Gynecological tumor radiotherapy source applicator for navigation positioning calibration

Abstract

The invention discloses a gynecological tumor radiotherapy source applicator for navigation, positioning and calibration, and relates to the field of biomedical engineering, the gynecological tumor radiotherapy source applicator comprises a radioactive source catheter body, and the outer side of the lower end of the radioactive source catheter body is in threaded connection with a threaded guide piece; an arc-shaped groove is formed in the upper end of the threaded guide piece, the threaded guide piece is in nested butt joint with a butt joint nesting rod through the arc-shaped groove, and a bearing limiting piece is arranged on the outer side of the upper end of the radioactive source catheter body. According to the gynecological tumor radiotherapy source applicator for navigation, positioning and calibration, the guiding bearing structure is arranged, positioning and calibration processing is carried out on the placement position of the radioactive source catheter body through the guiding bearing structure, deviation of the treatment part is prevented, auxiliary positioning processing can be carried out according to the internal structure of the human body during treatment after placement, and the treatment accuracy is improved. The overall conformity is higher, the defects of non-uniform dose distribution and the like are avoided, and the treatment distribution uniformity is ensured.

Description

Technical Field

[0001] This invention relates to the field of biomedical engineering technology, specifically to a gynecological tumor radiotherapy applicator for navigation and positioning calibration. Background Technology

[0002] Biomedical engineering, as an engineering field that addresses life and health issues, has profound significance in applications such as gynecological tumor radiotherapy. Among these applications, the gynecological tumor radiotherapy applicator is the core device for achieving precise brachytherapy. By placing the radiation source directly into or close to the tumor target area, and utilizing the physical property that the dose decreases sharply with distance, it is possible to deliver an extremely high dose to the tumor while maximally protecting surrounding normal organs such as the rectum and bladder. For example, the patent CN120204642A discloses an automatic post-expansion multi-channel brachytherapy applicator for gynecological tumors, comprising a central radiation source catheter, radiation source catheter leaflets, a linkage device, a post-expansion knob, and a fixing handle. The central radiation source catheter has a fixing handle at its bottom; the fixing handle has a post-expansion knob at its upper part; the post-expansion knob is connected to the linkage device; the linkage device has radiation source catheter leaflets; and the radiation source catheter leaflets have insertion needle holes. Advantages: When not in use for expansion, the applicator is small in size, making it easy to insert into the vagina. For example, the patent with announcement number CN111840827B describes an adjustable gynecological brachytherapy applicator for cervical cancer. This addresses the problem that existing technologies cannot adapt to various vaginal environments in cervical cancer patients, easily causing errors in radiotherapy dosage, leading to tumor control failure and increased side effects. The applicator includes an intermediate connecting frame consisting of a connecting frame body. An applicator bend is inserted into the bend mounting hole at the upper end of the intermediate connecting frame. The left and right hemispheres of the oval body are symmetrically arranged on both sides of the intermediate connecting frame, each consisting of a hemispherical shell. Concave cavities are provided on opposite sides of the two hemispherical shells. For example, patent CN121016086A discloses a fixator for a gynecological tumor applicator, which belongs to gynecological radiotherapy equipment. It includes a fixation component, a first limiting component, and a second limiting component. The fixation component includes a fixation strap and an airbag. The two ends of the fixation strap can be glued together, and airbags are symmetrically arranged on the inner side of the fixation strap. The first limiting component includes a ball seat, a limiting rod, a connecting rod, and an elastic limiting pad. The two ends of the limiting rod are connected to the ball seat, which is connected to the fixation strap. The connecting rod is oscillatingly mounted on the ball seat and is perpendicular to the limiting rod. The bottom of the connecting rod is connected to the elastic limiting pad. The second limiting component includes a guide rod and a limiting bracket. Most of the existing technologies mentioned above improve the overall structure. However, the existing gynecological tumor radiotherapy applicators are mostly fixed in their placement state during operation. They cannot be positioned according to the internal structure of the human body after placement, resulting in poor conformity, underdose in some target areas, uneven dose distribution, and other defects, thus limiting their use. Summary of the Invention

[0003] The purpose of this invention is to provide a gynecological tumor radiotherapy applicator with navigation and positioning calibration, in order to solve the problems mentioned in the background art, which are mostly fixed placement structures, and cannot be used for auxiliary positioning processing according to the internal structure of the human body during treatment after placement, resulting in low conformity, underdose in some target areas, and uneven dose distribution.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a gynecological tumor radiotherapy applicator for navigation and positioning calibration, comprising a radiotherapy source catheter body, wherein a threaded guide is threadedly connected to the lower outer side of the radiotherapy source catheter body; an arc-shaped groove is provided at the upper end of the threaded guide, and a mating nesting rod is nested between the threaded guide and the arc-shaped groove; a load-bearing limiting member is provided at the upper outer side of the radiotherapy source catheter body; and a guide bearing structure is provided between the radiotherapy source catheter body and the load-bearing limiting member, wherein the position of the radiotherapy source catheter body is positioned and calibrated by the guide bearing structure.

[0005] Furthermore, the guiding and supporting structure is provided with a built-in docking liquid bladder component, which is located on the outside of the radiation source conduit body. A docking pre-reservation part is fixedly connected to the outside of the docking nesting rod, and the docking pre-reservation part is located at the lower end of the built-in docking liquid bladder component. A supply hose is docked to the outside of the built-in docking liquid bladder component.

[0006] Furthermore, the lower outer end of the bearing limiting member is nested with a built-in bearing liquid bladder component, and the outer side of the built-in bearing liquid bladder component is connected to an external protective liquid bladder component, and the external protective liquid bladder component is connected to the outer side of the bearing limiting member. The built-in bearing liquid bladder component is connected to the supply hose. The outer side of the bearing limiting member is fixedly connected to an abutting docking member, and the abutting docking member is nested and connected to the inner side of the upper end of the radiation source catheter body. The lower end of the abutting docking member corresponds to the upper end of the docking nesting rod. The upper end of the abutting docking member is connected to a first return spring, and the outer side of the first return spring is connected to the inner side of the radiation source catheter body.

[0007] Furthermore, as the threaded guide moves upward along the outer thread of the radiation source conduit body, it pushes the nested docking rod to move vertically along the outer side of the radiation source conduit body. The nested docking rod applies outward pressure to the contacting docking member, and the contacting docking member drives the bearing limiting member to move outward along the outer side of the radiation source conduit body.

[0008] Furthermore, the docking nesting rod applies vertical pressure to the built-in docking liquid bladder component through the docking pre-reserved part, and the built-in docking liquid bladder component provides supply to the built-in bearing liquid bladder component and the external protective liquid bladder component through the supply hose.

[0009] Furthermore, an isolation and protection structure is provided on the inner side of the upper end of the radiation source conduit body to avoid affecting the insertion process of the radiation source conduit body; the isolation and protection structure is provided with a docking steel wire rope component, and the docking steel wire rope component is docked with the outer side of the abutting docking part, and the docking steel wire rope component runs through the inner side of the radiation source conduit body.

[0010] Furthermore, a transverse reserved groove is provided on the inner side of the upper end of the radiation source conduit body, and a sealing reserved component is nested inside the transverse reserved groove. The sealing reserved component is connected to the end of the docking wire rope component. A second reset spring is fixedly connected to the outer side of the sealing reserved component, and the second reset spring is connected to the inner side of the radiation source conduit body.

[0011] Furthermore, during the outward movement of the contacting docking component under force, the docking wire rope component drives the sealing reserved component to simultaneously form a traction structure, and the sealing reserved component is symmetrically distributed about the center point of the radiation source conduit body.

[0012] Furthermore, the sealing pre-reserved component forms a nested movable structure along the inner side of the transverse pre-reserved groove via the second reset spring, and the sealing pre-reserved component slides and docks along the inner side of the upper end of the radiation source conduit body.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This gynecological tumor radiotherapy applicator with navigation and positioning calibration is equipped with a guiding and supporting structure. The guiding and supporting structure is used to position and calibrate the placement of the radiotherapy source catheter body. Rotating the threaded guide pushes the outer nested rod of the radiotherapy source catheter body to move outward in conjunction with the pre-reserved part. When the nested rod moves to contact the contacting part, the inclined contacting part applies outward pressure, thereby driving the supporting and limiting part to move outward along the outer side of the radiotherapy source catheter body to form a locking support state, preventing deviation of the treatment site. After placement, it can be assisted in positioning according to the internal structure of the human body during treatment, making the overall conformity higher, avoiding defects such as uneven dose distribution, and ensuring uniform treatment distribution. Furthermore, during the vertical movement of the docking nesting rod under force, the outer docking pre-reserved part will exert vertical pressure on the contacting built-in docking liquid bladder component, allowing the built-in docking liquid bladder component to supply the built-in bearing liquid bladder component and the outer protective liquid bladder component through the supply hose. Thus, the outer protective liquid bladder component of the outer flexible liquid support structure deforms and expands to provide flexible support to the patient's body, avoiding excessive discomfort caused by hard contact. At the same time, the linked expansion of the built-in bearing liquid bladder component provides auxiliary support to the load-bearing limiting component that moves outward under force, avoiding the influence of its support angle, etc., optimizing the distribution shape of the applicator channel, maximizing the satisfaction of treatment needs, enhancing the target area coverage accuracy of the vaginal apex and cervical region, thereby improving the radiotherapy effect. Furthermore, an isolation and protection structure is provided to prevent any impact on the insertion of the radiation source catheter body. After the radiation source catheter body is inserted into the specific part of the patient's body that needs to be operated on, the positioning and contacting parts can move laterally through the docking wire rope component, thereby controlling the sealing state of the end of the radiation source catheter body and preventing any impact or cross-infection during the insertion process. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the radiation source catheter body of the present invention; Figure 3 This is a schematic diagram of the half-section three-dimensional structure of the present invention; Figure 4 This is a three-dimensional structural diagram of the load-bearing limiting component of the present invention; Figure 5 For the present invention Figure 4 A magnified schematic diagram of the central part of the structure; Figure 6 This is a three-dimensional structural diagram of the contact joint of the present invention; Figure 7 This is a three-dimensional structural diagram of the external protective liquid bladder component of the present invention; Figure 8 This is a three-dimensional structural diagram of the built-in docking liquid bladder component of the present invention; Figure 9 This is a three-dimensional structural diagram of the built-in liquid-bearing bladder component of the present invention.

[0015] In the diagram: 1. Radiation source catheter body; 2. Threaded guide; 3. Docking nesting rod; 4. Internal docking liquid bladder component; 5. Supply hose; 6. Internal bearing liquid bladder component; 7. External protective liquid bladder component; 8. Bearing limiting component; 9. Abutting docking component; 10. First return spring; 11. Docking wire rope component; 12. Sealing reserve component; 13. Second return spring; 14. Lateral reserved groove; 15. Docking reserve component. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figures 1-9 The present invention provides the following technical solution: a gynecological tumor radiotherapy applicator with navigation and positioning calibration. To address the problem that most gynecological tumor radiotherapy applicators are fixed in placement, making it impossible to perform auxiliary positioning based on the internal structure of the body during treatment, resulting in poor conformity, underdose in some target areas, and uneven dose distribution, the present invention discloses the following: a threaded guide 2 is threadedly connected to the lower outer side of the radiotherapy source catheter body 1; an arc-shaped groove is provided at the upper end of the threaded guide 2, and a mating rod 3 is nested between the threaded guide 2 and the arc-shaped groove; a bearing limiting member 8 is provided on the upper outer side of the radiotherapy source catheter body 1; and a guiding bearing structure is provided between the radiotherapy source catheter body 1 and the bearing limiting member 8, through which the positioning calibration of the radiotherapy source catheter body 1 is performed.

[0018] The guiding and bearing structure is provided with a built-in docking liquid bladder component 4, and the built-in docking liquid bladder component 4 is located on the outside of the radiation source catheter body 1. The docking nesting rod 3 is fixedly connected to the outside of the docking reserved part 15, and the docking reserved part 15 is located at the lower end of the built-in docking liquid bladder component 4. The outside of the built-in docking liquid bladder component 4 is docked with a supply hose 5. The lower end of the outside of the bearing limiting part 8 is nested and docked with a built-in bearing liquid bladder component 6, and the outside of the built-in bearing liquid bladder component 6 is docked with an external protective liquid bladder component 7. The external protective liquid bladder component 7 and the outside of the bearing limiting part 8 are docked with each other, and the built-in bearing liquid bladder component 6 and the supply hose 5 are docked with each other.A contacting member 9 is fixedly connected to the outer side of the bearing limiting member 8, and the contacting member 9 is nested and connected to the inner side of the upper end of the radiation source conduit body 1. The lower end of the contacting member 9 corresponds to the upper end of the connecting nesting rod 3. The upper end of the contacting member 9 is connected to a first return spring 10, and the outer side of the first return spring 10 is connected to the inner side of the radiation source conduit body 1. As the threaded guide member 2 moves upward along the outer thread of the radiation source conduit body 1, it pushes the nested connecting nesting rod 3 to move vertically along the outer side of the radiation source conduit body 1. The connecting nesting rod 3 forms a contacting contacting member 9. The outward pressure, along with the contact docking part 9, causes the bearing limiting part 8 to move outward along the outside of the radiation source catheter body 1. The docking nesting rod 3 applies vertical pressure to the internal docking fluid bladder component 4 through the docking pre-reserved part 15, and the internal docking fluid bladder component 4 supplies fluid to the internal bearing fluid bladder component 6 and the external protective fluid bladder component 7 through the supply hose 5. Under the real-time guidance of MRI images and ultrasound before brachytherapy, the applicator placement operation begins. The radiation source catheter body 1 is placed into or close to the tumor target area. After its basic position is determined, the threaded guide 2 can be rotated to push the externally nested docking nesting rod 3 to cooperate. The outer side of the docking pre-reserved part 15 of the radiation source catheter body 1 moves. When the docking nesting rod 3 moves to contact the contacting part 9, the inclined structure of the contacting part 9 forms an outward pressure movement, thereby driving the bearing limiting part 8 to move outward along the outer side of the radiation source catheter body 1 to form a locking support state, preventing deviation of the treatment site. After insertion, it can be assisted in positioning according to the internal structure of the human body during treatment, so as to improve the overall conformity and avoid defects such as uneven dose distribution. During the vertical movement of the docking nesting rod 3 under force, the outer docking pre-reserved part 15 will also contact the internal docking fluid. The capsule component 4 applies vertical pressure, allowing the built-in docking fluid capsule component 4 to supply fluid to the built-in supporting fluid capsule component 6 and the external protective fluid capsule component 7 via the supply hose 5. This, combined with the deformation and expansion of the external protective fluid capsule component 7 (a flexible liquid support structure), provides flexible support to the patient's body, avoiding excessive discomfort caused by rigid contact. Simultaneously, the expanding built-in supporting fluid capsule component 6 provides auxiliary support to the outward-shifting supporting limit component 8, preventing issues such as its support angle from affecting the treatment process. This optimizes the distribution shape of the applicator channel, maximizing treatment needs and enhancing the accuracy of target area coverage in the vaginal apex and cervical region.

[0019] Example 2: Based on Example 1, an isolation and protection structure is also disclosed, the specific structure of which is as follows: An isolation and protection structure is provided on the inner side of the upper end of the radiation source catheter body 1 to avoid affecting the insertion process of the radiation source catheter body 1. The isolation and protection structure is equipped with a docking wire rope component 11, which is docked with the outer side of the contact docking member 9. The docking wire rope component 11 passes through the inner side of the radiation source conduit body 1. A transverse reserved groove 14 is opened on the inner side of the upper end of the radiation source conduit body 1, and a sealing reserved member 12 is nested inside the transverse reserved groove 14. The sealing reserved member 12 is docked with the end of the docking wire rope component 11. A second return spring 13 is fixedly connected to the outer side of the sealing reserved member 12, and the second return spring 13 is docked with the inner side of the radiation source conduit body 1. During the outward movement of the contact docking member 9 under force, the sealing reserved member is driven by the docking wire rope component 11. The traction structure is formed synchronously, and the sealing pre-reserved part 12 is symmetrically distributed about the center point of the radiation source catheter body 1. The sealing pre-reserved part 12 forms a nested movable structure along the inner side of the transverse pre-reserved groove 14 through the second reset spring 13. The sealing pre-reserved part 12 slides and docks along the inner side of the upper end of the radiation source catheter body 1. After the radiation source catheter body 1 is placed into the specific part of the patient's body that needs to be operated, the abutment docking part 9, which is being positioned, can move during the operation. The sealing pre-reserved part 12 can be moved laterally by the docking wire rope part 11, thereby controlling the end closure state of the radiation source catheter body 1 and avoiding phenomena such as interference or cross-infection during the insertion of the device.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gynecological tumor radiotherapy applicator for navigation and positioning calibration, comprising a radiation source catheter body (1), wherein a threaded guide (2) is threadedly connected to the lower outer side of the radiation source catheter body (1). Its features are: The upper end of the threaded guide (2) is provided with an arc groove, and the threaded guide (2) is nested with a nested rod (3) through the arc groove. The upper outer side of the radiation source catheter body (1) is provided with a bearing limiting member (8). A guiding bearing structure is provided between the radiation source catheter body (1) and the bearing limiting member (8). The position of the radiation source catheter body (1) is positioned and calibrated by the guiding bearing structure.

2. The gynecological tumor radiotherapy applicator for navigation and positioning calibration according to claim 1, characterized in that: The guiding and bearing structure is provided with a built-in docking liquid bladder component (4), and the built-in docking liquid bladder component (4) is located on the outside of the radiation source catheter body (1). The docking nesting rod (3) is fixedly connected to a docking pre-reserved part (15), and the docking pre-reserved part (15) is located at the lower end of the built-in docking liquid bladder component (4). The built-in docking liquid bladder component (4) is docked with a supply hose (5) on its outside.

3. A gynecological tumor radiotherapy applicator for navigation and positioning calibration according to claim 2, characterized in that: The lower outer side of the bearing limiting member (8) is nested with a built-in bearing liquid bladder component (6), and the outer side of the built-in bearing liquid bladder component (6) is connected with an external protective liquid bladder component (7). The external protective liquid bladder component (7) is connected to the outer side of the bearing limiting member (8), and the built-in bearing liquid bladder component (6) is connected to the supply hose (5). The outer side of the bearing limiting member (8) is fixedly connected to the abutting member (9), and the abutting member (9) is nested and docked on the inner side of the upper end of the radiation source catheter body (1). The lower end of the abutting member (9) corresponds to the upper end of the docking nesting rod (3). The upper end of the abutting member (9) is docked with the first reset spring (10), and the outer side of the first reset spring (10) is docked with the inner side of the radiation source catheter body (1).

4. A gynecological tumor radiotherapy applicator for navigation and positioning calibration according to claim 3, characterized in that: As the threaded guide (2) moves upward along the outer thread of the radiation source conduit body (1), it pushes the nested docking rod (3) to move vertically along the outer side of the radiation source conduit body (1). The nested docking rod (3) applies outward pressure to the contacting docking member (9), and the contacting docking member (9) drives the bearing limiting member (8) to move outward along the outer side of the radiation source conduit body (1).

5. A gynecological tumor radiotherapy applicator for navigation and positioning calibration according to claim 4, characterized in that: The docking nesting rod (3) applies vertical pressure to the built-in docking liquid bladder component (4) through the docking pre-reserved part (15), and the built-in docking liquid bladder component (4) provides supply to the built-in bearing liquid bladder component (6) and the external protective liquid bladder component (7) through the supply hose (5).

6. A gynecological tumor radiotherapy applicator for navigation and positioning calibration according to claim 3, characterized in that: An isolation and protection structure is provided on the inner side of the upper end of the radioactive source catheter body (1) to avoid affecting the insertion process of the radioactive source catheter body (1). The isolation and protection structure is provided with a docking wire rope component (11), and the docking wire rope component (11) is docked with the outer side of the contact docking part (9), and the docking wire rope component (11) runs through the inner side of the radiation source conduit body (1).

7. A gynecological tumor radiotherapy applicator for navigation and positioning calibration according to claim 6, characterized in that: The upper inner side of the radioactive source conduit body (1) is provided with a transverse reserved groove (14), and a sealing reserved part (12) is nested inside the transverse reserved groove (14). The sealing reserved part (12) is connected to the end of the docking wire rope component (11). A second reset spring (13) is fixedly connected to the outer side of the sealing reserved part (12), and the second reset spring (13) is connected to the inner side of the radioactive source conduit body (1).

8. A gynecological tumor radiotherapy applicator for navigation and positioning calibration according to claim 7, characterized in that: During the outward movement of the contacting docking part (9) under force, the sealing reserved part (12) is driven by the docking wire rope part (11) to form a traction structure simultaneously, and the sealing reserved part (12) is symmetrically distributed about the center point of the radiation source duct body (1).

9. A gynecological tumor radiotherapy applicator for navigation and positioning calibration according to claim 8, characterized in that: The sealing pre-reserved part (12) forms a nested movable structure along the inner side of the transverse pre-reserved groove (14) by the second reset spring (13), and the sealing pre-reserved part (12) slides and docks along the inner side of the upper end of the radiation source duct body (1).

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