Fixing device for vulva malignant tumor external radiotherapy

Abstract

The invention relates to the field of medical instruments, in particular to a fixing device for external radiotherapy of vulva malignant tumors, which comprises a treatment bed, an adjusting mechanism and a fixing mechanism are mounted on the treatment bed, the adjusting mechanism comprises a plurality of mounting racks, power parts are mounted on the mounting racks, the power parts are connected with rotating shafts, and base plates sleeve the rotating shafts. One end of the rotating shaft is sleeved with a limiting cylinder; an angle sensor is mounted on the rotating shaft; the fixing mechanism comprises arc-shaped plates, the arc-shaped plates are hinged to the base plate, constraint assemblies are installed on the arc-shaped plates, each constraint assembly comprises an air bag, honeycomb-shaped separation cavities are formed in the inner sides of the air bags, the separation cavities are communicated through one-way valves, and the air bags are communicated with an air pump; the power part is in signal connection with a controller, and the controller is used for controlling the power part to drive the rotating shaft to rotate according to angle data monitored by the angle sensor and controlling the air pump to inflate and deflate the separation cavity. Through the unique design of the adjusting mechanism and the fixing mechanism, accurate adjustment and stable fixation of the body position of a patient are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a fixing device for external radiotherapy of vulvar malignancies. BACKGROUND

[0002] Vulvar malignancies are one of the less common malignancies of the female reproductive system. Although the incidence is relatively low, it seriously threatens the life and health of women and the quality of life. External radiotherapy, as one of the important means of comprehensive treatment of vulvar malignancies, plays a key role in controlling tumor growth, killing cancer cells and improving patient survival rate.

[0003] During the external radiotherapy of vulvar malignancies, patients usually need to take lithotomy position. Lithotomy position is a specific surgical and examination position, in which the patient lies on the treatment bed with both legs placed on the leg support, the hip and knee joints are flexed, and the hips are moved to the edge of the treatment bed to fully expose the vulvar area, facilitating accurate positioning of the radiotherapy equipment and irradiation of the tumor area.

[0004] However, in the existing external radiotherapy of vulvar malignancies, there are many problems in patient position fixation. On the one hand, due to the long treatment time, patients are prone to body movement, limb fatigue and other conditions when maintaining lithotomy position for a long time, resulting in changes in body position. Small changes in body position can cause the target area of radiotherapy to deviate, affecting the accuracy of irradiation, reducing the treatment effect, and even causing unnecessary damage to the surrounding normal tissues. On the other hand, the commonly used fixation method is relatively simple, lacking effective adjustment and fixation mechanism, and it is difficult to adjust and fix accurately in real time according to the individual differences and body position changes of patients. For example, the traditional fixing device may not be able to adapt well to the body size and body shape of different patients, and the fixing effect may not be ideal for patients with a larger or smaller body shape, which cannot ensure that the patient is always in a stable and accurate body position during the entire treatment process.

[0005] To solve the above problems, the present application provides a fixing device for external radiotherapy of vulvar malignancies. SUMMARY

[0006] To solve the above problems, the present application provides a fixing device for external radiotherapy of vulvar malignancies, which is designed by unique adjustment mechanism and fixation mechanism to realize accurate adjustment and stable fixation of patient body position, and has pressure adjustment function, effectively improving treatment effect and patient experience.

[0007] In order to achieve the above object, the technical scheme of the present application is as follows: A fixing device for external radiotherapy of vulvar malignant tumor, comprising a treatment bed, an adjusting mechanism for adjusting the body position of a patient and a fixing mechanism for fixing the patient are installed on the treatment bed, the adjusting mechanism comprises a plurality of mounting racks, the mounting racks are respectively installed on both sides of the bottom of the treatment bed, a power component is installed on each mounting rack, an output shaft of the power component is coaxially and fixedly connected with a rotating shaft, a pad is sleeved on the rotating shaft, a limiting cylinder is sleeved on the end of the rotating shaft away from the power component, the limiting cylinder is fixedly connected with the rotating shaft, an angle sensor for monitoring the rotating angle of the rotating shaft in real time is installed on the rotating shaft.

[0008] The fixing mechanism comprises an arc-shaped plate, the arc-shaped plate is hingedly connected with the side of the pad away from the rotating shaft, a binding assembly is installed on the arc-shaped plate, the binding assembly comprises an air bag, the air bag is fixedly connected with the arc-shaped plate, a honeycomb-shaped separation cavity is arranged on the inner side of the air bag, the separation cavities are communicated through one-way valves, the air bag is communicated with an air pump, and the air pump is fixedly connected with the arc-shaped plate.

[0009] The power component is signal-connected with a controller, the controller is signal-connected with the angle sensor and the air pump, and the controller is used for controlling the power component to drive the rotating shaft to rotate according to the angle data monitored by the angle sensor, and simultaneously controlling the air pump to charge or discharge the separation cavities in the air bag.

[0010] Further, a pressure sensor is installed on the outer wall of the air bag, the pressure sensor is used for monitoring the pressure data generated by the air bag on the limbs of the patient in real time, the pressure sensor is signal-connected with the controller, and the controller controls the charging and discharging operation of the air pump according to the pressure data fed back by the pressure sensor.

[0011] Further, the end of the limiting cylinder away from the rotating shaft is fixedly connected with a sector gear, the sector gear is engaged with a half gear, the half gear is fixedly connected with an auxiliary plate, and the auxiliary plate is hingedly connected with the side of the pad.

[0012] Further, the binding assembly further comprises a plurality of belts, and the belts are fixedly connected with the side walls on both sides of the arc-shaped plate.

[0013] Further, the pad comprises a first plate and a second plate, the first plate and the second plate are hollow structures, the first plate and the second plate are slidingly matched, an electric telescopic rod is installed in the first plate, the end of the electric telescopic rod away from the first plate is fixedly connected with the inner side wall of the second plate, the electric telescopic rod is signal-connected with the controller, and the controller adjusts the telescopic length of the electric telescopic rod according to the pressure data monitored by the pressure sensor.

[0014] Further, a buffer air bag is arranged in the belt, the buffer air bag is communicated with a hose, the buffer air bag is connected with the separation cavities of the air bag through the hose, an electromagnetic valve is installed on the hose, and the electromagnetic valve is signal-connected with the controller.

[0015] When the pressure sensor detects that the local pressure of the air bag is too high, the controller controls the air pump to deflate while opening the corresponding electromagnetic valve, and part of the gas flows into the buffer bag.

[0016] Further, the outer side of the rotating shaft is sleeved with a torsion spring, one end of the torsion spring is fixed with the mounting frame, the other end of the torsion spring is fixed with the pad plate, a grating disc is arranged on the rotating shaft, and a photoelectric sensor is arranged on the mounting frame, the grating disc cooperates with the photoelectric sensor on the mounting frame, the photoelectric sensor is used for monitoring the rotation angle of the grating disc in real time, and the photoelectric sensor is signal connected with the controller.

[0017] When the patient's body position slightly moves to cause the rotating shaft to slightly rotate, the torsion spring generates a reverse torque to inhibit the rotation of the rotating shaft; when the photoelectric sensor detects that the rotation angle of the rotating shaft exceeds a preset threshold, a signal is transmitted to the controller, the controller drives the air pump to inflate the air bag, and the controller synchronously adjusts the extension amount of the electric telescopic rod.

[0018] Further, a liftable pelvic cavity support is arranged below the pad plate, chains are hingedly arranged on the two sides of the pelvic cavity support, one end of the chain away from the pelvic cavity support is fixedly connected with the rotating shaft, and a pressure sensing sheet is arranged on the surface of the pelvic cavity support and signal connected with the controller, so that the controller controls the electric telescopic rod to be lengthened or shortened when the pressure sensing sheet detects that the pressure value exceeds or is lower than a preset range.

[0019] Further, a heating assembly is arranged on the pelvic cavity support, the heating assembly comprises a heating pad, the heating pad is fixedly connected with the pelvic cavity support, an electric heating wire is arranged in the heating pad, the electric heating wire is signal connected with the controller, and the controller is used for adjusting the heating temperature of the electric heating wire according to the pressure data fed back by the pressure sensing sheet.

[0020] Further, the temperature sensor and the humidity sensor are signal connected with the controller.

[0021] A plurality of air holes are arranged on the bed plate of the treatment bed, a gas collecting cavity is arranged below the air holes, the gas collecting cavity is connected with the partition cavity, an air valve with adjustable opening degree is arranged in the air hole, the air valve is signal connected with the controller, and the controller controls the opening degree of the air valve according to the temperature and humidity data in the treatment process.

[0022] The above scheme has the following beneficial effects:

[0023] 1. Through the cooperative action of the power element, the rotating shaft, the angle sensor and the controller, the pad plate can be accurately controlled to flip to a precise angle to determine the patient's treatment position, compared with the traditional technology which depends on manual adjustment of the position and has large angle error and complicated operation, the patient's position can be quickly adjusted to the precise angle meeting the requirements of radiotherapy, the efficiency and precision of the position adjustment are greatly improved, and a solid guarantee is provided for the accuracy of radiotherapy.

[0024] 2. In this solution, the first and second plates of the pad slide together, and the length can be flexibly adjusted according to the patient's limb extension angle with the electric telescopic rod. In addition, the airbag and cushioning air bag can dynamically adjust the pressure according to the pressure data. Compared with the traditional technology where the fixation device has a single size and cannot be adapted to the limb characteristics of patients of different body types, it can achieve personalized adjustment for different patients and ensure that all types of patients can obtain a close and comfortable fixation effect.

[0025] 3. The meshing transmission of the sector gear and half gear in this scheme allows the auxiliary plate to rotate with the pad plate to form a stable support for the arc plate. Compared with the traditional technology where the arc plate lacks effective support and is prone to sag due to gravity and detach from the patient's limb, this scheme can ensure that the arc plate and airbag are always in close contact with the patient's limb, avoiding loosening of the fixation due to insufficient support and maintaining the stability of the treatment position.

[0026] 4. The outer side of the rotating shaft of this solution is equipped with a torsion spring, a grating disk, and a photoelectric sensor, which can promptly suppress micro-movements in the patient's body position and provide rapid feedback adjustment. Compared with traditional technologies that are slow to respond to micro-movements in the patient's body position and are prone to affecting treatment accuracy, the reverse torque of the torsion spring can initially suppress shaking. Once the micro-movement exceeds the limit, it can immediately link the airbag and electric telescopic rod for adjustment, ensuring the continuous stability of the body position during treatment.

[0027] 5. The pelvic support in this solution can rotate and rise with the pivot. Combined with the pressure sensor and heating element, it can provide appropriate support and temperature for the patient's pelvis. Compared with traditional techniques that lack dedicated support and temperature control for the pelvis and are prone to causing discomfort to patients, this solution can adjust the support strength through pressure feedback and adjust the heating temperature according to needs, significantly improving the patient's treatment comfort.

[0028] 6. This solution can adjust the temperature and humidity of the treatment bed surface in real time through the linkage of temperature sensor, humidity sensor and ventilation valve. Compared with the traditional technology where the treatment bed has no temperature and humidity adjustment function and patients are prone to stuffiness and discomfort when lying down for a long time, this solution can flexibly adjust the opening of the ventilation holes according to the monitoring data and use the airflow of the airbag to achieve temperature and humidity balance and create a comfortable treatment environment.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] Fig. 1 This is an isometric view of an embodiment of the fixation device for external radiotherapy of vulvar malignant tumors of the present invention;

[0031] Fig. 2 This is a schematic diagram illustrating the use of an embodiment of the fixation device for external radiotherapy of vulvar malignant tumors according to the present invention;

[0032] Fig. 3The mounting schematic view of the adjusting mechanism in the embodiment of the vulva malignant tumor external radiotherapy fixing device.

[0033] The reference signs in the drawings of the specification include: 1, treatment bed; 2, mounting frame; 3, power member; 4, rotating shaft; 5, pad plate; 501, first plate; 502, second plate; 6, limiting cylinder; 601, sector gear; 7, arc plate; 8, auxiliary plate; 801, half gear; 9, bandage. DETAILED DESCRIPTION

[0034] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The specific embodiments will be described in further detail below:

[0038] Embodiment 1:

[0039] As shown in the accompanying drawings Figs. 1 to 3As shown: a vulva malignant tumor external radiotherapy fixing device, including a treatment bed 1, the treatment bed 1 is installed on the adjusting mechanism for adjusting the patient position and the fixing mechanism for fixing the patient, the adjusting mechanism includes several mounting frames 2, the mounting frames 2 are respectively installed on both sides of the bottom of the treatment bed 1, the power components 3 are installed on the mounting frames 2, the power components 3 are motors in the embodiment, the output shafts of the power components 3 are coaxially fixedly connected with the rotating shafts 4, the rotating shafts 4 are all sleeved with the gaskets 5, the rotating shafts 4 are sleeved with the limiting cylinders 6 at the ends away from the power components 3, the limiting cylinders 6 are fixedly connected with the rotating shafts 4, the rotating shafts 4 are installed with the angle sensors for monitoring the rotating angle of the rotating shafts 4 in real time, the limiting cylinders 6 are fixedly connected with the sector gears 601 at the ends away from the rotating shafts 4, the sector gears 601 are engaged with the half gears 801, the half gears 801 are fixedly connected with the auxiliary plates 8, the auxiliary plates 8 are hinged with one side of the gaskets 5 (combined Fig. 3 As shown).

[0040] The fixing mechanism includes the arc-shaped plates 7, the arc-shaped plates 7 are hinged with one side of the gaskets 5 away from the rotating shafts 4, the arc-shaped plates 7 are all installed with the binding assemblies, the binding assemblies include the air bags, the air bags are fixedly connected with the arc-shaped plates 7, the inner side of the air bags is provided with the honeycomb-shaped separated cavities, the separated cavities are communicated through the one-way valves, the air bags are communicated with the air pumps, the air pumps are fixedly connected with the arc-shaped plates 7, the power components 3 are signal connected with the controllers, the controllers are signal connected with the angle sensors and the air pumps, the controllers are used for controlling the power components 3 to drive the rotating shafts 4 to rotate according to the angle data monitored by the angle sensors, and simultaneously controlling the air pumps to charge and discharge the separated cavities in the air bags, the outer side walls of the air bags are installed with the pressure sensors, the pressure sensors are used for monitoring the pressure data generated by the air bags to the patient's limbs in real time, the pressure sensors are signal connected with the controllers, and the controllers control the charging and discharging operation of the air pumps according to the pressure data fed back by the pressure sensors.

[0041] The gaskets 5 include the first plates 501 and the second plates 502 (combined Fig. 3 As shown), the first plates 501 and the second plates 502 are hollow structures, the first plates 501 and the second plates 502 are slidingly matched, the electric telescopic rods are installed in the first plates 501, the electric telescopic rods are fixedly connected with the inner side walls of the second plates 502 at the ends away from the first plates 501, the electric telescopic rods are signal connected with the controllers, and the controllers adjust the telescopic length of the electric telescopic rods according to the pressure data monitored by the pressure sensors.

[0042] The specific implementation process is as follows: after the patient lies on the treatment bed 1, the two legs are respectively placed in the arc-shaped plate 7 on the two side pad plates 5, and the medial side of the lower leg is in initial contact with the air bag on the arc-shaped plate 7. The medical staff starts the power component 3 (motor) through the controller, the motor output shaft drives the rotating shaft 4 to rotate, and the rotating shaft 4 synchronously drives the pad plate 5 provided thereon to overturn upward. At this time, the sector gear 601 fixedly connected with the limiting cylinder 6 rotates with the rotating shaft 4, drives the meshed half gear 801 to rotate, and the half gear 801 drives the auxiliary plate 8 to overturn with the hinge point of the pad plate 5 as the axis, thereby forming the lifting support of the arc-shaped plate 7, avoiding the arc-shaped plate 7 from falling off the patient's limbs due to gravity in the process of overturning the pad plate 5.

[0043] In the process of overturning the pad plate 5, the angle sensor monitors the rotating angle of the rotating shaft 4 in real time, and transmits the data to the controller. The controller adjusts the rotating speed of the motor in real time according to the received angle data, so that the pad plate 5 overturns stably. At the same time, the controller receives the initial pressure data of the air bag outside pressure sensor (the pressure value is lower than the preset threshold value at this time) in real time, and synchronously starts the electric telescopic rod. The electric telescopic rod accurately drives the second plate 502 to slide outward along the first plate 501 according to the pressure distribution situation fed back by the pressure sensor. Since the first plate 501 and the second plate 502 are in sliding fit, and the electric telescopic rod is connected with the two plates, the second plate 502 can flexibly adjust the position according to the angle of the patient's lower limbs, thereby driving the arc-shaped plate 7 to move synchronously, and ensuring that the air bag is always attached to the skin of the medial side of the patient's lower leg, avoiding the occurrence of gap.

[0044] When the pad plate 5 overturns to a 60° angle with the surface of the treatment bed 1, the patient's lower limbs are lifted and gradually unfolded, and finally present the lithotomy position conforming to the needs of radiotherapy. After receiving the 60° angle signal transmitted by the angle sensor of the rotating shaft 4, the controller automatically stops the operation of the power component 3, and at this time the pad plate 5 remains at this angle position.

[0045] After the patient's position is fixed as the lithotomy position, the controller sends the inflation instruction to the air pump according to the final angle signal (60° overturning angle) of the power component 3. The air pump inflates the honeycomb-shaped separated cavities of the air bag through the main pipeline. In the initial stage, each separated cavity is connected with each other through the one-way valve, so as to realize balanced air intake. With the inflation, the pressure sensor monitors the pressure data of the air bag on the medial side of the patient's lower leg in real time, and feeds back the data to the controller. When the pressure sensor detects that the pressure value of a certain area (such as one side of the lower leg) reaches the preset threshold value (20kPa), the controller closes the air inlet valve of the corresponding separated cavity, and the remaining separated cavities continue to inflate.

[0046] During the subsequent inflation process, if the pressure sensor detects that the local pressure is too high (exceeding 30 kPa), the controller will immediately drive the electric telescopic rod to fine-tune the position of the second plate 502, adjust the contact state of the air bag with the patient's limbs by changing the angle and position of the arc-shaped plate 7, and control the air pump to deflate the separated cavities in the high-pressure area. Since the separated cavities are connected by one-way valves, only the gas in the high-pressure area is reduced during deflation, without affecting other areas, until the overall pressure of the air bag on the patient's limbs is balanced, and all areas are within the preset range of 20-30 kPa, and the controller stops the air pump's inflation and deflation operation.

[0047] During treatment, if the treatment needs to adjust the lithotomy angle, the medical staff inputs a new angle instruction through the controller, the controller drives the motor to reverse rotation, the shaft 4 drives the backing plate 5 to slowly descend, and the meshing transmission of the sector gear 601 and the half gear 801 makes the auxiliary plate 8 fall back synchronously. The supporting force of the auxiliary plate 8 on the arc-shaped plate 7 is adjusted accordingly with the change of the angle. At this time, the pressure sensor detects that the pressure value decreases, the controller controls the electric telescopic rod to retract, and the second plate 502 resets along the first plate 501. Since the electric telescopic rod is connected with the controller signal, its retraction length is accurately adjusted according to the pressure data fed back by the pressure sensor, ensuring that the arc-shaped plate 7 always maintains appropriate contact position with the patient's limbs with the change of the angle of the backing plate 5.

[0048] At the same time, the air pump adjusts the air bag inflation according to the angle change signal. When the angle decreases, the patient's lower limb position decreases, the limb pressure on the air bag changes, and the air pump appropriately deflates. When the angle increases, the air pump appropriately inflates, and the pressure of the air bag on the patient's limbs is always maintained within the preset range.

[0049] During treatment, the pressure sensor continuously monitors the pressure data of the air bag on the patient's limbs, and transmits the data to the controller every certain time interval. If the patient's limbs move slightly and cause local pressure abnormalities, such as the pressure of a certain area suddenly exceeding 30 kPa or being lower than 20 kPa, the controller will quickly respond to control the air pump to inflate and deflate the separated cavities in the corresponding area, and fine-tune the length of the electric telescopic rod, so that the pressure quickly returns to the normal range, ensuring the stability of the patient's body position during treatment.

[0050] After treatment, the medical staff issues a reset instruction through the controller. The controller first controls the air pump to deflate the air bag. The air pump extracts the gas in each separated cavity of the air bag through the main pipeline, and the pressure sensor monitors the pressure change in real time. When the pressure value drops to zero, the air pump stops working. Subsequently, the controller drives the motor to reverse rotation, the shaft 4 drives the backing plate 5 to slowly turn down, and the angle sensor monitors the angle change in real time. When the backing plate 5 returns to parallel with the surface of the treatment bed 1, the motor stops running.

[0051] During the process of resetting the cushion plate 5, the controller controls the electric telescopic rod to retract to the shortest state, so that the second plate 502 is completely accommodated in the first plate 501, the auxiliary plate 8 is turned back to the initial position with the cushion plate 5, and the arc-shaped plate 7 is also naturally reset. At this time, the whole device completes the whole process of a treatment, and waits for the next use.

[0052] Embodiment 2

[0053] As shown in the accompanying drawings Fig. 3 The difference from embodiment 1 is that the binding assembly further comprises a plurality of binding belts 9, which are respectively fixedly connected with the side walls on both sides of the arc-shaped plate 7.

[0054] The inside of the binding belt 9 has a buffer air bag, the buffer air bag is communicated with a hose, the buffer air bag is connected with the separated cavities of the air bag through the hose, and an electromagnetic valve is installed on the hose, and the electromagnetic valve is signal-connected with the controller; when the pressure sensor detects that the local pressure of the air bag is too high, the controller controls the air pump to deflate at the same time, and opens the corresponding electromagnetic valve, and part of the gas flows into the buffer air bag.

[0055] The specific implementation process is as follows: after the patient lies on the treatment bed 1 and places both legs on the cushion plate 5, the medical staff winds the binding belts 9 on both sides of the arc-shaped plate 7 around the outside of the patient's lower leg, and preliminarily fixes them through magic tape or buckles, so that the buffer air bag is attached to the skin on the outside of the lower leg. At this time, the electromagnetic valve on the hose is in the closed state, and there is no gas in the buffer air bag.

[0056] When the patient's body position is fixed in the lithotomy position, and the air pump is inflating the honeycomb-shaped separated cavities of the air bag, when the pressure sensor detects that the pressure value of a certain area of the air bag reaches the preset threshold value (20kPa), the controller closes the air inlet valve of the corresponding separated cavity, and the remaining separated cavities continue to inflate. If subsequent detection shows that the pressure of the area is too high (more than 30kPa), the controller will drive the electric telescopic rod to fine-tune the position of the second plate 502, control the air pump to deflate the separated cavity of the high-pressure area, and at the same time, the electromagnetic valve connected with the separated cavity through the hose will be opened.

[0057] Since the buffer air bag is connected with the separated cavities of the air bag through the hose, and there is high pressure in the separated cavities, after the electromagnetic valve is opened, part of the gas flows into the buffer air bag through the hose, so that the buffer air bag expands and generates appropriate pressure on the outside of the patient's lower leg. At this time, the pressure sensor monitors the pressure change in the air bag in real time, and when the pressure of the area decreases to the preset range of 20-30kPa, the controller closes the electromagnetic valve and stops the deflation operation of the air pump, so as to ensure that the air bag and the buffer air bag cooperate to form balanced and stable binding force on the lower leg of the patient from the inside and outside.

[0058] During the treatment, if the slight movement of the patient's limbs causes the local pressure of the air bag to exceed 30 kPa again, the controller will repeat the above operation, open the corresponding electromagnetic valve, and make part of the gas flow into the buffer gas bag until the pressure returns to normal. When it is necessary to adjust the angle of the lithotomy position and the air pump adjusts the inflation amount of the air bag, if the pressure in the air bag drops below 20 kPa, the controller will open the electromagnetic valve to make the gas in the buffer gas bag flow back to the separation chamber of the air bag through the hose, supplement the amount of gas in the air bag, and maintain the preset pressure range.

[0059] When the treatment is over and the controller controls the air pump to deflate the air bag, it will simultaneously open all the electromagnetic valves to make the gas in the buffer gas bag flow into the separation chamber of the air bag through the hose, and then be pumped out by the air pump. When the pressure sensor shows that the pressure values in the air bag and the buffer gas bag have both dropped to zero, the air pump stops working and the electromagnetic valves are closed. The medical staff unfastens the straps 9 and the patient can leave the treatment bed 1.

[0060] Example 3:

[0061] The difference between this example and Example 2 is that a torsion spring (not shown in the figure) is sleeved outside the rotating shaft 4, one end of the torsion spring is fixed to the mounting frame 2, the other end of the torsion spring is fixed to the pad 5, and a grating disc is arranged on the rotating shaft 4. A photoelectric sensor is installed on the mounting frame 2. The grating disc cooperates with the photoelectric sensor on the mounting frame 2. The photoelectric sensor is used to monitor the rotation angle of the grating disc in real time, and the photoelectric sensor is signal-connected with the controller. When the patient's body position moves slightly and causes the rotating shaft 4 to rotate slightly, the torsion spring generates a reverse torque to inhibit the rotation of the rotating shaft 4. When the photoelectric sensor detects that the rotation angle of the rotating shaft 4 exceeds a preset threshold value, it transmits a signal to the controller, and the controller drives the air pump to inflate the air bag, and at the same time the controller synchronously adjusts the extension amount of the electric telescopic rod.

[0062] The specific implementation process is as follows: when the patient's body position moves slightly during the treatment due to discomfort or other reasons, causing the pad 5 to move slightly, the pad 5 will drive the rotating shaft 4 to rotate slightly. At this time, the torsion spring will generate a reverse torque due to the rotation of the rotating shaft 4, which will hinder the further rotation of the rotating shaft 4, thereby inhibiting the shaking amplitude of the patient's limbs and playing a role in preliminarily stabilizing the body position.

[0063] At the same time, the grating disc on the rotating shaft 4 rotates synchronously with the rotating shaft 4, and the photoelectric sensor on the mounting frame 2 captures the slight displacement of the rotating shaft 4 by monitoring the rotation angle of the grating disc. If the photoelectric sensor detects that the rotation angle of the rotating shaft 4 does not exceed a preset threshold value (such as 1°), the body position is only stabilized by the reverse torque of the torsion spring, and the controller does not issue additional instructions.

[0064] When the patient's body position has a large amplitude of movement, so that the photoelectric sensor detects that the rotation angle of the rotating shaft 4 exceeds the preset threshold, the photoelectric sensor will immediately transmit a signal to the controller. After receiving the signal, the controller drives the air pump to inflate the separated cavity of the air bag on the one hand, increases the pressure of the air bag on the inside of the patient's calf, and restricts the limb shaking by enhancing the binding force; on the other hand, the controller synchronously adjusts the extension amount of the electric telescopic rod, drives the second plate 502 to slide along the first plate 501 according to the rotation direction and angle fed back by the photoelectric sensor, adjusts the position of the arc-shaped plate 7, and makes the air bag more fit the patient's limb, further stabilizing the body position.

[0065] During the air pump inflation and electric telescopic rod adjustment process, the pressure sensor monitors the pressure data of the air bag on the patient's limb in real time. If the pressure value exceeds 30kPa, the controller will control the air pump to deflate the separated cavity in the high pressure area according to the original logic, and at the same time open the corresponding electromagnetic valve, so that part of the gas flows into the buffer gas bag, ensuring that the pressure is maintained within the preset range.

[0066] When the patient's limb recovers to be stable, the photoelectric sensor detects that the rotating shaft 4 rotates back to the initial angle range, and the pressure data fed back by the pressure sensor is normal, the controller will control the air pump to stop inflating, and the electric telescopic rod to keep the current length, and the torsional spring also returns to the state without torque, and the whole device returns to the stable treatment state.

[0067] After the treatment is completed, as the pad plate 5 resets, the rotating shaft 4 rotates back to the initial position, the torque of the torsional spring is gradually released, and the grating disc and the photoelectric sensor also return to the initial relative position, ready for the next treatment.

[0068] Embodiment 4:

[0069] The difference between embodiment 3 and embodiment 4 is that a liftable pelvic cavity support (not shown in the figure) is installed below the pad plate 5, chains are hinged on both sides of the pelvic cavity support, one end of the chain away from the pelvic cavity support is fixedly connected with the rotating shaft 4, and a pressure sensitive sheet is arranged on the surface of the pelvic cavity support. The pressure sensitive sheet is signal connected with the controller, and when the pressure sensitive sheet detects that the pressure value exceeds or is lower than the preset range, the controller controls the electric telescopic rod to extend or shorten.

[0070] A heating assembly is installed on the pelvic cavity support, the heating assembly comprises a heating pad, the heating pad is fixedly connected with the pelvic cavity support, an electric heating wire is arranged in the heating pad, the electric heating wire is signal connected with the controller, and the controller is used for adjusting the heating temperature of the electric heating wire according to the pressure data fed back by the pressure sensitive sheet.

[0071] The specific implementation process is as follows: after the patient lies on the treatment bed 1, the pelvic support is initially in the lowest position and is attached to the surface of the treatment bed 1. When the pad 5 is turned over upward under the drive of the motor, the rotating shaft 4 synchronously drives the two side chains to be pulled up, and the pelvic support is gradually lifted along with the chain traction until it contacts the pelvic part of the patient. At this time, the pressure sensing sheet on the surface of the pelvic support starts to monitor the contact pressure, and the initial pressure value is fed back to the controller as a reference parameter.

[0072] During the adjustment of the patient's body position to the lithotomy position, the pressure sensing sheet transmits the pressure data of the pelvic part to the controller in real time. If the detected pressure value is lower than the preset range (such as <5kPa), it indicates that the pelvic support is not closely attached to the patient, and the controller immediately instructs the electric telescopic rod to lengthen, the second plate 502 slides outward along the first plate 501, and the arc plate 7 is expanded outward, indirectly changing the position of the patient's limbs to make the pelvic part more closely attached to the pelvic support until the pressure sensing sheet feeds back the pressure to reach the preset range (5-10kPa). If the pressure value is higher than the preset range (such as >10kPa), the controller controls the electric telescopic rod to shorten, reducing the pressure on the pelvic support, and ensuring the comfort of the patient.

[0073] During the treatment, the controller adjusts the working state of the heating assembly according to the real-time pressure data fed back by the pressure sensing sheet. When the pressure value is in the normal range (5-10kPa), the controller controls the electric heating wire to be powered on, and the temperature of the heating pad gradually rises to the preset comfortable temperature (such as 36-37℃), relieving the muscle tension of the patient's pelvic part through gentle heating. If the pressure sensing sheet detects that the pressure value suddenly rises (such as >15kPa), it indicates that the patient may have limb tension due to discomfort, and the controller immediately reduces the power of the electric heating wire to make the temperature of the heating pad drop to 34-35℃, avoiding the aggravation of discomfort by high temperature; if the pressure value continuously drops below 5kPa, the controller stops heating to prevent local overheating of the heating pad when it is not closely attached.

[0074] When the patient's body position moves slightly, the rotating shaft 4 rotates, in addition to the original stability mechanism of the torsion spring and the air bag, the pelvic support slightly shakes with the chain, and the pressure sensing sheet instantaneously captures the pressure fluctuation. If the fluctuation amplitude is within the preset range (±1kPa), the controller only adjusts the electric telescopic rod to fine-tune the position; if the fluctuation exceeds the preset range (such as >2kPa), the controller enhances the restraint force of the air bag while quickly adjusting the length of the electric telescopic rod, stabilizes the pelvic part by changing the position of the patient's lower limbs, and makes the pressure sensing sheet feedback data return to the normal range.

[0075] After the treatment is completed, the pad 5 is reset under the drive of the motor, the rotating shaft 4 reversely rotates to drive the chain to relax, and the pelvic support slowly descends to the initial position under the action of gravity. After the pressure sensing sheet detects that the pressure value is zero, the controller cuts off the power supply of the electric heating wire, and the heating pad stops working. The whole device returns to the initial state, waiting for the next use.

[0076] Example 5

[0077] The difference from Example 4 is that a temperature sensor and a humidity sensor are installed on the treatment bed 1, and both are signal-connected with the controller; a plurality of air vents (not shown in the figure) are opened on the bed plate of the treatment bed 1, and a gas collection cavity is arranged below the air vents, which is communicated with the partition cavity; an air valve with adjustable opening degree is installed in the air vent, and the air valve is signal-connected with the controller; the controller controls the opening degree of the air valve according to the temperature and humidity data in the treatment process.

[0078] The specific implementation process is as follows: after the patient lies on the treatment bed 1, the temperature sensor and the humidity sensor on the treatment bed 1 start to work immediately, and monitor the temperature and humidity data of the surface of the treatment bed 1 and the contact area between the patient and the bed surface in real time, and continuously transmit the data to the controller as the initial monitoring benchmark.

[0079] During the treatment process, when the patient's local temperature and humidity increase due to long treatment time or changes in body state, the temperature sensor detects that the temperature exceeds the preset value (such as 38℃), or the humidity sensor detects that the humidity exceeds the preset value (such as 60%), the controller will respond immediately. At this time, the controller controls the opening degree of the air valve in the air vent according to the exceeding degree of the temperature and humidity data. If the temperature and humidity are slightly exceeded, the air valve is opened by 30%-50% of the opening degree, the gas collection cavity is communicated with the partition cavity of the air bag, and the airflow generated during the inflation and deflation process of the air bag is used to form natural convection through the air vent, thereby taking away part of the heat and humidity; if the temperature and humidity are seriously exceeded, the air valve is fully opened to enhance the air flow efficiency and quickly reduce the local temperature and humidity.

[0080] When the temperature sensor detects that the temperature is lower than the preset comfortable value (such as 35℃), and the humidity is in the normal range, the controller will appropriately reduce the opening degree of the air valve, or even close the valve to reduce heat loss, and cooperate with the heating assembly on the pelvic support to maintain the appropriate temperature. If the humidity is lower than the preset value (such as 40%), the controller will adjust the opening degree of the air valve while combining the feedback data of the pressure sensor, and if the patient is in close contact with the bed surface, the opening degree can be appropriately reduced to maintain a certain humidity, so as to avoid the patient's discomfort caused by too dry.

[0081] During the inflation and deflation of the airbag, the communication state between the air collection chamber and the partition chamber enables the airbag gas flow to drive the air circulation in the air collection chamber, and then affect the temperature and humidity of the surface of the treatment bed 1 through the air vent. The controller will comprehensively feedback data of temperature sensor, humidity sensor, pressure sensor and other components, and cooperatively adjust the opening degree of the air valve. For example, when the airbag is deflated, part of the gas is discharged from the air vent through the air collection chamber, at this time, if the temperature and humidity are high, the controller will increase the opening degree of the valve, and use the exhaust gas flow to enhance heat dissipation and humidity removal; when the airbag is inflated, the external air can enter the air collection chamber through the air vent to supplement, and the controller adjusts the opening degree of the valve according to the real-time temperature and humidity, so as to ensure that the entering air does not adversely affect the local temperature and humidity.

[0082] When the patient's position needs to be adjusted during treatment, such as changing the lithotomy angle, with the turning of the pad 5 and the extension and retraction of the electric telescopic rod, the contact area between the patient and the treatment bed 1 changes, and the temperature sensor and the humidity sensor update the monitoring data in real time. The controller adjusts the opening degree of the air valve according to the new temperature and humidity data, so as to ensure that the patient can still maintain a comfortable temperature and humidity environment during the change of the body position.

[0083] After the treatment is completed, when the patient is about to leave the treatment bed 1, the controller controls the air valve to be fully opened according to the signal that the current temperature and humidity fed back by the temperature sensor and the humidity sensor have returned to the normal range, accelerates the air circulation on the surface of the treatment bed 1, and makes the bed surface quickly return to the initial state, so as to prepare for the use of the next patient. At the same time, with the deflation of the airbag, the airflow in the air collection chamber is discharged through the fully opened air vent, and the whole temperature and humidity adjustment cycle is completed.

[0084] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the implementation. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the implementation is not required or can not be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A fixation device for external beam radiotherapy of vulvar malignant tumors, comprising a treatment bed (1), wherein the treatment bed (1) is equipped with an adjustment mechanism for adjusting the patient's position and a fixation mechanism for fixing the patient, characterized in that, The adjustment mechanism includes several mounting brackets (2), which are respectively installed on both sides of the bottom of the treatment bed (1). Each mounting bracket (2) is equipped with a power component (3). The output shaft of each power component (3) is coaxially fixedly connected to a rotating shaft (4). Each rotating shaft (4) is fitted with a pad (5). Each end of the rotating shaft (4) away from the power component (3) is fitted with a limiting sleeve (6). The limiting sleeve (6) is fixedly connected to the rotating shaft (4). An angle sensor for real-time monitoring of the rotation angle of the rotating shaft (4) is installed on the rotating shaft (4). The fixing mechanism includes an arc plate (7), which is hinged to the pad (5) on the side away from the pivot (4). Each arc plate (7) is equipped with a restraint assembly, which includes an airbag. The airbag is fixedly connected to the arc plate (7). The airbag has a honeycomb-shaped partition cavity inside, which is connected to the partition cavity through a one-way valve. The airbag is connected to an air pump, which is fixedly connected to the arc plate (7). The power component (3) is connected to a controller. The controller is connected to the angle sensor and the air pump. The controller is used to control the power component (3) to drive the rotating shaft (4) to rotate according to the angle data monitored by the angle sensor, and at the same time control the air pump to inflate and deflate the compartment in the airbag.

2. The fixation device for external beam radiotherapy of vulvar malignant tumors according to claim 1, characterized in that, A pressure sensor is installed on the outer wall of the airbag. The pressure sensor is used to monitor the pressure data generated by the airbag on the patient's limb in real time. The pressure sensor is connected to the controller signal. The controller controls the inflation and deflation of the air pump based on the pressure data fed back by the pressure sensor.

3. The fixation device for external beam radiotherapy of vulvar malignant tumors according to claim 2, characterized in that, A sector gear (601) is fixedly connected to one end of the limiting cylinder (6) away from the rotating shaft (4). The sector gear (601) meshes with a half gear (801). The half gear (801) is fixedly connected to an auxiliary plate (8). The auxiliary plate (8) is hinged to one side of the pad (5).

4. The fixation device for external beam radiotherapy of vulvar malignant tumors according to claim 3, characterized in that, The restraint assembly also includes several straps (9), which are fixedly connected to the side walls on both sides of the arc plate (7).

5. The fixation device for external beam radiotherapy of vulvar malignant tumors according to claim 4, characterized in that, The pad (5) includes a first plate (501) and a second plate (502). The first plate (501) and the second plate (502) are hollow structures. The first plate (501) and the second plate (502) are slidably fitted together. An electric telescopic rod is installed inside the first plate (501). The end of the electric telescopic rod away from the first plate (501) is fixedly connected to the inner side wall of the second plate (502). The electric telescopic rod is connected to the controller signal. The controller adjusts the telescopic length of the electric telescopic rod according to the pressure data monitored by the pressure sensor.

6. The fixation device for external beam radiotherapy of vulvar malignant tumors according to claim 5, characterized in that, The inner side of the strap (9) is provided with a cushioning air bag, which is connected to a hose. The cushioning air bag is connected to the airbag's partition cavity through the hose. A solenoid valve is installed on the hose, and the solenoid valve is connected to the controller signal. When the pressure sensor detects that the local pressure in the airbag is too high, the controller controls the air pump to release air while opening the corresponding solenoid valve, allowing some gas to flow into the buffer airbag.

7. The fixation device for external beam radiotherapy of vulvar malignant tumors according to claim 6, characterized in that, A torsion spring is fitted on the outside of the rotating shaft (4). One end of the torsion spring is fixed to the mounting bracket (2), and the other end of the torsion spring is fixed to the pad (5). A grating disk is provided on the rotating shaft (4), and a photoelectric sensor is installed on the mounting bracket (2). The grating disk cooperates with the photoelectric sensor on the mounting bracket (2). The photoelectric sensor is used to monitor the rotation angle of the grating disk in real time. The photoelectric sensor is connected to the controller signal. When the patient's body position changes slightly, causing the rotating shaft (4) to rotate slightly, the torsion spring generates a reverse torque to suppress the rotation of the rotating shaft (4). When the photoelectric sensor detects that the rotation angle of the rotating shaft (4) exceeds the preset threshold, it transmits the signal to the controller, which drives the air pump to inflate the airbag. At the same time, the controller synchronously adjusts the extension and retraction of the electric telescopic rod.

8. The fixation device for external beam radiotherapy of vulvar malignant tumors according to claim 7, characterized in that, A liftable pelvic support is installed under the pad (5). Chains are hinged on both sides of the pelvic support. The end of the chain away from the pelvic support is fixedly connected to the rotating shaft (4). A pressure sensor is provided on the surface of the pelvic support. The pressure sensor is connected to the controller signal. When the pressure sensor detects that the pressure value exceeds or falls below the preset range, the controller controls the electric telescopic rod to extend or shorten.

9. The fixation device for external beam radiotherapy of vulvar malignant tumors according to claim 8, characterized in that, A heating assembly is installed on the pelvic support. The heating assembly includes a heating pad, which is fixedly connected to the pelvic support. An electric heating wire is provided inside the heating pad and is connected to a controller. The controller is used to adjust the heating temperature of the electric heating wire according to the pressure data fed back by the pressure sensor.

10. The fixation device for external beam radiotherapy of vulvar malignant tumors according to claim 9, characterized in that, The treatment bed (1) is equipped with a temperature sensor and a humidity sensor, both of which are connected to the controller signal. The treatment bed (1) has several ventilation holes on its bed board. Below the ventilation holes is an air collection chamber, which is connected to the partition chamber. An adjustable ventilation valve is installed in the ventilation hole. The ventilation valve is connected to the controller signal. The controller controls the opening of the ventilation valve according to the temperature and humidity data during the treatment process.

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