Head and upper limb fixing frame for neurosurgery lateral decubitus position

Abstract

The utility model provides a kind of neurosurgery operation side prone position special head upper limb fixing frame, including head frame, upper limb bracket and the connecting rod assembly connecting two, head frame is fixed on operating table for fixing patient head, the surface profile of upper limb bracket adapts the physiological curve of human upper arm, elbow and wrist joint. Connecting rod assembly realizes the flexible connection of multiple connecting rods by rotatable connecting structure, so that upper limb bracket can be positioned in multi-degree-of-freedom space, and linkage when head frame position is adjusted. Since the fixing frame can realize the synchronous adjustment of head and upper limb, the upper limb pulling and compression caused by body position change are avoided;Its physiological curve adaptation design can evenly disperse pressure, reduce the risk of nerve injury and poor blood circulation;Multi-degree-of-freedom adjusting mechanism can accurately adapt to the size of different patients and operation posture requirements, significantly improve the stability, safety and comfort of fixed equipment in side prone position operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a head and upper limb fixation frame for the prone position in neurosurgery. Background Technology

[0002] In neurosurgical procedures, the lateral decubitus position is commonly used for treating intracranial lesions such as those at the skull base, posterior fossa, and cerebellopontine angle, providing the surgeon with a clear field of vision and precise manipulation capabilities. However, neurosurgical procedures are complex and often last 8-10 hours or more. After general anesthesia, patients lose their ability to move independently, making stable fixation and comfortable support of the head and upper limbs crucial for surgical safety and postoperative recovery.

[0003] Current lateral decubitus surgical fixation equipment has significant shortcomings: it only provides an independent head fixation bracket (allowing for three-point fixation of the forehead and back of the head), lacking an upper limb fixation device that works in conjunction with the head fixation bracket. Clinically, upper limb fixation often relies on temporary support structures (such as bedside wooden boards with hanging ropes for support, or V-shaped frames for suspension), which presents three major problems: First, the upper limb fixation has poor stability, lacks a precise adjustment mechanism, and is difficult to adapt to the patient's body shape and surgical needs. It is easily affected by bed movement and surgeon displacement, affecting the continuity of the surgery and causing upper limb compression. Second, the head and upper limb cannot be adjusted synchronously. Neurosurgical operating tables are mostly three-piece foldable designs, making it difficult to adapt the upper limb posture when adjusting the head, easily causing upper limb traction and twisting, and aggravating tissue compression. Third, it affects upper limb blood circulation and infusion safety. Long-term non-physiological fixation leads to poor blood circulation. Coupled with the need for intravenous infusion and blood transfusion in the upper limb during surgery, it may cause complications such as limb swelling and nerve damage, which can be life-threatening in extreme cases.

[0004] To address these issues, several improved solutions for head and upper limb fixation have emerged in the industry. For example, the Chinese utility model patent application number 202420704674.9 (authorization announcement number CN222399362U) discloses an "integrated hand support," which uses a fixing component, an adjusting component, and a Mayfield head frame to fix the patient's head. It also provides a hand rest, upper arm support, and forearm support for the upper limb. Furthermore, it adjusts the upper limb support angle through the meshing of a ball bearing and a fixed gear, thus solving the problem of coordinated head and upper limb fixation.

[0005] However, this structure still has some shortcomings: First, the upper limb fixation relies on Velcro restraint, which can only achieve overall angle adjustment of the upper arm and forearm, and cannot meet the independent and precise posture adaptation needs of joints such as the elbow and wrist. It is difficult to adapt to the limb shape of different patients and the fine requirements of surgical operation for limb posture. Second, it has not been specifically optimized for the comfort and blood circulation guarantee of long-term surgery. The upper limb support part lacks flexible adaptation design, and long-term fixation still poses a risk of local pressure leading to poor blood circulation, which cannot fully guarantee the safety and comfort of the patient's upper limb during long-term surgery.

[0006] Therefore, based on existing head and upper limb fixation frames, how to achieve efficient integration and linkage between the head and upper limbs, improve the precision and flexibility of joint adjustment, ensure the comfort and smooth blood circulation of the patient's upper limbs during long-term surgery, and adapt to the folding and adjustment characteristics of the operating table to meet the high requirements of stability, adaptability and safety of fixation equipment in neurosurgical lateral prone position surgery has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a special head and upper limb fixation frame for neurosurgical lateral prone position that can achieve synchronous adjustment of the head and upper limb and precise fitting of upper limb joints to ensure patient comfort and safety, in light of the above-mentioned technical status.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a special head and upper limb fixation frame for lateral prone position in neurosurgery, including...

[0009] A headrest, placed on the operating table, is used to fix the patient's head.

[0010] An upper limb support brace, used to support a patient's upper limb, has a support surface contour that conforms to the physiological curves of the upper arm, elbow joint, and wrist joint; and

[0011] A linkage assembly is connected between the head frame and the upper limb support, enabling the upper limb support to adjust in tandem with the adjustment of the head frame's position.

[0012] The linkage assembly includes multiple linkages, and adjacent linkages are connected by a rotatable connection structure;

[0013] One of the connecting rods is connected to the head frame, and the other connecting rod is connected to the upper limb support. By adjusting the rotatable connection structure, the upper limb support can be positioned and fixed relative to the head frame in a multi-degree-of-freedom space.

[0014] In order to enable the rotatable connection structure to have both flexible adjustment and stable locking functions, and to ensure that the upper limb support can be reliably fixed after multi-degree-of-freedom adjustment, preferably, the rotatable connection structure includes at least one universal joint with a self-locking function.

[0015] To optimize the overall structure of the linkage assembly and further improve the flexibility and reliability of the upper limb support adjustment, preferably, the linkage assembly includes a first link, a second link, and a third link. The end of the first link away from the second link is connected to the head frame, and the end of the third link away from the second link is connected to the upper limb support. The first link and the second link, as well as the third link and the upper limb support, are connected via universal joints with a self-locking function.

[0016] To prevent the upper limb support from falling or shifting due to insufficient load-bearing capacity of the universal joint, and to ensure the safety and stability of the upper limb fixation, preferably, the universal joint is configured such that the minimum driving force required to drive the universal joint to rotate is greater than the weight of the patient's upper limb.

[0017] To enrich the adjustment options of the rotatable connection structure, precise adjustment and stable locking of the angle between the second and third links can be achieved through the coaxial rotation of the docking plate and the clamping and fixing of the locking handle. Preferably, the rotatable connection structure further includes a first docking plate, a second docking plate, and a first locking handle. The first docking plate is fixed to the end of the second link away from the first link, and the second docking plate is fixed to the end of the third link away from the upper limb support. The first and second docking plates are coaxially connected and can rotate relative to each other. By tightening the first locking handle, the first and second docking plates, after their relative positions have been adjusted, can be clamped and fixed.

[0018] To achieve precise adjustment and stable locking of the angle between the first link and the headframe, and to improve the accuracy of angle adjustment and the reliability of locking, preferably, a third mating plate is provided at the end of the first link away from the second link, and a fourth mating plate is provided on the headframe, coaxially corresponding to the third mating plate. The surfaces of the third and fourth mating plates opposite each other are provided with teeth evenly spaced circumferentially. The third and fourth mating plates are connected by a second locking handle. Operating the second locking handle allows selective engagement or disengagement of the teeth on the third and fourth mating plates to adjust and lock the relative angle between the first link and the headframe.

[0019] In order to achieve independent adaptation of the upper limb support to the patient's elbow and wrist joint posture, the segmented hinge structure allows each support segment to rotate relative to each other to meet the different limb shapes and surgical needs of patients. Preferably, the upper limb support includes an upper arm support segment, an elbow joint support segment and a wrist joint support segment that are hinged in sequence. Adjacent support segments can rotate relative to each other to adapt to the posture adjustment of the patient's elbow and wrist joints.

[0020] To improve the comfort of the patient's upper limb in contact with the support and reduce local pressure caused by prolonged support, a flexible buffer layer is used to achieve uniform pressure distribution. Preferably, the support surface of the upper limb support is provided with a flexible buffer layer.

[0021] To accurately control the relative rotation angle of adjacent support segments and improve the accuracy and repeatability of posture adjustment, preferably, a first scale is provided at the hinge point of the upper arm support segment and the elbow joint support segment. The first scale is fixed to the hinge end of the upper arm support segment, and its surface has a first scale evenly spaced along the circumference. The elbow joint support segment has a first pointer pointing to the first scale. A second scale is provided at the hinge point of the elbow joint support segment and the wrist joint support segment. The second scale is fixed to the hinge end of the elbow joint support segment, and its surface has a second scale evenly spaced along the circumference. The wrist joint support segment has a second pointer pointing to the second scale. The first scale and the first pointer, and the second scale and the second pointer, are respectively used to indicate the relative rotation angle of the corresponding adjacent support segments.

[0022] To ensure the headrest is securely installed and positioned on the operating table, and to guarantee that the headrest is installed accurately and is not easily displaced, a fixing frame is preferably included. The fixing frame is located at the bottom of the head end of the operating table, and the bottom of the fixing frame has at least two insertion holes for the fixing rods of the headrest to be inserted and locked.

[0023] Compared with existing technologies, the advantages of this invention are as follows: By setting a head frame on the operating table and matching it with an upper limb support whose supporting surface adapts to the physiological curve of the human upper limb, and by using a linkage assembly with a rotatable connecting structure to connect the two into a linked whole, the upper limb support can be adjusted synchronously with the head frame due to the multi-degree-of-freedom adjustment of the linkage assembly. This avoids the problems of easy displacement of the upper limb during temporary setup and traction and compression caused by asynchronous head and limb adjustments in the prior art, thus ensuring the continuity of the surgery. At the same time, the support design of the upper limb support conforming to the curve of the human body does not rely on single constraints such as Velcro, which can reduce local pressure concentration, reduce the risk of poor blood circulation and nerve damage caused by prolonged surgery, and improve the patient's safety during surgery. In addition, the multi-degree-of-freedom adjustment function can flexibly adapt to the elbow and wrist joint postures according to the patient's body shape and surgical needs, solving the defects of existing solutions that can only be adjusted as a whole and cannot accurately adapt to the joints, thus meeting the high requirements of neurosurgical fixation equipment. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0025] Figure 2 This is a schematic diagram of the fixture installed on the operating table in this embodiment;

[0026] Figure 3 This is a schematic diagram of the decomposed state structure of this embodiment;

[0027] Figure 4 This is a schematic diagram of the cooperation structure between the linkage assembly and the upper limb bracket in this embodiment;

[0028] Figure 5 This is a schematic diagram of the disassembled structure of the upper limb support in this embodiment;

[0029] Figure 6 for Figure 5 An enlarged schematic diagram of the structure of part B. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] Figures 1-6 The diagram shows the preferred embodiment of this utility model. The head and upper limb fixation frame for neurosurgical lateral prone position mainly includes a head frame 1, an upper limb support 2, a linkage assembly 3, a rotatable connection structure 4, and a fixation frame 5. Through the linkage structure of the "head frame-linkage assembly-upper limb support," combined with the multi-degree-of-freedom adjustment of the rotatable connection, the support design conforming to the physiological curve of the human body, and precise angle indication, it effectively solves the problems of poor stability of the upper limb relying on temporary structures, asynchronous head and limb adjustments, and insufficient joint adaptation precision in existing technologies. Simultaneously, it ensures intraoperative comfort and safety, meeting the high requirements of neurosurgical lateral prone position fixation equipment.

[0032] The structure and connection relationship of each component in this embodiment are as follows:

[0033] Headframe 1: Reference Figures 1 to 3As shown, the head frame 1 is the core component for head fixation in this embodiment. It adopts a stable structure that meets the standards of neurosurgical surgery, which can reliably fix the patient's head. The head frame here is existing technology and will not be described in detail here. The head frame 1 has a fourth docking plate 1a on the side near the connecting rod assembly 3. The surface of the fourth docking plate 1a has teeth that are evenly spaced along the circumference, and the center of the plate has a connection hole that is adapted to the second locking handle 1b. The second locking handle 1b is assembled with the fourth docking plate 1a through the connection hole to adjust the relative angle between the head frame 1 and the connecting rod assembly 3. At the same time, the bottom of the head frame 1 has a fixing rod 1c for cooperating with the fixing frame 5, providing a stable installation base for the head frame 1.

[0034] Upper limb brace 2: Reference Figures 1 to 5 As shown, the upper limb support 2 is the core component of the upper limb support, including an upper arm support section 2a, an elbow joint support section 2b, and a wrist joint support section 2c that are hinged sequentially. The overall support surface contour of the three support sections is adapted to the physiological curves of the upper arm, elbow joint, and wrist joint of the human upper limb. The support surface of the upper limb support 2 is provided with a flexible buffer layer 2d to improve the patient's contact comfort. It can also be used with straps to stably fix the patient's upper limb on the upper limb support 2. A first scale 2a1 is provided on the upper arm support section 2a and near the hinge end of the elbow joint support section 2b. The surface of the first scale 2a1 is engraved with evenly spaced markings along the circumference. The elbow joint support section 2b has a first scale evenly arranged; a first pointer 2b1 is provided at the end of the elbow joint support section 2b near the upper arm support section 2a, and the tip of the first pointer 2b1 points to the scale of the first scale 2a1. At the same time, a second scale 2b2 is provided at the hinge end of the elbow joint support section 2b near the wrist joint support section 2c, and the surface of the second scale 2b2 is engraved with a second scale evenly arranged along the circumference; a second pointer 2c1 is also provided on the wrist joint support section 2c near the end of the elbow joint support section 2b, and the tip of the second pointer 2c1 points to the scale of the second scale 2b2. The angle can be visually adjusted by the cooperation of the scale and the pointer.

[0035] Linkage assembly 3: Reference Figures 3 to 5 As shown, the linkage assembly 3 is the core component connecting the head frame 1 and the upper limb support 2, including a first linkage 3a, a second linkage 3b, and a third linkage 3c; the end of the first linkage 3a away from the second linkage 3b is provided with a third mating plate 3a1, which is structurally adapted to the fourth mating plate 1a of the head frame 1, and its opposite plate surface is also provided with teeth, which can engage or disengage with the teeth of the fourth mating plate 1a; both ends of the second linkage 3b and the third linkage 3c are provided with mounting structures for cooperating with the rotatable connection structure 4 to ensure stable connection with other components.

[0036] Rotatable connection structure 4: Reference Figures 3 to 5As shown, the rotatable connection structure 4 includes a universal joint 4a, a first docking plate 4b, a second docking plate 4c, and a first locking handle 4d. The universal joint 4a has a self-locking function, which can realize flexible connection and locking between the first link 3a and the second link 3b, and between the third link 3c and the upper limb bracket 2. It should be noted that the universal joint 4a is configured such that the minimum driving force required to drive the universal joint 4a to rotate is greater than the weight of the patient's upper limb, so as to prevent instability after the upper limb bracket 2 is fixed. The first docking plate 4b is located at the end of the second link 3b away from the first link 3a, and the second docking plate 4c is located at the end of the third link 3c away from the upper limb bracket 2. The two are coaxially connected and can rotate relative to each other. The first locking handle 4d cooperates with the first docking plate 4b and the second docking plate 4c. By tightening or loosening, the two docking plates can be pressed and fixed or their angle adjusted.

[0037] Mounting bracket 5: Reference Figures 1 to 3 As shown, the fixing frame 5 is located at the bottom of the head end of the operating table A, providing installation support for the head frame 1; the bottom of the fixing frame 5 has at least two insertion holes 5a, which are adapted to the structure of the fixing rod 1c of the head frame 1. The fixing rod 1c of the head frame 1 can be inserted into the insertion hole 5a and locked to ensure the head frame 1 is stably installed on the operating table A.

[0038] Spatial relationship: Reference Figures 1 to 3 As shown, the head frame 1 is installed in the head area of ​​the operating table via the fixing frame 5. The linkage assembly 3 connects the head frame 1 and the upper limb support 2, so that the upper limb support 2 is located in the area below the patient's upper limb. The upper arm support section 2a, elbow joint support section 2b, and wrist joint support section 2c of the upper limb support 2 are distributed sequentially along the extension direction of the upper limb to ensure that each support section fits precisely with the corresponding part of the upper limb. The rotatable connection structure 4 is located between the links of the linkage assembly 3 and between the links and the upper limb support 2, respectively, to ensure the flexibility of adjustment and the reliability of linkage.

[0039] The working principle of the head and upper limb fixation frame for the lateral prone position in neurosurgery described in this embodiment is as follows:

[0040] 1. Equipment Installation and Initial Positioning: Fix the fixing frame 5 to the bottom of the head end of the operating table A. Insert the fixing rod 1c of the head frame 1 into the corresponding insertion hole 5a of the fixing frame 5 and lock it to complete the initial installation of the head frame 1. According to the patient's surgical position requirements, loosen the second locking handle 1b and adjust the relative angle between the third docking plate 3a1 of the first connecting rod 3a and the fourth docking plate 1a of the head frame 1 so that the connecting rod assembly 3 extends towards the patient's upper limb. After adjusting to the appropriate position, tighten the second locking handle 1b to lock the teeth of the two docking plates and fix the relative angle between the first connecting rod 3a and the head frame 1.

[0041] 2. Upper limb support posture adjustment: Push the second link 3b and the third link 3c to overcome the maximum locking force of the universal joint 4a, moving the upper limb support 2 to below the patient's upper limb. Adjust the height and fore-aft position of the upper limb support 2 so that the supporting surface of the upper limb support 2 initially fits against the patient's upper limb. If fine adjustment of the angle of the upper limb support 2 is required, loosen the first locking handle 4d, rotate the second docking plate 4c to rotate the third link 3c and the upper limb support 2, and after adjusting to the precise position, tighten the first locking handle 4d to move the first... The first docking plate 4b and the second docking plate 4c are pressed and fixed together. Then, according to the physiological posture of the patient's elbow and wrist joints, the hinge between the elbow joint support section 2b and the upper arm support section 2a is rotated, and the first scale of the first scale 2a1 is read through the first pointer 2b1 to determine the elbow joint adaptation angle. The hinge between the wrist joint support section 2c and the elbow joint support section 2b is rotated, and the second scale of the second scale 2b2 is read through the second pointer 2c1 to determine the wrist joint adaptation angle, thus completing the posture adjustment of the upper limb support 2.

[0042] 3. Intraoperative Synchronous Linkage and Stable Fixation: During the operation, if the position of the head frame 1 needs to be adjusted (such as lifting, moving forward or backward), the head end of the operating table A will be adjusted accordingly. The head frame 1 will drive the first connecting rod 3a to move synchronously through the fixing frame 5. The connecting rod assembly 3, through the flexible connection of the universal joint 4a and the cooperation of the first docking plate 4b and the second docking plate 4c, enables the second connecting rod 3b and the third connecting rod 3c to drive the upper limb support 2 to adjust synchronously with the head frame 1, avoiding traction or torsion of the upper limb. At the same time, the self-locking function of the universal joint 4a, the locking state of the first docking plate 4b and the second docking plate 4c, and the stable cooperation of each hinge of the upper limb support 2 ensure that the upper limb support 2 always maintains the preset posture and will not shift due to the movement of the bed or the surgeon's operation, ensuring the smooth progress of the operation.

[0043] It should be noted that in the description of this embodiment, the terms "upper," "lower," "front," "rear," "horizontal," "vertical," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "installation," "connection," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A head and upper limb fixation frame specifically designed for the lateral prone position in neurosurgery, characterized in that... include: A head frame (1) is placed on the operating table (A) and used to fix the patient's head; Upper limb support (2) is used to support the patient's upper limb. The contour of its support surface is adapted to the physiological curve of the upper arm, elbow joint and wrist joint of the human upper limb. as well as The linkage assembly (3) is connected between the head frame (1) and the upper limb support (2), enabling the upper limb support (2) to be adjusted in conjunction with the position of the head frame (1) when the position is adjusted. The linkage assembly (3) includes multiple linkages, and adjacent linkages are connected by a rotatable connection structure (4); One of the connecting rods is connected to the head frame (1), and the other connecting rod is connected to the upper limb bracket (2). By adjusting the rotatable connecting structure (4), the upper limb bracket (2) can be positioned and fixed relative to the head frame (1) in a multi-degree-of-freedom space.

2. The head and upper limb fixation frame for lateral prone position in neurosurgery according to claim 1, characterized in that: The rotatable connection structure (4) includes at least one universal joint (4a) with a self-locking function.

3. The head and upper limb fixation frame for the prone position in neurosurgery according to claim 2, characterized in that: The linkage assembly (3) includes a first link (3a), a second link (3b) and a third link (3c). The end of the first link (3a) away from the second link (3b) is connected to the head frame (1), and the end of the third link (3c) away from the second link (3b) is connected to the upper limb support (2). The first link (3a) and the second link (3b), and the third link (3c) and the upper limb bracket (2) are connected by the universal joint (4a) with a self-locking function.

4. The head and upper limb fixation frame for lateral prone position in neurosurgery according to claim 2, characterized in that: The universal joint (4a) is configured such that the minimum driving force required to drive the universal joint (4a) to rotate is greater than the weight of the patient's upper limb.

5. The head and upper limb fixation frame for the prone position in neurosurgery according to claim 3, characterized in that: The rotatable connection structure (4) further includes a first docking plate (4b), a second docking plate (4c), and a first locking handle (4d); The first docking plate (4b) is fixed to the end of the second connecting rod (3b) away from the first connecting rod (3a), and the second docking plate (4c) is fixed to the end of the third connecting rod (3c) away from the upper limb bracket (2). The first docking plate (4b) and the second docking plate (4c) are coaxially connected and can rotate relative to each other. By tightening the first locking handle (4d), the first docking plate (4b) and the second docking plate (4c) after their relative positions have been adjusted can be pressed and fixed together.

6. The head and upper limb fixation frame for lateral prone position in neurosurgery according to claim 3, characterized in that: The end of the first connecting rod (3a) away from the second connecting rod (3b) is provided with a third docking plate (3a1), and the head frame (1) is provided with a fourth docking plate (1a) coaxial with the third docking plate (3a1). The third docking plate (3a1) and the fourth docking plate (1a) are both provided with teeth evenly arranged in the circumferential direction on their respective disk surfaces. The third docking plate (3a1) and the fourth docking plate (1a) are connected by a second locking handle (1b). By operating the second locking handle (1b), the teeth on the third docking plate (3a1) and the fourth docking plate (1a) can be selectively engaged or disengaged to adjust and lock the relative angle between the first connecting rod (3a) and the head frame (1).

7. The head and upper limb fixation frame for lateral prone position in neurosurgery according to any one of claims 1 to 6, characterized in that: The upper limb support (2) includes an upper arm support section (2a), an elbow joint support section (2b) and a wrist joint support section (2c) that are hinged in sequence. The adjacent support sections can rotate relative to each other to accommodate the patient's elbow and wrist joint posture adjustment.

8. The head and upper limb fixation frame for lateral prone position in neurosurgery according to claim 7, characterized in that: The upper limb support (2) has a flexible buffer layer (2d) on its supporting surface.

9. The head and upper limb fixation frame for lateral prone position in neurosurgery according to claim 7, characterized in that: A first scale (2a1) is provided at the hinge joint between the upper arm support section (2a) and the elbow joint support section (2b). The first scale (2a1) is fixed to the hinge end of the upper arm support section (2a). Its surface is provided with first scales evenly spaced along the circumference. A first pointer (2b1) pointing to the first scale is provided on the elbow joint support section (2b). A second scale (2b2) ​​is provided at the hinge of the elbow joint support section (2b) and the wrist joint support section (2c). The second scale (2b2) ​​is fixed to the hinge end of the elbow joint support section (2b). Its surface is provided with second scales evenly spaced along the circumference. A second pointer (2c1) pointing to the second scale is provided on the wrist joint support section (2c). The first dial (2a1) and the first pointer (2b1), and the second dial (2b2) ​​and the second pointer (2c1) are used to indicate the relative rotation angle of the corresponding adjacent support segments.

10. The head and upper limb fixation frame for lateral prone position in neurosurgery according to claim 1, characterized in that: It also includes a fixing frame (5), which is located at the bottom of the head end of the operating table (A). The bottom of the fixing frame (5) is provided with at least two insertion holes (5a), which are used for the corresponding insertion and locking of the fixing rod (1c) of the head frame (1).

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