A guiding device for cranial injection

Abstract

The present application discloses a guide device for cranial injection, including a shell, a driving assembly installed on the shell, the driving assembly including a knob and a lifting block, the knob is rotatably installed on the upper part of the shell, and the knob and the lifting block are connected by threaded cooperation; a slide rail is provided on the side of the lifting block, and a protrusion that cooperates with the slide rail is provided on the inner wall of the shell, and the knob is used to control the lifting block to slide in the shell; an injection assembly is installed on the lifting block, the injection assembly includes a needle tube and a push pin for blocking the needle tube, the needle tube is fixedly installed on the lower part of the lifting block, and the push pin is plugged with the needle tube; a guide arm for supporting the shell is installed on the shell. Beneficial effects of the present application: the needle tube can be evenly moved up and down by threaded cooperation between the knob and the lifting block, which reduces the difficulty of the drug forming a drug column in the patient's brain; the push pin can block the needle tube to prevent brain tissue from being embedded in the needle tube; the scale on the device can accurately and clearly present the advancement distance of the needle tube to the doctor.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to a guiding device for cranial injection. Background Art

[0002] With the advancement of medical technology, human treatment of brain diseases is also deepening. Traditional brain treatment is often completed by patients taking oral medications. After the drugs are absorbed by the intestines, they can enter the pathological parts of the brain through the blood to exert their efficacy for treatment. However, in the process of transporting the drugs from the intestines to the brain, the efficacy of the drugs will inevitably be diluted, resulting in the inability of the drugs to enter the brain completely, affecting the efficacy of the drugs. Therefore, in order to improve the efficacy of the drugs, the drugs can be directly injected into the patient's brain to ensure that the efficacy can fully act on the pathological parts.

[0003] At present, the method of administering drugs to the brain is generally to drill a hole in the patient's skull and then use an injection needle to directly insert the drug into the brain. However, since the end of the needle is relatively sharp, it may cause damage to the brain nerves. In addition, in order to be more conducive to the treatment of patients, when injecting drugs, it is often necessary to continuously move the syringe upward so that the drug forms a drug column in the brain. Generally, the movement of the syringe is mainly operated directly by the doctor's hands, which relies too much on the doctor's experience. If the doctor does not operate it properly, it may cause greater harm to the patient. Therefore, there is an urgent need for a syringe guide device that can move accurately and smoothly. Summary of the invention

[0004] One of the purposes of the present application is to provide a guide device for cranial injection that can solve at least one of the defects in the above-mentioned background technology.

[0005] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a guide device for cranial injection, comprising a shell, a driving assembly is installed on the shell, the driving assembly comprises a knob and a lifting block, the knob is rotatably installed on the upper part of the shell, and the knob and the lifting block are connected by threaded cooperation; a slide rail is provided on the side of the lifting block, and a protrusion cooperating with the slide rail is provided on the inner wall of the shell, and the knob is used to control the lifting block to slide in the shell; an injection assembly is installed on the lifting block, the injection assembly comprises a needle tube and a push pin for blocking the needle tube, the needle tube is fixedly installed on the lower part of the lifting block, and the push pin is plugged into the needle tube; the needle tube at least partially extends out of the shell; a guide arm for supporting the shell is installed on the shell.

[0006] Compared with the prior art, the guide device for cranial injection of the present application has a knob and a lifting block installed on the shell; the knob and the lifting block are connected by threaded cooperation, and the lifting block can be controlled by the knob to rise at a uniform speed or to remain stationary; the doctor can turn the knob and inject in batches according to actual needs to ensure that a drug column can be formed in the patient's brain; when the knob is stationary, the needle tube connected to the lifting block can remain stationary to avoid the needle tube shaking in the patient's brain due to the doctor's hand shaking; in addition, the push needle can also seal the inner cavity of the needle tube to prevent dust from entering the needle tube.

[0007] Preferably, the push needle is provided with a needle handle, a limit block and a needle core in sequence from top to bottom; a connecting block is provided on the top of the needle tube, and a perforation is provided inside the connecting block; the needle core passes through the perforation and is plugged into the needle tube, the size of the limit block is larger than the size of the perforation, and the limit block is used to limit the insertion depth of the needle core; the length of the needle handle is larger than the sum of the lengths of the lifting block and the shell. Through the above arrangement, when the needle tube is pushed into the brain, the push needle can be inserted into the cavity of the needle tube, and the limit cooperation of the limit block and the connecting block can limit the push needle vertically downward, ensuring that the needle core will not slip out of the needle tube, thereby preventing the push needle from piercing the brain under the action of gravity and causing damage to the patient.

[0008] Preferably, the bottom of the needle tube is provided with a chamfered surface, the bottom of the needle core is provided with a curved surface, and the bottom of the needle core is close to the bottom of the needle tube; the size of the needle core is adapted to the inner cavity size of the needle tube, so that the needle core blocks the needle tube. With the above arrangement, when the needle tube is inserted into the patient's brain, the chamfer on the needle tube and the curved surface on the needle core can cooperate to squeeze the brain tissue, so as to prevent the needle tube from being too sharp and scratching the patient's brain.

[0009] Preferably, the side wall of the housing is provided with an annular limiting groove, the side of the knob is provided with a positioning hole aligned with the annular limiting groove, a ball is installed in the annular limiting groove, and the diameter of the ball is greater than the depth of the annular limiting groove; a sealing block is installed inside the positioning hole, and the sealing block is used to block the ball. In this way, the sealing block can block the ball in the annular limiting groove; because the diameter of the ball is greater than the depth of the annular limiting groove, a part of the ball can be located in the annular limiting groove, and the other part can be located in the positioning hole, thereby limiting the knob in the vertical direction.

[0010] Preferably, the upper part of the lifting block is provided with a sleeve ear, the knob is provided with a through hole, the lifting block is plugged into the through hole; the size of the sleeve ear is larger than the size of the through hole; the lifting block is provided with a plug hole, the push pin is plugged into the plug hole. The above arrangement prevents the lifting block from falling off the knob when the knob is turned excessively. In addition, the sleeve ear can also limit the initial position of the lifting block. When the sleeve ear fits the knob, it is the initial point position of the lifting block.

[0011] Preferably, the knob, the lifting block and the guide arm are provided with scales that can be converted to each other. With the above arrangement, the doctor does not have to rely entirely on experience to control the moving distance of the needle tube, and can accurately insert the needle tube into the patient's brain through the scale on the guide arm; during the injection process, the position of the needle tube can be fine-tuned through the knob and the scale on the lifting block to ensure that the drug can form a drug column in the patient's brain.

[0012] Preferably, a base is installed at the lower part of the housing, and a protective tube coaxial with the needle tube is arranged on the base, and the inner diameter of the protective tube is larger than the outer diameter of the needle tube, so that the needle tube can be plugged into the protective tube. Through the above arrangement, the protective tube can provide protection for the needle tube to prevent the needle tube from being bent due to direct collision with the lower part of the housing when the needle tube receives external force.

[0013] Preferably, the length of the protection tube is 10% to 20% of the length of the needle tube.

[0014] Preferably, the lower part of the guide arm is provided with a mounting opening, the upper part of the shell is provided with a limiting plate, the shell is mounted on the mounting opening, and the lower end of the limiting plate abuts against the upper end wall of the mounting opening. Through the above arrangement, the shell can be limited vertically downward by the limiting cooperation between the mounting opening and the limiting plate, and when the mounting opening and the shell are loose, the limiting plate can ensure that the shell will not slip out of the mounting opening.

[0015] Preferably, the guide arm is provided with a guide groove, and the guide arm moves along the long side direction of the guide groove. Through the above arrangement, a slider can be connected in the guide groove to limit the moving angle and moving range of the guide arm.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] The needle can be moved up and down by the knob and the thread of the lifting block. Turning the knob can make the lifting block drive the needle to move at a constant speed. When the knob stops turning, the needle can remain stable under the thread. The guide arm can ensure that the needle will not deflect when moving, which is convenient for the doctor's injection operation. In addition, the scales on the knob, lifting block and guide arm can more intuitively judge the moving distance of the needle.

[0018] By installing a matching push needle in the needle tube, the inner cavity of the needle tube can be blocked when the needle tube is pushed into the brain, preventing the needle tube from embedding brain tissue into the inner cavity and affecting the patient's brain; in addition, setting the ends of the push needle and the needle tube as curved surfaces can also prevent the needle tube and the push needle from scratching the brain when injecting drugs, further improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of this application.

[0020] Figure 2 This is a schematic diagram of the partial cross-sectional structure of the present application.

[0021] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle.

[0022] Figure 4 Schematic diagram of the exploded structure of the injection assembly in this application.

[0023] Figure 5 It is a schematic diagram of the partial structure of the injection assembly in this application.

[0024] Figure 6 This is a schematic diagram of the structure of the knob in this application.

[0025] Figure 7 This is a schematic diagram of the structure of the lifting block in this application.

[0026] Figure 8 This is a schematic diagram of the installation of the shell and the base in this application.

[0027] Fig. 9 It is a schematic diagram of the structure of the guide arm in this application.

[0028] In the figure: 1. shell; 11. annular limit groove; 12. limit plate; 13. positioning block; 100. slide rail; 101. raised part; 2. drive assembly; 21. knob; 22. lifting block; 200. ball bearing; 201. sealing block; 210. positioning hole; 211. through hole; 220. ear; 221. jack; 3. injection assembly; 31. needle tube; 32. push needle; 310. connecting block; 311. chamfered surface; 321. needle handle; 322. limit block; 323. needle core; 324. arc surface; 4. guide arm; 41. installation port; 42. guide groove; 43. positioning groove; 44. adjustment hole; 5. base; 51. protective tube. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0033] One aspect of the present application provides a guide device for cranial injection, such as Figure 1 , Figure 2 and Figure 3 As shown, one preferred embodiment includes a housing 1, on which a driving assembly 2 is installed, and the driving assembly 2 includes a knob 21 and a lifting block 22. The knob 21 is axially limited and installed on the upper part of the housing 1, and the knob 21 and the lifting block 22 are connected by threaded cooperation; a slide rail 100 is provided on the side of the lifting block 22, and a protrusion 101 for plugging and cooperating with the slide rail 100 is fixedly provided on the inner wall of the housing 1 to radially limit the lifting block 22; when the knob 21 is rotated, the lifting block 22 can be lifted and lowered under the threaded cooperation. In addition, the slide rail 100 can also limit the lifting range of the lifting block 22.

[0034] It should be noted that if relative displacement is to occur between two objects that are threaded together, one of the objects needs to be set as a fixed part and the other object needs to be set as a movable part; the knob 21 in the present application is a fixed part, and the lifting block 22 is a movable part. When the knob 21 is axially limited, rotating the knob 21 can drive the lifting block 22 to move axially through the thread.

[0035] It is understandable that by providing mutually matching threads on the inner side of the knob 21 and the outer side of the lifting block 22, the lifting block 22 can be evenly controlled to rise or fall by turning the knob 21, which is more conducive to accurately controlling the movement of the lifting block 22. It ensures that the drugs injected multiple times are connected end to end and form a drug column. The specific specifications and principles of the threads and pitches are well-known technologies to those skilled in the art, so they will not be elaborated in detail here.

[0036] Further, such as Figure 1 As shown, an injection assembly 3 is installed on the lifting block 22, and the injection assembly 3 includes a needle tube 31 for injection and a push pin 32 for blocking the needle tube 31. The needle tube 31 is fixedly installed at the lower part of the lifting block 22 so that the needle tube 31 can be lifted and lowered following the lifting block 22; the needle tube 31 at least partially extends out of the housing 1 so as to be inserted into the patient's brain for injection. In order to improve the stability of the needle tube 31 during the injection process, a guide arm 4 for supporting the housing 1 is installed on the housing 1.

[0037] Specifically, Figure 2 and Figure 4 As shown, the push needle 32 is provided with a needle handle 321, a limit block 322 and a needle core 323 from top to bottom in sequence; a connecting block 310 is provided on the top of the needle tube 31, and the needle tube 31 is connected to the lifting block 22 through the connecting block 310; a through hole connected to the inner cavity of the needle tube 31 is provided on the connecting block 310, and the needle core 323 passes through the through hole and is plugged into the needle tube 31; the size of the limit block 322 is larger than the size of the through hole, and the insertion depth of the needle core 323 in the needle tube 31 can be limited by the limiting cooperation between the limit block 322 and the through hole, thereby preventing the push needle 32 from sliding out of the needle tube 31 under the action of gravity and causing damage to the patient's brain. In actual operation, first insert the push needle 32 into the needle tube 31, then turn the knob 21 to drive the needle tube 31 to advance in the patient's brain. When the needle tube 31 reaches the designated point, stop turning the knob 21 and pull out the push needle 32 to perform the injection. When the injection of the point is completed, turn the knob 21 in the opposite direction to drive the needle tube 31 to move in the opposite direction to other points for injection, and repeat the above operation until a drug column is formed at the patient's pathological site.

[0038] It should be noted that, considering the applicability of the device, the connection between the lifting block 22 and the connecting block 310 can be set to be detachable, and the operator can replace the needle tube 31 of different specifications according to actual needs.

[0039] In addition, the length of the needle handle 321 should be greater than the sum of the lengths of the lifting block 22 and the housing 1 to ensure that the top of the needle handle 321 is always higher than the lifting block 22 .

[0040] It should be known that the bottom of the conventional needle tube 31 is usually a sharp slope, and the brain tissue contains a large number of nerves. If the conventional needle tube 31 is directly inserted into the brain tissue, it may cause damage to the nerve cells therein.

[0041] In view of the above situation, in this embodiment, if Figure 5 As shown, the bottom of the needle tube 31 is provided with a chamfered surface 311, the bottom of the needle core 323 is provided with a curved surface 324, and the bottom of the needle core 323 is close to the bottom of the needle tube 31; at the same time, in order to ensure that the needle tube 31 and the needle core 323 have good sealing after being plugged in, the width of the needle core 323 should be adapted to the width of the inner cavity of the needle tube 31, so as to prevent brain tissue from being embedded in the needle tube 31. When the needle tube 31 is pushed into the patient's brain, the chamfered surface 311 and the curved surface 324 can cooperate to squeeze the brain tissue to prevent the needle tube 31 from scratching the patient's brain.

[0042] In this embodiment, if Figure 2 and Figure 6 As shown, an annular limit groove 11 is installed on the side wall of the shell 1, and a positioning hole 210 cooperating with the annular limit groove 11 is provided on the side of the knob 21; the positioning hole 210 is aligned with the annular groove, and the ball 200 is placed in the annular limit groove 11 through the positioning hole 210; the diameter of the ball 200 should be greater than the depth of the annular limit groove 11, so that a part of the ball 200 is located in the annular limit groove 11, and the other part is located in the positioning hole 210; a sealing block 201 for sealing the ball 200 is installed in the positioning hole 210 to prevent the ball 200 from escaping from the annular limit groove 11, thereby axially limiting the knob 21 through the ball 200, thereby preventing the knob 21 from escaping from the shell 1.

[0043] It should be noted that the installation methods of the positioning hole 210 and the sealing block 201 include but are not limited to interference fit and thread fit.

[0044] In this embodiment, if Figure 2 , Figure 6 and Figure 7 As shown, the upper part of the lifting block 22 is provided with a sleeve ear 220, and the knob 21 is provided with a through hole 211 for plugging the lifting block 22. The diameter of the sleeve ear 220 is larger than the diameter of the through hole 211. The sleeve ear 220 can limit the initial position of the lifting block 22. When the sleeve ear 220 and the knob 21 are in contact, it is the initial point position of the lifting block 22. The lifting block 22 is also provided with a socket 221 for plugging the push pin 32. The push pin 32 passes through the socket 221 and is plugged into the needle tube 31.

[0045] It should be noted that traditional brain injection mainly relies on doctors' experience to judge the insertion depth of the needle tube 31 in the brain, and it is impossible to accurately know the movement distance of the needle tube 31. If there is a deviation between the doctor's intuition and the facts, the drug may not form a complete drug column in the brain.

[0046] Therefore, in some embodiments of the present application, Figure 1 , Figure 6 and Figure 7 As shown, the knob 21, the lifting block 22 and the guide arm 4 are provided with scales that can be converted to each other. In actual application, the doctor can control the depth of the needle tube 31 inserted into the brain through the scale on the guide arm 4; during the injection process, the position of the needle tube 31 can be fine-tuned through the knob 21 and the lifting block 22, so that the moving distance of the needle tube 31 becomes more intuitive and accurate, ensuring that the drug can form a drug column in the patient's brain.

[0047] In this embodiment, if Figure 1 and Figure 8 As shown, a base 5 is installed at the lower portion of the shell 1, and a protective tube 51 coaxial with the needle tube 31 is provided on the base 5. The inner diameter of the protective tube 51 is larger than the outer diameter of the needle tube 31. Partially inserting the needle tube 31 into the protective tube 51 can prevent the needle tube 31 from directly colliding with the lower portion of the shell 1 and bending when the needle tube 31 is subjected to external force.

[0048] It is understandable that in order for the protective tube 51 to more effectively prevent the needle tube 31 from bending, the length of the protective tube 51 should not be too short, and should be at least more than 10% of the length of the needle tube 31; in addition, the length of the protective tube 51 should not be too long, otherwise the needle tube 31 will be pushed into the patient's brain and cause damage; therefore, the preferred length of the protective tube 51 in the present application is 10%~20% of the needle tube 31.

[0049] In this embodiment, if Figure 8 and Fig. 9 As shown, the guide arm 4 is "L"-shaped, and a mounting opening 41 for mounting the shell 1 is installed on the short side of the guide arm 4; a limit plate 12 is arranged on the upper part of the shell 1, and the outer diameter of the limit plate 12 is larger than the inner diameter of the mounting opening 41 to ensure that when the shell 1 is installed with the mounting opening 41, the lower end surface of the limit plate 12 can be abutted against the upper end surface of the mounting opening 41, so that the shell 1 will not slip out of the mounting opening 41.

[0050] It should be supplemented that an adjustment hole 44 is provided on the mounting opening 41 , and the size of the mounting opening 41 can be adjusted by inserting a bolt into the adjustment hole 44 , so that the connection between the mounting opening 41 and the housing 1 is more stable.

[0051] Further, such as Figure 8 and Fig. 9As shown, the side wall of the shell 1 is provided with a positioning block 13, and the inner wall of the mounting opening 41 is provided with a positioning groove 43 that cooperates with the positioning block 13. When the shell 1 and the guide arm 4 are installed, the positioning block 13 is embedded in the positioning groove 43 to obtain the correct installation point; in addition, the shell 1 can also be radially limited by the positioning block 13 and the positioning groove 43 to prevent the shell 1 from rotating in the mounting opening 41.

[0052] In this embodiment, if Fig. 9 As shown, a guide groove 42 is provided on the guide arm 4 to limit the moving direction of the guide arm 4 ; by installing a slider in the guide groove 42 , the guide arm 4 can be moved along the long side direction of the guide groove 42 .

[0053] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A guiding device for cranial injection, comprising a housing (1), characterized in that: A driving assembly (2) is mounted on the shell (1), and the driving assembly (2) comprises a knob (21) and a lifting block (22). The knob (21) is rotatably mounted on the upper portion of the shell (1), and the knob (21) and the lifting block (22) are connected by threaded engagement. A slide rail (100) is disposed on the side of the lifting block (22), and a protrusion (101) engaging with the slide rail (100) is disposed on the inner wall of the shell (1). The knob (21) is used to control the lifting block. (22) slides in the shell (1); an injection assembly (3) is installed on the lifting block (22), and the injection assembly (3) comprises a needle tube (31) and a push pin (32) for blocking the needle tube (31); the needle tube (31) is fixedly installed at the lower part of the lifting block (22), and the push pin (32) is plugged into the needle tube (31); the needle tube (31) at least partially extends out of the shell (1); and a guide arm (4) for supporting the shell (1) is installed on the shell (1).

2. The guide device for cranial injection according to claim 1, characterized in that: The push pin (32) is provided with a needle handle (321), a limit block (322) and a needle core (323) in order from top to bottom; a connecting block (310) is provided at the top of the needle tube (31), and a through hole is provided inside the connecting block (310); the needle core (323) passes through the through hole and is plugged into the needle tube (31); the size of the limit block (322) is larger than the size of the through hole, and the limit block (322) is used to limit the plugging depth of the needle core (323); the length of the needle handle (321) is larger than the sum of the lengths of the lifting block (22) and the housing (1).

3. The guide device for cranial injection according to claim 2, characterized in that: The bottom of the needle tube (31) is provided with a chamfered surface (311), the bottom of the needle core (323) is provided with a curved surface (324), and the bottom of the needle core (323) is close to the bottom of the needle tube (31); the needle core (323) is solid, and the size of the needle core (323) is adapted to the size of the inner cavity of the needle tube (31), so that the needle core (323) blocks the needle tube (31).

4. The guide device for cranial injection according to claim 1, characterized in that: The side wall of the housing (1) is provided with an annular limiting groove (11); the side of the knob (21) is provided with a positioning hole (210) aligned with the annular limiting groove (11); a ball (200) is installed in the annular limiting groove (11); the diameter of the ball (200) is greater than the depth of the annular limiting groove (11); a sealing block (201) is installed inside the positioning hole (210); the sealing block (201) is used to seal the ball (200).

5. The guide device for cranial injection according to claim 1, characterized in that: The upper part of the lifting block (22) is provided with a sleeve ear (220); the knob (21) is provided with a through hole (211); the lifting block (22) is plugged into the through hole (211); the size of the sleeve ear (220) is larger than the size of the through hole (211); the lifting block (22) is provided with a plug hole (221); the push pin (32) is plugged into the plug hole (221).

6. The guide device for cranial injection according to claim 1, characterized in that: The knob (21), the lifting block (22) and the guide arm (4) are provided with scales that can be converted to each other.

7. The guide device for cranial injection according to claim 1, characterized in that: A base (5) is installed at the lower part of the housing (1), and a protective tube (51) coaxial with the needle tube (31) is arranged on the base (5), and the inner diameter of the protective tube (51) is larger than the outer diameter of the needle tube (31), so that the needle tube (31) can be plugged into the protective tube (51).

8. The guide device for cranial injection according to claim 7, characterized in that: The length of the protection tube (51) is 10% to 20% of the length of the needle tube (31).

9. The guide device for cranial injection according to claim 1, characterized in that: The lower part of the guide arm (4) is provided with a mounting opening (41), the upper part of the housing (1) is provided with a limiting plate (12), the housing (1) is mounted on the mounting opening (41), and the lower end of the limiting plate (12) abuts against the upper end wall of the mounting opening (41).

10. The guide device for cranial injection according to claim 1, characterized in that: The guide arm (4) is provided with a guide groove (42), and the guide arm (4) moves along the long side direction of the guide groove (42).

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