Multi-runner bone nail injection suite

Abstract

The utility model discloses a multi-runner bone nail injection suite which comprises a bone nail and a microtube, a fluid channel is formed in the center of an inner cavity of the bone nail in the length direction of the bone nail, and the fluid channel can be connected with the microtube in a matched and inserted mode so that liquid guided in from the microtube can flow into a cranial cavity through the fluid channel; the fluid channel comprises a plurality of sub-runners which are communicated with one another, the radius of each sub-runner is gradually reduced along the length direction of the bone nail, and each sub-runner can be correspondingly matched and inserted with a micro-tube with the corresponding radius. The device fixes the liquid guide micro-tube through the fixing function of the bone nail, and the problem that injection in skull marrow is not firm in fixation and is easy to fall off by a common micro-needle is solved. And the runner in the bone nail consists of the sub-runners with different radiuses, and different diameters can correspond to micro-tubes with different diameters, so that the operation of frequently replacing the bone nail during injection is avoided, and the injury to the skull of the mouse is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bone nails, in particular to a multi-channel bone nail injection kit. Background Art

[0002] In recent years, studies have found that there is communication between the bone marrow cavity in the skull and the dura mater under the skull and the brain tissue, forming a "skull bone marrow-dura mater-brain tissue" channel. Once there is injury or inflammation in the brain, myeloid cells including monocytes, macrophages and neutrophils in the skull bone marrow cavity can enter the brain tissue along the "skull bone marrow-dura mater-brain tissue" channel to participate in the inflammatory response. The above research findings have opened up a new idea for drug delivery in the human body, that is, directly delivering drugs through a pipeline to the inflammation site for treatment.

[0003] For this idea, mainly mice are used as experimental subjects for research. The conventional method is to directly open an injection hole in the skull of the mouse and insert a catheter directly to deliver the injection solution. However, due to the lack of corresponding fixation of the catheter, it is easy to fall off during the injection process. In view of this phenomenon, bone nails are also used in cooperation with the catheter to achieve the effect of infusion.

[0004] However, the injection channels in the current bone nails are relatively single, that is, there is only one flow channel with a fixed diameter in the bone nail, and this flow channel can only match a catheter with one diameter. During the experiment, different diameters of catheters may be used for different injection liquids or different injection volumes, and the single-sized flow channel will not be able to match and adapt. Therefore, it is necessary to replace the bone nail, and replacing the bone nail is not only cumbersome in operation, but also increases the damage to the mouse skull, which is not conducive to the progress of the experiment. Content of the Utility Model

[0005] The purpose of the utility model is to provide a multi-channel bone nail injection kit to solve the technical problems in the existing device.

[0006] To solve the above technical problems, the utility model specifically provides the following technical solution: A multi-channel bone nail injection kit includes a bone nail and a microtube. A fluid channel is opened along the length direction of the center of the inner cavity of the bone nail, and the fluid channel can be inserted into the microtube in a matching manner so that the liquid introduced from the microtube can flow into the cranial cavity through the fluid channel.

[0007] Among them, the fluid channel includes several mutually connected shunt channels, and the radius of each shunt channel gradually decreases along the length direction of the bone nail, and each shunt channel can be inserted into the microtube with a corresponding radius in a matching manner.

[0008] As a preferred embodiment of the present utility model, the bone nail comprises a nail body and a nail cap, the fluid channel is arranged in the inner cavity of the bone nail, and a cross groove communicating with the fluid channel is formed on the surface of the nail cap;

[0009] An external thread is arranged on the outer side wall of the nail body along its length direction.

[0010] As a preferred embodiment of the present utility model, one end of the nail body away from the nail cap is arranged in an arrow shape, a plurality of diversion holes are formed on the outer wall of the tip of the nail body, the diversion holes communicate with the fluid channel, and the length of the fluid channel is less than the length of the nail body.

[0011] As a preferred embodiment of the present utility model, an included angle exists between each of the diversion holes and the fluid channel, and the angle range of the included angle is 15°-30°.

[0012] As a preferred embodiment of the present utility model, the radius of the microtube is smaller than the radius of the corresponding shunt channel, an anti-seepage plastic rubber ring is sleeved on the outside of the microtube, and the radius of the anti-seepage plastic rubber ring is the same as the radius of the shunt channel corresponding to the microtube.

[0013] The present utility model has the following beneficial effects compared with the prior art:

[0014] The device fixes the liquid guiding microtube through the fixing function of the bone nail. The conventional micro-needle cranial bone marrow injection has the problems of insecure fixation and easy detachment. Moreover, the flow channel in the bone nail is composed of shunt channels with different radii, and different diameters can correspond to microtubes with different diameters, avoiding the operation of frequently replacing the bone nail during injection and reducing the damage to the mouse cranial bone. Description of the Drawings

[0015] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained according to the provided drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 For the present utility model Figure 1 It is a schematic diagram of the cross-sectional structure of the bone nail;

[0018] Figure 3 For the present utility model Figure 1 It is a schematic diagram of the cross-sectional structure of the bone nail with diversion holes;

[0019] The reference numerals in the figures are respectively as follows:

[0020] 1. Bone nail; 11. Nail body; 12. Nail cap; 13. External thread; 2. Microtube; 3. Fluid channel; 31. Shunt channel; 4. Diversion hole; 5. Cross slot; 6. Anti-seepage plastic rubber ring. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0022] As Figures 1-3 shown, a multi-channel bone nail injection kit includes a bone nail 1 and a microtube 2. A fluid channel 3 is provided along the central axis of the inner cavity of the bone nail 1 in its own length direction. The fluid channel 3 can be inserted into the microtube 2 in a matching manner, so that the liquid introduced from the microtube 2 can flow into the cranial cavity through the fluid channel 3;

[0023] Among them, the fluid channel 3 includes several mutually connected shunt channels 31. The radius of each shunt channel 31 gradually decreases along the length direction of the bone nail 1. Each shunt channel 31 can be inserted into the corresponding microtube 2 with a corresponding radius in a matching manner.

[0024] This device fixes the liquid guiding microtube through the fixing function of the bone nail. The ordinary micro needle is not firmly fixed during the injection into the cranial bone marrow and is prone to falling off. Moreover, the flow channel in the bone nail is composed of shunt channels with different radii, and different diameters can correspond to different diameters of microtubes, avoiding the operation of frequently replacing the bone nail during the injection and reducing the damage to the mouse cranial bone.

[0025] Among them, the arrow in the attached drawing indicates the direction of fluid flow.

[0026] Specifically, as Figures 1-3 shown, the bone nail 1 includes a nail body 11 and a nail cap 12. The fluid channel 3 is arranged in the inner cavity of the bone nail 1. A cross slot 5 communicating with the fluid channel 3 is provided on the surface of the nail cap 12;

[0027] An external thread 13 is provided on the outer side wall of the nail body 11 along its own length direction.

[0028] Among them, the diameter of the nail cap 12 is 3.8 mm and the height is 0.5 mm.

[0029] The diameter of the nail body 11 is 2 mm and the height is 3 mm.

[0030] Such a setting facilitates the installation and fixation of the bone nail 1. During installation, the whole bone nail 1 can be screwed in by inserting a tool into the cross slot 5 and rotating it. Moreover, the nail body 11 has a rotary thread, which is conducive to the tight connection between the bone nail 1 and the skull, preventing the bone nail 1 from falling off the skull and the exudation of drugs from the periphery where the nail is embedded in the skull. After installation, the insertion joint between the bone nail 1 and the skull can be sealed with dental cement or glue.

[0031] Since the microtube 2 is directly inserted into each flow channel 31, when the diameter of the microtube 2 matches the bottommost flow channel 31, the microtube 2 may directly pass through the entire nail body 11, and the protruding microtube 2 may cause damage to the intracranial tissues of the mouse. Moreover, it is rather troublesome to control the insertion depth of the microtube 2. Therefore, the liquid outlet end of the fluid channel 3 needs to be adjusted.

[0032] Specifically, as Figures 1-3 shown, one end of the nail body 11 away from the nail cap 12 is arranged in an arrow shape, and a plurality of diversion holes 4 are opened on the outer wall of the tip of the nail body 11. The diversion holes 4 communicate with the fluid channel 3, and the length of the fluid channel 3 is less than the length of the nail body 11.

[0033] Furthermore, as Figure 3 shown, there is an included angle between each diversion hole 4 and the fluid channel 3, and the angle range of the included angle is 15° - 30°.

[0034] Due to the inclined setting between the diversion hole 4 and the fluid channel 3, when the microtube 2 is inserted straight, it can only reach the bottom of the fluid channel 3 at most, and the bottom of the fluid channel 3 is closed. Therefore, the microtube 2 will not protrude, that is, the liquid led out by the microtube 2 reaching the bottom will flow out from the diversion hole 4.

[0035] Specifically, as Figure 1 shown, the radius of the microtube 2 is smaller than the radius of the corresponding flow channel 31, and an anti-seepage plastic rubber ring 6 is sleeved on the outside of the microtube 2. The radius of the anti-seepage plastic rubber ring 6 is the same as the radius of the flow channel 31 corresponding to the microtube 2.

[0036] This can further ensure the tightness of the connection between the microtube 2 and the flow channel 31, thereby reducing the possibility of the injection liquid leaking out.

[0037] The above embodiments are only exemplary embodiments of the present application and do not limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A multi-channel bone screw injection kit, characterized in that: It comprises a bone screw (1) and a microtube (2), wherein a fluid channel (3) is provided at the center of the inner cavity of the bone screw (1) along its length direction, and the fluid channel (3) can be plugged with the microtube (2) so that the liquid introduced from the microtube (2) can flow into the cranial cavity through the fluid channel (3); The fluid channel (3) comprises a plurality of mutually connected shunt channels (31), the radius of each shunt channel (31) gradually decreases along the length direction of the bone screw (1), and each shunt channel (31) can be correspondingly matched and plugged into the microtube (2) of the corresponding radius.

2. A multi-channel bone screw injection kit according to claim 1, characterized in that: The bone screw (1) comprises a screw body (11) and a screw cap (12); the fluid channel (3) is arranged in the inner cavity of the bone screw (1); and a cross groove (5) communicating with the fluid channel (3) is provided on the surface of the screw cap (12); The outer wall of the nail body (11) is provided with an external thread (13) along its length direction.

3. A multi-channel bone screw injection kit according to claim 2, characterized in that: The end of the nail body (11) away from the nail cap (12) is arranged in an arrow shape, and a plurality of guide holes (4) are provided on the outer wall of the tip of the nail body (11), the guide holes (4) are in communication with the fluid channel (3), and the length of the fluid channel (3) is shorter than the length of the nail body (11).

4. A multi-channel bone screw injection kit according to claim 3, characterized in that: Each of the flow guide holes (4) has an angle with the fluid channel (3), and the angle range of the angle is 15°-30°.

5. The multi-channel bone screw injection kit according to claim 1, characterized in that: The radius of the microtube (2) is smaller than the radius of the corresponding branch channel (31), and an impermeable plastic rubber ring (6) is sleeved on the outside of the microtube (2), and the radius of the impermeable plastic rubber ring (6) is the same as the radius of the corresponding branch channel (31) of the microtube (2).

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