Brain tissue retracting and expanding device in variable-depth craniocerebral operation based on releasing technology

Abstract

The invention provides a brain tissue retraction and expansion device in a variable-depth craniocerebral operation based on a release technology, which comprises a rotating plate, a fixed base plate, a mounting nut, an expansion plate and a fixed branched chain, the expansion plate is mounted on the mounting nut, the expansion plate forms a circular channel, an external thread of the mounting nut is matched with an internal thread of the fixed base plate, and the fixed branched chain is fixed on the rotating plate. The rotating plate is installed on the groove of the fixed base plate through a buckle, and a protruding edge is arranged in the rotating plate and matched with the groove of the fixed base plate; by rotating the rotating plates with different angles or radians, the elastic expansion movement of the expansion plates with different depths inserted into the brain is dragged and driven, so that the brain tissue in the brain is retracted, the healthy brain tissue is effectively prevented from being injured by an operation during a craniocerebral operation, the intentional tissue in the brain is effectively controlled, and the brain tissue in the brain is effectively prevented from being damaged by the operation. Therefore, the precise craniocerebral operation is realized, the efficiency of the craniocerebral operation is greatly improved, the operation injury to a patient is effectively reduced, and meanwhile, the workload of medical workers during the operation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a device for retracting and expanding brain tissue in variable-depth cranial and brain surgery based on release technology. Background Art

[0002] The skull is a rigid and non-expandable closed structure. Intracranial hypertension can be caused by factors such as brain tissue swelling, intracranial space-occupying lesions, excessive cerebrospinal fluid secretion, malabsorption, circulatory obstruction, or excessive cerebral blood flow perfusion. Intracranial hypertension that exceeds the limited compensatory space of brain tissue is a harmful and potentially fatal state that may cause further ischemia and necrosis of brain tissue, thereby triggering a series of chain reactions.

[0003] Treatment of intracranial hypertension involves the use of certain medications, sedatives, and ventilation techniques, as well as the removal of cerebrospinal fluid or space-occupying lesions (e.g., tumors, hematomas). However, in many cases, these measures are not sufficient to restore intracranial pressure to acceptable levels, and a decompressive craniotomy is necessary. This technique involves removing a large portion of the skull cap and opening the dura, thereby allowing the swollen brain to herniate outward through a surgical skull incision. In many cases, decompressive craniectomy improves clinical outcomes through different mechanisms: it reduces intracranial pressure, improves cerebral perfusion, and reduces the risk of brain herniation, thereby reducing compression on important structures such as the brainstem. After the patient survives the acute intracranial hypertension stage, cranial repair surgery is performed, which involves repositioning previously removed bone pieces or placing a cranial prosthesis made of synthetic material.

[0004] During the weeks or months between decompressive craniectomy and subsequent cranioplasty, the brain tissue is at risk for trauma, so the patient needs to use protective gear, such as a helmet. In addition, the loss of bone fragments can lead to other complications such as "drilling syndrome" caused by the direct transmission of atmospheric pressure to the brain tissue and the formation of adhesions between the subcutaneous soft tissue and the dura mater and brain, which may lead to bleeding, prolonged operation time, and surgical risks during the repair phase.

[0005] Generally, during cranial surgery, the brain tissue in the cranium needs to be retracted or expanded to avoid damaging the healthy brain tissue in the cranium, or to repair the diseased tissue by retracting the healthy tissue. At this time, the brain tissue needs to be retracted by an expander. Therefore, there is an urgent need to design a tool for retracting and expanding the brain tissue during cranial surgery. Summary of the invention

[0006] The present invention aims to overcome the deficiencies in the above-mentioned prior art, and its main purpose is to provide a device for retracting and expanding brain tissue during variable depth cranial and brain surgery based on release technology. By rotating a rotating plate at different angles or arcs, the expansion plate inserted into the cranial and brain at different depths can be pulled and driven to elastically expand, thereby retracting the brain tissue in the cranial and brain, effectively avoiding surgical damage to healthy brain tissue during cranial and brain surgery, effectively realizing the control of intended tissue in the cranial and brain, and further realizing precise cranial and brain surgery, which greatly improves the efficiency of cranial and brain surgery. By adopting bionic non-toxic materials, the surgical damage to patients is effectively reduced, and at the same time the workload of medical workers during surgery is reduced, ensuring that the focus of medical workers' work is on cranial and brain surgery.

[0007] To achieve the purpose of the present invention, the technical solution adopted is: A device for retracting and expanding brain tissue during variable depth cranial surgery based on release technology, comprising a rotating plate, a fixed base plate, a mounting nut, an expansion plate, and a fixed branch chain. The expansion plate is mounted on the mounting nut, the expansion plate forms a circular channel, and the external thread of the mounting nut is matched with the internal thread of the fixed base plate for installation; the rotating plate is mounted on the groove of the fixed base plate by a snap-fit, the rotating plate has a convex ridge inside, which cooperates with the groove of the fixed base plate, and the four arcs on the inner side of the rotating plate are in contact with the expansion plate respectively, and the four arcs are in contact with the expansion plate with different forces by rotating the rotating plate at different angles, thereby realizing the expansion size of the bottom of the expansion plate.

[0008] As a preferred solution, the expansion plate includes an elastic expansion sheet, the upper end of the elastic expansion sheet is installed and connected with an expansion sheet arc clamp with a gradually increasing radius, and the lower end of the expansion sheet arc clamp is installed and connected with an expansion sheet fixing clamp on the elastic expansion sheet; the elastic expansion sheet includes an elastic expansion sheet shell, the outer surface of the elastic expansion sheet shell is wrapped with an expansion sheet bionic protective film, the interior of the elastic expansion sheet shell is wrapped with a non-Newtonian fluid elastic colloid, and a plurality of elastic carbon fibers are embedded in the non-Newtonian fluid elastic colloid The reinforcing ribs, the elastic carbon fiber reinforcing ribs include an internal elastic carbon fiber body, the outer surface of the elastic carbon fiber body is wrapped with an elastic bionic protective film; the expansion sheet bionic protective film and the elastic bionic protective film both include the following components in parts by weight: 10-20 parts of polysialic acid, 5-13 parts of chitosan, 3-11 parts of polydopamine, 50-80 parts of polysebacylglycerol diester, 3-10 parts of ureidopyrimidone, 10-30 parts of methyl lactate, 5-20 parts of silicon dioxide, and 3-8 parts of bionic non-toxic additives.

[0009] As a preferred solution, the rotating plate includes a rotating plate handle, which is installed and connected to the rotating plate buckle. The rotating plate buckle is divided into a rotating plate lower buckle and a rotating plate upper buckle. The rotating plate lower buckle and the rotating plate buckle are installed and connected through a bayonet connector.

[0010] As a preferred solution, a handle through hole is provided on the rotating plate handle, and two continuous arcs are provided on the inner wall surfaces of the buckle under the rotating plate and the buckle on the rotating plate, and a buckle groove is formed at the connection of the arcs.

[0011] As a preferred solution, the fixed base plate includes a fixed base plate handle, which is mounted and connected to the rotating plate clamping ring, and a nut mounting clamping ring is mounted and connected to the lower part of the rotating plate clamping ring.

[0012] As a preferred solution, the nut mounting clamp of the fixed base plate is engaged with the external thread of the mounting nut through an internal thread, and a branch chain mounting groove for installing a fixed branch chain is provided on the outer peripheral side of the nut mounting clamp, and a fixed base plate through hole is provided on the rotating plate clamp and the nut mounting clamp.

[0013] As a preferred solution, the mounting nut includes a mounting nut body, the inner surface of the mounting nut body is provided with an expansion plate mounting clamp and an expansion plate mounting groove connected to the expansion plate, and the outer surface of the mounting nut body is provided with threads.

[0014] As a preferred solution, the fixed branch chain includes a fixed branch chain mounting seat installed and connected to the fixed base plate, a first branch chain arm with rotating joints at both ends is installed and connected to the fixed branch chain mounting seat, a second branch chain arm with rotating joints at both ends is installed and connected to the first branch chain arm, and a branch chain fixed mounting screw group is installed and connected to the end of the second branch chain arm.

[0015] As a preferred solution, a handle through-hole top screw is installed in the handle through-hole of the rotating plate handle.

[0016] As a preferred solution, the bionic non-toxic additives include one or more of a defoamer, an antistatic agent, a stabilizer, a leveling agent, a film-forming agent, a lubricant, an antioxidant, and a mildew-proof agent.

[0017] The present invention provides a device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology, which has the following advantages: The present invention achieves the retraction of brain tissue in the skull by rotating the rotating plate at different angles or arcs to pull and drive the elastic expansion movement of the expansion plate inserted at different depths in the skull, effectively avoiding surgical damage to healthy brain tissue during skull surgery, effectively achieving control of intended tissue in the skull, and then achieving precise skull surgery, which greatly improves the efficiency of skull surgery. The use of bionic non-toxic materials effectively reduces surgical damage to patients, while reducing the workload of medical workers during surgery, ensuring that the focus of medical workers' work is on skull surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the overall three-dimensional structure of the brain tissue retraction and expansion device in variable depth cranial brain surgery based on the release technology of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall front view structure of the brain tissue retraction and expansion device in variable depth cranial brain surgery based on the release technology of the present invention.

[0020] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the device for retracting and expanding brain tissue in variable depth cranial brain surgery based on the release technology of the present invention. Figure 1 .

[0021] Figure 4 This is a schematic diagram of the overall cross-sectional structure of the device for retracting and expanding brain tissue in variable depth cranial brain surgery based on the release technology of the present invention. Figure 2 .

[0022] Figure 5 This is a schematic diagram of the overall assembly structure of the brain tissue retraction and expansion device in variable depth cranial brain surgery based on the release technology of the present invention Figure 1 .

[0023] Figure 6 This is a schematic diagram of the overall assembly structure of the brain tissue retraction and expansion device in variable depth cranial brain surgery based on the release technology of the present invention. Figure 2 .

[0024] Figure 7 The present invention is a schematic diagram of the top view of the structure of a rotating plate of a brain tissue retraction and expansion device in variable depth cranial and brain surgery based on the release technology.

[0025] Figure 8 The present invention is a schematic diagram of the side view structure of a rotating plate of a brain tissue retraction and expansion device in variable depth cranial brain surgery based on the release technology.

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of a fixed base plate of a device for retracting and expanding brain tissue in variable depth cranial and brain surgery based on the release technology of the present invention.

[0027] Fig.10 It is a side view structural schematic diagram of a fixed base plate of a device for retracting and expanding brain tissue in variable depth cranial and brain surgery based on the release technology of the present invention.

[0028] Fig.11 It is a schematic diagram of the top view of the fixed base plate of the brain tissue retraction and expansion device in variable depth cranial and brain surgery based on the release technology of the present invention.

[0029] Fig.12 It is a schematic diagram of the three-dimensional structure of the mounting nut of the brain tissue retraction and expansion device in the variable depth cranial brain surgery based on the release technology of the present invention.

[0030] Fig.13 The invention is a schematic diagram of the cross-sectional structure of the mounting nut of the brain tissue retraction and expansion device in variable depth cranial brain surgery based on the release technology.

[0031] Fig.14 It is a schematic diagram of the three-dimensional structure of the expansion plate of the brain tissue retraction and expansion device in the variable depth cranial brain surgery based on the release technology of the present invention.

[0032] Fig.15 The present invention is a schematic diagram of the front view structure of an expansion plate of a brain tissue retraction and expansion device in variable depth cranial brain surgery based on the release technology.

[0033] Fig.16 It is a schematic diagram of the three-dimensional structure of the fixed branch chain of the brain tissue retraction and expansion device in the variable depth cranial brain surgery based on the release technology of the present invention.

[0034] Fig.17 It is a schematic diagram of the internal structure of an elastic expansion piece of a brain tissue retraction and expansion device in a variable depth cranial brain surgery based on the release technology of the present invention.

[0035] Fig.18 It is a schematic diagram of the internal structure of the elastic carbon fiber reinforcement ribs of the brain tissue retraction and expansion device in variable depth cranial brain surgery based on the release technology of the present invention.

[0036] In the figure: 1, rotating plate; 2, fixed base plate; 3, mounting nut; 4, expansion plate; 5, fixed branch chain; 11, rotating plate handle; 12, rotating plate lower buckle; 13, rotating plate buckle; 14, bayonet connector; 15, handle through hole; 16, buckle groove; 21, fixed base plate handle; 22, rotating plate clamp ring; 23, nut mounting clamp ring; 24, branch chain mounting slot; 25, fixed base plate through hole; 31, mounting nut body; 32, expansion plate mounting clamp head; 33, Expansion plate mounting slot; 41, elastic expansion plate; 42, expansion plate arc clamp; 43, expansion plate fixing clamp; 411, expansion plate bionic protective film; 412, elastic expansion plate shell; 413, non-Newtonian fluid elastic colloid; 414, elastic carbon fiber reinforcement rib; 414-1, elastic carbon fiber body; 414-2, elastic bionic protective film; 51, fixed branch chain mounting seat; 52, branch chain first chain arm; 53, branch chain second chain arm; 54, branch chain fixed mounting screw group. DETAILED DESCRIPTION

[0037] The present invention will be further described and illustrated below in conjunction with specific embodiments and the accompanying drawings.

[0038] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Embodiment 1:

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a device for retracting and expanding brain tissue during variable depth cranial surgery based on release technology includes a rotating plate 1, a fixed base plate 2, a mounting nut 3, an expansion plate 4, and a fixed branch chain 5. The expansion plate 4 is installed on the mounting nut 3, and the expansion plate 4 forms a circular channel. The external thread of the mounting nut 3 is matched with the internal thread of the fixed base plate 2 for installation; the rotating plate 1 is installed on the groove of the fixed base plate 2 by snap-fitting, and there are convex edges inside the rotating plate 1, which cooperate with the groove of the fixed base plate 2. The four arcs on the inner side of the rotating plate 1 are in contact with the expansion plate 4 respectively, and the four arcs are in contact with the expansion plate 4 with different forces by rotating the rotating plate 1 at different angles, thereby realizing the expansion size of the bottom of the expansion plate 4.

[0041] like Figure 7 and Figure 8 As shown, a device for retracting and expanding brain tissue during variable depth cranial and brain surgery based on the release technology, the rotating plate 1 includes a rotating plate handle 11, the rotating plate handle 11 is installed and connected on the rotating plate buckle, the rotating plate buckle is divided into a rotating plate lower buckle 12 and a rotating plate upper buckle 13, the rotating plate lower buckle 12 and the rotating plate upper buckle 13 are installed and connected through a bayonet connector 14; a handle through hole 15 penetrating the rotating plate handle 11 is provided on the rotating plate handle 11, two continuous arcs are provided on the inner side wall surfaces of the rotating plate lower buckle 12 and the rotating plate upper buckle 13, a buckle groove 16 is formed at the connection of the arcs, and a handle through hole top screw is installed in the handle through hole 15 of the rotating plate handle 11.

[0042] like Fig. 9 and Fig.10As shown, a device for retracting and expanding brain tissue during variable depth cranial surgery based on release technology, the fixed base plate 2 includes a fixed base plate handle 21, the fixed base plate handle 21 is installed and connected to the rotating plate clamping ring 22, and the lower part of the rotating plate clamping ring 22 is installed and connected with a nut mounting clamping ring 23; the nut mounting clamping ring 23 of the fixed base plate 2 is engaged with the external thread of the mounting nut 3 through an internal thread, and the outer peripheral side of the nut mounting clamping ring 23 is provided with a branch chain mounting groove 24 for installing a fixed branch chain 5, and the rotating plate clamping ring 22 and the nut mounting clamping ring 23 are both provided with a fixed base plate through hole 25.

[0043] like Fig.11 and Fig.12 As shown, a device for retracting and expanding brain tissue during variable depth cranial surgery based on release technology is provided. The mounting nut 3 includes a mounting nut body 31. The inner surface of the mounting nut body 31 is provided with an expansion plate mounting clamp 32 and an expansion plate mounting groove 33 which are mounted and connected to the expansion plate 4. The outer surface of the mounting nut body 31 is provided with a thread.

[0044] like Fig.13 and Fig.14 As shown, a device for retracting and expanding brain tissue during variable depth cranial surgery based on release technology, the expansion plate 4 includes an elastic expansion piece 41, the upper end of the elastic expansion piece 41 is installed and connected with an expansion piece arc clamp 42 with a gradually increasing radius, and the lower end of the expansion piece arc clamp 42 on the elastic expansion piece 41 is installed and connected with an expansion piece fixing clamp 43.

[0045] like Fig.15 and Fig.16 As shown, a brain tissue retraction and expansion device for variable depth cranial surgery based on release technology, the fixed branch chain 5 includes a fixed branch chain mounting seat 51 installed and connected to the fixed base plate 2, the fixed branch chain mounting seat 51 is installed and connected with a first branch chain arm 52 with rotating joints at both ends, the first branch chain arm 52 is installed and connected with a second branch chain arm 53 with rotating joints at both ends, and the end of the second branch chain arm 53 is installed and connected with a branch chain fixed mounting screw group 54.

[0046] like Fig.17 and Fig.18As shown, a device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology, wherein an elastic expansion piece 41 comprises an elastic expansion piece shell 412, the outer surface of the elastic expansion piece shell 412 is wrapped with an expansion piece bionic protective film 411, the elastic expansion piece shell 412 is wrapped with a non-Newtonian fluid elastic colloid 413, the non-Newtonian fluid elastic colloid 413 is embedded with a plurality of elastic carbon fiber reinforcing ribs 414, and the elastic carbon fiber reinforcing ribs 414 are embedded with a plurality of elastic carbon fiber reinforcing ribs 414. It includes an internal elastic carbon fiber body 414-1, and the outer surface of the elastic carbon fiber body 414-1 is wrapped with an elastic bionic protective film 414-2; the expansion sheet bionic protective film 411 and the elastic bionic protective film 414-2 both include the following components in parts by weight: 20 parts of polysialic acid, 13 parts of chitosan, 11 parts of polydopamine, 80 parts of polysebacylglycerol, 10 parts of ureidopyrimidone, 30 parts of methyl lactate, 20 parts of silicon dioxide, and 8 parts of bionic non-toxic additives.

[0047] Among them, bionic non-toxic additives include defoamers, antistatic agents, stabilizers, leveling agents, film-forming agents, lubricants, antioxidants, and mildew inhibitors. Example 2

[0048] The difference between this embodiment and embodiment 1 is that: The expansion sheet bionic protective film 411 and the elastic bionic protective film 414-2 both include the following components in parts by weight: 10 parts of polysialic acid, 5 parts of chitosan, 3 parts of polydopamine, 50 parts of polysebacylglycerol, 3 parts of ureidopyrimidone, 10 parts of methyl lactate, 5 parts of silicon dioxide, and 3 parts of bionic non-toxic additives; wherein the bionic non-toxic additives include defoaming agents, antistatic agents, stabilizers, leveling agents, film-forming agents, lubricants, antioxidants, and mildew inhibitors. Example 3

[0049] The difference between this embodiment and embodiments 1 and 2 is that: The expansion sheet bionic protective film 411 and the elastic bionic protective film 414-2 both include the following components in parts by weight: 15 parts of polysialic acid, 9 parts of chitosan, 8 parts of polydopamine, 70 parts of polysebacylglycerol, 9 parts of ureidopyrimidone, 25 parts of methyl lactate, 12 parts of silicon dioxide, and 5 parts of bionic non-toxic additives; wherein the bionic non-toxic additives include defoaming agents, antistatic agents, stabilizers, leveling agents, film-forming agents, lubricants, antioxidants, and mildew inhibitors.

[0050] When in use, the brain tissue retraction and expansion device for variable depth craniocerebral surgery based on the release technology of the present invention can be used to fine-tune the positioning position and penetration depth of the expander. During surgery, the expansion plate 4 is initially closed and installed on the mounting nut 3. The fixed base plate 2 can be rotated to change the depth as needed, and the rotating plate 1 can be buckled and rotated to change the expansion size of the bottom of the expander, and installed on the patient's skull or scalp by using the fixed branch chain 5. The craniocerebral surgery expander of the present invention can replace the traditional manually held expander, avoid positional displacement caused by fatigue, and help reduce surgical craniocerebral surgery trauma.

[0051] In the present invention, the present invention rotates the rotating plate at different angles or arcs to pull and drive the elastic expansion movement of the expansion plate inserted into the skull at different depths, thereby retracting the brain tissue in the skull, effectively avoiding surgical damage to healthy brain tissue during skull surgery, effectively realizing the control of intended tissue in the skull, and then realizing precise skull surgery, which greatly improves the efficiency of skull surgery. By adopting bionic non-toxic materials, the surgical damage to patients is effectively reduced, and at the same time the workload of medical workers during surgery is reduced, ensuring that the focus of medical workers' work is on skull surgery.

[0052] The technical solutions disclosed in the embodiments of the present invention are introduced in detail above. The principles and implementation methods of the embodiments of the present invention are explained in this article using specific embodiments. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology, characterized in that: It comprises a rotating plate (1), a fixed base plate (2), a mounting nut (3), an expansion plate (4), and a fixed branch chain (5); the expansion plate (4) is mounted on the mounting nut (3); the expansion plate (4) forms a circular channel; the external thread of the mounting nut (3) is matched with the internal thread of the fixed base plate (2) for mounting; The rotating plate (1) is mounted on the groove of the fixed base plate (2) by means of a snap-fit, and a convex edge is provided inside the rotating plate (1) to cooperate with the groove of the fixed base plate (2). The four arc segments inside the rotating plate (1) are in contact with the expansion plate (4) respectively, and the four arc segments are in contact with the expansion plate (4) with different forces by rotating the rotating plate (1) at different angles, thereby achieving the expansion size of the bottom of the expansion plate (4); The expansion plate (4) comprises an elastic expansion piece (41), the upper end of the elastic expansion piece (41) being connected to an expansion piece circular arc clamp (42) with a gradually increasing radius, and the lower end of the expansion piece circular arc clamp (42) being connected to an expansion piece fixing clamp (43) on the elastic expansion piece (41); The elastic expansion piece (41) comprises an elastic expansion piece shell (412), the outer surface of the elastic expansion piece shell (412) is wrapped with an expansion piece bionic protective film (411), the elastic expansion piece shell (412) is wrapped with a non-Newtonian fluid elastic colloid (413), the non-Newtonian fluid elastic colloid (413) is embedded with a plurality of elastic carbon fiber reinforcing ribs (414), the elastic carbon fiber reinforcing ribs (414) include an internal elastic carbon fiber body (414-1), and the outer surface of the elastic carbon fiber body (414-1) is wrapped with an elastic bionic protective film (414-2); The expansion sheet bionic protective film (411) and the elastic bionic protective film (414-2) both comprise the following components in parts by weight: 10-20 parts of polysialic acid, 5-13 parts of chitosan, 3-11 parts of polydopamine, 50-80 parts of polysebacylglycerol, 3-10 parts of ureidopyrimidone, 10-30 parts of methyl lactate, 5-20 parts of silicon dioxide and 3-8 parts of bionic non-toxic auxiliary agent.

2. The device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology according to claim 1, characterized in that: The rotating plate (1) comprises a rotating plate handle (11), the rotating plate handle (11) being mounted and connected to the rotating plate buckle, the rotating plate buckle being divided into a rotating plate lower buckle (12) and a rotating plate upper buckle (13), the rotating plate lower buckle (12) and the rotating plate upper buckle (13) being mounted and connected via a bayonet connector (14).

3. The device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology according to claim 2, characterized in that: The rotating plate handle (11) is provided with a handle through hole (15) penetrating the rotating plate handle (11), and the inner wall surfaces of the rotating plate lower buckle (12) and the rotating plate upper buckle (13) are both provided with two continuous arcs, and the connection between the arcs forms a buckle groove (16).

4. The device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology according to claim 1, characterized in that: The fixed base plate (2) comprises a fixed base plate handle (21), the fixed base plate handle (21) is mounted and connected to the rotating plate clamping ring (22), and a nut mounting clamping ring (23) is mounted and connected to the lower part of the rotating plate clamping ring (22).

5. The device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology according to claim 4, characterized in that: The nut mounting clamp (23) of the fixed base plate (2) is engaged with the external thread of the mounting nut (3) via an internal thread, a branch chain mounting clamp groove (24) for mounting a fixed branch chain (5) is provided on the outer peripheral side of the nut mounting clamp (23), and a fixed base plate through hole (25) is provided on the rotating plate clamp (22) and the nut mounting clamp (23).

6. The device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology according to claim 1, characterized in that: The mounting nut (3) comprises a mounting nut body (31), the inner surface of the mounting nut body (31) being provided with an expansion plate mounting clamp (32) and an expansion plate mounting clamp groove (33) for mounting and connecting with the expansion plate (4), and the outer surface of the mounting nut body (31) being provided with threads.

7. The device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology according to claim 1, characterized in that: The fixed branch chain (5) comprises a fixed branch chain mounting seat (51) mounted and connected to the fixed base plate (2); a first branch chain arm (52) having rotation joints at both ends is mounted and connected to the fixed branch chain mounting seat (51); a second branch chain arm (53) having rotation joints at both ends is mounted and connected to the first branch chain arm (52); and a branch chain fixing mounting screw assembly (54) is mounted and connected to the end of the second branch chain arm (53).

8. The device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology according to claim 2, characterized in that: A handle through-hole top screw is installed in the handle through-hole (15) of the rotating plate handle (11).

9. The device for retracting and expanding brain tissue in variable depth craniocerebral surgery based on release technology according to claim 1, characterized in that: The bionic non-toxic auxiliary agent includes one or more of a defoamer, an antistatic agent, a stabilizer, a leveling agent, a film-forming agent, a lubricant, an antioxidant, and a mildew-proof agent.

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