A double cheek local drug injector and its injection method

Abstract

The application discloses a double-cheek local medicine injector and an injection method thereof, and relates to the technical field of medical treatment.The injector comprises an injection barrel, a liquid outlet barrel connected to the front end of the injection barrel, a connecting barrel sleeved on the periphery of the liquid outlet barrel, an opening of the connecting barrel being attached to one side of the injection barrel, a needle connected to one end of the connecting barrel of the injection barrel, a push rod slidingly fitted in the hollow part of the injection barrel, a piston head attached to the inside of the injection barrel being connected to the side of the push rod facing the liquid outlet barrel, and a clamping mechanism arranged on the periphery of the injection barrel for clamping the connecting barrel.The clamping mechanism can be used to quickly disassemble the needle, and the medical staff does not need to laboriously pull out the needle, and the medical staff does not need to put the hand into the oral cavity of the patient during the process of pulling out the needle, the connecting barrel can be detached by directly rotating the clamping mechanism at the edge of the needle, and the medical staff is facilitated to replace the injection barrel.

Description

Technical Field

[0001] This invention belongs to the medical field, specifically, it relates to a local drug injector for bilateral cheeks and its injection method. Background Technology

[0002] When treating oral mucosal fibrosis with local drug injection, the buccal mucosa is relatively thin, and some buccal mucosal lesions cover a large area.

[0003] Current injection needles are generally standard clinical needles. When used for localized drug injection to treat lesions of the oral mucosa, the injection effect is poor. Furthermore, conventional clinical injection methods cannot ensure that the drug is evenly injected into the lesion site. By using existing injection methods, the concentration of the injected drug in the buccal mucosa lesion tissue is higher than in other parts of the body. This results in the drug's action time in the buccal mucosa being shorter than in other parts of the body, significantly improving the drug's efficacy. If a patient needs to inject two different drugs into one cheek at different sites, traditional injection methods require repeated needle insertions, causing the patient pain from multiple injections.

[0004] In summary, the present invention provides a local drug injector for both cheeks and its injection method to solve the above-mentioned problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a local drug injector for both cheeks and its injection method.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0007] A local drug injector for bilateral cheeks and its injection method include an injection barrel, a dispensing barrel connected to the front end of the injection barrel, a connecting barrel sleeved around the dispensing barrel, the opening of the connecting barrel fitting against one side of the injection barrel, a needle connected to one end of the connecting barrel, a push rod slidingly fitted in the hollow part of the injection barrel, a piston head fitted against the inside of the injection barrel connected to the side of the push rod facing the dispensing barrel, and a locking mechanism for locking the connecting barrel around the periphery of the injection barrel.

[0008] Optionally, a sealing ring is provided on one side of the syringe, and one end of the connecting cylinder is attached to one side of the sealing ring.

[0009] Optionally, a guide block is connected to the inner wall of the connecting cylinder, and a guide groove adapted to the guide block is opened in the length direction of the liquid outlet cylinder. The guide block is a rectangular block structure, and the guide groove is a rectangular groove structure.

[0010] Optionally, the locking mechanism includes a threaded ring that rotates around the periphery of the syringe, a slide rod that is threadedly engaged with the threaded ring at one end of the syringe, and locking grooves that are adapted to the slide rod are provided in two directions on the periphery of the connecting cylinder.

[0011] Optionally, a first planar thread is provided below the threaded ring, a second planar thread adapted to the first planar thread is provided above the slide bar, a ring body with a T-shaped cross-section is connected to the inner wall of the threaded ring, and an annular groove adapted to the ring body is provided on the periphery of the injection cylinder.

[0012] Optionally, a dovetail block is connected above the slide bar, and a dovetail groove that matches the dovetail block is opened on one side of the cylinder.

[0013] A method for local drug injection into both cheeks includes the following steps:

[0014] Step S1: First, insert the syringe containing the drug 1cm backward from one corner of the mouth to the submucosal area of ​​the cheek. Then, while inserting the needle horizontally backward, push the drug to the front of the pterygomandibular ligament.

[0015] Step S2: Then retract the needle tip to the submucosal part of the insertion point, and push the medicine while inserting the needle obliquely downward and backward to the pterygoid ligament.

[0016] Step S3: Withdraw the needle back to the submucosal area at the corner of the mouth, then push the medicine obliquely upward and backward to the pterygoid ligament;

[0017] Step S4: Retract the needle to the submucosal area at the corner of the mouth, remove the syringe containing the injected medication, and leave the needle tip in the submucosal area;

[0018] Step S5: Use the snap-fit ​​mechanism to release the snap-fit ​​mechanism from the needle, remove the used infusion cartridge, and then replace it with an infusion cartridge containing another drug.

[0019] Step S6: Inject another drug into the submucosal cavity of the same side of the mouth using the methods of steps S1 to S4.

[0020] Step S7: Remove the syringe and injection needle;

[0021] Step S8: Inject submucosal tissue into the other side of the cheek using the methods described in steps S1 to S7.

[0022] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0023] 1. By adding a snap-fit ​​mechanism, the needle can be quickly disassembled without the need for medical staff to pull it out laboriously. Moreover, during the process of removing the needle, it is not necessary to put your hand into the patient's mouth. The connecting tube can be detached by simply rotating the snap-fit ​​mechanism at the edge of the needle tube, which makes it convenient for medical staff to replace the syringe.

[0024] 2. This method involves repeated injections of medication into one cheek, requiring only one puncture of the mucosa. If there are lesions on both cheeks, this method can complete the full course of treatment with just two needle insertions, minimizing the pain of repeated mucosal punctures and improving patient comfort during treatment.

[0025] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0027] In the picture:

[0028] Figure 1 This is one of the three-dimensional structural schematic diagrams of a drug injector according to an embodiment of the present invention;

[0029] Figure 2 This is a second three-dimensional structural schematic diagram of a drug injector according to an embodiment of the present invention;

[0030] Figure 3 for Figure 2 Schematic diagram of the structure at point A in the middle;

[0031] Figure 4 for Figure 2 Schematic diagram of the structure at point B.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Syringe; 2. Dispensing cylinder; 3. Connecting cylinder; 4. Needle; 5. Push rod; 6. Piston head; 7. Sealing ring; 8. Guide block; 9. Guide groove; 10. Threaded ring; 11. Sliding rod; 12. Ring body; 13. Annular groove; 14. Dovetail block; 15. Dovetail groove.

[0034] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0035] The invention will now be described in further detail with reference to the accompanying drawings.

[0036] Please see Figure 1-4 As shown, this embodiment provides a local drug injector for both cheeks and its injection method, including an injection cylinder 1, a dispensing cylinder 2 connected to the front end of the injection cylinder 1, the dispensing cylinder 2 and the injection cylinder 1 being connected by heat fusion, a connecting cylinder 3 sleeved around the dispensing cylinder 2, the opening of the connecting cylinder 3 fitting against one side of the injection cylinder 1, a needle 4 connected to one end of the connecting cylinder 3 of the injection cylinder 1, a push rod 5 slidingly fitted in the hollow part of the injection cylinder 1, a piston head 6 fitted inside the injection cylinder 1 connected to the side of the push rod 5 facing the dispensing cylinder 2, the piston head 6 being used to push the drug liquid out from the dispensing cylinder 2, and a locking mechanism for locking the connecting cylinder 3 being provided around the injection cylinder 1.

[0037] A sealing ring 7 is provided on one side of the syringe 1, and one end of the connecting cylinder 3 is attached to one side of the sealing ring 7. The sealing ring 7 is made of rubber. The sealing ring 7 is provided to improve the sealing between the connecting cylinder 3 and the dispensing cylinder 2, and to prevent the subsequent liquid from flowing out from the gap.

[0038] A guide block 8 is connected to the inner wall of the connecting cylinder 3. A guide groove 9 that matches the guide block 8 is opened along the length of the liquid outlet cylinder 2. The guide block 8 is a rectangular block structure and the guide groove 9 is a rectangular groove structure. The setting of the guide block 8 and the guide groove 9 can make the installation position of the connecting cylinder 3 more accurate, and the setting of the rectangular block and the rectangular groove can further improve the stability during subsequent installation.

[0039] The locking mechanism includes a threaded ring 10 that rotates around the side of the syringe 1. One end of the syringe 1 is slidably fitted with a slide rod 11 that is threadedly engaged with the threaded ring 10. The connecting cylinder 3 has locking grooves in two directions around its side that are adapted to the slide rod 11. The slide rod 11 and the locking grooves can fix the position of the connecting cylinder 3, making the position of the connecting cylinder 3 more stable and preventing the connecting cylinder 3 from falling off from the dispensing cylinder 2 in the future.

[0040] A first planar thread is provided below the threaded ring 10, and a second planar thread adapted to the first planar thread is provided above the slide rod 11. A ring body 12 with a T-shaped cross-section is connected to the inner wall of the threaded ring 10. An annular groove 13 adapted to the ring body 12 is provided on the periphery of the injection cylinder 1. The ring body 12 and the annular groove 13 prevent the threaded ring 10 from being suspended and improve the stability of the threaded ring 10. Friction texture is provided on the outer wall of the threaded ring 10. The friction texture is a diagonal texture. The self-locking property of the first planar thread and the second planar thread can improve the stability of the slide rod 11 sliding.

[0041] A dovetail block 14 is connected above the slide rod 11. A dovetail groove 15 that matches the dovetail block 14 is provided on one side of the cylinder. The dovetail groove 15 and the dovetail block 14 prevent the slide rod 11 from being suspended in the air, thereby improving the sliding stability of the slide rod 11. All parts used in this product are made of plastic.

[0042] A method for local drug injection into both cheeks includes the following steps:

[0043] Step S1: First, insert the syringe containing the drug 1cm backward from one corner of the mouth to the submucosal area of ​​the cheek. Then, while inserting the needle horizontally backward, push the drug to the front of the pterygomandibular ligament.

[0044] Step S2: Then retract the needle tip to the submucosal part of the insertion point, and push the medicine while inserting the needle obliquely downward and backward to the pterygoid ligament.

[0045] Step S3: Withdraw the needle back to the submucosal area at the corner of the mouth, then push the medicine obliquely upward and backward to the pterygoid ligament;

[0046] Step S4: Retract the needle to the submucosal area at the corner of the mouth, remove the syringe containing the injected medication, and leave the needle tip 4 in the submucosal area.

[0047] Step S5: Use the snap-fit ​​mechanism to release the snap-fit ​​mechanism from the needle 4, remove the used infusion cartridge, and then replace it with an infusion cartridge containing another drug.

[0048] Step S6: Inject another drug into the submucosal cavity of the same side of the mouth using the methods of steps S1 to S4.

[0049] Step S7: Remove the syringe and injection needle 4;

[0050] Step S8: Inject submucosal tissue into the cheek using the methods described in steps S1 to S7.

[0051] This invention is not limited to the embodiments described above. Anyone should understand that structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention. Technical aspects, shapes, and structures not described in detail in this invention are all publicly known technologies.

Claims

1. A dual cheek local drug injector characterized in that, The utility model relates to an injection device, which comprises: an injection barrel (1) having a front end connected a liquid outlet barrel (2) sleeved with a connecting barrel (3) on the periphery, the connecting barrel (3) being attached to one side of the injection barrel (1), the connecting barrel (3) of the injection barrel (1) being connected with a needle (4) at one end, a push rod (5) being slidably fitted in the hollow part of the injection barrel (1), the push rod (5) being connected with a piston head (6) attached to the inside of the injection barrel (1) at the side facing the liquid outlet barrel (2), and the periphery of the injection barrel (1) being provided with a clamping mechanism for clamping the connecting barrel (3); a guide block (8) being connected to the inner wall of the connecting barrel (3), a guide groove (9) being formed in the length direction of the liquid outlet barrel (2) and being matched with the guide block (8), wherein the guide block (8) is a rectangular block structure and the guide groove (9) is a rectangular groove structure; the clamping mechanism comprising a threaded ring (10) rotating on the periphery of the injection barrel (1), a slide rod (11) being slidably fitted in the injection barrel (1) and being threadedly matched with the threaded ring (10), and two clamping grooves being formed in the periphery of the connecting barrel (3) and being matched with the slide rod (11); a first flat thread being formed below the threaded ring (10), a second flat thread being formed above the slide rod (11) and being matched with the first flat thread, a ring body (12) with a T-shaped cross section being connected to the inner wall of the threaded ring (10), and a ring-shaped groove (13) being formed in the periphery of the injection barrel (1) and being matched with the ring body (12); the clamping mechanism can quickly disassemble the needle without the need for medical staff to laboriously pull it out, and the medical staff does not need to put their hands into the patient's oral cavity, but can directly rotate the clamping mechanism at the edge of the injection barrel (1) to make the connecting barrel fall off, thereby facilitating the replacement of the injection barrel by the medical staff.

2. A dual-cheek local drug injector according to claim 1, characterized in that, a sealing ring (7) being arranged on one side of the injection barrel (1), and one end of the connecting barrel (3) being attached to one side of the sealing ring (7).

3. The dual-cheek local drug injector of claim 1, wherein, a dovetail block (14) being connected above the slide rod (11), and a dovetail groove (15) being formed in one side of the barrel body and being matched with the dovetail block (14).

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