Medical dura mater glue injector

Abstract

The utility model discloses a medical dura mater glue injector. The medical dura mater glue injector comprises a push plate, a clamping plate, an injector and a spray head module, the injectors comprise the first injector and the second injector, two kinds of raw materials of dura mater medical glue are preset, the raw materials in the injectors can be rapidly sent out under the action of the push plate, and the two kinds of raw materials can react immediately after flowing into the spray head module and are injected to the designated position. According to the dura mater medical glue injector, the functions of raw material reaction and injection are integrated on the basis of the same injector body, the mixing proportion of all raw material components can be guaranteed, waste of raw materials is reduced, the overall operation time is shortened, and the operation efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a dura mater medical glue injector. Background Technology

[0002] Cerebrospinal fluid (CSF) is a colorless, transparent fluid found in the ventricles and subarachnoid space of the brain. Sealed by the dura mater, it functions as lymphatic fluid in the central nervous system, supplying nutrients to brain cells, removing metabolic waste products, regulating the acid-base balance of the central nervous system, and protecting and supporting the brain and spinal cord. Damage to the dura mater leads to CSF ​​leakage. Common surgical treatments involve suturing with continuous or interrupted sutures and repairing the defect with dura mater replacements. Despite surgical repair of the damaged area, the incidence of postoperative CSF leakage remains high, exceeding 10%. Therefore, using medical adhesive on surgical sutures or gaps can effectively prevent the risk of CSF leakage.

[0003] These medical adhesives consist of a polyethylene glycol (PEG) reactive ester solution and a crosslinking agent solution. The PEG reactive ester includes polymers containing succinimide groups, such as four-armed or eight-armed polyethylene glycol succinimide succinate. The crosslinking agent solution is generally composed of amino acids or polymers containing multiple amino groups, such as trilysine, polylysine, and polyethyleneimine. After the PEG reactive ester and amino polymer react, a network-structured hydrogel is formed within tens of seconds and adheres firmly to the suture or gap, working together with the substitute to withstand the pressure of cerebrospinal fluid and prevent leakage. After the ester bonds in the above-mentioned medical adhesive are hydrolyzed, the network structure disintegrates and eventually degrades into small molecules that are excreted from the body through metabolism.

[0004] During the surgery, medical adhesive for the dura mater needs to be injected into the designated area. However, the biggest characteristic of these two solutions is that they react quickly and solidify within a very short contact time. Therefore, there is an urgent need for a device that can mix the two solutions and apply them to the designated area before they solidify. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a dura mater medical adhesive injector that is convenient and quick to operate, and has the advantages of integrating solution reaction and injection. The two raw materials of dura mater medical adhesive can be pre-placed in the injector, so that the two raw materials of dura mater medical adhesive can react quickly during the operation and be injected rapidly according to the needs of the operation, reducing the waste of raw materials and shortening the operation time.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dura mater medical adhesive injector, comprising: a push plate, a clamping plate, a syringe, and a nozzle module. The syringe includes a first syringe and a second syringe, one end of which is threadedly connected to the nozzle module, and the other end is provided with a push-pull rod capable of piston movement. The push-pull rod is fixed in the push plate. The outer wall of the syringe near the push plate has an outer wall flange, and the clamping plate is sleeved on the outer wall flange to fix the first syringe and the second syringe. The nozzle module includes an atomizing nozzle, a fluid buffer mechanism, and... The flow guiding mechanism and the fluid buffer mechanism are connected at one end to the atomizing nozzle and at the other end to the flow guiding mechanism. The flow guiding mechanism includes a flow guiding body and a fluid channel cover. Two fluid channels are provided in the space enclosed by the flow guiding body and the fluid channel cover, which are respectively connected to the first syringe and the second syringe. The fluid channel cover and the flow guiding mechanism are fixedly connected by ultrasonic bonding and buckle. The dura mater medical adhesive is a mixture of polyethylene glycol active ester solution and crosslinking agent solution. The first syringe contains one substance of the dura mater medical adhesive, and the second syringe contains another substance different from that in the first syringe.

[0007] In some embodiments, the fluid buffer mechanism has a through hole, and a circular fixing member is provided inside the through hole. The circular fixing member has two symmetrical notches, and a plunger is provided at the center of the circular fixing member. The plunger is located at one end of the fluid buffer mechanism near the atomizing nozzle.

[0008] In some embodiments, the surface of the fluid buffer mechanism is provided with raised strips to increase friction when loading and unloading the fluid buffer mechanism.

[0009] In some embodiments, the atomizing nozzle includes a nozzle body, a nozzle orifice at the front end of the nozzle body, a fluid collection cavity inside the nozzle body, and several thin flow channels forming a vortex inside the fluid collection cavity, the several thin flow channels communicating with the nozzle orifice.

[0010] In some embodiments, the clamping plate includes a clamping portion and a bending portion. The bending portion is located at the ends of both sides of the clamping portion and has a certain curvature. The clamping portion has a long groove in the middle. The middle part of the cross-section of the long groove is rectangular, and the two sides are semicircular to match the first syringe and the second syringe.

[0011] In some embodiments, one end of the push-pull rod is provided with a push-pull plate, the push plate is provided with a limiting groove communicating with one side wall of the push plate, the push-pull plate is installed in the limiting groove, and the inner side of the top wall of the push plate is also provided with a limiting block for limiting the push-pull plate. The limiting block has an inclined surface, and the angle between the inclined surface and the inner side of the top wall is an acute angle.

[0012] In some embodiments, the push plate is made of plastic and has several push plate through holes that facilitate injection molding.

[0013] The beneficial effects of this invention are as follows: the dura mater medical adhesive injector is equipped with two syringes, and two raw materials of dura mater medical adhesive are pre-filled into the two syringes, so that the dura mater medical adhesive injector has the functions of material reaction and injection. During the operation, the injection can be completed before the dura mater medical adhesive solidifies. The whole process is fast and quick, shortening the overall operation time, improving the efficiency of the operation, and saving valuable treatment time for the patient. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of an embodiment of the medical glue injector for the dura mater of this utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the exploded structure of a dura mater medical glue injector shown;

[0016] Figure 3 for Figure 2 A schematic diagram of the push plate of the dura mater medical glue injector shown;

[0017] Figure 4 for Figure 2 A schematic diagram of the clamping plate of the dura mater medical glue injector shown;

[0018] Figure 5 for Figure 2 A schematic diagram of the fluid buffer mechanism of the dura mater medical glue injector shown;

[0019] Figure 6 for Figure 2 The diagram shows the structure of the fluid collection cavity of the dura mater medical glue injector. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0021] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0022] Please refer to Figures 1-6 , Figure 1This is a three-dimensional structural schematic diagram of an embodiment of the dura mater medical glue injector of this utility model; Figure 2 yes Figure 1 A schematic diagram of the exploded structure of a dura mater medical glue injector shown; Figure 3 yes Figure 2 A schematic diagram of the push plate of the dura mater medical glue injector shown;

[0023] Figure 4 yes Figure 2 A schematic diagram of the clamping plate of the dura mater medical glue injector shown; Figure 5 yes Figure 2 A schematic diagram of the fluid buffer mechanism of the dura mater medical glue injector shown; Figure 6 yes Figure 2 The diagram shows the structure of the fluid collection cavity of the dura mater medical glue injector.

[0024] This embodiment provides a dura mater medical glue injector, such as... Figure 1 As shown, it includes a push plate 1, a clamping plate 2, a syringe 3, and a nozzle module 4.

[0025] The dura mater medical adhesive is a mixture of two raw materials: a polyethylene glycol active ester solution and a crosslinking agent solution. The syringe 3 and the nozzle module 4 are the main components of the dura mater medical adhesive injector. They serve to pre-mix and store the two raw materials of the dura mater medical adhesive, and are fixed in the push plate 1 by the clamping plate 2 for easy injection by the user. The syringe 3 is also connected to the nozzle module 4. After the user applies force to the push plate 1, the two raw materials stored in the syringe 3 flow out, pass through the nozzle module 4, and react there, finally spraying the dura mater medical adhesive onto the designated area.

[0026] like Figure 1 and Figure 2As shown, the syringe 3 includes a first syringe 31 and a second syringe 32. One end of the first syringe 31 and the second syringe 32 are respectively provided with a first push-pull rod 311 and a second push-pull rod 321. The other end of the first push-pull rod is provided with a first push-pull plate 312, and the other end of the second push-pull rod is provided with a second push-pull plate 322. The end of the first syringe 31 near the first push-pull rod 311 is provided with a first outer wall flange 313, and the end of the second syringe 32 near the second push-pull rod 321 is provided with a second outer wall flange 323. The clamping plate 2 is sleeved on the first outer wall flange 313 and the second outer wall flange 323. The first push-pull plate 312 and the second push-pull plate 322 are fixed in the push plate 1, both of which play a role in fixing the first syringe 31 and the second syringe 32. The nozzle module 4 includes a flow guiding mechanism 41, a fluid buffer mechanism 42, and an atomizing nozzle 43. One end of the fluid buffer mechanism 42 is connected to the flow guiding mechanism 41, and the other end is connected to the atomizing nozzle 43, both being threaded connections. The flow guiding mechanism 41 includes a flow guiding body 411 and a fluid channel cover 412. The flow guiding body 411 has a snap-fit ​​groove 4111, and the fluid channel cover 412 has a corresponding snap-fit ​​protrusion 4121. The flow guiding body 411 and the fluid channel cover 412 are fixedly connected by ultrasonic coupling snap-fit, which improves the stability of the connection between the flow guiding body 411 and the fluid channel cover 412. Two fluid channels are provided within the space enclosed by the flow guiding body 411 and the fluid channel cover 412. The first syringe 31 and the second syringe 32, at their ends away from the push plate 1, are connected to the flow guiding body 411 of the flow guiding mechanism 41 via threads. The atomizing nozzle 43 includes a nozzle body 431, which has a fluid collection cavity 432 and a spray hole 4311 at its front end. The two raw materials stored in the first syringe 31 and the second syringe 32 can flow through the flow guiding mechanism 41 via two separate flow channels. After the flow rate is reduced in the fluid buffer mechanism 42, they converge in the fluid collection cavity 432 of the atomizing nozzle 43 and react to form dura mater medical adhesive, which finally reaches the nozzle body 431. This achieves the function of integrating raw material reaction and injection, and the injection can be completed immediately after the raw material reaction is completed, saving time.

[0027] like Figure 3As shown, in this embodiment, the push plate 1 includes a limiting groove 11, a limiting block 12, a side wall 13, a top wall 14, and a push plate through hole 15. There are two sets of limiting grooves 11, which are connected to the side wall 13 and are used to limit the first push-pull plate 312 and the second push-pull plate 322 to prevent the first syringe 31 and the second syringe 32 from swinging and affecting the injection operation. Correspondingly, there are also two sets of limiting blocks 12, which are set inside the top wall 14 of the push plate 1 and adjacent to the side wall 13. The limiting block 12 also has an inclined surface 121, and the angle between the inclined surface 121 and the inner side of the top wall 14 is an acute angle, which helps the first push-pull plate 312 and the second push-pull plate 322 to be pushed into the limiting groove 11 to complete the assembly of the injector, and can also effectively prevent the first syringe 31 and the second syringe 32 from falling off after assembly. The number of through holes 15 in the push plate makes the push plate 1 easy and quick to manufacture in the injection molding process, which is beneficial to the mold making and can also reduce the weight of the body of the dura mater medical glue injector.

[0028] like Figure 4 As shown, in this embodiment, the clamping plate 2 includes a clamping part 21 and a bending part 22. There are two bending parts 22, which are located on both sides of the clamping part 21 and have a certain curvature, providing a point of leverage for the user and preventing the injector from slipping from their hand during force application. The clamping part 21 has a long groove 211 in the middle. The middle of the cross-section of the long groove 211 is rectangular, and the two sides are semicircular, matching the first injector 31 and the second injector 32. A guide plate 212 is provided along the edge of the long groove 211. Two sets of protruding ribs 2121 are provided on the inner surface of the guide plate 212, and they are aligned with the junction of the rectangle and the two semicircles, which can strengthen the fixation of the first injector 31 and the second injector 32.

[0029] like Figure 5As shown, in this embodiment, the fluid buffer mechanism 42 includes a through hole 421, a circular fixing member 422, a plunger 423, and a protrusion 424. Fluid can flow through the through hole 421 to the fluid collection cavity 432. A circular fixing member 422 is provided inside the through hole 421. The circular fixing member 422 has two symmetrical notches 4221 and 4222. When the fluid flows through the circular fixing member 422, it can only flow out of the fluid buffer mechanism 42 from these two symmetrical notches 4221 and 4222, which can block most of the fluid and thus reduce the fluid flow rate. A plunger 423 is also provided at the center of the circular fixing member 422 and is located at one end of the fluid buffer mechanism 42 near the atomizing nozzle 43. This further serves to divert the fluid to the side wall and make the fluid flow slowly down from the side wall of the fluid collection cavity 432 to the nozzle 4311. This can make the overall speed of the dura mater medical adhesive fluid in the injector stable and the supply of dura mater medical adhesive stable. The outer surface of the fluid buffer mechanism is provided with several protrusions 424, which can increase friction and increase the force points when installing the fluid buffer mechanism 42, which is beneficial to the assembly of the structure.

[0030] like Figure 6 As shown, in this embodiment, the fluid collection cavity 432 includes thin flow channels 4321. There are several thin flow channels 4321, which are arranged in a vortex shape. One end of all thin flow channels 4321 is connected to the nozzle 4311, which plays the role of guiding the flow and ensuring a stable supply of dura mater medical adhesive at the nozzle 4311.

[0031] The above describes the structural composition, connection relationship, and function of each component in this embodiment. The specific working process of the dura mater medical glue injector will be explained below in conjunction with this embodiment.

[0032] In this embodiment, the first syringe 31 and the second syringe 32 are pre-filled with two raw materials of dura mater medical adhesive according to the required mixing ratio. When the dura mater medical adhesive needs to be injected, the user can place the index and middle fingers on the curved parts 22 on both sides of the clamping plate 2, and place the thumb on the top of the push plate 1, and then apply a downward force to the push plate 1. The push plate 1 drives the first push-pull plate 312 of the first syringe 31 and the second push-pull plate 322 of the second syringe 32 to move downward, so that the two raw materials pre-filled in the first syringe 31 and the second syringe 32 flow through the two flow channels provided by the flow guiding mechanism 41 into the through hole 421 of the liquid buffer mechanism 42. Most of the fluid is blocked by the circular fixing member 422 and gathers above the circular fixing member 422. At this time, the two raw materials begin to... The mixture reacts and slowly flows through the symmetrical notches 4221 and 4222 on the circular fixing member 422. Under the obstruction of the plunger 423, it flows into the fluid collection cavity 432 along the side wall of the through hole 421 and the plunger 423. Under the guidance of several thin flow channels 4321 at the bottom of the fluid collection cavity 432, it gathers at a stable flow rate above the spray hole 4311 at the front end of the nozzle body 431. The two raw materials react completely here and generate dura mater medical adhesive. As the push plate 1 continues to move downward, the dura mater medical adhesive is sprayed out through the spray hole 4311 to the designated position outside the injector, achieving the purpose of quickly reacting and injecting the two raw materials.

[0033] The beneficial effects of this invention are as follows: the dura mater medical adhesive injector is equipped with two syringes, and two raw materials of dura mater medical adhesive are pre-filled into the two syringes, so that the dura mater medical adhesive injector has the functions of material reaction and injection. During the operation, the injection can be completed before the dura mater medical adhesive solidifies. The whole process is fast and quick, shortening the overall operation time, improving the efficiency of the operation, and saving valuable treatment time for the patient.

[0034] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A dura mater medical glue injector, characterized in that, include: The device comprises a push plate, a clamping plate, a syringe, and a nozzle module. The syringe includes a first syringe and a second syringe. One end of the first syringe and the second syringe are threadedly connected to the nozzle module, and the other end is provided with a push-pull rod capable of piston movement. The push-pull rod is fixed in the push plate. The outer wall of the syringe near the push plate has an outer wall flange. The clamping plate is sleeved on the outer wall flange to fix the first syringe and the second syringe. The nozzle module includes an atomizing nozzle, a fluid buffer mechanism, and a flow guiding mechanism. One end of the fluid buffer mechanism is connected to the atomizing nozzle, and the other end is connected to the flow guiding mechanism. The flow guiding mechanism includes a flow guiding body and a fluid channel cover. Two fluid channels are provided in the space enclosed by the flow guiding body and the fluid channel cover, which communicate with the first syringe and the second syringe respectively. The fluid channel cover and the flow guiding mechanism are fixedly connected by ultrasonic waves and a snap-fit ​​method. The first syringe contains one of the substances in the dura mater medical adhesive, and the second syringe contains another substance different from that in the first syringe.

2. The dura mater medical glue injector according to claim 1, characterized in that, The fluid buffer mechanism has a through hole, and a circular fixing member is provided inside the through hole. The circular fixing member has two symmetrical notches, and a plunger is provided at the center of the circular fixing member. The plunger is located at one end of the fluid buffer mechanism near the atomizing nozzle.

3. The dura mater medical glue injector according to claim 1, characterized in that, The surface of the fluid buffer mechanism is provided with raised strips to increase friction when installing or removing the fluid buffer mechanism.

4. The dura mater medical glue injector according to claim 1, characterized in that, The atomizing nozzle includes a nozzle body, a spray hole at the front end of the nozzle body, a fluid collection cavity inside the nozzle body, and several thin flow channels forming a vortex inside the fluid collection cavity, which are connected to the spray hole.

5. The dura mater medical glue injector according to claim 1, characterized in that, The clamping plate includes a clamping part and a bending part. The bending part is located at the ends of both sides of the clamping part and has a certain curvature. The clamping part has a long groove in the middle. The middle part of the cross-section of the long groove is rectangular, and the two sides are semicircular to match the first syringe and the second syringe.

6. The dura mater medical glue injector according to claim 5, characterized in that, The elongated groove is provided with a guide plate at its edge, and the inner surface of the guide plate is provided with a raised ridge. There are two sets of raised ridges, which are aligned with the junction of the rectangle and the two semicircles on both sides.

7. The dura mater medical glue injector according to claim 1, characterized in that, One end of the push-pull rod is provided with a push-pull plate. The push plate is provided with a limiting groove that communicates with one side wall of the push plate. The push-pull plate is installed in the limiting groove. The inner side of the top wall of the push plate, adjacent to the side wall, is also provided with a limiting block for limiting the push-pull plate. The limiting block has an inclined surface, and the angle between the inclined surface and the inner side of the top wall is an acute angle.

8. The dura mater medical glue injector according to claim 7, characterized in that, The push plate is made of plastic and has several push plate through holes that facilitate injection molding.

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