Anti-injury skull fixing nail

Abstract

The skull fixing nail comprises an electric drill connector, one end of the electric drill connector is fixedly connected with an extending connecting column, a first groove is formed in the side surface of one end of the extending connecting column, a first skull nail body is arranged on the inner wall of the first groove, and a second groove is formed in the side surface of the first skull nail body; a telescopic column is installed on the inner wall of the second groove, and one end of the telescopic column is fixedly connected with a second cranial nail. The anti-injury skull fixing nail is provided with an extrusion block and a limiting clamping block, when the anti-injury skull fixing nail works, a first skull nail is conveniently mounted through a first groove, the extrusion block pushes the limiting clamping block to slide so as to be clamped with a positioning groove, so that the first skull nail is fixed and is convenient to work, and when the anti-injury skull fixing nail needs to be disassembled, an unlocking sliding plate is pushed to unlock the first skull nail. And an unlocking sliding plate drives an extrusion block to slide to loosen a limiting clamping block, so that the limiting clamping block is conveniently pulled by a spring to unlock a positioning groove, the convenience of replacing the cranial nail during working of the device is improved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of skull surgery instruments, in particular to a damage-resistant skull fixation pin. Background Art

[0002] Skull fixation cranial pins are a type of medical device used to fix the skull during neurosurgery. Skull fixation cranial pins are usually made of medical metal materials, such as titanium alloy. Titanium alloy has good biocompatibility, which means that the human body has little rejection reaction to it. Its shape is generally a long and thin nail, and the head may have a special design, such as a nut or other structure that is easy to fix. The length and thickness of the nail will vary according to the specific needs of the operation. For example, the size of the cranial pins for adults and children will be different. In skull surgery, when the skull needs to be fixed, such as skull fracture repair or re-fixation after craniotomy For the skull flap, the doctor will drill the skull pins into the skull and use the friction between the skull pins and the skull and the fixing device to keep the skull in a stable position. This fixation method can effectively prevent the skull from shifting and create good conditions for the healing of the skull. Since the skull pins are medical devices implanted in the human body, biocompatibility is of vital importance. Titanium alloy skull pins have good biocompatibility, the human body has little rejection reaction to them, and they are relatively safe to exist in the body for a long time. If the patient is allergic to metals or needs to keep the skull pins in for a long time, titanium alloy is a better choice. The surface of the skull pins should be smooth, without sharp edges or burrs to prevent damage to surrounding tissues.

[0003] When implanting the skull pins, very precise operations are required, because there are important brain tissues, blood vessels and nerves around the skull. If the operation is improper, the skull pins may damage these structures and cause serious complications, such as intracranial hemorrhage, brain damage, etc. Since it is a medical device implanted in the human body, strict aseptic operation must be guaranteed. During the operation, the skull pins need to be strictly disinfected to prevent postoperative infection. In the prior art, when performing sleep recorder installation surgery on small animals, in order to stably fix the sleep monitoring electrodes on the mouse skull, it is necessary to first fix four skull pins on the surface of the skull, and then wrap the sleep electrode silver wire around the skull pins for fixation.

[0004] When the skull pin is in use, it needs to be drilled into the skull with an electric drill. Generally, an external thread is designed at the tail of the skull pin, and a matching internal thread is designed at the head of the output shaft of the electric drill. In this way, the skull pin can be firmly connected to the electric drill by rotating the skull pin or the output shaft of the electric drill. The advantage of this connection method is that it is tightly connected and can withstand a large torque, ensuring that the skull pin will not loosen during the process of drilling into the skull. However, when implanting multiple skull pins, it is troublesome to disassemble and assemble the skull pins and the electric drill, which is not convenient for rapid replacement of the skull pins during surgery. In addition, the length of the skull pins used for fixation is generally much longer than the thickness of the mouse skull. Therefore, it is not easy to grasp the fixing depth of the skull pin during fixation, which often leads to the skull pin being fixed too shallowly and unstable, or the skull pin being fixed too deeply and compressing the brain tissue below the skull pin, greatly reducing the work efficiency. Summary of the invention

[0005] The object of the present invention is to provide a damage-resistant skull fixation cranial pin to solve the problems raised in the above-mentioned background technology that when implanting multiple cranial pins, it is troublesome to disassemble and assemble the cranial pins and the electric drill, which makes it inconvenient to quickly replace the cranial pins during surgery, and when inserting the cranial pins, additional auxiliary tools are needed to control the depth of the cranial pins entering the skull, which reduces the work efficiency.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an anti-damage skull fixation nail, comprising an electric drill connector, one end of which is fixedly connected to an extension connecting column, a side surface of one end of the extension connecting column is provided with a first groove, the inner wall of the first groove is provided with a first skull nail, the side surface of the first skull nail is provided with a second groove, and the inner wall of the second groove is installed with a telescopic column, one end of the telescopic column is fixedly connected to the second skull nail, a first cavity is provided on the surface of the extension connecting column, an unlocking slide is slidably connected to the inner wall of the first cavity, and two extrusion blocks are fixed to one end of the unlocking slide, the inner wall of the first groove is provided with two openings, and a limiting block is slidably connected to the opening of the first groove, the outer surface of the first skull nail is provided with two positioning grooves, and a detection and telescopic mechanism is provided inside the second skull nail, which controls the micro air valve through a micro optical fiber probe and a photoelectric detector to drive the piston column and the limit column to move, thereby contracting the telescopic column for adjustment.

[0007] Preferably, the second groove is slidably connected to the telescopic column, and a spring is connected between the inner wall of the second groove and the side surface of the telescopic column.

[0008] By adopting the above technical solution, when using the device, the telescopic column is first used to facilitate the second skull pin to move relative to the first skull pin, so as to facilitate changing the distance between the second skull pin and the first skull pin.

[0009] Preferably, one end of the unlocking slide passes through the surface of the extended connecting column, and an anti-slide plate is provided on the upper surface of one end of the unlocking slide, and a spring is connected between the unlocking slide and the first cavity.

[0010] By adopting the above technical solution, when using the device, the anti-slip plate of the unlocking slide is firstly unlocked, so that the unlocking slide drives the two squeezing blocks at one end to move.

[0011] Preferably, the two extrusion blocks are symmetrically arranged, and the surface of the extrusion block facing the limit block is inclined, one end of the limit block is arc-shaped, a spring is connected between the limit block and the first groove, and the limit block and the extrusion block are arranged vertically, and the limit block and the positioning groove form a snap-fit ​​connection.

[0012] By adopting the above technical solution, when using the device, the arc-shaped design of the limit block is first pushed by the inclined surface of the extrusion block, so that the mutually perpendicular extrusion blocks drive the limit block to move, so that the limit block engages with the positioning groove.

[0013] Preferably, the detection telescopic mechanism includes a miniature fiber optic probe, which is embedded in the surface of one end of the second skull pin, and a photoelectric detector is fixedly connected to the inside of the second skull pin, a storage air bag is provided on the side of the photoelectric detector, and a miniature air valve is fixedly connected to one end of the storage air bag, an air guide groove is provided inside the second skull pin, a sliding groove is provided on the outer surface of the telescopic column, a piston column is slidably connected to the inner wall of the sliding groove, and a limiting column is fixed to one end of the piston column, and an anti-slip groove is provided on the inner wall of the first skull pin.

[0014] By adopting the above technical solution, when using the device, firstly, a light signal is emitted and received by a micro-optical fiber probe, and the light signal is detected by a photoelectric detector, so that the micro-valve is controlled by the change of the light signal.

[0015] Preferably, the micro optical fiber probe is connected to the photoelectric detector via a wire, the storage airbag is communicated with the micro air valve, and the photoelectric detector is connected to the micro air valve via a wire.

[0016] By adopting the above technical solution, when using the present device, firstly, the micro-fiber probe and the photoelectric detector are connected by a wire, so that the photoelectric detector can detect the light signal received by the micro-fiber probe, and then the micro-valve is connected to the storage airbag by a wire.

[0017] Preferably, one end of the air guide groove passes through the side surface of the telescopic column, and the air guide groove is connected to the sliding groove.

[0018] By adopting the above technical solution, when using the device, firstly, the telescopic column is passed through one end of the gas guide groove, so that the gas guide groove is connected with the sliding groove, which is convenient for gas flow.

[0019] Preferably, a spring is connected between the sliding groove and the limiting column, and the limiting column and the anti-slip groove form a snap-fit ​​connection.

[0020] By adopting the above technical solution, when using the present device, the storage air bag is first connected through a micro air valve, so that air is introduced into the storage air bag from the sliding groove and the air guide groove, so that the inner wall spring of the sliding groove pulls the piston column and the limit column to move, and the anti-slip slot is released to facilitate the sliding of the telescopic column and the second skull pin relative to the first skull pin.

[0021] Compared with the prior art, the beneficial effects of the present invention are: the damage-resistant skull fixation pin:

[0022] 1. An extrusion block and a limiting card block are provided, so that when the device is working, the first skull pin can be installed through the first groove, and the limiting card block can be pushed by the extrusion block to slide and engage the positioning groove, so as to fix the first skull pin for easy work. When disassembly is required, the unlocking slide is pushed to make the unlocking slide drive the extrusion block to slide and release the limiting card block, so that the limiting card block is pulled by the spring to unlock the positioning groove, thereby increasing the convenience of replacing the skull pin when the device is working and improving the work efficiency;

[0023] 2. A micro-fiber probe and a photoelectric detector are provided. When fixing the skull nails on mice, it is easy to damage the brain tissue because it is difficult to control the depth. When the device is working, the micro-fiber probe emits and receives light of a specific wavelength. When the skull nail drills into the skull, the micro-valve will not be activated because the skull has relatively stable reflection and absorption characteristics of light. When approaching the brain tissue, the brain tissue absorbs certain wavelengths of light more strongly and reflects less, which will change the light signal received by the fiber optic probe. The light signal is detected by the photoelectric detector, which is convenient for rapid detection and identification when approaching the brain tissue.

[0024] 3. A piston column and a limit column are provided, so that when the device is working, after the light signal is detected by the photoelectric detector, the photoelectric detector controls the micro air valve to open, so that the air in the air guide groove and the sliding groove is introduced into the storage air bag, so that the spring on the inner wall of the sliding groove pulls the piston column and the limit column to slide and retract, and the limit column releases the anti-slip groove, so that the spring on the inner wall of the second groove pulls the telescopic column and the second skull nail to slide and retract, thereby preventing damage to the brain tissue. The user will be reminded while retracting, thereby achieving the purpose of ensuring precise surgery and improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the three-dimensional structure of the electric drill connector and the extended connecting column of the present invention;

[0026] Figure 2 This is a schematic diagram of a three-dimensional structure of the extended connecting column and the unlocking slide plate of the present invention;

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection between the first cavity and the unlocking slide plate of the present invention;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the connection between the telescopic column and the second cranial pin of the present invention;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the connection between the first groove and the limiting block of the present invention;

[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of the unlocking slide plate and the extrusion block connected to the present invention;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the connection between the first cranial pin and the positioning groove of the present invention;

[0032] Figure 8 This is a schematic diagram of the three-dimensional structure of the connection between the micro optical fiber probe and the photoelectric detector of the present invention;

[0033] Fig. 9 It is a schematic diagram of the three-dimensional structure of the connection between the first cranial pin and the second groove of the present invention;

[0034] Fig.10 It is a schematic diagram of the three-dimensional structure of the connection between the piston column and the limiting column of the present invention.

[0035] In the figure: 1. electric drill connector; 2. extended connecting column; 3. first groove; 4. first skull pin; 5. second groove; 6. telescopic column; 7. second skull pin; 8. first cavity; 9. unlocking slide; 10. extrusion block; 11. limit card block; 12. positioning groove; 13. micro fiber optic probe; 14. photoelectric detector; 15. storage air bag; 16. micro air valve; 17. air guide groove; 18. sliding groove; 19. piston column; 20. limit column; 21. anti-slip groove. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-10The present invention provides a technical solution: an anti-damage skull fixation cranial pin, comprising an electric drill connector 1, an extended connecting column 2, a first groove 3, a first cranial pin 4, a second groove 5, a telescopic column 6, a second cranial pin 7, a first cavity 8, an unlocking slide 9, an extrusion block 10, a limit card block 11, a positioning groove 12, a micro-fiber probe 13, a photoelectric detector 14, a storage air bag 15, a micro-air valve 16, an air guide groove 17, a sliding groove 18, a piston column 19, a limit column 20 and an anti-slip card groove 21, the electric drill connector 1, one end of which is fixedly connected to the extended connecting column 2, the side surface of one end of the extended connecting column 2 is provided with a first groove 3, the inner wall of the first groove 3 is provided with the first cranial pin 4, and the second groove 5 is connected to the inner wall of the second groove 5. The telescopic column 6 forms a sliding connection, and a spring is connected between the inner wall of the second groove 5 and the side surface of the telescopic column 6. One end of the unlocking slide plate 9 passes through the surface of the extended connecting column 2, and an anti-slip plate is provided on the upper surface of one end of the unlocking slide plate 9. A spring is connected between the unlocking slide plate 9 and the first cavity 8. When using the present device, first fix the electric drill connector 1 to the output end of the electric drill, insert one end of the first skull nail 4 into the first groove 3 at one end of the extended connecting column 2, and push the unlocking slide plate 9 through the spring on the inner wall of the first cavity 8, so that the unlocking slide plate 9 pushes the limiting block 11 through the two extrusion blocks 10 at one end, so that the limiting block 11 is stuck in the positioning groove 12, which is convenient for connecting and fixing the extended connecting column 2 and the first skull nail 4.

[0038] A second groove 5 is provided on the side surface of the first skull pin 4, and a telescopic column 6 is installed on the inner wall of the second groove 5, one end of the telescopic column 6 is fixedly connected to the second skull pin 7, and the two extrusion blocks 10 are symmetrically arranged, and the surface of the extrusion block 10 facing the limit card block 11 is inclined, one end of the limit card block 11 is arc-shaped, a spring is connected between the limit card block 11 and the first groove 3, and the limit card block 11 and the extrusion block 10 are vertically arranged, and the limit card block 11 and the extrusion block 10 form a snap connection. When the first skull pin 4 needs to be removed, the unlocking slide plate 9 is pushed so that the unlocking slide plate 9 drives the extrusion block 10 to release the limit card block 11, and then the spring on the inner wall of the first groove 3 pulls the limit card block 11 to shrink, so that the first groove 3 unlocks the positioning groove 12, thereby facilitating the removal of the first skull pin 4, thereby improving the efficiency of setting multiple skull pins during work and increasing the convenience of use.

[0039] A first cavity 8 is provided on the surface of the extended connecting column 2, and an unlocking slide 9 is slidably connected to the inner wall of the first cavity 8, and two extrusion blocks 10 are fixed to one end of the unlocking slide 9. The detection telescopic mechanism includes a micro-optical fiber probe 13, which is embedded and installed on the surface of one end of the second skull nail 7, and a photoelectric detector 14 is fixedly connected inside the second skull nail 7. A storage air bag 15 is provided on the side of the photoelectric detector 14, and a micro air valve 16 is fixedly connected to one end of the storage air bag 15. An air guide groove 17 is provided inside the second skull nail 7, and a sliding groove 18 is provided on the outer surface of the telescopic column 6. The inner wall of the sliding groove 18 is slidably connected with a piston column 19, and a limiting column 20 is fixed at one end of the piston column 19. The inner wall of the first skull nail 4 is provided with an anti-slip groove 21. When the second skull nail 7 is drilled into the skull, the reflection and absorption characteristics of the skull to light are relatively stable, so that the photodetector 14 will not detect signal changes. When approaching the brain tissue, light of a specific wavelength is emitted through the micro-optical fiber probe 13, and the light reflected by the brain tissue causes the optical signal received by the optical fiber probe to change, so that after the micro-optical fiber probe 13 detects it, the signal is amplified and transmitted to the micro-valve 16 through the photodetector 14.

[0040] The inner wall of the first groove 3 is provided with two openings, and a limit block 11 is slidably connected in the opening of the first groove 3. Two positioning grooves 12 are provided on the outer surface of the first skull nail 4. A detection and telescopic mechanism is provided inside the second skull nail 7. The micro-air valve 16 is controlled by a micro-optical fiber probe 13 and a photoelectric detector 14 to drive the piston column 19 and the limit column 20 to move, thereby contracting the telescopic column 6 for adjustment. The micro-optical fiber probe 13 and the photoelectric detector 14 are connected by a wire, the storage air bag 15 is connected to the micro-air valve 16, and the photoelectric detector 14 is connected to the micro-air valve 16 by a wire. One end of the air guide groove 17 passes through the side surface of the telescopic column 6, and the air guide groove 17 is connected to the sliding groove 18. A spring is connected between the sliding groove 18 and the limit column 20. The limit column 20 is engaged with the anti-slip groove 21, and the photoelectric detector 14 controls the micro air valve 16 to open so that the air in the air guide groove 17 and the sliding groove 18 can be introduced into the storage air bag 15. At this time, the piston column 19 is no longer pushed by the air, so that the spring on the inner wall of the sliding groove 18 pulls the piston column 19 and the limit column 20 to slide and shrink, so that the limit column 20 releases the anti-slip groove 21 to unlock the second groove 5 and the telescopic column 6. At this time, the spring on the inner wall of the second groove 5 pulls the telescopic column 6 and the second skull nail 7 to slide and shrink, so that the second skull nail 7 will not contact and damage the brain tissue, and the contracted telescopic column 6 and the second skull nail 7 will remind the user, which is convenient for more accurate control of the drilling depth of the skull nail, effectively reducing the risk of surgery and improving the practicality of the device.

[0041] Working principle: When using the anti-damage skull fixation pin, first drive the extrusion block 10 to push the limit block 11 through the unlocking slide 9, so that the limit block 11 engages with the positioning groove 12 to fix the extended connecting column 2 and the first skull pin 4, and pushes the unlocking slide 9 to release the limit block 11 of the extrusion block 10 to unlock the first groove 3 and the first skull pin 4 for replacement, and drill into the skull through the second skull pin 7, and transmit and receive light signals through the micro-optical fiber probe 13. After the photoelectric detector 14 detects the change of the light signal, the photoelectric detector 14 controls the micro-air valve 16 to open, so that the air in the air guide groove 17 and the sliding groove 18 enters the storage air bag 15, so that the piston column 19 and the limit column 20 are pulled and contracted by the spring, so that the limit column 20 unlocks the anti-slip groove 21, thereby facilitating the sliding and contraction of the telescopic column 6 and the second skull pin 7, thereby preventing damage to the brain tissue and increasing the overall practicality.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-damage skull fixation pin, comprising an electric drill connector (1), one end of which is fixedly connected to an extension connecting column (2), one end of the extension connecting column (2) is provided with a first groove (3), the inner wall of the first groove (3) is provided with a first skull pin (4), the side surface of the first skull pin (4) is provided with a second groove (5), and the inner wall of the second groove (5) is installed with a telescopic column (6), one end of the telescopic column (6) is fixedly connected to a second skull pin (7), characterized in that: A first cavity (8) is provided on the surface of the extended connecting column (2), an unlocking slide plate (9) is slidably connected to the inner wall of the first cavity (8), and two extrusion blocks (10) are fixed to one end of the unlocking slide plate (9), the inner wall of the first groove (3) is provided with two openings, and a limiting block (11) is slidably connected in the opening of the first groove (3), the outer surface of the first skull pin (4) is provided with two positioning grooves (12), and a detection telescopic mechanism is provided inside the second skull pin (7), which controls the micro air valve (16) through a micro optical fiber probe (13) and a photoelectric detector (14) to drive the piston column (19) and the limiting column (20) to move, thereby contracting the telescopic column (6) for adjustment.

2. The anti-damage skull fixation pin according to claim 1, characterized in that: The second groove (5) and the telescopic column (6) form a sliding connection, and a spring is connected between the inner wall of the second groove (5) and the side surface of the telescopic column (6).

3. The anti-damage skull fixation pin according to claim 1, characterized in that: One end of the unlocking slide plate (9) passes through the surface of the extended connecting column (2), and an anti-slide plate is provided on the upper surface of one end of the unlocking slide plate (9), and a spring is connected between the unlocking slide plate (9) and the first cavity (8).

4. The anti-damage skull fixation pin according to claim 1, characterized in that: The two extrusion blocks (10) are symmetrically arranged, and the surface of the extrusion block (10) facing the limit block (11) is inclined, one end of the limit block (11) is arc-shaped, a spring is connected between the limit block (11) and the first groove (3), and the limit block (11) and the extrusion block (10) are vertically arranged, and the limit block (11) and the positioning groove (12) form a snap connection.

5. The anti-damage skull fixation pin according to claim 1, characterized in that: The detection telescopic mechanism comprises a micro-fiber probe (13), which is embedded in the surface of one end of the second skull pin (7), and a photoelectric detector (14) is fixedly connected inside the second skull pin (7), a storage air bag (15) is arranged on the side of the photoelectric detector (14), and one end of the storage air bag (15) is fixedly connected to a micro air valve (16), an air guide groove (17) is provided inside the second skull pin (7), a sliding groove (18) is provided on the outer surface of the telescopic column (6), a piston column (19) is slidably connected to the inner wall of the sliding groove (18), and a limiting column (20) is fixed to one end of the piston column (19), and an anti-slip groove (21) is provided on the inner wall of the first skull pin (4).

6. The anti-damage skull fixation pin according to claim 5, characterized in that: The micro optical fiber probe (13) and the photoelectric detector (14) are connected via a wire, the storage air bag (15) is connected to the micro air valve (16), and the photoelectric detector (14) and the micro air valve (16) are connected via a wire.

7. The anti-damage skull fixation pin according to claim 5, characterized in that: One end of the air guide groove (17) passes through the side surface of the telescopic column (6), and the air guide groove (17) is connected to the sliding groove (18).

8. The anti-damage skull fixation pin according to claim 5, characterized in that: A spring is connected between the sliding groove (18) and the limiting column (20), and the limiting column (20) and the anti-slip groove (21) form a snap-fit ​​connection.

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