Fixator for adjusting neck bending angle of Pingshan disease patient in magnetic resonance imaging

Abstract

The fixator for adjusting the neck bending angle of the Pingshan disease patient during magnetic resonance imaging comprises a head support and a chest and back support, and the head support comprises a head backup plate, a head support bottom plate, a head support rotating shaft and a first positioning device used for fixing the rotating position of the head backup plate; the chest and back support comprises a back backup plate, a chest and back support bottom plate, a chest and back support rotating shaft and a second positioning device used for fixing the rotating position of the back backup plate. A patient suffering from the flat mountain disease obtains the optimal cervical vertebra nuclear magnetic resonance flexion position, the patient is effectively fixed, the patient is prevented from moving in the examination process, adjustment is conducted according to different patients, the neck flexion position angle is flexibly controlled through a single support or two supports, and the cervical vertebra flexion position angle is controlled. The problem that angle adjustment of the bending position magnetic resonance examination of the patient suffering from the Pingshan disease is only limited to adjustment of the bending angle of the head and the neck is solved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a fixator for patients with Hirayama disease that can adjust the neck flexion angle. Background Art

[0002] Hirayama disease, also known as juvenile distal muscular atrophy of the upper extremities or single-cell muscular atrophy, is mainly characterized by unilateral or asymmetrical weakness and muscular atrophy of the hand and forearm muscles supplied by the C7-T1 muscle group. The clinical manifestations of Hirayama disease include muscle atrophy and muscle weakness limited to the upper extremities, mainly atrophy of the intrinsic hand muscles and the ulnar muscle group of the forearm, while the brachioradialis muscle on the radial side of the forearm is often not affected. As the disease progresses, atrophy of the corresponding muscle groups gradually appears, mostly unilateral damage, and some can also be manifested as asymmetrical bilateral damage.

[0003] With the development of the understanding of this disease, magnetic resonance imaging (MRI) has now been recognized as an important imaging examination for the diagnosis of Hirayama disease. Among them, the flexion position of cervical spine MRI can better show the characteristic imaging manifestations of Hirayama disease. Studies have shown that during the flexion position examination of patients with Hirayama disease, the recommended flexion angle of the patient is 25° to 40°. When the flexion angle is 25°, the appearance rate of widened epidural space is 70%. Above 25° is the basic requirement for the diagnosis of HD, and above 35° may be the best diagnostic flexion angle for HD. It can be seen that the larger the flexion angle within the recommended value range, especially when the neck is in a flexed state (≥35°), the more obvious the characteristic imaging manifestation (crescent-shaped vascular flow void) of Hirayama disease appears, which is crucial for the diagnosis of Hirayama disease and avoiding missed or misdiagnosed cases.

[0004] However, due to the weakness of the upper extremities of patients with Hirayama disease, they are unable to spontaneously reach and maintain the posture of the flexion position of cervical spine MRI. Therefore, it is necessary to fix the patients with Hirayama disease as shown, so that the patients with Hirayama disease can maintain the posture of the flexion position of cervical spine MRI, enabling the patients with Hirayama disease to undergo MRI examination. In the early years of clinical practice, the flexion position was commonly achieved by using soft pads or sandbags to elevate the occipital bone. Since the soft pads and sandbags are relatively soft, they cannot effectively support the weight of the head and have weak ability to maintain cervical flexion. The situation where the neck position is different before and after the examination often occurs. At the same time, the method of using soft pads or sandbags to flex the neck cannot accurately control the flexion angle, and there are often cases where the examination fails due to insufficient flexion angle. In recent years, there have also been many improved fixing devices in the industry, but these technologies generally have the problem that the angle adjustment for flexion position MRI examination is only limited to adjusting the flexion angle of the head and neck, making it impossible for patients with Hirayama disease to reach the optimal flexion angle. Therefore, it is necessary to design a fixing frame for patients with Hirayama disease with a larger adjustment range and a more convenient adjustment method to meet the actual needs of patients with Hirayama disease. Summary of the Invention

[0005] The object of the present invention is to provide a fixator for adjusting the neck flexion angle of magnetic resonance imaging (MRI) of patients with Hirayama disease, so as to solve the problems existing in the above-mentioned prior art, and at the same time adjust the bending angles of the head and the chest and back of patients with Hirayama disease, enabling patients with Hirayama disease to undergo MRI examinations while maintaining the optimal cervical MRI flexion position, and obtaining accurate examination results.

[0006] To achieve the above object, the present invention provides the following solution:

[0007] The present invention provides a fixator for adjusting the neck flexion angle of magnetic resonance imaging of patients with Hirayama disease, comprising a head support and a chest and back support;

[0008] The head support includes a head backrest, a head support bottom plate and a head support rotating shaft. The head backrest is rotatably mounted on the head support bottom plate through the head support rotating shaft. The head support further includes a first positioning device for fixing the rotation position of the head backrest. One end of the head support for docking and cooperating with the chest and back support bottom plate is provided with a first docking member;

[0009] The chest and back support includes a backrest, a chest and back support bottom plate and a chest and back support rotating shaft. The back support is rotatably mounted on the chest and back support bottom plate through the chest and back support rotating shaft. The chest and back support further includes a second positioning device for fixing the rotation position of the backrest. One end of the chest and back support bottom plate for docking and cooperating is provided with a second docking member capable of being connected to the first docking member.

[0010] Preferably, the head support further includes a head fixing assembly. The head fixing assembly includes a head gasket and a head fixator. The head gasket is arranged on the surface of the head backrest for supporting the patient's head. The position of the head fixing assembly corresponds to that of the head gasket for fixing the patient's forehead.

[0011] Preferably, the head gasket is a flexible gasket and is installed in a first groove on the head backrest. The head fixator is a strap for fixing the patient's head and the head backrest together.

[0012] Preferably, a handle is arranged at one end of the head backrest away from the head support rotating shaft. The first positioning device includes:

[0013] A first card slot, which is arranged on one of the bottom surface of the head backrest or the top surface of the head support bottom plate;

[0014] The first support plate, the first end of the first support plate is hinged to the other one of the bottom surface of the headrest plate and the top surface of the headrest bracket bottom plate, the second end of the first support plate is used to be clamped in the first clamping groove, the first end of the first support plate is hinged on the first connecting shaft, and a first locking knob is arranged at one end of the first connecting shaft.

[0015] Preferably, the chest and back bracket further includes a chest and back fixing component, the chest and back fixing component includes a back gasket and a chest fixator, the back gasket is arranged on the surface of the backrest plate and is used to support the back of the patient, and the position of the chest fixing component corresponds to that of the back gasket and is used to fix the chest and upper limbs of the patient.

[0016] Preferably, the back gasket is a flexible gasket and is installed in the second groove of the backrest plate, the chest fixator is a strap, and the chest fixator fixes the chest and upper limbs of the patient to the backrest plate together.

[0017] Preferably, a handle is arranged at one end of the backrest plate away from the chest and back bracket rotating shaft, and the second positioning device includes:

[0018] A second clamping groove, which is arranged on one of the bottom surface of the backrest plate or the top surface of the backrest bracket bottom plate;

[0019] The second support plate, the first end of the second support plate is hinged to the other one of the bottom surface of the backrest plate and the top surface of the chest and back bracket bottom plate, the second end of the second support plate is used to be clamped in the clamping groove, the first end of the second support plate is hinged on the second connecting shaft, and a second locking knob is arranged at one end of the second connecting shaft.

[0020] Preferably, one end of the headrest bracket rotating shaft is connected to the edge of the headrest bracket bottom plate, a protractor one is installed at the connection position between the headrest bracket rotating shaft and the headrest bracket bottom plate, the protractor one is perpendicular to the headrest bracket bottom plate, one end of the chest and back bracket rotating shaft is connected to the edge of the chest and back bracket bottom plate, and a protractor two is installed at the connection position between the chest and back bracket rotating shaft and the chest and back bracket bottom plate, and the protractor two is perpendicular to the chest and back bracket bottom plate.

[0021] Preferably, the first docking member includes two first pipe fittings, the second docking member includes two second pipe fittings corresponding to the first pipe fittings, the first pipe fittings and the second pipe fittings can be inserted and connected, the lengths of the first pipe fittings and / or the second pipe fittings are adjustable, and a locking nut is sleeved on one of the first pipe fittings or the second pipe fittings, and a thread portion adapted to the locking nut is arranged on the other one.

[0022] Preferably, a first fixing device is provided on the bottom surface of the head support base plate, and a second fixing device is provided on the bottom surface of the chest and back support base plate.

[0023] During use, adaptive adjustments need to be made for different patients. When the head support and the chest and back support cooperate, the first docking member on the head support is docked with the second docking member on the chest and back support. After docking, the device is placed on the examination table of the examination equipment. The patient lies flat on the examination table, with the head fitting against the headrest and the back fitting against the backrest. Then, adjust the rotation angles of the headrest and the backrest. After completion of the adjustment, fix the rotation position of the headrest through the first positioning device and fix the rotation position of the backrest through the second positioning device, so that the patient enters the magnetic resonance imaging machine for examination in the best cervical magnetic resonance flexion position.

[0024] Compared with the prior art, the present invention has achieved the following technical effects relative to the prior art:

[0025] The adjustable fixing frame for the flexion angle of the neck in magnetic resonance imaging of patients with Hirayama disease provided by the present invention can continuously adjust a certain angle by using the positioning device, and at the same time flex the head and chest and back of the patients with Hirayama disease, so that the patients with Hirayama disease can obtain the best cervical magnetic resonance flexion position state, overcoming the problem that the angle adjustment of the flexion position magnetic resonance examination of patients with Hirayama disease is only limited to adjusting the flexion angle of the head and neck.

[0026] In other technical solutions protected by the present invention, there are further effects:

[0027] 1. The adjustable fixing frame for the flexion angle of the neck in magnetic resonance imaging of patients with Hirayama disease provided by the present invention can effectively fix the patient, prevent the patient from moving during the magnetic resonance examination, and enable the patient to maintain the best cervical magnetic resonance flexion position for examination;

[0028] 2. The adjustable fixing frame for the flexion angle of the neck in magnetic resonance imaging of patients with Hirayama disease provided by the present invention uses flexible rubber pads to support the head and back of the patient, improves the comfort of the patient during the examination, reduces the sense of restraint of the patient, and avoids the patient's struggle resulting in body movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1Schematic diagram of the overall structure of the fixator for adjusting the neck flexion angle of magnetic resonance imaging of patients with Hirayama disease in the embodiments of the present invention;

[0031] Figure 2 Front view cross-sectional view of the overall structure of the fixator for adjusting the neck flexion angle of magnetic resonance imaging of patients with Hirayama disease in the embodiments of the present invention;

[0032] Figure 3 Top view of the overall structure of the fixator for adjusting the neck flexion angle of magnetic resonance imaging of patients with Hirayama disease in the embodiments of the present invention;

[0033] Figure 4 Bottom view of the overall structure of the fixator for adjusting the neck flexion angle of magnetic resonance imaging of patients with Hirayama disease in the embodiments of the present invention;

[0034] Figure 5 Schematic diagram of the main structure of the head support base plate in the embodiments of the present invention;

[0035] Figure 6 Schematic diagram of the main structure of the chest and back support base plate in the embodiments of the present invention;

[0036] Figure 7 Schematic diagram of the dorsal structure of the head rest board in the embodiments of the present invention;

[0037] Figure 8 Schematic diagram of the dorsal structure of the back rest board in the embodiments of the present invention.

[0038] Among them, 1. Head support; 2. Chest and back support; 3. Head rest board; 4. Head support base plate; 5. Back rest board; 6. Chest and back support base plate; 7. Head support rotating shaft; 8. Chest and back support rotating shaft; 9. Left first pipe fitting; 10. Right first pipe fitting; 11. Left second pipe fitting; 12. Right second pipe fitting; 13. Protractor one; 14. Protractor two; 15. First support plate; 16. Second support plate; 17. First card slot; 18. Second card slot; 19. Head fixator; 20. Chest fixator; 21. Head gasket; 22. Back gasket; 23. First groove; 24. Second groove; 25. First fixing device; 26. Second fixing device; 27. Threaded part; 28. Locking nut; 29. First connecting shaft; 30. Second connecting shaft; 31. First locking knob; 32. Second locking knob. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] The object of the present invention is to provide a fixator for adjusting the neck flexion angle of a patient with Hirayama disease in magnetic resonance imaging, so as to solve the problems existing in the above-mentioned prior art, and at the same time adjust the bending angles of the head and the chest and back of the patient with Hirayama disease, so that the patient with Hirayama disease can perform magnetic resonance examination in the optimal cervical magnetic resonance flexion position and obtain accurate examination results.

[0041] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] As Figures 1-3 shown, the present invention provides a fixator for adjusting the neck flexion angle of a patient with Hirayama disease in magnetic resonance imaging, which includes a head bracket and a chest and back bracket;

[0043] The head bracket 1 includes a head backrest 3, a head bracket bottom plate 4 and a head bracket rotating shaft 7. The head bracket bottom plate 4 is provided with a first docking member. The head backrest 3 is rotatably mounted on the head bracket bottom plate 4 through the head bracket rotating shaft 7. The head bracket 1 further includes a first positioning device for fixing the rotation position of the head backrest 3. One end of the head bracket 1 for docking and cooperating with the chest and back bracket bottom plate 6 is provided with a first docking member;

[0044] The chest and back bracket includes a backrest 5, a chest and back bracket bottom plate 6 and a chest and back bracket rotating shaft 8. The chest and back bracket bottom plate 6 is provided with a second connecting member. The back bracket is rotatably mounted on the chest and back bracket bottom plate 6 through the chest and back bracket rotating shaft 8. The chest and back bracket further includes a second positioning device for fixing the rotation position of the backrest 5. One end of the chest and back bracket bottom plate 6 for docking and cooperating with the head bracket bottom plate 4 is provided with a second docking member capable of being connected to the first docking member. The head bracket 1 and the chest and back bracket are connected through the first docking member and the second docking member. As a preferred solution, the distance between the head bracket 1 and the chest and back bracket is adjustable to meet the needs of patients of different heights.

[0045] As Figure 1 shown, in one embodiment, the head bracket 1 further includes a head fixing assembly. The head fixing assembly includes a head gasket 21 and a head fixator 19. The head gasket 21 is disposed on the surface of the head backrest 3 and is used to support the head of the patient. The position of the leg of the head fixing assembly corresponds to that of the head gasket 21 and is used to fix the forehead of the patient.

[0046] In one embodiment, the head gasket 21 is a flexible gasket and is installed in the first groove 23 on the headrest plate 3. The head fixator 19 is a strap, and the head fixator 19 is used to tie the patient's head and the headrest plate 3 together. The flexible gasket can reduce the discomfort of the patient when being fixed. Specifically, the flexible gasket can be made of rubber material. The head fixator 19 being a strap can adapt to different head shapes. The strap can be fixed by using Velcro or can be fixed by winding a nylon cloth belt. Both the head gasket 21 and the head fixator 19 are flexible structures, which can minimize the discomfort of the patient's head caused by fixation, eliminate the struggling of the patient due to discomfort, and keep the patient's neck at the best neck flexion angle.

[0047] As Figures 1-3 shown, in one embodiment, a handle is provided at one end of the headrest plate 3 away from the headrest bracket rotating shaft 7 to facilitate the staff to adjust the rotation angle of the headrest 1. The first positioning device includes:

[0048] A first card slot 17 is provided on either the bottom surface of the headrest plate 3 or the top surface of the headrest bracket bottom plate 4;

[0049] A first support plate 15, the first end of the first support plate 15 is hinged to the other of the bottom surface of the headrest plate 3 and the top surface of the headrest bracket bottom plate 4, the second end of the 15 is used to be clamped in the card slot, the first end of the first support plate 15 is hinged on a first connecting shaft 29, and a first locking knob 31 is provided at one end of the first connecting shaft 29.

[0050] As Figure 1 shown, in a preferred embodiment, the first support plate 15 can slide in the first card slot group 17 to achieve continuous and precise adjustment of the flipping angle of the headrest plate 3. The first locking knob 31 is used to lock the first connecting shaft 29 to achieve stable support for the patient's head.

[0051] As Figure 1 shown, in one embodiment, the chest and back bracket further includes a chest and back fixing assembly. The chest and back fixing assembly includes a back gasket 22 and a chest fixator 20. The back gasket 22 is arranged on the surface of the backrest plate 5 and is used to support the patient's back. The position of the chest fixing assembly corresponds to that of the back gasket 22 and is used to fix the patient's chest and upper limbs.

[0052] In one embodiment, the back gasket 22 is a flexible gasket and is installed in the second groove 24 of the backrest plate 5. The chest fixator 20 is a strap. The chest fixator 20 binds the patient's chest and upper limbs to the backrest plate 5. The flexible gasket can reduce the discomfort of the patient when being fixed. Specifically, the flexible gasket can be made of rubber material. The chest fixator 20 being a strap can adapt to different chest and upper limb shapes. The strap can be fixed by using Velcro or can be fixed by winding a nylon cloth belt. Both the back gasket 22 and the chest fixator 20 are flexible structures, which can minimize the discomfort of the patient's chest and back caused by fixation, eliminate the patient's struggle due to discomfort, and keep the patient's neck at the best neck flexion angle.

[0053] As Figure 1 and 3 shown, in one embodiment, a handle is provided at one end of the backrest plate 5 away from the chest and back support rotating shaft 8 to facilitate the staff to adjust the rotation angle of the backrest plate 5. The second positioning device includes:

[0054] A second card slot group 18 is provided on one of the bottom surface of the backrest plate 5 or the top surface of the chest and back support bottom plate 6;

[0055] A second support plate 16. The first section of the second support plate 16 is hinged to the other of the bottom surface of the backrest plate 5 and the top surface of the chest and back support bottom plate 6. The second end of the second support plate 16 is used to be clamped in the card slot. The first end of the second support plate 16 is hinged on a second connecting shaft 30. A second locking knob 32 is provided at one end of the second connecting shaft 30;

[0056] As Figure 1 shown, in a preferred embodiment, the second support plate 16 can slide in the second card slot group 18 to achieve continuous and precise adjustment of the flipping angle of the backrest plate 5. The second locking knob 32 is used to lock the second connecting shaft 30 to achieve stable support for the patient's chest and back.

[0057] As Figure 1 、 2As shown in FIGS. 3, in one embodiment, one end of the head support rotating shaft 7 is connected to the edge of the head support bottom plate 4. A first protractor 13 is installed at the connection position between the head support rotating shaft 7 and the head support bottom plate 4. The first protractor 13 is perpendicular to the head support bottom plate 4. One end of the chest and back support rotating shaft 8 is connected to the edge of the chest and back support bottom plate 6. A second protractor 14 is installed at the connection position between the chest and back support rotating shaft 8 and the chest and back support bottom plate 6. The second protractor 14 is perpendicular to the chest and back support bottom plate 6. The sum of the measurement data of the first protractor 13 and the second protractor 14 is the actual neck flexion angle of the patient.

[0058] As Figure 1 shown, in one embodiment, the first docking member includes a left first pipe fitting 9 and a right first pipe fitting 10. The second docking member includes the left second pipe fitting 11 and the right second pipe fitting 12. The left first pipe fitting 9 and the left second pipe fitting 11 are inserted and connected. The right first pipe fitting 10 and the right second pipe fitting 12 are inserted and connected. The lengths of the left first pipe fitting 9, the right first pipe fitting 10 and / or the left second pipe fitting 11 and the right second pipe fitting 12 are adjustable. A threaded portion 26 is provided on the left first pipe fitting 9 and / or the right first pipe fitting 10. A locking nut 27 adapted to the threaded portion 26 is provided on the left second pipe fitting 11 and / or the right second pipe fitting 12.

[0059] As Figure 1 shown, in one embodiment, a first fixing device 25 is provided on the bottom surface of the head support bottom plate 4. A second fixing device 26 is provided on the bottom surface of the chest and back support bottom plate 6. The first fixing device 25 and the second fixing device 26 can be at least one suction cup. As Figure 2 shown, in a preferred embodiment, the number of both the first fixing device 25 and the second fixing device 26 is 4.

[0060] In use, the head support 1 cooperates with the chest and back support 2. The first docking member on the head support 1 is docked with the second docking member on the chest and back support 2. After docking, the device is placed on the examination table of the examination equipment. The device is stably installed on the examination table of the nuclear magnetic resonance machine through the first fixing device 25 and the second fixing device 26. The patient lies flat on the examination table. The patient's head is aligned with the head gasket 21 and fits against the headrest 3. The patient's back is against the back gasket 22 and fits against the backrest 5. Then, the rotation angles of the headrest 3 and the backrest 5 are adjusted. According to the values measured by the protractor one 13 and the protractor two 14, it is judged whether the patient's neck has reached the optimal neck flexion angle. When the neck flexion angle of the patient reaches the optimal, stop rotating the headrest 3 and the backrest 5. After the adjustment is completed, fix the rotation position of the headrest 3 through the first positioning device, and fix the rotation position of the backrest 5 through the second positioning device. Then, fix the patient's head with the head fixator 19, and fix the patient's chest and upper limbs with the chest fixator 20. Then, the examination table enters the nuclear magnetic resonance machine to examine the patient.

[0061] In the case of using a single support, place the head support (chest and back support) on the examination table of the examination equipment. The device is stably installed on the examination table of the nuclear magnetic resonance machine through the first fixing device 24 or (the second fixing device 23). The patient lies flat on the examination table. The patient's head is aligned with the head rubber pad 19 and fits against the headrest 3 (the patient's back is against the back rubber pad 20 and fits against the backrest 5). Then, adjust the rotation angle of the headrest 3 (the backrest 5). According to the values measured by the protractor one 13 (the protractor two 14), it is judged whether the patient's neck has reached the optimal neck flexion angle. When the neck flexion angle of the patient reaches the optimal, stop rotating the headrest 3 (the backrest 5). After the adjustment is completed, fix the rotation position of the headrest 3 through the first positioning device (fix the rotation position of the backrest 5 through the second positioning device). Then, fix the patient's head with the head fixator 17 (fix the patient's chest and upper limbs with the chest fixator 18). Then, the examination table enters the nuclear magnetic resonance machine to examine the patient.

[0062] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A fixator for adjusting the neck flexion angle of magnetic resonance imaging in patients with Hirayama disease, characterized in that: It includes a head support and a chest and back support; The head support includes a head rest board, a head support bottom board and a head support rotating shaft. The head rest board is rotatably installed on the head support bottom board through the head support rotating shaft. The head support further includes a first positioning device for fixing the rotating position of the head rest board. One end of the head support for docking and mating with the chest and back support bottom board is provided with a first docking member; The chest and back support includes a back rest board, a chest and back support bottom board and a chest and back support rotating shaft. The back support is rotatably installed on the chest and back support bottom board through the chest and back support rotating shaft. The chest and back support further includes a second positioning device for fixing the rotating position of the back rest board. One end of the chest and back support bottom board for docking and mating is provided with a second docking member capable of being connected to the first docking member.

2. The fixator for adjustable neck flexion angle according to claim 1, wherein: The head support further includes a head fixing assembly, and the head fixing assembly includes a head gasket and a head fixator. The head gasket is arranged on the surface of the head rest board and is used for supporting the patient's head. The position of the leg of the head fixing assembly corresponds to that of the head gasket and is used for fixing the patient's forehead.

3. The fixator with adjustable neck flexion angle according to claim 2, characterized in that: The head gasket is a flexible gasket and is installed in a first groove on the head rest board. The head fixator is a strap, and the head fixator is used for fixing the patient's head and the head rest board together.

4. The fixator for adjusting the neck flexion angle according to claim 1, wherein: A handle is arranged at one end of the head rest board away from the head support rotating shaft. The first positioning device includes: A first card slot, which is arranged on one of the bottom surface of the head rest board or the top surface of the head support bottom board; A first support plate. The first end of the first support plate is hinged to the other of the bottom surface of the head rest board and the top surface of the head support bottom board. The second end of the first support plate is used for being clamped in the first card slot. The first end of the first support plate is hinged on a first connecting shaft, and a first locking knob is arranged at one end of the first connecting shaft.

5. The fixator for adjustable neck flexion angle according to claim 1, characterized in that: The chest and back support further includes a chest and back fixing assembly. The chest and back fixing assembly includes a back gasket and a chest fixator. The back gasket is arranged on the surface of the back rest board and is used for supporting the patient's back. The position of the chest fixing assembly corresponds to that of the back gasket and is used for fixing the patient's chest and upper limbs.

6. The fixator with adjustable neck flexion angle according to claim 5, characterized in that: The back gasket is a flexible gasket and is installed in a second groove on the back rest board. The chest fixator is a strap, and the chest fixator fixes the patient's chest, upper limbs and the back rest board together.

7. The fixator with adjustable neck flexion angle according to claim 4, characterized in that: A handle is arranged at one end of the back rest board away from the chest and back support rotating shaft. The second positioning device includes: A second card slot, which is arranged on one of the bottom surface of the back rest board or the top surface of the back support bottom board; A second support plate. The first end of the second support plate is hinged to the other of the bottom surface of the back rest board and the top surface of the back support bottom board. The second end of the second support plate is used for being clamped in the card slot. The first end of the second support plate is hinged on a second connecting shaft, and a second locking knob is arranged at one end of the second connecting shaft.

8. The fixator for adjustable neck flexion angle according to claim 1, wherein: One end of the head support rotating shaft is connected to the edge of the head support bottom plate. A protractor one is installed at the connection position between the head support rotating shaft and the head support bottom plate. The protractor one is perpendicular to the head support bottom plate. One end of the chest and back support rotating shaft is connected to the edge of the chest and back support bottom plate. A protractor two is installed at the connection position between the chest and back support rotating shaft and the chest and back support bottom plate. The protractor two is perpendicular to the chest and back support bottom plate.

9. The fixator with adjustable neck flexion angle according to claim 1, characterized in that: The first docking member includes two first pipe fittings. The second docking member includes two second pipe fittings corresponding to the first pipe fittings. The first pipe fittings and the second pipe fittings can be inserted and connected. The lengths of the first pipe fittings and / or the second pipe fittings are adjustable. A locking nut is sleeved on one of the first pipe fittings or the second pipe fittings, and a thread portion adapted to the locking nut is provided on the other one.

10. The fixator with adjustable neck flexion angle according to claim 1, characterized in that: A first fixing device is provided on the bottom surface of the head support bottom plate. A second fixing device is provided on the bottom surface of the chest and back support bottom plate.

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