A neurointervention head and neck support device

Abstract

The present invention relates to the field of medical equipment technology, and in particular to a neurointervention head and neck support device, which includes a support system, a skull pin and an adjustment mechanism. Before the operation, the skull pin is aligned with the positioning point of the patient's head, and the first support and the second support are brought close to each other through the adjustment mechanism, so that the secondary pin, the adjustment mechanism and the main pin are inserted into the patient's head skin in sequence. When the secondary pin abuts against the skull, the first support and the second support continue to approach each other, and the skull squeezes the secondary pin, so that the secondary pin moves axially, and the distance between the main pin and the secondary pin is reduced. When the distance between the main pin and the secondary pin reaches the minimum value, the support component abuts against the skull, thereby increasing the contact area between the skull pin and the skull, and avoiding the skull pin from causing damage to the patient's skull. And by setting a limit component or setting the end of the secondary pin facing the main pin and the receiving groove to a cone, the problem of the skull pin causing damage to the skull due to the shaking of the hands of medical staff during the postoperative disassembly process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a neurointervention head and neck support device. Background Art

[0002] During neurointerventional surgery, it is necessary to drill holes in the skulls of some patients. During the drilling process, if the patient's head moves, it will affect the accuracy and safety of the operation, and ultimately affect the normal progress of the operation. In order to ensure the accuracy and safety of the operation, a head and neck support device is needed to support and fix the patient's skull before the operation. In neurosurgery, a three-pin fixator is generally used to support and fix the patient's head. After the support and fixation are completed, the doctor performs the corresponding operation according to the symptoms.

[0003] It is found in clinical practice that when a three-pin fixator is used to support the patient's head, the line connecting the three pins often does not form an isosceles triangle, and there is a risk of head frame collapse and fixation failure during subsequent craniotomy. For this reason, a Chinese patent document with publication number CN116059068A discloses a positioning support device and method for head surgery, which solves the above problems. However, in combination with the head and neck support device in the prior art, the following problems still exist: First, in a scenario where only one skull pin bears the weight of the patient's head, this situation will cause stress concentration, and the skull pin will cause damage to the patient's head; Second, after the operation is completed, the head frame needs to be disassembled. During the process of disassembling the head frame, if the medical staff's hands shake, it will cause secondary damage to the patient's skull. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention proposes a neurointervention head and neck support device, which solves the problem that the skull pins in the prior art head and neck support device cause damage to the skull during preoperative preparation and postoperative disassembly.

[0005] A neurointervention head and neck support device of the present invention adopts the following technical solution: comprising:

[0006] A bracket system includes a first bracket and a second bracket, which are plugged into each other and can move closer to or farther from each other along a first direction;

[0007] A plurality of skull pins are provided, and the skull pins include a main pin, a secondary pin and a support assembly; the plurality of skull pins are respectively connected to a first bracket and a second bracket; the axis of the main pin extends along a first direction, one end of the main pin is connected to the first bracket or the second bracket, and the other end is provided with a receiving groove; the secondary pin is connected to one end of the main pin provided with the receiving groove, and the secondary pin can be slidably installed in the receiving groove along the first direction, and the end of the secondary pin away from the main pin is in a cone shape with the large end facing the main pin, and is used for fixing and supporting the skull; the support assembly is configured to abut against the skull when the distance between the main pin and the secondary pin is reduced to a minimum value;

[0008] The adjustment mechanism is used to adjust the distance between the first bracket and the second bracket.

[0009] Optionally, the support assembly includes a plurality of steel bars, which are distributed along the circumference of the main nail, have one end fixedly connected to the main nail, and the other end fixedly connected to the auxiliary nail, and the steel bars can undergo elastic deformation.

[0010] Optionally, the accommodating groove and the end of the auxiliary nail facing the main nail are both cylindrical; the skull nail also includes a limiting component, which is used to limit the relative movement of the main nail and the auxiliary nail in the axial direction when the distance between the main nail and the auxiliary nail is maximum and minimum.

[0011] Optionally, the limiting assembly includes a limiting ring, a first limiting groove and a second limiting groove; the first limiting groove and the second limiting groove are both annular, and are arranged in the accommodating groove at intervals along the first direction, and the limiting ring is sleeved on the end of the secondary nail close to the main nail, and the limiting ring is a rubber ring. When the distance between the secondary nail and the main nail is the smallest, the limiting ring is located in the first limiting groove, and when the distance between the secondary nail and the main nail is the largest, the limiting ring is located in the second limiting groove.

[0012] Optionally, the receiving groove is tapered, one end of the secondary nail facing the main nail is tapered, and the tapers of the receiving groove and the secondary nail are consistent.

[0013] Optionally, the steel bars are evenly distributed along the circumference of the main pin, and a plurality of steel bars of the same skull pin define a receiving cavity filled with medicine.

[0014] Optionally, the first bracket and the second bracket both include a connecting end and a mounting end; the connecting end of the first bracket is inserted into the connecting end of the second bracket; the adjustment mechanism includes a limit bolt and a ratchet bar; the ratchet bar extends along the first direction and is arranged at the connecting end of the first bracket; the limit bolt can be movably installed at the connecting end of the second bracket along the second direction, and the second direction is perpendicular to the first direction; the limit bolt extends into the end of the second bracket and is fixedly connected to a wedge block, and a spring is connected between the limit bolt and the second bracket, and the spring makes the wedge block tend to approach the ratchet bar; the direction of the ratchet bar is set so that when the wedge block abuts against the ratchet bar, the first bracket can approach the second bracket.

[0015] Optionally, the mounting end of the second bracket is rotatably connected to a mounting frame, the rotation axis of the second bracket extends along the first direction, and at least two skull pins are mounted on the mounting frame; and at least one skull pin is mounted on the mounting end of the first bracket.

[0016] Optionally, the main nail is detachably connected to the mounting frame or the first bracket.

[0017] Optionally, a connecting ring is fixedly mounted on the mounting end of the second bracket, the connecting ring is detachably connected to the third bracket, and the other end of the third bracket is detachably connected to the operating table.

[0018] The beneficial effects of the present invention are as follows: before performing an operation, a neurointerventional head and neck support device of the present invention aligns the skull pin with the positioning point of the patient's head, and through an adjusting mechanism, the first bracket and the second bracket are brought close to each other, and then the end of the auxiliary pin is inserted into the patient's head skin, the first bracket and the second bracket continue to approach each other, and the main pin is inserted into the patient's head. After the end of the auxiliary pin abuts against the skull, during the process of the first bracket and the second bracket approaching each other, the skull squeezes the auxiliary pin, so that the auxiliary pin is axially close to the main pin connected to it, and moves into the accommodating groove; when the distance between the main pin and the auxiliary pin is reduced to a minimum value, the support assembly abuts against the skull, thereby increasing the contact area between the skull pin and the skull; and then in the scenario where only one nail bears the weight of the patient's head, stress concentration is reduced to avoid damage to the patient's skull caused by the skull pin.

[0019] Furthermore, by setting a limit assembly or setting the end of the secondary pin facing the main pin and the receiving groove to a cone shape, the problem of the skull pin causing damage to the skull due to the shaking of the medical staff's hands when the skull pin is not completely removed during the postoperative disassembly process is solved. Multiple steel bars of the same skull pin define a receiving cavity, which is filled with medicine. When the main pin and the secondary pin are close to each other, the medicine in the receiving cavity flows out from the gap, so as to accurately apply the medicine to the position where the skull pin is inserted into the skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of a neurointervention head and neck support device of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall structure of the cranial pin in the present invention;

[0023] Figure 3is a side view of a cranial pin in the first embodiment of the present invention;

[0024] Figure 4 The first state of the first embodiment of the present invention is Figure 3 Middle AA section cutaway view;

[0025] Figure 5 The first embodiment of the present invention is in the second state. Figure 3 Middle AA section cutaway view;

[0026] Figure 6 is a side view of a skull pin in a second embodiment of the present invention;

[0027] Figure 7 The second embodiment of the present invention is in the first state. Figure 6 Middle BB section cutaway view;

[0028] Figure 8 The second embodiment of the present invention is in the second state. Figure 6 Cross-sectional view of the middle BB section.

[0029] In the figure: 100, support system; 110, first support; 120, second support; 130, mounting frame; 140, connecting ring; 200, skull pin; 210, main pin; 211, receiving groove; 220, auxiliary pin; 230, supporting assembly; 231, steel bar; 232, receiving cavity; 240, limiting assembly; 241, limiting ring; 242, first limiting groove; 243, second limiting groove; 300, adjusting mechanism; 310, limiting bolt; 320, ratchet bar. DETAILED DESCRIPTION

[0030] 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 making creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 5 As shown, a neurointervention head and neck support device provided by the first embodiment of the present invention includes a support system 100, a skull pin 200 and an adjustment mechanism 300;

[0032] The bracket system 100 includes a first bracket 110 and a second bracket 120, which are plugged into each other and can be moved along a first direction (i.e. Figure 1 Left and right directions as shown) move closer or farther away from each other;

[0033] There are multiple skull pins 200, and the skull pins 200 include a main pin 210, a secondary pin 220, and a supporting assembly 230; the multiple skull pins 200 are respectively connected to the first bracket 110 and the second bracket 120; the axis of the main pin 210 extends along the first direction, one end of the main pin 210 is connected to the first bracket 110 or the second bracket 120, and the other end is provided with a receiving groove 211; the secondary pin 220 is connected to one end of the main pin 210 provided with the receiving groove 211, and the secondary pin 220 can be slidably installed in the receiving groove 211 along the first direction, and the end of the secondary pin 220 away from the main pin 210 is in a cone shape with the large end facing the main pin 210, which is used for fixing and supporting the skull; the supporting assembly 230 is configured to abut against the skull when the distance between the main pin 210 and the secondary pin 220 is reduced to a minimum value, thereby increasing the contact area between the skull pin 200 and the skull;

[0034] The adjustment mechanism 300 is used to adjust the distance between the first bracket 110 and the second bracket 120 .

[0035] Before the operation, the skull pin 200 is aligned with the positioning point of the patient's head, and the first bracket 110 and the second bracket 120 are brought close to each other through the adjustment mechanism 300, so that the end of the secondary pin 220 is inserted into the patient's head skin, and the first bracket 110 and the second bracket 120 continue to approach each other, and the main pin 210 is inserted into the patient's head. When the end of the secondary pin 220 abuts against the skull, during the process of the first bracket 110 and the second bracket 120 approaching each other, the skull squeezes the secondary pin 220, so that the secondary pin 220 is axially close to the main pin 210 connected to it, and moves into the receiving groove 211, refer to Figure 1 , the auxiliary nail 220 on the left moves to the left, and the auxiliary nail 220 on the right moves to the right; Figure 4 The status shown changes to Figure 5 The state shown; when the distance between the main nail 210 and the auxiliary nail 220 is reduced to the minimum value, the support assembly 230 abuts against the skull, thereby increasing the contact area between the skull nail 200 and the skull, dispersing the supporting force of the auxiliary nail 220 on the skull, and reducing stress concentration when only one nail bears the weight of the patient's head, thereby avoiding damage to the patient's skull caused by the skull nail 200.

[0036] In a further embodiment, the support assembly 230 includes a plurality of steel bars 231 , which are distributed along the circumference of the main nail 210 , one end of which is fixedly connected to the main nail 210 , and the other end of which is fixedly connected to the secondary nail 220 , and the steel bars 231 can undergo elastic deformation.

[0037] During the surgical preparation stage, the skull pin 200 is aligned with the positioning point of the patient's head, and the first bracket 110 and the second bracket 120 are brought close to each other through the adjustment mechanism 300. After the end of the secondary pin 220 is inserted into the patient's head, the first bracket 110 and the second bracket 120 continue to approach each other, and the steel bar 231 and the main pin 210 are inserted into the patient's head in sequence. When the end of the secondary pin 220 abuts against the skull, during the process of the first bracket 110 and the second bracket 120 approaching each other, the skull squeezes the secondary pin 220, causing the secondary pin 220 to move into the receiving groove 211. During the axial movement of the secondary pin 220, the steel bar 231 undergoes elastic deformation and accumulates force, thereby Figure 4 The status shown changes to Figure 5 In the state shown, the contact area between the skull pin 200 and the skull is increased, and the bent steel bar 231 shares the force of the auxiliary nail 220 in supporting the skull, thereby reducing stress concentration when only one nail bears the weight of the patient's head, thereby preventing the skull pin 200 from causing damage to the patient's skull.

[0038] When the support device is disassembled after the operation, one medical staff supports the patient's head, and the other medical staff uses the adjustment mechanism 300 to move the first bracket 110 and the second bracket 120 away from each other. During this process, the main nail 210 moves away from the skull, and the steel bar 231 gradually releases the elastic force. When the distance between the first bracket 110 and the second bracket 120 increases to a preset value, all the steel bars 231 return to their original length. Thereafter, during the process of the first bracket 110 and the second bracket 120 gradually moving away from each other, the main nail 210 moves synchronously with the connected first bracket 110 or second bracket 120, and the main nail 210 drives the auxiliary nail 220 to gradually move away through the connected steel bar 231 until the auxiliary nail 220 is detached from the patient's head skin, and the disassembly work is completed.

[0039] In a further embodiment, the receiving groove 211 and the end of the secondary nail 220 facing the main nail 210 are both cylindrical; the skull nail 200 also includes a limiting assembly 240, which is used to limit the relative movement of the main nail 210 and the secondary nail 220 in the axial direction when the distance between the main nail 210 and the secondary nail 220 is the largest and the smallest. The limiting assembly 240 includes a limiting ring 241, a first limiting groove 242 and a second limiting groove 243; the first limiting groove 242 and the second limiting groove 243 are both annular, and the two are spaced apart in the receiving groove 211 along the first direction. The limiting ring 241 is sleeved on the end of the secondary nail 220 close to the main nail 210, and the limiting ring 241 is a rubber ring. When the distance between the secondary nail 220 and the main nail 210 is the smallest, the limiting ring 241 is located in the first limiting groove 242, and when the distance between the secondary nail 220 and the main nail 210 is the largest, the limiting ring 241 is located in the second limiting groove 243.

[0040] During the surgical preparation stage, the first bracket 110 and the second bracket 120 are brought close to each other through the adjustment mechanism 300, so that the auxiliary nail 220, the supporting assembly 230, and the main nail 210 are inserted into the patient's head skin in sequence. When the end of the auxiliary nail 220 abuts against the skull, in the process of the first bracket 110 and the second bracket 120 approaching each other, the skull squeezes the auxiliary nail 220, so that the auxiliary nail 220 moves into the receiving groove 211, and the limiting ring 241 is elastically deformed and disengaged from the second limiting groove 243. In the process of the auxiliary nail 220 moving axially, the steel bar 231 is elastically deformed and stores force. In the process of the first bracket 110 and the second bracket 120 approaching each other, the limiting ring 241 moves in the receiving groove 211 toward the first limiting groove 242 until it is clamped in the first limiting groove 242. At this time, the distance between the main nail 210 and the auxiliary nail 220 is the smallest, and the two cannot move axially. At this time, the state of the skull nail 200 is as follows: Figure 5 As shown, the bent steel bar 231 is in contact with the skull, and the contact area between the skull pin 200 and the skull is increased, thereby avoiding damage to the patient's skull due to stress concentration.

[0041] When the support device is disassembled after the operation, one medical staff supports the patient's head, and the other medical staff uses the adjustment mechanism 300 to move the first bracket 110 and the second bracket 120 away from each other. During this process, the main nail 210 is away from the skull. At this time, the limiting ring 241 is in the first limiting groove 242. The main nail 210 drives the auxiliary nail 220 to move synchronously, gradually away from the skull, until the auxiliary nail 220 is detached from the patient's head skin, and the disassembly work is completed. During the disassembly process, the relative distance between the first bracket 110 and the second bracket 120 can drive the auxiliary nail 220 away from the skull, thereby avoiding secondary damage to the patient's skull due to hand shaking of medical staff during the postoperative disassembly process.

[0042] In a further embodiment, the steel bars 231 are evenly distributed along the circumference of the main nail 210, and the multiple steel bars 231 of the same skull nail 200 define a accommodating cavity 232, which is filled with medicine. Anti-inflammatory drugs or anesthetics can be stored in the accommodating cavity 232 as needed. When the distance between the main nail 210 and the auxiliary nail 220 is at the maximum, the accommodating cavity 232 can be approximately regarded as a closed state. When the distance between the main nail 210 and the auxiliary nail 220 decreases, a gap appears between two adjacent steel bars 231. In the process of the main nail 210 and the auxiliary nail 220 approaching each other, the medicine in the accommodating cavity 232 flows out of the gap, thereby accurately applying the medicine to the position where the skull nail 200 is inserted into the skin.

[0043] In a further embodiment, the first bracket 110 and the second bracket 120 both include a connecting end and a mounting end; the connecting end of the first bracket 110 is inserted into the connecting end of the second bracket 120; the adjustment mechanism 300 includes a stopper 310 and a ratchet bar 320; the ratchet bar 320 extends along a first direction and is disposed at the connecting end of the first bracket 110; the stopper 310 can be moved along a second direction (i.e. Figure 1 The first bracket 110 is movably installed on the connecting end of the second bracket 120 in the up and down direction shown in the figure, and the second direction is perpendicular to the first direction; one end of the limiting bolt 310 extending into the second bracket 120 is fixedly connected with a wedge block, and a spring is connected between the limiting bolt 310 and the second bracket 120, and the spring makes the wedge block tend to approach the ratchet bar 320; the direction of the ratchet bar 320 is set to when the wedge block abuts against the ratchet bar 320, the first bracket 110 is close to the second bracket 120.

[0044] During the surgical preparation stage, the skull pin 200 is aligned with the positioning point of the patient's head. At this time, the wedge block and the ratchet bar 320 are in abutment. The medical staff can make the first bracket 110 and the second bracket 120 approach each other. As the first bracket 110 and the second bracket 120 approach each other, the auxiliary pin 220, the support assembly 230, and the main pin 210 are inserted into the patient's head skin in sequence until the end of the auxiliary pin 220 abuts against the skull, and the auxiliary pin 220 abuts against the receiving groove 211 toward the end of the main pin 210; thereafter, the operation is performed. During the operation, since the wedge block and the ratchet bar 320 are in abutment, the first bracket 110 and the second bracket 120 will not move away from each other. When the head and neck support device is disassembled after the operation, one medical staff supports the patient's head, and the other medical staff pulls down the limit bolt 310. The limit bolt 310 drives the wedge block away from the ratchet bar 320. At this time, the first bracket 110 and the second bracket 120 can move away from each other. In the process of moving away from each other, the main nail 210 and the auxiliary nail 220 are driven to move away from each other until the auxiliary nail 220 is detached from the patient's head skin, and the disassembly work is completed.

[0045] In a further embodiment, referring to Figure 1 The mounting end of the second bracket 120 is rotatably connected to the mounting frame 130, and the mounting frame 130 includes a rotating shaft and at least two arc-shaped mounting claws. The rotating shaft can be rotatably mounted on the mounting end of the second bracket 120 along its own axis, and the axis of the rotating shaft extends along the first direction. The mounting claws are evenly distributed and fixedly connected to the rotating shaft along the circumference of the rotating shaft; a skull pin 200 is installed on each mounting claw; at least one skull pin 200 is installed on the mounting end of the first bracket 110; a positioning member for limiting the rotation of the rotating shaft is provided on the second bracket 120, and the positioning member can be a top screw.

[0046] In a further embodiment, the main nail 210 is detachably connected to the mounting claw or the first bracket 110 to facilitate subsequent maintenance.

[0047] In a further embodiment, the mounting end of the second bracket 120 is also fixedly mounted with a connecting ring 140, the connecting ring 140 is detachably connected to a third bracket, and the other end of the third bracket is detachably connected to the operating table. In the preparation stage of the operation, the skull pin 200 is aligned with the positioning point of the patient's head, so that the first bracket 110 and the second bracket 120 are close to each other, and after the end of the secondary pin 220 facing the main pin 210 abuts against the receiving groove 211, the two ends of the third bracket are respectively connected to the operating table and the connecting ring 140; the third bracket can be the main base plate disclosed in CN116059068A.

[0048] One of the preferred embodiments of the present invention is shown in FIG. Figure 6 , Figure 7 and Figure 8 The receiving groove 211 is tapered, and one end of the secondary nail 220 facing the main nail 210 is tapered, and the tapers of the receiving groove 211 and the secondary nail 220 are consistent.

[0049] During the surgical preparation stage, the first bracket 110 and the second bracket 120 are brought close to each other through the adjustment mechanism 300, and the auxiliary nail 220, the support assembly 230, and the main nail 210 are inserted into the patient's head skin in sequence. When the end of the auxiliary nail 220 abuts against the skull, in the process of the first bracket 110 and the second bracket 120 approaching each other, the skull squeezes the auxiliary nail 220, causing the auxiliary nail 220 to move into the receiving groove 211, and the steel bar 231 undergoes elastic deformation to store force, and the first bracket 110 and the second bracket 120 continue to approach each other until the receiving groove 211 abuts against the auxiliary nail 220. At this time, the distance between the main nail 210 and the auxiliary nail 220 is the smallest, and the two cannot move axially; at this time, the state of the skull nail 200 is as follows: Figure 8 As shown, the bent steel bar 231 is in contact with the skull, and the contact area between the skull pin 200 and the skull is increased, thereby avoiding damage to the patient's skull due to stress concentration.

[0050] When the head and neck support device is disassembled after the operation, one medical staff supports the patient's head, and the other medical staff uses the adjustment mechanism 300 to move the first bracket 110 and the second bracket 120 away from each other. During this process, the main nail 210 is away from the skull, the steel bar 231 gradually releases the elastic force, and the distance between the main nail 210 and the auxiliary nail 220 increases. When a gap appears between the main nail 210 and the auxiliary nail 220, even if the medical staff shakes their hands in the process of moving the first bracket 110 and the second bracket 120 away from each other, only the first bracket 110 and the second bracket 120 will be driven to shake. During the shaking of the first bracket 110 or the second bracket 120, the main nail 210 moves radially relative to the auxiliary nail 220, and does not drive the auxiliary nail 220 to move on the patient's skull. By setting the end of the auxiliary nail 220 facing the main nail 210 and the accommodating groove 211 to a cone, the problem of the skull nail 200 causing damage to the skull due to the shaking of the medical staff's hands during the postoperative disassembly process is solved.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A neurointervention head and neck support device, characterized in that: include: A bracket system includes a first bracket and a second bracket, which are plugged into each other and can move closer to or farther from each other along a first direction; There are multiple skull pins, including a main pin, a secondary pin and a supporting assembly; A plurality of cranial pins are respectively connected to the first bracket and the second bracket; The axis of the main nail extends along the first direction, one end of the main nail is connected to the first bracket or the second bracket, and the other end is provided with a receiving groove; The auxiliary nail is connected to one end of the main nail with a receiving groove, and the auxiliary nail can be slidably installed in the receiving groove along a first direction. The end of the auxiliary nail away from the main nail is tapered with the large end facing the main nail, and is used to fix and support the skull; the support assembly is configured to abut against the skull when the distance between the main nail and the auxiliary nail is reduced to a minimum value; the support assembly includes a plurality of steel bars, which are distributed along the circumference of the main nail, one end of which is fixedly connected to the main nail, and the other end of which is fixedly connected to the auxiliary nail, the steel bars can undergo elastic deformation, and the plurality of steel bars define a receiving cavity that can be filled with medicine; the skull nail also includes a limiting The limiting assembly is used to limit the relative movement of the main nail and the auxiliary nail in the axial direction when the distance between the two is the largest and the smallest. The limiting assembly includes a limiting ring, a first limiting groove and a second limiting groove; the first limiting groove and the second limiting groove are both annular, and the two are arranged in the receiving groove at intervals along the first direction. The limiting ring is sleeved on the end of the auxiliary nail close to the main nail. The limiting ring is a rubber ring. When the distance between the auxiliary nail and the main nail is the smallest, the limiting ring is located in the first limiting groove, and when the distance between the auxiliary nail and the main nail is the largest, the limiting ring is located in the second limiting groove; The adjustment mechanism is used to adjust the distance between the first bracket and the second bracket.

2. A neurointervention head and neck support device according to claim 1, characterized in that: The accommodating groove and one end of the secondary nail facing the main nail are both cylindrical.

3. The neurointervention head and neck support device according to claim 1, characterized in that: The receiving groove is tapered, and one end of the auxiliary nail facing the main nail is tapered, and the tapers of the receiving groove and the auxiliary nail are consistent.

4. A neurointervention head and neck support device according to claim 2 or 3, characterized in that: The first bracket and the second bracket both include a connecting end and an installation end; the connecting end of the first bracket is inserted into the connecting end of the second bracket; the adjustment mechanism includes a limit bolt and a ratchet bar; the ratchet bar extends along the first direction and is arranged at the connecting end of the first bracket; the limit bolt can be movably installed at the connecting end of the second bracket along the second direction, and the second direction is perpendicular to the first direction; the end of the limit bolt extending into the second bracket is fixedly connected to a wedge block, and a spring is connected between the limit bolt and the second bracket, and the spring makes the wedge block tend to approach the ratchet bar; the direction of the ratchet bar is set so that when the wedge block abuts against the ratchet bar, the first bracket can approach the second bracket.

5. The neurointervention head and neck support device according to claim 4, characterized in that: The mounting end of the second bracket is rotatably connected to the mounting frame, the rotation axis of the second bracket extends along the first direction, and at least two skull pins are installed on the mounting frame; the mounting end of the first bracket is installed with at least one skull pin.

6. The neurointervention head and neck support device according to claim 5, characterized in that: The main nail is detachably connected to the mounting frame or the first bracket.

7. The neurointervention head and neck support device according to claim 6, characterized in that: A connecting ring is also fixedly mounted on the mounting end of the second bracket, the connecting ring is detachably connected to the third bracket, and the other end of the third bracket is detachably connected to the operating table.

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