Clinical head fixing device and communication system for oral and maxillofacial surgery

Abstract

The invention discloses a clinical head fixing device for oral and maxillofacial surgery and a communication system, and relates to the technical field of oral and maxillofacial nursing, the clinical head fixing device comprises a patient bed main body, the bottom of the patient bed main body is fixedly connected with a plurality of supporting legs, the top of the patient bed main body is fixedly connected with an outer side baffle, and two sides of the top of the patient bed main body are fixedly connected with outer side handrails; the adjusting mechanisms are arranged on the inner side wall, the top end and the bottom end of the patient bed body, each adjusting mechanism comprises a first screw rod, the first screw rods are connected to the inner side wall of the patient bed body in a two-thread mode, and the top of one first screw rod is fixedly connected with a connecting sliding block; by arranging the adjusting mechanism composed of the two first screw rods, the connecting sliding block and the headrest, and matching with the driving structure and the second screw rod used for adjusting the position of the single headrest, flexible and accurate adjustment of the head supporting height and the distance between the two headrests is achieved.

Description

Technical Field

[0001] This invention relates to the field of oral and maxillofacial care technology, specifically to a head fixation device and communication system for clinical use in oral and maxillofacial surgery. Background Technology

[0002] Oral and maxillofacial surgery is an important way to treat oral and maxillofacial diseases, especially complex reconstructive surgeries involving free flap transplantation. Postoperatively, patients often require a long period of strict bed rest for recovery. During this time, to ensure surgical success and the survival of the transplanted tissue, the patient's head usually needs to be strictly immobilized at a specific angle. For example, after free flap transplantation in maxillofacial surgery, the patient is often required to tilt their head to one side (e.g., 20 degrees to the right) for fixation. The core purpose is to protect the blood supply to the free flap and prevent traction or compression of the vascular anastomosis site due to head movement, which could lead to vasospasm, stenosis, or even thrombosis, thus ensuring the survival of the transplanted flap.

[0003] Specifically, the effects of head immobilization at a specific angle are mainly reflected in two aspects: Stabilizing the vascular anastomosis: During free flap transplantation, the donor and recipient vessels need to be precisely anastomosed, and the anastomosis is not fully healed in the early postoperative period. Fixing the head position effectively reduces traction and torsion of the neck and surrounding vessels, significantly reduces anastomotic tension, prevents anastomotic tearing or blood flow obstruction caused by head movement, and creates a stable environment for vascular endothelial healing. Ensuring local blood perfusion: Precise immobilization at a specific angle (e.g., 20 degrees to the right) helps avoid pressure on the transplanted area and surrounding tissues, maintaining the normal diameter and blood flow velocity of the vessels in that area, thereby providing a continuous and sufficient blood supply to the free flap. This is a key measure to prevent ischemia and necrosis of the free flap.

[0004] However, currently, the commonly used head immobilization methods in clinical practice mostly employ simple pillows and bandages for fixation, or use structurally fixed head pillows. These devices generally have the following problems: they cannot be precisely and flexibly adjusted according to the patient's individual head size, neck height, and required specific tilt angles (such as 20 degrees to the right or in the midline position); due to significant individual differences among patients, and the different immobilization angles required for different conditions, traditional fixation structures are difficult to adapt to the physiological curvature and medical orders of different patients, easily leading to neck suspension, local compression, or angle deviation; patients cannot actively maintain the set angle during prolonged immobilization, and once the head tilts beyond the safe range, the lack of real-time monitoring and early warning mechanisms may directly affect the blood supply to the free valve, increasing the risk of surgical failure.

[0005] To address these issues, those skilled in the art have proposed head fixation devices and communication systems for clinical use in oral and maxillofacial surgery. Summary of the Invention

[0006] The purpose of this invention is to provide a head fixation device and communication system for clinical use in oral and maxillofacial surgery, in order to solve the problems in the prior art where head fixation devices cannot flexibly adapt to individualized head shapes and neck heights of patients, and lack effective means of doctor-patient communication while the head is immobilized.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a head fixation device for clinical use in oral and maxillofacial surgery, comprising a patient bed body, wherein a plurality of support legs are fixedly connected to the bottom of the patient bed body, an outer baffle is fixedly connected to the top of the patient bed body, and outer railings are fixedly connected to both sides of the top of the patient bed body.

[0008] An adjustment mechanism is provided on the inner wall and top and bottom ends of the main body of the patient bed. The adjustment mechanism includes a first screw, which is connected to the inner wall of the main body of the patient bed by two threads. A connecting slider is fixedly connected to the top of one of the first screws, and a connecting slider is slidably connected to the top of the other first screw. A headrest is rotatably connected to the top of the two connecting sliders.

[0009] The bottom end of the first screw is provided with a driving structure for driving the first screw to work. The inner wall of one of the connecting sliders is threaded with a second screw for adjusting the position of one of the headrests. One end of the second screw is fixedly connected to a first handle, and the other end of the second screw is rotatably connected to the outside of the headrest.

[0010] Preferably, the drive structure includes two first connecting sprockets, which are respectively fixedly connected to the bottom ends of two first screws, and connecting chains are meshed on the outer side walls of the two first connecting sprockets.

[0011] Preferably, a second connecting sprocket is engaged with the inner wall of one end of the connecting chain, and a first threaded sleeve is fixedly connected to the outer wall of the patient bed body. A rotating handle is also threadedly connected to the inner wall of the first threaded sleeve.

[0012] Preferably, an adjustment mechanism is provided between the connecting slider and the headrest for adjusting the angle of the headrest. The adjustment mechanism includes two limiting slide plates, which are slidably connected to the inner wall of the connecting slider. The inner wall of the limiting slide plates is provided with multiple limiting slots. The headrest is equipped with an inclination sensor for detecting the angle of the patient's head offset.

[0013] Preferably, the inner walls of the plurality of limiting slots are engaged with limiting plates, the limiting plates are also slidably connected to the inner wall of the connecting slider, a support spring is fixedly connected between the limiting plates and the connecting slider for limiting the limiting plates, and a second handle is fixedly connected to the outer wall of the limiting plates.

[0014] Preferably, a limiting sleeve is engaged at the top of the outer railing, and a second threaded sleeve is fixedly connected to the outer wall of the limiting sleeve. A third screw is threadedly connected to the inner wall of the second threaded sleeve to limit the limiting sleeve. A third handle is fixedly connected to the outer wall of the third screw. An extension rod is fixedly connected to the other end of the limiting sleeve, and a display screen is installed on the outer side of the extension rod.

[0015] A head-fixed communication system for clinical use in oral and maxillofacial surgery includes a display screen, which further includes an intelligent interactive front end for collecting non-verbal interaction input from patients.

[0016] The core processing and AI engine communicate with the intelligent interactive front end to analyze the non-verbal interaction input, identify the patient's intentions and emotional state, and generate personalized responses and reassurance content.

[0017] The intelligent interactive front end includes at least:

[0018] The facial expression recognition interaction module is configured to capture the patient's facial expression data through an image sensor and recognize the facial expression data as specific communication commands.

[0019] A handwriting recognition module is configured to capture a patient's handwriting via a touch input device and recognize the handwriting as text information.

[0020] Preferably, the core processing and AI engine includes:

[0021] The multimodal input processing module is communicatively connected to the facial expression recognition interaction module and the handwriting recognition module. It is used to receive and integrate communication instructions recognized from facial expression data and text information recognized from handwriting to form a unified semantic input.

[0022] The Natural Language Processing (NLP) engine communicates with the multimodal input processing module to perform intent recognition and sentiment analysis on the unified semantic input in order to understand the patient's needs and emotions.

[0023] Preferably, the core processing and AI engine further includes: an intelligent knowledge base and a response engine, which are communicatively connected to the natural language processing (NLP) engine, for retrieving or dynamically generating corresponding answers, suggestions or entertainment content from the knowledge base based on the patient's intent;

[0024] The emotion analysis and soothing engine communicates with the natural language processing (NLP) engine and the intelligent knowledge base and response engine.

[0025] The emotion analysis and soothing engine is configured to: continuously track changes in the patient's emotional state based on the results of the emotion analysis; and proactively send instructions to the intelligent knowledge base and response engine when a preset negative emotion threshold is detected, in order to generate and push targeted emotion soothing content.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. This invention utilizes an angle adjustment mechanism comprised of a limiting slide plate, a limiting slot, and a limiting plate. This mechanism allows the headrest to be fixed in multiple preset positions, thereby precisely setting and stably maintaining the specific head immobilization angle required by the patient post-operatively (such as 20° to the right or in the center). This effectively solves the problems of rough angle adjustment and easy displacement associated with traditional fixation devices.

[0028] 2. The present invention uses a drive structure consisting of a sprocket and a chain, which allows medical staff to simultaneously drive the two first screws to rotate by turning a single rotary handle. This allows for a smooth and synchronous adjustment of the support height of the two headrests, making the operation extremely simple and labor-saving. It ensures stability and efficiency during the adjustment process and avoids the asymmetrical support problem that may occur with individual adjustments.

[0029] 3. This invention successfully integrates an advanced communication system with a physical restraint device by setting a limiting sleeve that can be easily installed on the outer railing of the hospital bed and fixing a display screen with an integrated intelligent interactive front end (facial expression recognition and manual writing module) onto it. This design allows patients to still communicate effectively with the outside world through non-verbal means even when their head is strictly immobilized.

[0030] 4. This invention, through multimodal input processing and a natural language processing engine, can intelligently understand patients' facial expressions and handwritten requests. With the help of an intelligent knowledge base and an emotional soothing engine, it proactively provides information and emotional support. This not only meets patients' basic communication needs but also proactively intervenes to alleviate postoperative anxiety, depression, and fear, improving treatment adherence and promoting rapid physical and mental recovery. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0032] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention;

[0033] Figure 2 For the present invention Figure 1The second schematic diagram of the three-dimensional structure in the diagram;

[0034] Figure 3 For the present invention Figure 2 A cross-sectional structural diagram of the main body of the patient bed;

[0035] Figure 4 For the present invention Figure 3 Schematic diagram of the headrest structure;

[0036] Figure 5 For the present invention Figure 4 Structural diagram of the middle limit slide plate and the limit clamping plate;

[0037] Figure 6 For the present invention Figure 2 Schematic diagram of the middle limit sleeve;

[0038] Figure 7 This is a schematic diagram of the system flow of the present invention.

[0039] In the picture:

[0040] 1. Main body of the patient bed; 11. Support legs; 12. Outer side panel; 13. Outer railing; 2. First screw; 21. Connecting slider; 22. Headrest; 23. First connecting sprocket; 24. Connecting chain; 25. Second connecting sprocket; 26. Rotating handle; 27. First screw sleeve; 28. Second screw; 29. ​​First handle; 3. Limiting slide plate; 31. Limiting slot; 32. Limiting plate; 33. Second handle; 34. Support spring; 4. Limiting sleeve; 41. Second screw sleeve; 42. Third screw; 43. Third handle; 5. Display screen; 51. Facial expression recognition interaction module; 52. Manual handwriting recognition module; 53. Multimodal input processing module; 54. Natural Language Processing (NLP) engine; 55. Intelligent knowledge base and response engine; 56. Emotion analysis and soothing engine. Detailed Implementation

[0041] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] As attached Figure 1 To be continued Figure 7 As shown:

[0043] Example 1: The present invention provides a head fixation device for clinical use in oral and maxillofacial surgery, including a patient bed body 1, a plurality of support legs 11 fixedly connected to the bottom of the patient bed body 1, an outer baffle 12 fixedly connected to the top of the patient bed body 1, and outer railings 13 fixedly connected to both sides of the top of the patient bed body 1.

[0044] An adjustment mechanism is provided on the inner wall and top and bottom ends of the main body 1 of the patient bed. The adjustment mechanism includes a first screw 2, which is connected to the inner wall of the main body 1 of the patient bed in two threads. A connecting slider 21 is fixedly connected to the top of one of the first screws 2, and a connecting slider 21 is slidably connected to the top of the other first screw 2. A headrest 22 is rotatably connected to the top of the two connecting sliders 21.

[0045] The bottom end of the first screw 2 is provided with a driving structure for driving the first screw 2 to work. The inner wall of one of the connecting sliders 21 is threaded with a second screw 28 for adjusting the position of one of the headrests 22. One end of the second screw 28 is fixedly connected to a first handle 29, and the other end of the second screw 28 is rotatably connected to the outside of the headrest 22. The headrest 22 adopts a flexible cushioning design with memory foam lining and medical-grade soft PU leather covering to conform to the contour of the patient's head and distribute pressure.

[0046] During operation, the staff first rotates the first handle 29 according to the width of the patient's head. The first handle 29 drives the second screw 28 to rotate. Since the second screw 28 is threadedly connected to a connecting slider 21, its rotational motion is converted into the horizontal movement of the connecting slider 21 and the headrest 22 above it along the top of the first screw 2, thereby adjusting the distance between the two flexible headrests 22 to accommodate patients with different head circumferences and achieve stable lateral clamping and fixation. Through this flexible buffer design, while providing stable support, it effectively avoids pressure discomfort or damage to the sides of the patient's head caused by hard materials.

[0047] 1. In one embodiment of the present invention, the driving structure includes a first connecting sprocket 23, which is fixedly connected to the bottom ends of two first screws 2 respectively, and a connecting chain 24 is meshed with the outer side walls of the two first connecting sprockets 23.

[0048] During operation, the operator first drives the connecting chain 24 to rotate, which in turn drives the two first connecting sprockets 23 to rotate synchronously. Through this chain drive structure, a single input source can synchronously drive the two first screws 2 to rotate, ensuring the synchronicity and stability of the two headrests 22 during height adjustment, and avoiding neck twisting or uneven force on the patient due to different heights.

[0049] 2. In one embodiment of the present invention, a second connecting sprocket 25 is engaged with the inner sidewall of one end of the connecting chain 24, and a first threaded sleeve 27 is fixedly connected to the outer sidewall of the patient bed body 1. A rotating handle 26 is also threadedly connected to the inner sidewall of the first threaded sleeve 27.

[0050] During operation, the operator first rotates the rotating handle 26. The rotating handle 26 moves axially within the first threaded sleeve 27, which in turn drives the second connecting sprocket 25 to press or tension the connecting chain 24, thereby driving the entire chain drive system to move. Through the thread self-locking principle, the rotating handle 26 can automatically lock its position when not manually rotated, preventing the headrest 22 from falling off by accident during patient use, thus ensuring the reliability and safety of the support.

[0051] 3. In one embodiment of the present invention, an adjustment mechanism is further provided between the connecting slider 21 and the headrest 22 for adjusting the angle of the headrest 22. The adjustment mechanism includes two limiting slide plates 3, which are slidably connected to the inner sidewall of the connecting slider 21. The inner sidewall of the limiting slide plates 3 is provided with a plurality of limiting slots 31. The headrest 22 is equipped with an inclination sensor for detecting the angle of the patient's head offset.

[0052] During operation, the staff first applies torque to the headrest 22, causing the fixed limiting slide plate 3 to slide within the connecting slider 21. Through the arc-shaped sliding trajectory of the limiting slide plate 3, the tilt angle of the headrest 22 can be continuously adjusted, allowing the patient to find a comfortable position that best matches the natural curvature of their neck, helping to alleviate neck fatigue caused by prolonged bed rest. Simultaneously, the tilt sensor built into the headrest (specifically, an SCL3300-D01 tilt sensor based on MEMS technology) begins continuous operation. This sensor accurately calculates the real-time tilt angle of the headrest, i.e., the patient's head, by measuring the change in the component of gravitational acceleration along the sensor axis, and converts this angle data into a digital signal output. When the system detects a continuous deviation from the preset safe range (such as the doctor's order of 20°±2° to the right or the midline position) exceeding the set threshold, the system immediately triggers a warning voice prompt, reminding the patient and medical staff to adjust their position in time, thereby ensuring the effective maintenance of the immobilization angle after the free flap surgery and guaranteeing the safety and stability of the vascular anastomosis.

[0053] 4. In one embodiment of the present invention, the inner walls of the plurality of limiting slots 31 are engaged with limiting plates 32, the limiting plates 32 are also slidably connected to the inner wall of the connecting slider 21, and a support spring 34 is fixedly connected between the limiting plates 32 and the connecting slider 21 for limiting the limiting plates 32. A second handle 33 is fixedly connected to the outer wall of the limiting plates 32.

[0054] During operation, the operator first pulls the second handle 33 outward. The second handle 33 causes the limiting plate 32 to compress the support spring 34 and disengage from the current limiting slot 31, at which point the headrest 22 angle can be adjusted. After adjustment, the second handle 33 is released, and the rebound force of the support spring 34 pushes the limiting plate 32 into the corresponding limiting slot 31. Through this spring-loaded locking structure, the angle adjustment is set in stages and locked quickly, ensuring that the headrest 22 can provide stable and reliable support at any adjustment angle and preventing angle deviation during use.

[0055] 5. In one embodiment of the present invention, the top of the outer railing 13 is engaged with a limiting sleeve 4, and the outer wall of the limiting sleeve 4 is also fixedly connected with a second screw sleeve 41. The inner wall of the second screw sleeve 41 is threaded with a third screw 42 for limiting the limiting sleeve 4. The outer wall of the third screw 42 is fixedly connected with a third handle 43. The other end of the limiting sleeve 4 is fixedly connected with an extension rod 44, and a display screen 5 is also installed on the outer side of the extension rod 44.

[0056] During operation, the staff first attaches the limiting sleeve 4 to the outer railing 13 of the hospital bed, and then rotates the third handle 43. The third handle 43 drives the third screw 42 to screw into the second screw sleeve 41 until the end of the third screw 42 tightly abuts against the inner wall of the outer railing 13. Through this quick clamping structure, the display screen 5 is installed firmly and flexibly on the hospital bed, which makes it easy for medical staff to adjust its position according to the patient's field of vision and operation needs, and also facilitates subsequent disassembly and maintenance.

[0057] 6. In one embodiment of the present invention, a head-fixed communication system for clinical use in oral and maxillofacial surgery includes a display screen 5, wherein the display screen 5 further includes an intelligent interactive front end for collecting non-verbal interaction input from patients;

[0058] The core processing and AI engine communicate with the intelligent interactive front end to analyze the non-verbal interaction input, identify the patient's intentions and emotional state, and generate personalized responses and reassurance content.

[0059] The intelligent interactive front end includes at least:

[0060] The facial expression recognition interaction module 51 is configured to capture facial expression data of a patient through an image sensor and recognize the facial expression data as specific communication instructions.

[0061] The handwriting recognition module 52 is configured to capture a patient's handwriting via a touch input device and recognize the handwriting as text information.

[0062] During operation, the system continuously or responsively collects patient input through an intelligent interactive front end. For patients who cannot speak due to head immobilization, they can express their needs by making preset facial expressions (such as blinking, frowning, or smiling) or by writing directly in the handwriting area of ​​the display screen 5. By combining two non-verbal interaction modes, the system provides patients with redundant and complementary communication channels, ensuring that communication requests can still be reliably captured and recognized by the system even when patients have limited functions or different preferences.

[0063] 7. In one embodiment of the present invention, the core processing and AI engine includes:

[0064] The multimodal input processing module 53 is communicatively connected to the facial expression recognition interaction module 51 and the handwriting recognition module 52, and is used to receive and integrate communication instructions recognized from facial expression data and text information recognized from handwriting to form a unified semantic input.

[0065] The Natural Language Processing (NLP) engine 54 is communicatively connected to the multimodal input processing module 53 and is used to perform intent recognition and sentiment analysis on the unified semantic input in order to understand the patient's needs and emotions.

[0066] During operation, the multimodal input processing module 53 fuses and weights the recognized facial expressions (such as the "pain" expression) with handwritten text (such as "wound pain") to form a more accurate comprehensive semantics (such as "complaint of wound pain"). The natural language processing (NLP) engine 54 then performs in-depth analysis of this comprehensive semantics to accurately understand the patient's core needs (need for pain relief) and current emotional state (anxiety, pain). Through multimodal information fusion and deep semantic understanding, the system's accuracy in interpreting the patient's complex, vague, or incomplete expressions of intent is greatly improved, laying the foundation for generating accurate responses.

[0067] 8. In one embodiment of the present invention, the core processing and AI engine further includes: an intelligent knowledge base and response engine 55, which is communicatively connected to the natural language processing (NLP) engine 54, for retrieving or dynamically generating corresponding answers, suggestions or entertainment content from the knowledge base based on the patient's intent;

[0068] The emotion analysis and soothing engine 56 is communicatively connected to the natural language processing (NLP) engine 54 and the intelligent knowledge base and response engine 55.

[0069] The emotion analysis and soothing engine 56 is configured to: continuously track changes in the patient's emotional state based on the results of the emotion analysis; and proactively send instructions to the intelligent knowledge base and response engine 55 when a preset negative emotion threshold is detected, in order to generate and push targeted emotion soothing content.

[0070] During operation, the intelligent knowledge base and response engine 55, based on the "wound pain" intent parsed by the NLP engine, retrieves answers from the medical knowledge base regarding the normality of postoperative pain and methods for relieving it, or generates soothing voice output. Simultaneously, the emotion analysis and soothing engine 56, based on the "anxiety and pain" emotions identified by the NLP engine, determines that their intensity exceeds a threshold, and proactively plays soothing music or guides the patient to perform deep breathing relaxation exercises through the intelligent knowledge base and response engine 55. Through this combination of "passive response" and "active intervention," the system not only meets the patient's information needs but also proactively addresses their negative psychological state, significantly improving the patient's psychological comfort and treatment compliance during the postoperative recovery period.

[0071] Working principle: When this device is needed, first adjust the spacing of the headrests 22 according to the size of the patient's head. By rotating the first handle 29, the first handle 29 rotates the second screw 28, causing the second screw 28 to move one of the headrests 22 left and right at the top of the first screw 21 via the connecting slider 21, adjusting the spacing between the headrests 22. After adjustment, adjust the height of the headrests 22 according to the patient's needs. First, rotate the rotating handle 26, causing the rotating handle 26 to rotate the outer connecting chain 24 via the second connecting sprocket 25, causing the connecting chain 24 to rotate the two first connecting sprockets 23 simultaneously. The two first connecting sprockets 23 will also rotate the first screw 2. At this time, the first screw 2 and the rotating handle 26 will rise and fall within the threads of the first screw sleeve 27 and the patient bed body 1, achieving adjustment. The purpose of adjusting the height of the headrest 22 is to pull the second handle 33 so that the second handle 33, along with the limiting plate 32, disengages from the limiting slot 31. Then, pull the headrest 22 so that the headrest 22, along with the limiting slide plate 3, slides and rotates out. After adjusting the angle, release the second handle 33 so that the limiting plate 32 engages with the limiting slot 31 to limit the limiting slide plate 3. After the surgery, the limiting sleeve 4 can be placed on the outside of the outer railing 13. Then, rotate the third handle 43 so that the third handle 43, along with the third screw 42, moves threadedly within the second screw sleeve 41 until the third screw 42 connects with the outer railing 13 to limit the limiting sleeve 4. Questions and answers can be conducted with the patient through the display screen 5.

[0072] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A head fixation device for clinical use in oral and maxillofacial surgery, characterized in that: The bed includes a patient bed body (1), with multiple support legs (11) fixedly connected to the bottom of the patient bed body (1), an outer baffle (12) fixedly connected to the top of the patient bed body (1), and outer railings (13) fixedly connected to both sides of the top of the patient bed body (1). An adjustment mechanism is provided on the inner wall and top and bottom ends of the main body (1) of the patient bed. The adjustment mechanism includes a first screw (2), which is connected to the inner wall of the main body (1) of the patient bed in two threads. A connecting slider (21) is fixedly connected to the top of one of the first screws (2), and a connecting slider (21) is slidably connected to the top of the other first screw (2). A headrest (22) is rotatably connected to the top of the two connecting sliders (21). The bottom end of the first screw (2) is provided with a driving structure for driving the first screw (2) to work. The inner wall of one of the connecting sliders (21) is threaded with a second screw (28) for adjusting the position of one of the headrests (22). One end of the second screw (28) is fixedly connected to a first handle (29), and the other end of the second screw (28) is rotatably connected to the outside of the headrest (22).

2. The head fixation device for clinical use in oral and maxillofacial surgery according to claim 1, characterized in that: The drive structure includes a first connecting sprocket (23), which is fixedly connected to the bottom of two first screws (2) respectively. The outer side walls of the two first connecting sprockets (23) are meshed with a connecting chain (24).

3. The head fixation device for clinical use in oral and maxillofacial surgery according to claim 2, characterized in that: The inner wall of one end of the connecting chain (24) is engaged with a second connecting sprocket (25), and the outer wall of the patient bed body (1) is fixedly connected with a first threaded sleeve (27), and the inner wall of the first threaded sleeve (27) is also threaded with a rotating handle (26).

4. The head fixation device for clinical use in oral and maxillofacial surgery according to claim 1, characterized in that: An adjustment mechanism is also provided between the connecting slider (21) and the headrest (22) for adjusting the angle of the headrest (22). The adjustment mechanism includes two limiting slide plates (3), which are slidably connected to the inner wall of the connecting slider (21). The inner wall of the limiting slide plates (3) is provided with multiple limiting slots (31). The headrest (22) is equipped with an inclination sensor to detect the angle of the patient's head offset.

5. The head fixation device for clinical use in oral and maxillofacial surgery according to claim 4, characterized in that: The inner walls of the multiple limiting slots (31) are engaged with limiting plates (32), the limiting plates (32) are also slidably connected to the inner wall of the connecting slider (21), a support spring (34) is fixedly connected between the limiting plates (32) and the connecting slider (21) for limiting the limiting plates (32), and a second handle (33) is fixedly connected to the outer wall of the limiting plates (32).

6. The head fixation device for clinical use in oral and maxillofacial surgery according to claim 1, characterized in that: The top of the outer railing (13) is engaged with a limiting sleeve (4). The outer wall of the limiting sleeve (4) is also fixedly connected with a second screw sleeve (41). The inner wall of the second screw sleeve (41) is threaded with a third screw (42) for limiting the limiting sleeve (4). The outer wall of the third screw (42) is fixedly connected with a third handle (43). The other end of the limiting sleeve (4) is fixedly connected with an extension rod (44). The outer side of the extension rod (44) is also equipped with a display screen (5).

7. A head fixation and communication system for clinical use in oral and maxillofacial surgery, characterized in that: Includes a display screen (5), which also includes an intelligent interactive front end for collecting non-verbal interaction input from the patient; The core processing and AI engine communicate with the intelligent interactive front end to analyze the non-verbal interaction input, identify the patient's intentions and emotional state, and generate personalized responses and reassurance content. The intelligent interactive front end includes at least: The facial expression recognition interaction module (51) is configured to capture facial expression data of a patient through an image sensor and recognize the facial expression data as specific communication instructions. The handwriting recognition module (52) is configured to capture the patient's handwriting through a touch input device and recognize the handwriting as text information.

8. The head fixation and communication system for clinical use in oral and maxillofacial surgery according to claim 7, characterized in that: The core processing and AI engine includes: The multimodal input processing module (53) is communicatively connected to the facial expression recognition interaction module (51) and the handwriting recognition module (52), and is used to receive and integrate the communication instructions recognized by facial expression data and the text information recognized by handwriting to form a unified semantic input; The Natural Language Processing (NLP) engine (54) is communicatively connected to the multimodal input processing module (53) for performing intent recognition and sentiment analysis on the unified semantic input in order to understand the patient's needs and emotions.

9. The head fixation and communication system for clinical use in oral and maxillofacial surgery according to claim 8, characterized in that: The core processing and AI engine also includes: an intelligent knowledge base and response engine (55), which is connected in communication with the natural language processing (NLP) engine (54) to retrieve or dynamically generate corresponding answers, suggestions or entertainment content from the knowledge base based on the patient's intent; The emotion analysis and soothing engine (56) is communicatively connected to the natural language processing (NLP) engine (54) and the intelligent knowledge base and response engine (55); The emotion analysis and soothing engine (56) is configured to: continuously track changes in the patient's emotional state based on the results of the emotion analysis; and proactively send instructions to the intelligent knowledge base and response engine (55) when a preset negative emotion threshold is detected, so as to generate and push targeted emotion soothing content.

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