioning buckle 5 is pressed and clamped to the outer wall of the puncture marker rod 41 to facilitate the adjustment and fixing of the positioning buckle 5 on the puncture marker rod 41. The positioning buckle 5 is always in front of the marker seat 42 on the outer wall of the puncture marker rod 41, so that the positioning buckle 5 can block the marker seat 42 from the front, effectively blocking and controlling the movement distance of the marker seat 42, thereby achieving blocking and positioning after the marker seat 42 moves. The marker seat 42 is clamped to the front end of the needle shell 12 by a snap-fit ​​method, so that the marker seat 42 can move with the botulinum toxin needle 1. By observing and preset the movement distance of the marker seat 42, the puncture depth of the botulinum toxin needle 1 can be preset, so as to effectively control the fixed-point puncture depth of the botulinum toxin needle 1.

[0020] The needle alignment module 3 consists of an alignment ring 31 and an elastic sleeve 32. The tail end of the elastic sleeve 32 is fixedly connected to the front end of the alignment ring 31. Two symmetrically distributed elastic push rods 33 are fixedly connected to the front end of the alignment ring 31. The other end of the elastic push rods 33 is fixedly connected to the elastic sleeve 32, stably connecting the alignment ring 31 and the elastic sleeve 32. A side plate 311 is fixedly connected to the outer wall of the alignment ring 31. The front end of the puncture marker rod 41 is inserted into the side plate 311, stably connecting the needle alignment module 3 to the front of the botulinum toxin needle 1. The alignment ring 31 is positioned on the outside of the needle tip portion of the needle body 11, and the needle tip portion of the needle body 11 is aligned with the front end of the alignment ring 31, so that the alignment ring 31 wraps around and protects the needle tip portion of the needle body 11 from the outside. The elastic sleeve 32 is positioned in front of the needle tip portion of the needle body 11, so that before the medical staff operates the botulinum toxin needle 1 to inject, the elastic sleeve 32 first contacts the skin of the patient's injection area. While the elastic sleeve 32 is squeezed and deformed, it can squeeze the patient's skin, which can squeeze and tighten the skin of the patient's injection area, ensuring that the botulinum toxin needle 1 is successfully positioned and punctured into the patient's skin.

[0021] The front end of the puncture marker rod 41 extends through the side plate 311 to the front of the alignment ring 31. As the elastic sleeve 32 deforms, it allows the front end of the puncture marker rod 41 to contact the patient's skin. This combination ensures the botulinum toxin needle 1 is held at the designated puncture angle. Medical personnel operate the syringe to bring the needle body 11 from inside the alignment ring 31 towards the puncture injection point on the patient's skin, allowing the needle body 11 to puncture and enter the patient's skin. The puncture marker rod 41 remains stationary in contact with the patient's skin. The marker seat 42 and the fixing buckle 43 move along the outer wall of the puncture marker rod 41, and the scale 44 is observed to control the puncture depth of the needle body 11. Before injection, medical personnel can connect the positioning buckle 5 to the puncture marker rod 41 according to the preset puncture depth, adjust it to the corresponding scale 44, and then lock it. During the injection, the needle 11 punctures the skin, and the marker seat 42 moves on the surface of the puncture marker rod 41. When the marker seat 42 contacts the positioning buckle 5, it indicates that the preset depth has been reached, thus prompting the medical staff to stop advancing the needle 11 to ensure that it is punctured accurately at the specified angle and position. This allows the needle 11 to puncture the patient's skin at the preset injection depth at the specified angle and position.

[0022] A top head 411 is fixedly connected to the tail end of the puncture marker rod 41. The top head 411 is located behind the fixing buckle 43. The diameter of the top head 411 is larger than the diameter of the puncture marker rod 41. This top head can restrict the position, direction of movement, and distance of the fixing buckle 43 and the marker seat 42 outside the puncture marker rod 41, preventing the fixing buckle 43 and the marker seat 42 from detaching from the tail end of the puncture marker rod 41. An arc-shaped groove 321 is provided inside the elastic pressure sleeve 32. The arc-shaped groove 321 provides space for the needle body 11 to approach the patient's skin, and at the same time allows medical staff to use cotton swabs to apply pressure for hemostasis after the needle body 11 is withdrawn from the puncture injection point.

[0023] The monitoring cable 2 connects to an external electromyography (EMG) detection device for collecting and transmitting EMG signals. During injection, when the needle tip 11 contacts the target muscle, the weak electrical signal generated by the muscle is transmitted through the needle 11, the connected copper strip 21, and then through the monitoring cable 2 to the external EMG detection device. Based on the signal feedback, the device can help determine whether the needle tip has accurately reached the target muscle position. The depth limiting module 4 works in conjunction with the monitoring cable 2 to simultaneously control the injection depth and position of the botulinum toxin needle 1 from both inside and outside, ensuring that the botulinum toxin is accurately injected into the correct muscle layer, achieving precise positioning and injection in one go, without the need to repeatedly adjust the needle tip position of the botulinum toxin needle 1. This improves the consistency of botulinum toxin injections performed by medical staff, enhances the accuracy and safety of muscle positioning and botulinum toxin injection, and ensures that the syringe will not be ejected even if the internal pressure is too high. It simultaneously completes EMG signal acquisition, muscle positioning, and botulinum toxin injection, eliminating the need for doctors to change needles, ensuring completely accurate positioning and ease of use for doctors.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A fully sealed botulinum toxin injection needle with fixed injection point and depth, characterized in that, The device includes a botulinum toxin needle (1), a monitoring wire (2), a needle alignment module (3), and a depth limiting module (4). The botulinum toxin needle (1) includes a needle body (11), a needle shell (12), and a needle base (13) connected in sequence in the horizontal direction. The needle body (11) is fixed inside the needle base (13) with medical glue and integrally injection molded into the needle shell (12). The monitoring wire (2) is located outside the needle shell (12). A copper strip (21) is fixedly connected to the front end of the monitoring wire (2). The copper strip (21) is located inside the needle shell (12) and riveted to the outside of the needle body (11). The needle alignment module (3) includes an alignment ring (31) and an elastic sleeve (32). The alignment ring (31) wraps around the needle part of the needle body (11) from the outside and positions the elastic sleeve (32) in front of the needle body (11). The depth limiting module (4) includes a puncture marker rod (41), a marker seat (42), and a fixing buckle (43). The puncture marker rod (41) is horizontally positioned on the side of the needle body (11) through the fixing buckle (43) and is inserted into the alignment ring (31). The marker seat (42) is slidably connected to the outside of the puncture marker rod (41) and clamps the front end of the needle shell (12) to control the botulinum toxin needle (1) to puncture into the preset injection depth. The outer wall of the puncture marker rod (41) has a scale (44), and a positioning buckle (5) is slidably connected to the outer side of the puncture marker rod (41). The positioning buckle (5) is located in front of the marker seat (42), and the positioning buckle (5) is pressed and clamped to the outer wall of the puncture marker rod (41).

2. The fully sealed botulinum toxin injection needle with fixed injection point and depth according to claim 1, characterized in that, The tail end of the needle body (11) is inserted into the needle seat (13), the front end of the needle seat (13) is inserted into and fixed inside the needle shell (12), and the tail end of the needle seat (13) extends from the tail end of the needle shell (12) to the outside of the needle shell (12).

3. The fully sealed botulinum toxin injection needle with fixed injection point and depth according to claim 1, characterized in that, The outer wall of the needle shell (12) is fixedly connected to a wire tube socket (121), and the part of the monitoring cable (2) near the copper strip (21) is inserted into the wire tube socket (121).

4. The fully sealed botulinum toxin injection needle with fixed injection point and depth according to claim 1, characterized in that, The fixing buckle (43) is fixedly connected to the outer wall of the needle housing (12), and the alignment ring (31) has a side plate fixedly connected to its outer wall. (311) The puncture marker rod (41) is inserted into the side plate (311) and the fixing buckle (43).

5. A fully sealed botulinum toxin injection needle with fixed injection point and depth according to claim 1, characterized in that, The tail end of the elastic sleeve (32) is fixedly connected to the front end of the alignment ring (31), and the front end of the alignment ring (31) is fixedly connected to two symmetrically distributed elastic push rods (33), and the other end of the elastic push rods (33) is fixedly connected to the elastic sleeve (32).

6. A fully sealed botulinum toxin injection needle with fixed injection point and depth according to claim 4, characterized in that, The elastic sleeve (32) has an arc groove (321) inside. The front end of the puncture marker rod (41) passes through the side plate (311) and extends to the front of the alignment ring (31). The needle tip of the needle body (11) is aligned with the front end of the alignment ring (31).

7. A fully sealed botulinum toxin injection needle with fixed injection point and depth according to claim 1, characterized in that, The tail end of the puncture marker rod (41) is fixedly connected to a top head (411), which is located behind the fixing buckle (43). The diameter of the top head (411) is larger than the diameter of the puncture marker rod (41).

Images