CN112156380B

CN112156380B - Accurate radiotherapy fixing device of somatic part

Info

Publication number: CN112156380B
Application number: CN202011154954.XA
Authority: CN
Inventors: 廖煜良; 张书旭; 王锐濠; 王琳婧; 李慧君; 周露; 张国前
Original assignee: Cancer Center of Guangzhou Medical University
Current assignee: Cancer Center of Guangzhou Medical University
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2022-09-23
Anticipated expiration: 2040-10-26
Also published as: CN112156380A

Abstract

The invention discloses a body part accurate radiotherapy fixing device and a using method thereof, and belongs to the technical field of medical auxiliary instruments. A fixing device for radiotherapy with accurate body part and a using method thereof, which comprises a bed body, wherein both sides of the upper end of the bed body are connected with fixing plates, the inner wall of the fixing plate is connected with a first air cylinder, a first piston is connected in the first air cylinder in a sliding way, a first spring is connected in the first air cylinder, one end of the first piston, which is far away from the fixed plate, is connected with a limit plate, two symmetrical second air cylinders are fixedly connected to one side of the bed body, which is far away from the limit plate, through the arrangement of a back pressure plate, a hip pressure plate, the limit plate, a foot pedal and the like, can carry out comprehensive fixed to the patient, prevent when the radiotherapy, rock and lead to the accuracy of radiotherapy to reduce because of patient's part, make its radiotherapy equipment cause permanent damage to other positions of patient, effectual improvement carry out accurate rate when radiotherapy to the patient, reinforcing radiotherapy effect.

Description

Accurate radiotherapy fixing device of somatic part

Technical Field

The invention relates to the technical field of medical auxiliary instruments, in particular to a body part accurate radiotherapy fixing device and a using method thereof.

Background

In the medical field, patients often suffer from malignant tumors, the radiation therapy is used as one of the main treatment techniques, namely ionizing radiation, and is used for treating the malignant tumors and some benign diseases by using one or more ionizing radiations, about 70 percent of cancer patients need to be treated by radiation therapy in the process of treating the cancer, about 40 percent of cancers can be radically treated by radiation therapy, the role and the position of the radiation therapy in tumor treatment are increasingly highlighted, the radiation therapy becomes one of the most important means for treating the malignant tumors, namely the cancer therapy, and the radiation therapy is the only necessary treatment method for many cancer patients.

During radiotherapy, the radiotherapy doctor needs to fix the body position of a patient so as to ensure the accuracy of treatment, and to the radiotherapy of body tumors, the patient needs to be fixed, and the irradiated part is moved when the radiotherapy is prevented, so that the irradiated dose of normal tissues is reduced, and the target area is ensured to be sufficiently irradiated.

Radiotherapy position fixed accuracy, the direct decision radiotherapy effect, the plastic film is moulded including neck, chest abdomen to the membrane is moulded including the neck commonly used, and regard as the fixed benchmark of membrane repetition with bony sign or the mark of doing at the patient body surface, this kind of locate mode is accurate inadequately in the actual work, all has different displacements in all directions, can not effectively fix upper part of the body, both feet, influenced the holistic fixed of patient to a certain extent, also brought inconvenience for patient's repeated position every day is fixed simultaneously.

Disclosure of Invention

The invention aims to solve the problems that the positioning mode is not accurate enough, different displacements exist in all directions, the upper body and the feet cannot be effectively fixed, the overall fixation of a patient is influenced to a certain extent, and inconvenience is brought to the fixation of the patient in repeated body positions every day, and provides a body part accurate radiotherapy fixing device and a using method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

the fixing device for the precise radiotherapy of the body part comprises a bed body, wherein two sides of the upper end of the bed body are connected with fixing plates, a first air cylinder is connected onto the inner wall of each fixing plate, a first piston is connected in the first air cylinder in a sliding manner, a first spring is connected in the first air cylinder, one end, far away from the fixing plates, of the first piston is connected with a limiting plate, the upper end of the bed body is connected with a head placing plate, two symmetrical second air cylinders are fixedly connected onto one side, far away from the limiting plate, of the bed body, a second piston is connected in the second air cylinder in a sliding manner, a foot pedal is fixedly connected onto the upper end of the second piston, two matched foot sole limiting grooves are arranged on the foot pedal, a second spring is connected in the second air cylinder, a fixing box is arranged at the lower end of the bed body, one end, close to the fixing plates, in the fixing box, of the fixing box is fixedly connected with a third air cylinder, sliding connection has the third piston in the third inflator, be connected with the third spring in the third inflator, the one end that the third spring was kept away from to the third piston runs through in the bed body, and is connected with the back clamp plate, the one end that is close to the footboard of foot in the fixed incasement is connected with the fourth inflator, sliding connection has the fourth piston in the fourth inflator, be equipped with the fourth spring in the fourth inflator, the one end that the fourth spring was kept away from to the fourth piston runs through in the bed body, and is connected with the buttock clamp plate, meet through first trachea between third inflator and the first inflator, meet through the second trachea between fourth inflator and the second inflator.

Preferably, the head is placed and is connected with the air cushion through the gluing agent on the board, and per two are adjacent all meet through the third trachea between the first inflator, be connected with the fourth trachea on the first inflator that is close to air cushion one side on the bed body, the one end that first inflator was kept away from to the fourth trachea and the air inlet sealing connection of air cushion.

Preferably, all be equipped with the check valve in third trachea, the fourth trachea, the gas vent of air cushion is equipped with pressure protection valve.

Preferably, two be equipped with the fixed block between the second inflator, fixed connection between fixed block and the bed body, be connected with the threaded rod through the screw thread rotation in the fixed block, the one end that the fixed block was kept away from to the threaded rod runs through in the footboard of foot, and rotates and be connected with hollow section of thick bamboo, sliding connection between threaded rod and the footboard of foot, the threaded rod both sides are equipped with spacing hollow tube, the both ends of spacing hollow tube are connected with hollow section of thick bamboo, fixed block respectively.

Preferably, sliding connection has two symmetrical carriage release levers, two in the hollow section of thick bamboo be equipped with the supporting shoe between the carriage release lever, the inner wall fixed connection of supporting shoe and hollow section of thick bamboo, meet through the stretch cord between supporting shoe and the carriage release lever, be equipped with the relief valve on the hollow section of thick bamboo, the air inlet of spacing hollow tube is connected with the fifth trachea, the one end that spacing hollow tube was kept away from to the fifth trachea meets with the gas outlet of second inflator, the one end that the fixed block was kept away from to the spacing hollow tube runs through in hollow section of thick bamboo, be equipped with the check valve in the fifth trachea.

Preferably, the fixing plate is detachably connected with the bed body through a fixing bolt.

Preferably, the upper end of the bed body is provided with a groove matched with the back pressing plate and the hip pressing plate.

Preferably, the two sides of the lower end of the bed body are fixedly connected with supporting legs, and the lower ends of the supporting legs are fixedly connected with anti-skidding blocks.

A use method mainly comprises the following steps:

s1: firstly, the device is moved to the side of radiotherapy equipment and then fixed, so that the problem that the accuracy of radiotherapy is influenced and the patient is injured due to instability when the patient lies on the device is avoided;

s2: after the device is fixed, the medical care personnel can help the patient to stably lie on the bed body, wherein the bed body is provided with the rubber cushion, so that the patient can comfortably receive the radiotherapy, after the patient lies on the bed body, under the action of the back of the patient, the back pressure plate moves downwards, the back pressure plate moves the third piston downwards, the air in the third air cylinder is conveyed into the first air cylinder through the first air pipe, the first piston of the first air cylinder moves towards the patient under the pushing of the air, the limiting plate moves towards the patient, and finally the limiting plate is tightly attached to the two sides of the body of the patient, the patient is fixed, the patient is prevented from shaking due to excessive time of radiotherapy and dysphoria to influence the accuracy of the radiotherapy part, the sponge cushion is arranged on the surface of the limiting plate, so that the patient is prevented from feeling uncomfortable due to the excessive hardness of the limiting plate, and the comfort of the patient in radiotherapy is effectively improved;

s3: then, under the effect of patient's buttock, make the buttock clamp plate move down, the buttock clamp plate makes the fourth piston move down, and then carry the air in the fourth inflator in the second inflator through the second trachea, the second piston in the second inflator moves to patient's foot under the propelling movement of air, and then makes the footboard of foot also move to the patient, finally closely laminate with patient's sole closely, make patient's sole imbed the sole spacing groove in the footboard of taking the foot, fix patient's foot, prevent during radiotherapy, shake because of patient's foot, and drive the health and also shake thereupon, effectual improved the device and carried out fixed stability to the patient, make its radiotherapy equipment can carry out the accurate radiotherapy's effect to patient's affected part.

Compared with the prior art, the invention provides a body part accurate radiotherapy fixing device and a using method thereof, and the body part accurate radiotherapy fixing device has the following beneficial effects:

this accurate radiotherapy fixing device of somatic part and application method thereof through the setting of back clamp plate, buttock clamp plate, limiting plate, foot's footboard etc. can carry out comprehensive fixed to the patient, prevents when the radiotherapy, rocks and leads to the accuracy of radiotherapy to reduce because of patient's part, makes its radiotherapy equipment cause permanent damage to other positions of patient, the effectual accurate rate that has improved when carrying out the radiotherapy to the patient, reinforcing radiotherapy effect.

Drawings

Fig. 1 is a schematic structural view of a precise body radiotherapy fixing device and a method for using the same according to the present invention;

fig. 2 is a second structural schematic diagram of a body part precise radiotherapy fixing device and a use method thereof according to the present invention;

fig. 3 is a third structural schematic view of a body part precise radiotherapy fixing device and a use method thereof according to the present invention;

FIG. 4 is a fourth schematic structural view of a precise body radiotherapy fixing device and a method for using the same according to the present invention;

fig. 5 is a fifth structural schematic view of a precise body radiotherapy fixing device and a use method thereof according to the present invention;

fig. 6 is a schematic structural view of a part a in fig. 5 illustrating a precise body radiotherapy fixing device and a method for using the same according to the present invention;

fig. 7 is a schematic structural view of a precise body radiotherapy fixing device and a use method thereof according to the present invention, fig. 4 is a part B;

fig. 8 is a sixth schematic structural view of a precise body radiotherapy fixing device and a method for using the same according to the present invention;

fig. 9 is a partial perspective view of a precise body radiotherapy fixing device and a method for using the same according to the present invention.

In the figure: 1. a bed body; 2. a fixing plate; 3. a back pressing plate; 4. a hip press plate; 5. a limiting plate; 6. a first gas cylinder; 7. an air cushion; 8. a head placement plate; 9. a foot pedal; 10. A fixed block; 11. a second gas cylinder; 12. a second piston; 13. a first piston; 14. a stationary box; 15. a third gas cylinder; 16. a third spring; 17. a third piston; 18. a second spring; 19. A threaded rod; 20. limiting the hollow pipe; 21. a travel bar; 22. a third air pipe; 23. a fourth gas pipe; 25. a hollow cylinder; 26. an elastic cord; 27. a supporting block; 28. a first air pipe; 29. a fourth gas cylinder; 30. a fourth piston; 31. a fourth spring; 32. a second air pipe; 201. and (6) fixing the bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1:

referring to fig. 1-9, a fixing device for precise radiotherapy of body part and a using method thereof, comprising a bed body 1, wherein two sides of the upper end of the bed body 1 are connected with a fixing plate 2, the inner wall of the fixing plate 2 is connected with a first air cylinder 6, the first air cylinder 6 is connected with a first piston 13 in a sliding manner, one end of the first piston 13 far away from the fixing plate 2 is connected with a limit plate 5, the upper end of the bed body 1 is connected with a head placing plate 8, one side of the bed body 1 far away from the limit plate 5 is fixedly connected with two symmetrical second air cylinders 11, the second air cylinders 11 are connected with a second piston 12 in a sliding manner, the upper end of the second piston 12 is fixedly connected with a foot pedal 9, two matched foot palm limit grooves are arranged on the foot pedal 9, the second air cylinders 11 are connected with second springs 18, a fixing box 14 is arranged at the lower end of the bed body 1, one end of the fixing box 14 close to the fixing plate 2 is fixedly connected with a third air cylinder 15, a third piston 17 is connected in the third air cylinder 15 in a sliding manner, a third spring 16 is connected in the third air cylinder 15, one end, far away from the third spring 16, of the third piston 17 penetrates through the bed body 1 and is connected with a back pressing plate 3, one end, close to the foot pedal 9, in the fixing box 14 is connected with a fourth air cylinder 29, a fourth piston 30 is connected in the fourth air cylinder 29 in a sliding manner, a fourth spring 31 is arranged in the fourth air cylinder 29, one end, far away from the fourth spring 31, of the fourth piston 30 penetrates through the bed body 1 and is connected with a hip pressing plate 4, the third air cylinder 15 is connected with the first air cylinder 6 through a first air pipe 28, and the fourth air cylinder 29 is connected with the second air cylinder 11 through a second air pipe 32.

When the device is used, a user firstly moves the device to the side of radiotherapy equipment and then fixes the device, so that when a patient lies on the device, the accuracy of radiotherapy is prevented from being influenced and the patient is prevented from being hurt due to instability, after the device is fixed, medical staff assists the patient to stably lie on the bed body 1, wherein the bed body 1 is provided with a rubber cushion which can enable the patient to comfortably receive radiotherapy, after the patient lies on the bed body 1, the back pressing plate 3 moves downwards under the action of the back of the patient, the back pressing plate 3 enables the third piston 17 to move downwards, then air in the third air cylinder 15 is conveyed into the first air cylinder 6 through the first air pipe 28, the first piston 13 of the first air cylinder 6 moves towards the patient under the pushing of the air, and then the limiting plate 5 moves towards the patient, finally closely adheres to the two sides of the body of the patient, and fixes the patient, the device can prevent the patient from shaking due to the fact that the patient feels fidgety due to too long radiotherapy time and the accuracy of the radiotherapy part is influenced during radiotherapy, wherein the sponge pad is arranged on the surface of the limiting plate 5 to prevent the patient from feeling uncomfortable due to the fact that the limiting plate 5 is too hard, the comfort of the patient during radiotherapy is effectively improved, the hip press plate 4 moves downwards under the action of the hip of the patient, the hip press plate 4 enables the fourth piston 30 to move downwards, the air in the fourth air cylinder 29 is conveyed into the second air cylinder 11 through the second air pipe 32, the second piston 12 in the second air cylinder 11 moves towards the foot of the patient under the pushing of the air, the foot pedal 9 further moves towards the patient and is finally tightly attached to the sole of the patient, the sole of the patient is embedded into the sole limiting groove in the foot pedal 9 with the foot, the foot of the patient is fixed, and the shaking of the foot of the patient during radiotherapy is prevented, and drive the health and also take place thereupon and rock, the effectual stability that has improved the device and carry out fixing to the patient makes its radiotherapy equipment can carry out the effect of accurate radiotherapy to patient's affected part.

Example 2:

referring to fig. 1-9, a body precision radiotherapy fixing device and a using method thereof are substantially the same as embodiment 1, and further: the head is placed and is connected with air cushion 7 through the gluing agent on the board 8, all meet through third trachea 22 between per two adjacent first trachea 6, be connected with fourth trachea 23 on being close to the first trachea 6 of air cushion 7 one side on the bed body 1, the one end that first trachea 6 was kept away from to fourth trachea 23 and air cushion 7's air inlet sealing connection, through third trachea 22, the setting of fourth trachea 23, can be with in the first trachea 6 unnecessary gas row to air cushion 7, inflate air cushion 7, make patient's head can comfortable place on air cushion 7.

Example 3:

referring to fig. 1-9, a precise body radiotherapy fixing device and a using method thereof are substantially the same as embodiment 1, and further: third trachea 22, all be equipped with the check valve in the fourth trachea 23, the gas vent of air cushion 7 is equipped with pressure protection valve, setting through the check valve, when not having in first trachea 6 to gas, setting through the check valve, can effectually prevent the gaseous outflow in the first trachea 6, the fixed effect to the patient is influenced, when the gas in air cushion 7 is too much, setting through pressure protection valve, can discharge unnecessary gas, prevent that the air in the air cushion 7 is too much, bad air cushion 7 rises, cause the damage to the patient head, the effectual security that has improved the device.

Example 4:

referring to fig. 1-9, a precise body radiotherapy fixing device and a using method thereof are substantially the same as embodiment 1, and further: a fixing block 10 is arranged between the two second air cylinders 11, the fixing block 10 is fixedly connected with the bed body 1, a threaded rod 19 is connected in the fixing block 10 through thread rotation, one end, far away from the fixing block 10, of the threaded rod 19 penetrates through the foot pedal 9 and is rotatably connected with the hollow cylinder 25, the threaded rod 19 is in sliding connection with the foot pedal 9, limiting hollow pipes 20 are arranged on two sides of the threaded rod 19, two ends of each limiting hollow pipe 20 are respectively connected with the hollow cylinder 25 and the fixing block 10, when the foot of a user is embedded into the sole limiting groove, at the moment, the user rotates the threaded rod 19 to enable the hollow cylinder 25 to move towards the foot of the patient, finally the hollow cylinder is tightly attached to the foot surface of the patient, and the fixing block is fixed.

Example 5:

referring to fig. 1-9, a body precision radiotherapy fixing device and a using method thereof are substantially the same as embodiment 1, and further: two symmetrical moving rods 21 are connected in a hollow cylinder 25 in a sliding manner, a supporting block 27 is arranged between the two moving rods 21, the supporting block 27 is fixedly connected with the inner wall of the hollow cylinder 25, the supporting block 27 is connected with the moving rods 21 through an elastic rope 26, a pressure relief valve is arranged on the hollow cylinder 25, a fifth air pipe is connected with an air inlet of the limiting hollow pipe 20, one end, far away from the limiting hollow pipe 20, of the fifth air pipe is connected with an air outlet of a second air cylinder 11, one end, far away from a fixed block 10, of the limiting hollow pipe 20 penetrates through the hollow cylinder 25, a one-way valve is arranged in the fifth air pipe, when a patient lies on the bed body 1 and moves a hip press plate 4 downwards, a foot pedal 9 can move towards the direction of the patient, when the foot of the patient is tightly attached to the foot, redundant air can enter the limiting hollow pipe 20 through the fifth air pipe and then enter the hollow cylinder 25 to enable the moving rods 21 on the two sides to move outwards, thereby further fixing the feet of the patient and effectively improving the practicability of the device.

Example 6:

referring to fig. 1-9, a precise body radiotherapy fixing device and a using method thereof are substantially the same as embodiment 1, and further: can dismantle through gim peg 201 between the fixed plate 2 and the bed body 1 and be connected, through the setting of gim peg 201, the person of facilitating the use dismantles the transportation to the device.

Example 7:

referring to fig. 1-9, a precise body radiotherapy fixing device and a using method thereof are substantially the same as embodiment 1, and further: bed body 1 upper end be equipped with back clamp plate 3, buttock clamp plate 4 assorted recess, lie when the patient lies on bed body 1, back clamp plate 3, buttock clamp plate 4 can prevent that back clamp plate 3, buttock clamp plate 4 are protruding in the recess can advance under the decurrent effort of patient, make the patient feel uncomfortable, the effectual practicality that improves the device.

Example 8:

referring to fig. 1-9, a precise body radiotherapy fixing device and a using method thereof are substantially the same as embodiment 1, and further: the bed body 1 lower extreme both sides fixedly connected with supporting leg, supporting leg lower extreme fixedly connected with non slipping spur can support the bed body 1 through the setting of supporting leg, through the setting of non slipping spur, can improve the device's stability, and the person of facilitating the use uses.

According to the invention, the back pressing plate 3, the hip pressing plate 4, the limiting plate 5, the foot pedal 9 and the like are arranged, so that the patient can be comprehensively fixed, the reduction of the accuracy of radiotherapy caused by the local shaking of the patient during the radiotherapy is prevented, the radiotherapy equipment can permanently damage other parts of the patient, the accuracy of the radiotherapy on the patient is effectively improved, and the radiotherapy effect is enhanced.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides an accurate radiotherapy fixing device in somatic part, includes the bed body (1), its characterized in that, the upper end both sides of the bed body (1) are connected with fixed plate (2), be connected with first inflator (6) on fixed plate (2) inner wall, sliding connection has first piston (13) in first inflator (6), first spring is connected with in first inflator (6), the one end that fixed plate (2) were kept away from in first piston (13) is connected with limiting plate (5), bed body (1) upper end is connected with head and places board (8), fixedly connected with two symmetrical second inflator (11) on one side that limiting plate (5) were kept away from in bed body (1), sliding connection has second piston (12) in second inflator (11), second piston (12) upper end fixedly connected with foot footboard (9), be equipped with two assorted sole spacing grooves on foot footboard (9), the utility model discloses a bed, including first inflator (11), second spring (18) is connected in the second inflator (11), bed body (1) lower extreme is equipped with fixed case (14), one end fixedly connected with third inflator (15) that is close to fixed plate (2) in fixed case (14), sliding connection has third piston (17) in third inflator (15), third spring (16) is connected in third inflator (15), the one end that third spring (16) were kept away from in third piston (17) runs through in bed body (1), and is connected with back clamp plate (3), the one end that is close to foot footboard (9) in fixed case (14) is connected with fourth inflator (29), sliding connection has fourth piston (30) in fourth inflator (29), be equipped with fourth spring (31) in fourth inflator (29), the one end that fourth spring (31) was kept away from in fourth piston (30) runs through in bed body (1), the third air cylinder (15) is connected with the first air cylinder (6) through a first air pipe (28), and the fourth air cylinder (29) is connected with the second air cylinder (11) through a second air pipe (32);

a fixing block (10) is arranged between the two second air cylinders (11), the fixing block (10) is fixedly connected with the bed body (1), a threaded rod (19) is rotatably connected into the fixing block (10) through threads, one end, far away from the fixing block (10), of the threaded rod (19) penetrates through the foot pedal (9) and is rotatably connected with the hollow cylinder (25), the threaded rod (19) is slidably connected with the foot pedal (9), limiting hollow tubes (20) are arranged on two sides of the threaded rod (19), and two ends of each limiting hollow tube (20) are respectively connected with the hollow cylinder (25) and the fixing block (10);

when in use, the device is moved to the side of radiotherapy equipment and then fixed, so that the problem that the accuracy of radiotherapy is influenced and the patient is injured due to instability when the patient lies on the device is avoided;

after the device is fixed, a medical staff assists a patient to lie on the bed body (1) stably, wherein the bed body (1) is provided with a rubber cushion which can enable the patient to receive radiotherapy comfortably, the patient lies on the bed body (1) and then moves the back pressure plate (3) downwards under the action of the back of the patient, the back pressure plate (3) enables the third piston (17) to move downwards, further air in the third air cylinder (15) is conveyed into the first air cylinder (6) through the first air pipe (28), the first piston (13) of the first air cylinder (6) moves towards the patient under the pushing of the air, further the limiting plate (5) moves towards the patient and finally clings to the two sides of the body of the patient tightly to fix the patient, and the situation that the patient shakes due to long-time dysphoria during radiotherapy to influence the accuracy of the radiotherapy part is prevented, wherein the surface of the limiting plate (5) is provided with a sponge cushion, the discomfort of the patient caused by the over-hardness of the limiting plate (5) is prevented, and the comfort of the patient receiving the radiotherapy is effectively improved;

then, under the action of the patient's buttocks, the buttocks pressing plate (4) moves downwards, the buttocks pressing plate (4) moves the fourth piston (30) downwards, further the air in the fourth air cylinder (29) is conveyed into the second air cylinder (11) through the second air pipe (32), the second piston (12) in the second air cylinder (11) moves towards the patient's feet under the pushing of the air, further the foot pedal (9) moves towards the patient, finally the second piston is tightly attached to the soles of the patient, the soles of the patient are embedded into the sole limiting grooves in the foot pedal (9) with the feet, the feet of the patient are fixed, the situation that the body of the patient shakes along with the feet during radiotherapy is prevented, the stability of the device for fixing the patient is effectively improved, and the device can perform precise radiotherapy on the affected part of the patient.

2. The precise radiotherapy fixing device for body part according to claim 1, wherein the head placing plate (8) is connected with an air cushion (7) through adhesive, every two adjacent first air cylinders (6) are connected through a third air pipe (22), the first air cylinder (6) on one side close to the air cushion (7) on the bed body (1) is connected with a fourth air pipe (23), and one end of the fourth air pipe (23) far away from the first air cylinder (6) is connected with the air inlet of the air cushion (7) in a sealing manner.

3. The precise radiotherapy fixture of claim 2, characterized in that the third and fourth air pipes (22, 23) are provided with one-way valves, and the air outlet of the air cushion (7) is provided with a pressure protection valve.

4. The fixing device for precise radiotherapy of body part according to claim 1, wherein two symmetrical moving rods (21) are slidably connected in the hollow cylinder (25), a supporting block (27) is arranged between the two moving rods (21), the supporting block (27) is fixedly connected with the inner wall of the hollow cylinder (25), the supporting block (27) is connected with the moving rods (21) through elastic ropes (26), a pressure release valve is arranged on the hollow cylinder (25), a fifth air pipe is connected with the air inlet of the hollow limiting pipe (20), one end of the fifth air pipe, far away from the hollow limiting pipe (20), is connected with the air outlet of the second air cylinder (11), one end of the hollow limiting pipe (20), far away from the fixing block (10), penetrates through the hollow cylinder (25), and a one-way valve is arranged in the fifth air pipe.

5. The radiotherapy fixing device for precise body part according to claim 1, wherein the fixing plate (2) is detachably connected with the bed body (1) through a fixing bolt (201).

6. The precise radiotherapy fixing device for body part according to claim 1, characterized in that the upper end of the bed body (1) is provided with a groove matched with the back pressing plate (3) and the hip pressing plate (4).

7. The precise radiotherapy fixing device for body part according to any one of claims 1 to 6, wherein supporting legs are fixedly connected to two sides of the lower end of the bed body (1), and anti-skidding blocks are fixedly connected to the lower ends of the supporting legs.