Auxiliary device for close-range radiotherapy of cervix uteri
By designing auxiliary devices for cervical cancer, using needle tracts and clamping mechanisms to ensure accurate insertion of implant needles, the problem of difficulty in placement of implant needles and unsatisfactory radiotherapy in the treatment of close-range implantation of cervical cancer is solved, and the problem of unsatisfactory needle arrangement and radiotherapy effect is achieved More efficient radiotherapy effects.
Patent Information
- Application Number
- CN202411431059.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2024-12-06
AI Technical Summary
In the treatment of close implantation of cervical cancer, the arrangement of implant needles is difficult and disorderly, making it difficult to achieve reasonable distribution and accurate insertion orientation and depth, resulting in unsatisfactory radiotherapy effect.
An auxiliary device including a front fixing plate, a rear fixing plate and a connecting column is designed, and a plurality of needle channels are arranged to guide the insertion needle. The insertion needle is clamped with an elastic plate and a driving member to ensure that it is in the preset direction and Deeply insert the target area, combining the rotating screw and sliding drive plate mechanism to prevent the insertion needle from moving and deflecting.
The precise insertion of implant needles is achieved, the radiotherapy effect is improved, the inner wall of the vagina is protected, the stability of implant needles and the accuracy of radiotherapy is ensured, and the effect of radiotherapy is enhanced.
Smart Images
Figure CN119075213A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of medical equipment, and in particular to an auxiliary device for cervical brachytherapy. Background Art
[0002] Cervical cancer is one of the major issues in women's health worldwide. Brachytherapy, as a common treatment method, is crucial for patients with early or mid-stage cervical cancer. In brachytherapy, the applicator is a device that positions radioactive substances around the patient's cervix to irradiate the tumor. Using an implant needle as an applicator allows the radiation source to directly enter the lesion area, increasing the radiotherapy dose in the lesion area without increasing damage to surrounding normal tissues. In theory, the best radiotherapy effect can be obtained. In previous brachytherapy for cervical cancer, since the target area is inside the patient's body, it is difficult to arrange the implant needle clinically. The implant needles are all blindly inserted, and the implant needles are disordered, making it difficult to achieve a reasonable distribution and accurate insertion direction and insertion depth, resulting in unsatisfactory radiotherapy effects. Summary of the invention
[0003] The technical problem to be solved by the present invention is to provide an auxiliary device for cervical brachytherapy to solve the problem in the above-mentioned background technology that the arrangement of insertion needles in the existing brachytherapy for cervical cancer is difficult, the insertion needles are disorderly, it is difficult to achieve a reasonable distribution and accurate insertion direction and insertion depth, resulting in unsatisfactory radiotherapy effect.
[0004] In order to solve the above technical problems, a basic solution adopted by the present invention is: an auxiliary device for cervical close-range radiotherapy, including a front fixing plate located in the patient's vagina during radiotherapy, a rear fixing plate located outside the patient's body, and a connecting column that fixes the front fixing plate to the rear fixing plate, and the front fixing plate and the rear fixing plate are cooperatively provided with a plurality of needle channels for insertion needles to penetrate and be inserted into the target tissue in the patient's body.
[0005] In the above basic scheme, the shape of the front fixation plate is determined according to the position and size of the patient's tumor and the shape and size of the patient's vaginal cavity. The radiotherapy points are reasonably set according to the position and size of the target area. Needle channels corresponding to the radiotherapy points are cooperatively set on the front fixation plate and the rear fixation plate. When the implantation needle is inserted through the corresponding needle channel, the front end of the implantation needle can be inserted into the tissue of the preset radiotherapy point at the target area according to the preset implantation direction and implantation depth, so as to achieve the purpose of precise radiotherapy and improve the radiotherapy effect.
[0006] Furthermore, the needle track includes a horizontal needle track whose axis is parallel to the axis of the connecting column and an oblique needle track whose axis intersects the axis of the connecting column.
[0007] Furthermore, the flat needle channel includes a front flat needle channel arranged on the front fixing plate and a rear flat needle channel arranged on the rear fixing plate, and the oblique needle channel includes a front oblique needle channel arranged on the front fixing plate and a rear oblique needle channel arranged on the rear fixing plate.
[0008] Furthermore, the rear fixing plate is provided with a clamping member 1 for clamping the implantation needle in the rear flat needle channel and a clamping member 2 for clamping the implantation needle in the rear oblique needle channel, and a driving member is provided on the rear fixing plate for forcing the clamping member 1 and the clamping member 2 to contract to clamp the corresponding implantation needle.
[0009] Further, the clamping member 1 and the clamping member 2 are both arranged on the end surface of the rear fixing plate close to the front fixing plate, the clamping member 1 includes a plurality of elastic plates 1 uniformly distributed around the axis of the rear flat needle channel, one end of the elastic plate 1 is fixedly connected to the rear fixing plate, the other end of the elastic plate 1 is a free end, the outer wall of the elastic plate 1 is arranged to be an incomplete cone surface that gradually shrinks toward the direction close to the front fixing plate toward the axis of the rear flat needle channel, the clamping member 2 includes a plurality of elastic plates 2 uniformly distributed around the axis of the rear oblique needle channel, one end of the elastic plate 2 The elastic plate 2 is fixedly connected to the rear fixing plate, and the other end of the elastic plate 2 is a free end. The outer wall of the elastic plate 2 is arranged as an incomplete cone surface which gradually shrinks toward the axis of the rear oblique needle channel in the direction approaching the front fixing plate. When the driving member is driven to move toward the rear fixing plate, the driving member forces the free end of the elastic plate 1 to shrink toward the axis of the rear flat needle channel to clamp the implant needle in the rear flat needle channel, and forces the free end of the elastic plate 2 to shrink toward the axis of the rear oblique needle channel to clamp the implant needle in the rear oblique needle channel.
[0010] Furthermore, the driving member includes a driving plate which is sleeved outside the connecting column and slidably connected to the connecting column, the driving plate is provided with a conical hole 1 which cooperates with the outer wall of the elastic plate 1 and a conical hole 2 which cooperates with the outer wall of the elastic plate 2, the rear fixed plate is symmetrically provided with threaded through holes whose axes are parallel to the axis of the connecting column, the driving plate is provided with a screw which cooperates with the threaded through holes, one end of the screw is rotatably connected to the driving plate, and the other end of the screw is located on the side of the rear fixed plate away from the driving plate.
[0011] When placing the implantation needle, the screw is rotated to make the driving plate move away from the rear fixing plate so that the inner wall of the tapered hole one does not squeeze the outer wall of each elastic plate one, and the channel formed by the inner wall of each elastic plate one can allow the implantation needle in the rear flat needle channel to pass freely, and the inner wall of the tapered hole two does not squeeze the outer wall of each elastic plate two, and the channel formed by the inner wall of each elastic plate two can allow the implantation needle in the rear oblique needle channel to pass freely. After the implantation needle is inserted into place, the screw is rotated to make the driving plate close to the rear fixing plate so that the tapered hole one squeezes the outer wall of each elastic plate one, so that the channel formed by the inner wall of each elastic plate one shrinks and clamps the implantation needle in the rear flat needle channel, and the implantation needle in the rear flat needle channel is restricted from moving and rotating, and at the same time, the tapered hole two squeezes the outer wall of each elastic plate two, so that the channel formed by the inner wall of each elastic plate two shrinks and clamps the implantation needle in the rear oblique needle channel, and the implantation needle in the rear oblique needle channel is restricted from moving and rotating.
[0012] Furthermore, the driving plate is provided with a through hole corresponding to the rear oblique needle channel, and a slide groove cross-connected with the through hole is provided in the driving plate along the radial direction of the connecting column, a slide plate is slidably connected in the slide groove, and the second conical hole is provided on the slide plate.
[0013] Since the axis of the rear oblique needle channel intersects with the axis of the connecting column, when the driving plate approaches the rear fixing plate along the axis of the connecting column, the inner wall of the second conical hole cannot evenly contact the outer wall of each elastic plate and squeeze the second elastic plate, which may cause each elastic plate to fail to simultaneously contract and clamp the implant needle in the rear oblique needle channel, thereby causing the implant needle to move and deflect, and ultimately causing the head of the implant needle to fail to be located at the preset radiotherapy point in the correct orientation and depth, and ultimately failing to achieve the preset radiotherapy effect. The slide plate slides upward and sets the conical hole 2 on the slide plate. When the driving plate approaches the rear fixed plate along the axial direction of the connecting column, the inner wall of the conical hole 2 is subjected to the comprehensive feedback force of the outer wall of each elastic plate 2 to force the slide plate to slide in the slide groove to change the position of the conical hole 2, so that the inner wall of the conical hole 2 can evenly squeeze the outer wall of each elastic plate 2, so that each elastic plate 2 can synchronously contract and press the implant needle in the rear oblique needle channel, thereby preventing the implant needle in the rear oblique needle channel from moving and deflecting due to uneven force on each elastic plate 2.
[0014] Furthermore, the front end surface of the front fixing plate is configured as an arc-shaped surface.
[0015] Furthermore, the rear fixing plate is provided with a mounting hole connected to a fixing frame of an external device.
[0016] Furthermore, a silicone layer is provided on the outer peripheral surface of the rear fixing plate.
[0017] Compared with the prior art that adopts blind insertion to arrange the implant needle, the auxiliary device using this solution has at least the following beneficial effects:
[0018] 1. In this solution, the front fixation plate is customized according to the location and size of the patient's tumor and the shape of the patient's vaginal cavity. When the front fixation plate is placed in the preset position, it can reasonably stretch the patient's vaginal inner wall, which is beneficial to protect the normal tissue of the vaginal inner wall during radiotherapy. The front fixation plate can reasonably fit the patient's vaginal inner wall to improve the stability of the front end of the implant needle.
[0019] 2. In this scheme, multiple needle channels with different directions are set according to the patient's condition, which can achieve close-range irradiation of the target tissue at different directions and points, further improving the radiotherapy effect.
[0020] 3. In this solution, the inner diameter of each needle channel is set to be larger than the outer diameter of the implant needle to facilitate the insertion and removal of the implant needle.
[0021] 4. In this solution, the driving plate is arranged to cooperate with the clamping member 1 and the clamping member 2 to clamp the implant needle to prevent the implant needle from moving or deflecting during radiotherapy. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0023] Figure 1 It is a structural schematic diagram of the auxiliary device for cervical brachytherapy of the present invention in the front view direction.
[0024] Figure 2 for Figure 1 Enlarged view of part A in the middle.
[0025] Figure 3 The diagram shows the matching between the drive plate and the rear fixed plate. Figure 1 .
[0026] Figure 4 The diagram shows the matching between the drive plate and the rear fixed plate. Figure 2 .
[0027] The meanings of the symbols in the accompanying drawings are:
[0028] Front fixing plate-10; front flat needle channel-101; front oblique needle channel-102;
[0029] Rear fixing plate-20; rear flat needle channel-201; rear oblique needle channel-202; threaded through hole-203; mounting hole-204;
[0030] Connecting column-30; elastic plate one-301; elastic plate two-302;
[0031] Driving plate-40; tapered hole 1-401; tapered hole 2-402; screw-403; through hole-404; slide groove-405;
[0032] Skateboard - 50;
[0033] Implant needle-60. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.
[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0036] An auxiliary device for cervical brachytherapy in this embodiment, such as Figure 1-Figure 4 As shown, it includes a front fixing plate 10 located in the patient's vagina during radiotherapy, a rear fixing plate 20 located outside the patient's body, and a connecting column 30 that fixes the front fixing plate 10 to the rear fixing plate 20. The front fixing plate 10 and the rear fixing plate 20 are cooperatively provided with a plurality of needle channels for the insertion needle 60 to pass through and be inserted into the target tissue in the patient's body.
[0037] The front fixing plate 10 is a support body customized according to the shape of the patient's vaginal cavity and the location and size of the tumor. It is used to reasonably open the patient's vaginal inner wall when the front fixing plate 10 is placed in a preset position during radiotherapy, which is beneficial to protect the normal tissue of the vaginal inner wall during radiotherapy. The front fixing plate 10 can reasonably fit the patient's vaginal inner wall to improve the stability of the front end of the implant needle. In order to avoid the fixing plate from damaging the patient's vaginal inner wall when the front fixing plate 10 is placed in the preset position, the front end surface of the front fixing plate 10 is set as an arc surface. One end of the connecting column 30 is fixedly connected to the front fixing plate 10, and the other end of the connecting column 30 is fixedly connected to the rear fixing plate 20.
[0038] Combination Figure 2 , Figure 3 As shown, the needle channel includes a horizontal needle channel whose axis is parallel to the axis of the connecting column 30 and an oblique needle channel whose axis intersects the axis of the connecting column 30. The horizontal needle channel includes a front horizontal needle channel 101 arranged on the front fixing plate 10 and a rear horizontal needle channel 201 arranged on the rear fixing plate 20. The oblique needle channel includes a front oblique needle channel 102 arranged on the front fixing plate 10 and a rear oblique needle channel 202 arranged on the rear fixing plate 20.
[0039] like Figure 3 , Figure 4 As shown, the rear fixing plate 20 is provided with an elastic clamping member 1 for clamping the insertion needle 60a in the rear flat needle channel 201 and an elastic clamping member 2 for clamping the insertion needle 60b in the rear oblique needle channel 202. The rear fixing plate 20 is provided with a driving member for forcing the clamping member 1 and the clamping member 2 to contract to clamp the corresponding insertion needle. The clamping member 1 and the clamping member 2 are both arranged on the end surface of the rear fixing plate 20 close to the front fixing plate 10. The clamping member 1 includes a plurality of elastic clamping members surrounding the rear flat needle channel 201. The elastic plates 301 are evenly distributed along the axis of the needle channel 201, and gaps are set between adjacent elastic plates 301. The inner wall of the elastic plate 301 is set as an arc surface that cooperates with the outer wall of the corresponding implant needle 60a after being compressed by the driving member. One end of the elastic plate 301 is fixedly connected to the rear fixed plate 20, and the other end of the elastic plate 301 is a free end. The outer wall of the elastic plate 301 is set as an incomplete cone surface that gradually shrinks toward the direction of the axis of the rear flat needle channel 201 toward the direction close to the front fixed plate 10. The clamping member 2 includes a plurality of elastic plates 302 evenly distributed around the axis of the rear oblique needle channel 202, and gaps are set between adjacent elastic plates 302. The inner wall of the elastic plate 302 is set as an arc surface that is retracted by the driving plate 40 and cooperates with the outer wall of the corresponding implant needle 60b. One end of the elastic plate 302 is fixedly connected to the rear fixing plate 20, and the other end of the elastic plate 302 is a free end. The outer wall of the elastic plate 302 is set as an incomplete cone surface that gradually shrinks toward the axis of the rear oblique needle channel 202 in the direction close to the front fixing plate 10.
[0040] When the driving member is driven to move toward the rear fixing plate 20, the driving member forces the free end of the elastic plate 1 301 to contract toward the axial direction of the rear flat needle channel 201 to clamp the insertion needle 60a in the rear flat needle channel 201, and forces the free end of the elastic plate 2 302 to contract toward the axial direction of the rear oblique needle channel 202 to clamp the insertion needle 60b in the rear oblique needle channel 202. The rear fixing plate 20 is provided with a mounting hole 204 connected to an external fixing frame. When the front fixing plate 10 is placed at a predetermined position in the patient's vagina, the rear fixing plate 20 is fixedly connected to the external fixing frame through the mounting hole 204 to keep the entire auxiliary device stable. A silicone layer is provided on the outer peripheral surface of the rear fixing plate 20.
[0041] like Figure 3 , Figure 4As shown, the driving member includes a driving plate 40 which is sleeved outside the connecting column 30 and is slidably connected to the connecting column 30, and the driving plate 40 is provided with a conical hole 1 401 which cooperates with the outer wall of the elastic plate 1 301 and a conical hole 2 402 which cooperates with the outer wall of the elastic plate 2 302, and the rear fixing plate 20 is symmetrically provided with threaded through holes 203 whose axes are parallel to the axes of the connecting column 30, and the driving plate 40 is provided with a screw 403 which cooperates with the threaded through holes 203, and one end of the screw 403 is connected to the driving The plate 40 is rotatably connected, and the other end of the screw 403 passes through the threaded through hole 203 and is located on the side of the rear fixed plate 20 away from the driving plate 40. The driving plate 40 is provided with a through hole 404 corresponding to the rear oblique needle channel 202, and the diameter of the through hole 404 is larger than the maximum inner diameter of the tapered hole 402. A slide groove 405 cross-connected with the through hole 404 is provided in the driving plate 40 along the radial direction of the connecting column 30, and the slide plate 50 is slidably connected in the slide groove 405, and the tapered hole 402 is provided on the slide plate 50.
[0042] When the present solution is used, after the front fixing plate 10 is placed at a preset position in the patient's vagina, the rear fixing plate 20 is fixedly connected to the external fixing frame to maintain the stability of the entire auxiliary device. When the implantation needle is placed, the screw 403 is rotated to make the driving plate 40 away from the rear fixing plate 20 so that the inner wall of the conical hole 1 401 does not squeeze the outer wall of each elastic plate 1 301. The channel formed by the inner wall of each elastic plate 1 301 can allow the implantation needle 60a in the rear flat needle channel 201 to pass freely, and the inner wall of the conical hole 2 402 does not squeeze the outer wall of each elastic plate 2 The outer wall of each elastic plate 302 and the channel formed by the inner walls of each elastic plate 302 can allow the implantation needle 60b in the rear oblique needle channel 202 to pass freely. After each implantation needle is inserted into place, the screw rod 403 is rotated to move the drive plate 40 toward the rear fixed plate 20 so that the tapered hole 401 squeezes the outer wall of each elastic plate 301 so that the channel formed by the inner walls of each elastic plate 301 shrinks and clamps the implantation needle 60a in the rear flat needle channel 201, and the implantation needle 60a in the rear flat needle channel 201 is restricted from moving and rotating.
[0043] Since the axis of the rear oblique needle channel 202 intersects with the axis of the connecting column 30 in space, when the driving plate 40 approaches the rear fixing plate 20 along the axis of the connecting column 30, the inner wall of the second conical hole 402 cannot evenly contact the outer wall of each elastic plate 302 and squeeze the elastic plate 302, which may cause each elastic plate 302 to be unable to simultaneously contract and clamp the implant needle in the rear oblique needle channel 202, thereby causing the implant needle to move and deflect and ultimately causing the head of the implant needle to be unable to be located at the preset radiotherapy point in the correct orientation and depth, and ultimately failing to achieve the preset radiotherapy effect. A slide plate 50 that can slide in the radial direction of the connecting column 30 is provided and the second conical hole 402 is provided on the slide plate 50, such as Figure 4As shown, when the screw 403 is rotated to drive the plate 40 to approach the rear fixed plate 20 along the axial direction of the connecting column 30, the inner wall of the tapered hole 402 is subjected to the comprehensive feedback force of the outer walls of each elastic plate 302 to force the slide plate 50 to slide in the slide groove 405 to change the position of the tapered hole 402, thereby allowing the inner wall of the tapered hole 402 to evenly squeeze the outer walls of each elastic plate 302 so that each elastic plate 302 can synchronously contract and press the implant needle 60b in the rear oblique needle channel 202, thereby preventing the implant needle 60b in the rear oblique needle channel 202 from moving and rotating due to uneven force on each elastic plate 302.
[0044] The above are only embodiments of the present invention, and the common knowledge such as the known specific structures and characteristics in the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. An auxiliary device for cervical brachytherapy, characterized in that: It includes a front fixing plate located in the patient's vagina during radiotherapy, a rear fixing plate located outside the patient's body, and a connecting column that fixes the front fixing plate to the rear fixing plate. The front fixing plate and the rear fixing plate are cooperatively provided with a plurality of needle channels for the insertion needles to pass through and be inserted into the target tissue in the patient's body.
2. The auxiliary device for cervical brachytherapy according to claim 1, characterized in that: The needle track includes a horizontal needle track whose axis is parallel to the axis of the connecting column and an oblique needle track whose axis intersects the axis of the connecting column.
3. The auxiliary device for cervical brachytherapy according to claim 2, characterized in that: The flat needle track includes a front flat needle track arranged on the front fixing plate and a rear flat needle track arranged on the rear fixing plate, and the oblique needle track includes a front oblique needle track arranged on the front fixing plate and a rear oblique needle track arranged on the rear fixing plate.
4. The auxiliary device for cervical brachytherapy according to claim 3, characterized in that: The rear fixing plate is provided with a clamping member 1 for clamping the implantation needle in the rear flat needle channel and a clamping member 2 for clamping the implantation needle in the rear oblique needle channel, and a driving member for forcing the clamping member 1 and the clamping member 2 to contract to clamp the corresponding implantation needle is provided on the rear fixing plate.
5. The auxiliary device for cervical brachytherapy according to claim 4, characterized in that: The clamping member 1 and the clamping member 2 are both arranged on the end surface of the rear fixing plate close to the front fixing plate, the clamping member 1 includes a plurality of elastic plates 1 uniformly distributed around the axis of the rear flat needle channel, one end of the elastic plate 1 is fixedly connected to the rear fixing plate, the other end of the elastic plate 1 is a free end, the outer wall of the elastic plate 1 is arranged to be an incomplete cone surface which gradually shrinks toward the direction close to the front fixing plate toward the axis of the rear flat needle channel, the clamping member 2 includes a plurality of elastic plates 2 uniformly distributed around the axis of the rear oblique needle channel, one end of the elastic plate 2 is fixedly connected to the rear fixing plate, the other end of the elastic plate 1 is a free end, the outer wall of the elastic plate 1 is arranged to be an incomplete cone surface which gradually shrinks toward the direction close to the front fixing plate toward the axis of the rear flat needle channel, The rear fixing plate is fixedly connected, the other end of the elastic plate 2 is a free end, and the outer wall of the elastic plate 2 is arranged as an incomplete cone surface which gradually shrinks toward the axis of the rear oblique needle channel in the direction approaching the front fixing plate. When the driving member is driven to move in the direction approaching the rear fixing plate, the driving member forces the free end of the elastic plate 1 to shrink toward the axis of the rear flat needle channel to clamp the implant needle in the rear flat needle channel, and forces the free end of the elastic plate 2 to shrink toward the axis of the rear oblique needle channel to clamp the implant needle in the rear oblique needle channel.
6. The auxiliary device for cervical brachytherapy according to claim 5, characterized in that: The driving member includes a driving plate which is sleeved outside the connecting column and is slidably connected to the connecting column. The driving plate is provided with a conical hole 1 which cooperates with the outer wall of the elastic plate 1 and a conical hole 2 which cooperates with the outer wall of the elastic plate 2. The rear fixed plate is symmetrically provided with threaded through holes whose axes are parallel to the axis of the connecting column. The driving plate is provided with a screw which cooperates with the threaded through holes. One end of the screw is rotatably connected to the driving plate, and the other end of the screw is located on a side of the rear fixed plate away from the driving plate.
7. The auxiliary device for cervical brachytherapy according to claim 6, characterized in that: The driving plate is provided with a through hole corresponding to the rear oblique needle track, and a slide groove cross-connected with the through hole is provided in the driving plate along the radial direction of the connecting column, a slide plate is slidably connected in the slide groove, and the second conical hole is provided on the slide plate.
8. The auxiliary device for cervical brachytherapy according to claim 1, characterized in that: The front end surface of the front fixing plate is configured as an arc-shaped surface.
9. The auxiliary device for cervical brachytherapy according to claim 1, characterized in that: The rear fixing plate is provided with a mounting hole connected to a fixing frame of an external device.
10. The auxiliary device for cervical brachytherapy according to claim 1, characterized in that: A silicone layer is arranged on the outer peripheral surface of the rear fixing plate.