Head stabilizing device for cerebral angiography

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a head stabilizing device for cerebral angiography, which comprises a frame, a controller is mounted on the upper inner wall of the frame, a bottom support is fixedly mounted on the lower inner wall of the frame, side supports are arranged on two sides of the bottom support, a mounting cavity is formed in the position, close to the bottom, of the frame, and a side moving mechanism is arranged in the mounting cavity. The side moving mechanism is used for driving the two side supports to get close to each other so as to fix the two sides of the head, two top supports are symmetrically arranged on the upper side of the bottom support, a horizontal frame is arranged on the upper sides of the two top supports, an electric push rod is fixedly connected between the horizontal frame and the upper inner wall of the frame, and the lower side of each top support is covered with a silica gel pad; the contradiction that stability and comfort cannot be achieved at the same time in the prior art is solved, and the accuracy and safety of cerebral angiography are remarkably improved through the nested layout structure.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a head stabilization device for cerebral angiography. Background Art

[0002] Cerebral angiography is a minimally invasive interventional surgery, which is the gold standard for examining and detecting stenotic and occlusive sites of cerebral blood vessels, moyamoya disease, aneurysms, and arteriovenous malformations. Fixing the patient's head during clinical cerebral angiography is particularly important. The swinging of the patient's head will affect the doctor's operation, resulting in deviation of the examination results, and bringing great inconvenience to subsequent treatment, diagnosis, and nursing.

[0003] Patent No. CN107951501A discloses a head screw rod adjustment and fixation device for cardiovascular and cerebrovascular angiography, including an upper fixing ring, a right screw thread adjustment device, a lower fixing ring, and a left screw thread adjustment device. A first screw rod is provided on the left screw thread adjustment device. The first screw rod passes through a second screw pipe, and the lower end of the second screw pipe is fixed on a first screw pipe. A second screw rod is inserted inside the first screw pipe. The right screw thread adjustment device has the same structure as the left screw thread adjustment device. Two semi-fixing rings are provided on the upper fixing ring. A closing plate is fixed at the upper end of the semi-fixing ring. Two main fixing devices are symmetrically provided about the center at the lower end of the closing plate. A secondary fixing device is provided on the semi-fixing ring at the lower end of the main fixing device. The lower fixing ring has the same structure as the upper fixing ring.

[0004] Currently, the head fixing devices basically use a rigid fixing method. The rigid fixing device may cause scalp pain, pressure sores, and even nerve compression, limit the natural fine adjustment of the head, cause cervical discomfort. When the operation time is long, the patient may have headache and nausea due to too tight fixation. Standardized fixing pads or head frames are difficult to perfectly fit all patients. Therefore, we propose a head stabilization device for cerebral angiography. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a head stabilization device for cerebral angiography to solve the problems existing in the above background art.

[0006] The present invention provides the following technical solution: a head stabilization device for cerebral angiography, comprising a frame, a controller mounted on the upper inner wall of the frame, a bottom bracket fixedly mounted on the lower inner wall of the frame, side brackets being arranged on both sides of the bottom bracket, a mounting cavity being arranged near the bottom of the frame, a side movement mechanism being arranged in the mounting cavity, the side movement mechanism being used to drive the two side brackets to approach each other to fix the two sides of the head, two top brackets being symmetrically arranged on the upper side of the bottom bracket, a horizontal frame being arranged on the upper side of the two top brackets, the horizontal frame being fixedly connected to the upper inner wall of the frame There is an electric push rod, and the lower side of each top support is covered with a silicone pad. The lower side of the horizontal frame is slidably connected to two linkage rods, and the two linkage rods are connected to the upper side of the corresponding top support through ear shafts. An angle adjustment mechanism is provided between the two top supports and the linkage rods. A group of filling components are provided in the two top supports. A fine-tuning mechanism is provided on the horizontal frame, and the distance between the two top supports is adjusted by the fine-tuning mechanism to adapt to different head shapes. An external box is provided on one side of the frame, and a liquid filling mechanism and a gas filling mechanism are provided between the frame and the external box.

[0007] Each group of the filling components includes a water bag and an air bag. The water bag is fixedly installed in the top support, and the air bag is embedded in the side of the water bag close to the horizontal frame. The liquid filling mechanism is used to fill liquid into the water bag, and the gas filling mechanism is used to fill gas into the air bag.

[0008] Furthermore, the liquid filling mechanism includes a liquid storage tank, a metering pump, a first long tube and a first short tube. The liquid storage tank is fixedly connected to the external box, the metering pump is connected between the liquid storage tank and the first long tube, two first short tubes are provided, which are respectively connected to the liquid inlets of the two water bags, and the first long tube is connected to the two first short tubes through a tee.

[0009] Furthermore, the gas filling mechanism includes an air pump, a second long tube and a second short tube. The air pump is fixedly connected to the external box, the second long tube is fixedly connected to the output end of the air pump, two second short tubes are provided, which are respectively connected to the two air bag air inlets, and the second long tube is connected to the two second short tubes through a tee.

[0010] Furthermore, the side moving mechanism includes a first motor, a spur gear, a rack, a slider and a reinforcement plate, the first motor is fixedly connected in the mounting cavity, the spur gear is fixedly connected to the output end of the first motor, two racks, two sliders and two reinforcement plates are each provided, the two sliders are slidably connected in the mounting cavity, the two racks are respectively fixedly connected to the side close to the two sliders, and the two racks are meshed with the spur gears, the two reinforcement plates are respectively fixedly connected to the top of the corresponding sliders, and the two side supports are respectively fixedly connected to the side close to the two reinforcement plates.

[0011] Furthermore, the fine-tuning mechanism includes a second motor, a double-threaded lead screw, and a lead screw sleeve. The second motor is fixedly connected to one end of the horizontal frame. The double-threaded lead screw is rotatably connected inside the horizontal frame and is fixedly connected to the output end of the second motor. There are two lead screw sleeves, which are respectively fitted and installed at the upper ends of the corresponding linkage rods, and the two lead screw sleeves are respectively threadedly connected to different threads of the double-threaded lead screw.

[0012] Furthermore, each set of the angle adjustment mechanisms includes an electric telescopic rod and an angle sensor. The two ends of the electric telescopic rod are connected between the top support and the linkage rod through trunnions, and the angle sensor is fixedly connected to the surface of the top support to detect the deflection angle of the top support.

[0013] Furthermore, a scale grating is fixedly connected to the side of the horizontal frame, and a reading end is fixedly installed on the side of one of the linkage rods.

[0014] Furthermore, a support sleeve is fixedly connected to the side of the horizontal frame, and both the first long tube and the second long tube pass through the support sleeve.

[0015] The technical effects and advantages of the present invention are as follows:

[0016] 1. By providing a water sac and an air sac, the present invention is conducive to achieving high-precision fixation and comfort protection of the head through nested design and synergistic action. The water sac is filled with liquid through a liquid filling mechanism, and the air sac is filled with gas through a gas filling mechanism. According to different head shapes, the filling amounts of the two are jointly adjusted, which can adapt to different head shapes, expanding the scope of use. Moreover, the water sac provides rigid and incompressible support to inhibit macroscopic displacement of the head, and the air sac realizes dynamic flexible fitting, dispersing pressure and compensating for micro-movement, achieving the dual effects of static stability and dynamic balance. During the operation, if the head deviates, the air sac will deform and buffer first, and the water sac will maintain the overall stability, solving the contradiction in the prior art that stability and comfort cannot be achieved at the same time. Its nested layout structure significantly improves the accuracy and safety of cerebral angiography, especially suitable for complex interventional surgeries. Compared with the prior art that relies on metal splints or screw mechanical compression, it effectively avoids problems such as scalp pressure sores and the need for manual repeated adjustment.

[0017] 2. By providing a fine-tuning mechanism, the present invention is conducive to adapting to the forehead widths of different patients, ensuring uniform distribution of bilateral pressure. The double-thread design eliminates the risk of unilateral loosening and prevents the head from rotating during the operation, solving the pain points of low efficiency and poor accuracy in traditional manual adjustment. Its fast response and high-stability design significantly improve the accuracy and convenience of head fixation in cerebral angiography, especially suitable for complex surgeries that require frequent adjustment.

[0018] 3. The present invention is provided with an angle adjustment mechanism, which is beneficial to dispersing the forehead pressure by adjusting the angle of the top support, avoiding local compression, working in cooperation with the fine adjustment mechanism, suppressing the slight movement of the head in the front-back direction, solving the defect that the traditional rigid fixation cannot be dynamically adapted, and its high response speed and precise pressure management significantly improve the surgical safety and patient comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a sectional view of the overall structure of the present invention.

[0021] Figure 3 It is a schematic top view of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the top fixing block of the present invention.

[0023] Figure 5 It is an exploded schematic diagram of the top fixing block of the present invention.

[0024] Figure 6 It is a schematic diagram of the airbag and water bag structures of the present invention.

[0025] Figure 7 It is a schematic diagram of the reverse movement mechanism of the present invention.

[0026] Reference numerals are: 1, frame; 101, installation cavity; 2, bottom support; 3, side support; 4, side movement mechanism; 401, first motor; 402, spur gear; 403, rack; 404, slider; 405, reinforcement plate; 5, top support; 501, silicone pad; 502, linkage rod; 503, water bag; 504, airbag; 6, horizontal frame; 601, electric push rod; 6011, auxiliary telescopic rod; 7, fine adjustment mechanism; 701, second motor; 702, double-threaded lead screw; 703, lead screw sleeve; 8, liquid filling mechanism; 801, liquid storage tank; 802, metering pump; 803, first long tube; 804, first short tube; 9, gas filling mechanism; 901, air pump; 902, second long tube; 903, second short tube; 10, support sleeve; 11, angle adjustment mechanism; 1101, electric telescopic rod; 1102, angle sensor; 12, scale grating; 1201, reading end; 13, controller; 14, external box. DETAILED DESCRIPTION OF THE INVENTION

[0027] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings of the present invention. In addition, the forms of each structure described in the following embodiments are merely examples. A head stabilization device for cerebral angiography according to the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] Referring to Figures 1-7 , the present invention provides a head stabilization device for cerebral angiography, including a frame 1. A controller 13 is installed on the upper inner wall of the frame 1. A bottom support 2 is fixedly installed on the lower inner wall of the frame 1. Side supports 3 are provided on both sides of the bottom support 2. An installation cavity 101 is provided near the bottom of the frame 1. A side movement mechanism 4 is arranged in the installation cavity 101. The side movement mechanism 4 is used to drive the two side supports 3 to approach each other to fix both sides of the head. Two top supports 5 are symmetrically arranged on the upper side of the bottom support 2. A horizontal frame 6 is arranged on the upper side of the two top supports 5. An electric push rod 601 is fixedly connected between the horizontal frame 6 and the upper inner wall of the frame 1. A silica gel pad 501 covers the lower side of each top support 5. Two linkage rods 502 are slidably connected to the lower side of the horizontal frame 6. Both linkage rods 502 are connected to the upper side of the corresponding top support 5 through trunnions. Angle adjustment mechanisms 11 are arranged between the two top supports 5 and the linkage rods 502. A set of filling components are arranged in each of the two top supports 5. A fine adjustment mechanism 7 is arranged on the horizontal frame 6. The distance between the two top supports 5 is adjusted through the fine adjustment mechanism 7 to adapt to different head shapes. An external box 14 is arranged on one side of the frame 1. A liquid filling mechanism 8 and a gas filling mechanism 9 are arranged between the frame 1 and the external box 14.

[0029] Each set of filling components includes a water bag 503 and an air bag 504. The water bag 503 is fixedly installed in the top support 5. The air bag 504 is fitted and installed on the side of the water bag 503 close to the horizontal frame 6. The liquid filling mechanism 8 is used to fill the water bag 503 with liquid. The gas filling mechanism 9 is used to fill the air bag 504 with gas.

[0030] In this embodiment, it should be specifically noted that: the bottom support 2 is used to support the occipital part and the lateral side of the patient's head. The lateral movement mechanism 4 is used to adjust the distance between the two lateral supports 3, control the two lateral supports 3 to move synchronously inward, and gently clamp the temporal region of the head. The top support 5 is a key fixing component located on the patient's forehead, and together with the bottom support 2 and the lateral supports 3, it forms a three-point stable structure. Its core function is to limit the movement of the head in the front-back direction. Both top supports 5 are arc-shaped structures, and the corresponding silica gel pads 501 are also arc-shaped. The silica gel pads 501 are made of medical silica gel material, which is widely used in implantable medical devices, rarely causes allergies, has a soft elasticity that fits the head shape, disperses pressure, reduces the risk of pressure sores, can withstand alcohol, high-temperature and high-pressure sterilization, and is suitable for repeated use. The high-end reusable fixing device is especially suitable for long-term surgeries. The electric push rod 601 can push the horizontal frame 6 to move, so as to adjust the positions of the top support and the horizontal frame 6 as a whole. Auxiliary telescopic rods 6011 are arranged on both sides of the electric push rod 601 to ensure that the linear movement of the horizontal frame 6 will not deviate. The fine adjustment mechanism 7 is used to adjust the distance between the two top supports 5, so that the two top supports 5 move closer to or away from each other synchronously, and then adapt to the frontal widths of different patients. The angle adjustment mechanism 11 is used to adjust the angle of the top support 5. Different patients have different head shapes. Through the double-layer mechanical linkage of the fine adjustment mechanism 7 and the angle adjustment mechanism 11, the precise positioning and dynamic stability of the top support 5 are jointly realized, ensuring that the head fixation is both firm and comfortable.

[0031] The main difference between this embodiment and the prior art is that this embodiment adopts a liquid filling mechanism 8 and a gas filling mechanism 9 to cooperate with the water bag 503 and the air bag 504. Specifically, the external box 14 is located about fifty centimeters away from the frame 1 and will not interfere with the installation and use of the frame 1. The water bag 503 and the air bag 504 are designed in the top support 5. Through the nested design and synergistic effect, high-precision fixation and comfortable protection of the head are achieved. The water bag 503 is close to the scalp layer and the surface is covered with a silicone pad 501. The silicone pad 501 is in direct contact with the forehead or the occipital region and is located on the inner side of the filling component and is fixedly installed in the rigid frame of the top support 5. The water bag 503 and the air bag 504 adopt a nested layout of "liquid inside and gas outside". The water bag 503 provides basic support and the air bag 504 adapts to the head shape. The water bag 503 is injected through the liquid filling mechanism 8 Liquid is injected into the airbag 504, and gas is filled into the airbag 504 through the gas filling mechanism 9. According to different head shapes, the filling amounts of the two are adjusted in conjunction, which can adapt to different head shapes and expand the scope of use. In addition, the water bag 503 provides rigid incompressible support to suppress the macroscopic displacement of the head. The airbag 504 achieves dynamic flexible fitting, disperses pressure and compensates for micro-movements, and realizes the dual effects of static stability and dynamic balance. If the head deviates during the operation, the airbag 504 will deform and buffer first, and the water bag 503 will maintain overall stability, which solves the contradiction between stability and comfort in traditional technology. Its nested layout structure significantly improves the accuracy and safety of cerebral angiography, and is especially suitable for complex interventional surgery. Compared with the existing technology that relies on metal splints or screws for mechanical compression, it effectively avoids problems such as scalp pressure sores and the need for manual repeated adjustment.

[0032] The above structure is the main structure of this embodiment, which solves the problems caused by the rigid fixation of the existing head stabilization device. The water bag 503 and the air bag 504 are existing structures. The specific structure and connection method of the liquid filling mechanism 8 and the gas filling mechanism 9 are not described in detail in this embodiment. In addition, the fine-tuning mechanism 7 and the angle adjustment mechanism 11 also belong to the existing technology. Therefore, this application does not make detailed limitations.

[0033] It should be noted that traditional metal (such as aluminum alloy, stainless steel) frames or screws may produce artifacts in DSA and block blood vessel visualization. In this solution, non-active structures such as the frame 1, horizontal frame 6, and linkage shaft 502 are replaced with carbon fiber composite materials. Carbon fiber has almost no attenuation of X-rays, ensuring clear images.

[0034] Reference Figures 4-5 The liquid filling mechanism 8 includes a liquid storage tank 801, a metering pump 802, a first long tube 803 and a first short tube 804. The liquid storage tank 801 is fixedly connected to the external box 14. The metering pump 802 is connected between the liquid storage tank 801 and the first long tube 803. Two first short tubes 804 are provided, which are respectively connected to the liquid inlets of the two water bags 503. The first long tube 803 is connected to the two first short tubes 804 through a tee.

[0035] In this embodiment, it should be specifically noted that: the liquid storage tank 801 is used to store liquid and is the core system for controlling the filling and drainage of the water sac 503. By precisely adjusting the injection volume of physiological saline, the stability of the rigid support of the head is ensured. During operation, the liquid is pumped into the first long tube 803 by a metering pump 802, then enters the two first short tubes 804, and finally enters the water sac 503 respectively, realizing the injection of liquid into the water sac 503 to form an incompressible rigid support layer. After the operation, one-key start reverse pumping to empty the water sac 503 for disassembly. The specifically filled liquid can be selected from physiological saline and medical silicone oil. Preferably, a pressure sensor can be installed in the water sac 503 to monitor the pressure during the operation in real time. If the pressure of the water sac is insufficient or too large during the operation, liquid is automatically supplemented and discharged to maintain stability. Through the high-precision metering pump and the closed pipeline system, the pain points of poor precision and inability to dynamically adjust in the traditional liquid fixation technology are solved.

[0036] Refer to Figures 4-5 , the gas filling mechanism 9 includes an air pump 901, a second long tube 902 and second short tubes 903. The air pump 901 is fixedly connected in the external box 14. The second long tube 902 is fixedly connected to the output end of the air pump 901. There are two second short tubes 903, which are respectively connected to the air inlets of the two air bags 504. The second long tube 902 is connected to the two second short tubes 903 through a tee.

[0037] In this embodiment, it should be specifically noted that: the gas filling mechanism 9 is the core system for filling gas into the air bag 504. The air pump 901 is close to the controller 13, which is convenient for operation and maintenance. During operation, gas is pumped into the second long tube 902 by the air pump 901, then passes through the tee and enters the second short tubes 903 respectively, and finally is injected into the air bag 504, realizing the filling of gas into the air bag 504. Preferably, a pressure sensor is installed in the air bag 504 to monitor the pressure of the air bag 504 in real time. The pressure sensor feeds back data to the controller 13 to dynamically adjust the inflation and deflation. According to the head shape and intraoperative micro-movement, it automatically inflates or deflates to avoid being too tight or too loose. When a head displacement is detected, the air pressure adjustment can be completed within 0.5 seconds. Used in cooperation with the water sac 503, the water sac 503 provides rigid support, and then through the flexible fitting of the air bag 504, a "rigid-flexible composite" fixation is formed, solving the pain points of slow response and uneven pressure in the traditional gas fixation technology, and significantly improving the surgical safety and patient comfort.

[0038] Preferably, in addition to air, nitrogen can also be selected for the gas. By connecting a nitrogen tank to the air pump 901, nitrogen is an inert gas and does not react with air bag materials such as medical silicone and polyurethane. Long-term use will not cause the air bag to age or degrade. Nitrogen has a low coefficient of thermal expansion, and the influence of temperature fluctuations in the operating room such as the illumination of the shadowless lamp on its pressure is extremely small, ensuring the constant pressure of the air bag 504.

[0039] Reference Figure 2 and Figure 7 Figure 7 , the side movement mechanism 4 includes a first motor 401, a spur gear 402, a rack 403, a slider 404 and a reinforcement plate 405. The first motor 401 is fixedly connected inside the installation cavity 101. The spur gear 402 is fixedly connected to the output end of the first motor 401. There are two racks 403, sliders 404 and reinforcement plates 405. Both sliders 404 are slidably connected inside the installation cavity 101. The two racks 403 are respectively fixedly connected to the adjacent sides of the two sliders 404, and both racks 403 are meshed with the spur gear 402. The two reinforcement plates 405 are respectively fixedly connected to the tops of the corresponding sliders 404. The two side supports 3 are respectively fixedly connected to the adjacent sides of the two reinforcement plates 405.

[0040] In this embodiment, it should be specifically noted that: the side support 3, the slider 404 and the rack 403 are an integral structure. The spur gear 402 is located between the two racks 403. The first motor 401 provides power, usually a stepper motor or a servo motor is selected to drive the spur gear 402 to rotate. Then the spur gear 402 and the rack 403 convert the rotational motion into a linear motion, driving the slider 404 to move horizontally, so that the two side supports 3 move synchronously and in opposite directions, that is, the two side supports 3 approach or move away from each other. By the two side supports 3 approaching each other, the two sides of the patient's head can be quickly and accurately clamped to ensure that the head does not swing left and right during the operation, adapt to different patient head circumferences, and the adjustment range is usually 120 - 200 mm. If the head is slightly offset, such as caused by coughing, the side movement mechanism 4 can fine-tune the position of the side support in real time to compensate for the displacement, and cooperate with the top support 5. After lateral fixation, the top support 5 presses down to form a three-point support to inhibit the rotation of the head, solving the defects of slow traditional manual adjustment and low accuracy. Its high response speed and dynamic adjustment ability significantly improve the efficiency and safety of head fixation in cerebral angiography, especially suitable for complex interventional surgeries.

[0041] Reference Figure 5 Figure 5 , the fine adjustment mechanism 7 includes a second motor 701, a double-threaded lead screw 702 and a lead screw sleeve 703. The second motor 701 is fixedly connected to one end of the horizontal frame 6. The double-threaded lead screw 702 is rotatably connected inside the horizontal frame 6. The double-threaded lead screw 702 is fixedly connected to the output end of the second motor 701. There are two lead screw sleeves 703, which are respectively fitted and installed at the upper ends of the corresponding linkage rods 502. The two lead screw sleeves 703 are respectively threadedly connected to different threads of the double-threaded lead screw 702.

[0042] In this embodiment, it should be specifically noted that: The second motor 701 provides power to drive the double-threaded lead screw 702 to rotate. The thread directions on both sides of the double-threaded lead screw 702 are opposite. When rotating, it drives the two lead screw sleeves 703 to move closer to or away from each other synchronously. The lead screw sleeve 703 is fixed to the linkage rod 502, directly pushing the top support 5 to move horizontally. The two top supports 5 move towards or away from each other synchronously, adapting to different forehead widths of patients. The adjustment range is usually 120 - 180 mm. After the distance between the top supports 5 is adjusted, the water bag 503 and the air bag 504 are automatically filled to ensure uniform distribution of bilateral pressure. The double-thread design eliminates the risk of unilateral loosening and prevents the head from rotating during the operation, solving the pain points of low efficiency and poor accuracy in traditional manual adjustment. Its fast response and high stability design significantly improve the accuracy and convenience of head fixation in cerebral angiography, especially suitable for complex surgeries that require frequent adjustment.

[0043] Refer to Figure 5 , each group of angle adjustment mechanisms 11 includes an electric telescopic rod 1101 and an angle sensor 1102. Both ends of the electric telescopic rod 1101 are connected to the top support 5 and the linkage rod 502 through trunnions. The angle sensor 1102 is fixedly connected to the surface of the top support 5 to detect the deflection angle of the top support 5.

[0044] In this embodiment, it should be specifically noted that: When the electric telescopic rod 1101 expands and contracts, the angle of the top support 5 will change. The angle sensor 1102 will continuously monitor the deflection angle of the top support 5. During the operation, by adjusting the angle of the top support 5, the forehead pressure is dispersed to avoid local compression, and it works in coordination with the fine adjustment mechanism 7 to inhibit the micro-movement of the head in the front-back direction, solving the defect that traditional rigid fixation cannot be dynamically adapted. Its high response speed and precise pressure management significantly improve the surgical safety and patient comfort.

[0045] Refer to Figure 5 , a scale grating 12 is fixedly connected to the side of the horizontal frame 6, and a reading end 1201 is fixedly installed on the side of one of the linkage rods 502.

[0046] In this embodiment, it should be specifically noted that: The reading end 1201 moves with the linkage rod 502, used to continuously monitor the horizontal movement distance of the top support 5, ensuring the accuracy and repeatability of the head fixation position, solving the pain point of traditional devices relying on visual calibration, significantly improving the automation level and safety of the operation, especially suitable for neurointerventional therapy that requires sub-millimeter-level stability.

[0047] Preferably, a support sleeve 10 is fixedly connected to the side of the horizontal frame 6. Both the first long tube 803 and the second long tube 902 pass through the support sleeve 10. The support sleeve 10 is used to protect the first long tube 803 and the second long tube 902, accommodating them in the same channel to prevent the pipeline from being blocked or damaged due to pulling, folding or squeezing during the operation.

[0048] Working principle of the present invention:

[0049] The main problems solved in this embodiment are as follows: By using the nested layout of "liquid inside and gas outside" of the water bag 503 and the air bag 504, according to different head shapes, the filling amounts of the two are jointly adjusted, which can adapt to different head shapes, solve the contradiction that stability and comfort cannot be both achieved in the traditional technology, and its nested layout structure significantly improves the accuracy and safety of cerebral angiography; By using the double-layer mechanical linkage of the fine-tuning mechanism 7 and the angle adjustment mechanism 11, the precise positioning and dynamic stability of the top support 5 are jointly realized, ensuring that the head fixation is both firm and comfortable, and solving the problems of low efficiency and poor accuracy in traditional manual adjustment.

[0050] The specific steps are as follows:

[0051] S1. Preoperative preparation: Confirm that there is no leakage in the water bags 503 and 504, check that the equipment functions normally, then the patient lies supine, the occipital part fits the bottom support 2, and the height of the frame 1 is adjusted so that the head is naturally centered;

[0052] S2. Initial fixation: Start the side movement mechanism 4, the first motor 401 drives the spur gear 402 to rotate, the spur gear 402 drives the two racks 403 to move in opposite directions, and finally drives the side supports 3 to move inwards synchronously, gently touching both sides of the head. The scale grating 12 monitors the displacement in real time and automatically stops at the preset head width. The memory cotton pad of the bottom support 2 adapts to the occipital curve and disperses the pressure;

[0053] S3. Adjustment and filling: Drive the double-threaded lead screw 702 to rotate through the second motor 701, so that the double-threaded lead screw 702 drives the top support 5 to approach the forehead, and the distance adapts to the frontal width. Then, inject normal saline into the water bag 503 through the metering pump 802 to form a rigid support. Finally, the air pump 901 fills the air bag 504 with nitrogen to fit the scalp flexibly;

[0054] S4. Intraoperative dynamic monitoring: Real-time monitor the deflection of the top support 5 through the angle sensor 1102, and the angle adjustment mechanism 11 automatically adjusts the angle to maintain stability. When the monitored pressure exceeds the limit, the air bag 504 automatically relieves pressure to maintain the contact pressure stable;

[0055] S5. Postoperative release: After the operation is completed, empty the water bag 503 and the air bag 504, and the side support 3 and the top support 5 automatically return to their original positions.

[0056] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A head stabilization device for cerebral angiography, comprising a frame (1), characterized in that: A controller (13) is installed on the upper inner wall of the frame (1), a bottom support (2) is fixedly installed on the lower inner wall of the frame (1), and side supports (3) are provided on both sides of the bottom support (2). A mounting cavity (101) is provided near the bottom of the frame (1), and a side moving mechanism (4) is provided in the mounting cavity (101). The side moving mechanism (4) is used to drive the two side supports (3) to move closer to each other to fix the two sides of the head. Two top supports (5) are symmetrically provided on the upper side of the bottom support (2), and a horizontal frame (6) is provided on the upper side of the two top supports (5). An electric push rod (601) is fixedly connected between the horizontal frame (6) and the upper inner wall of the frame (1), and the lower side of each top support (5) is covered. The horizontal frame (6) is covered with a silicone pad (501). Two linkage rods (502) are slidably connected to the lower side of the horizontal frame (6). The two linkage rods (502) are connected to the upper side of the corresponding top support (5) through ear shafts. An angle adjustment mechanism (11) is provided between the two top supports (5) and the linkage rods (502). A group of filling components are provided in the two top supports (5). A fine-tuning mechanism (7) is provided on the horizontal frame (6). The distance between the two top supports (5) is adjusted by the fine-tuning mechanism (7) to adapt to different head shapes. An external box (14) is provided on one side of the frame (1). A liquid filling mechanism (8) and a gas filling mechanism (9) are provided between the frame (1) and the external box (14). Each group of the filling components includes a water bag (503) and an air bag (504), wherein the water bag (503) is fixedly installed in the top support (5), and the air bag (504) is embedded and installed on a side of the water bag (503) close to the horizontal frame (6). The liquid filling mechanism (8) is used to fill the water bag (503) with liquid, and the gas filling mechanism (9) is used to fill the air bag (504) with gas.

2. The head stabilization device for cerebral angiography according to claim 1, wherein: The liquid filling mechanism (8) comprises a liquid storage tank (801), a metering pump (802), a first long tube (803) and a first short tube (804); the liquid storage tank (801) is fixedly connected to the external box (14); the metering pump (802) is connected between the liquid storage tank (801) and the first long tube (803); two first short tubes (804) are provided, respectively connected to the liquid inlets of the two water bags (503); the first long tube (803) and the two first short tubes (804) are connected via a tee.

3. The head stabilization device for cerebral angiography according to claim 1, wherein: The gas filling mechanism (9) comprises an air pump (901), a second long tube (902) and a second short tube (903); the air pump (901) is fixedly connected to the external box (14); the second long tube (902) is fixedly connected to the output end of the air pump (901); two second short tubes (903) are provided, which are respectively connected to the air inlets of two air bags (504); the second long tube (902) and the two second short tubes (903) are connected through a tee.

4. A head stabilization device for cerebral angiography according to claim 1, characterized in that: The side movement mechanism (4) includes a first motor (401), a spur gear (402), a rack (403), a slider (404) and a reinforcement plate (405). The first motor (401) is fixedly connected inside the installation cavity (101). The spur gear (402) is fixedly connected to the output end of the first motor (401). There are two racks (403), two sliders (404) and two reinforcement plates (405). Both of the two sliders (404) are slidably connected inside the installation cavity (101). The two racks (403) are respectively fixedly connected to the adjacent sides of the two sliders (404), and both of the two racks (403) are engaged with the spur gear (402). The two reinforcement plates (405) are respectively fixedly connected to the tops of the corresponding sliders (404). The two side supports (3) are respectively fixedly connected to the adjacent sides of the two reinforcement plates (405).

5. The head stabilization device for cerebral angiography according to claim 1, wherein: The fine adjustment mechanism (7) includes a second motor (701), a double-threaded lead screw (702) and a lead screw sleeve (703). The second motor (701) is fixedly connected to one end of the horizontal frame (6). The double-threaded lead screw (702) is rotatably connected inside the horizontal frame (6). The double-threaded lead screw (702) is fixedly connected to the output end of the second motor (701). There are two lead screw sleeves (703), which are respectively fitted and installed at the upper ends of the corresponding linkage rods (502). The two lead screw sleeves (703) are respectively threadedly connected to different threads of the double-threaded lead screw (702).

6. The head stabilization device for cerebral angiography according to claim 1, wherein: Each set of the angle adjustment mechanism (11) includes an electric telescopic rod (1101) and an angle sensor (1102). The two ends of the electric telescopic rod (1101) are connected between the top support (5) and the linkage rod (502) through trunnions. The angle sensor (1102) is fixedly connected to the surface of the top support (5) to detect the deflection angle of the top support (5).

7. The head stabilization device for cerebral angiography according to claim 5, wherein: A scale grating (12) is fixedly connected to the side of the horizontal frame (6). A reading end (1201) is fixedly installed on the side of one of the linkage rods (502).

8. A head stabilization device for cerebral angiography according to claim 7, characterized in that: A support sleeve (10) is fixedly connected to the side of the horizontal frame (6). Both the first long tube (803) and the second long tube (902) pass through the support sleeve (10).

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