CN215231675U

CN215231675U - Device for vagina brachytherapy

Info

Publication number: CN215231675U
Application number: CN202121199124.9U
Authority: CN
Inventors: 张翔; 刘吉平; 陈建红
Original assignee: Zhejiang Cancer Hospital
Current assignee: Zhejiang Cancer Hospital
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-21
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a device for vagina brachytherapy, which comprises a hose applicator, a template and a pore channel connector. One end of the hose applicator is open and is used for connecting a short-distance radiotherapy machine so that a radioactive source can enter a tube cavity; the other section is a blind end, and a metal material is implanted into the blind end. When in brachytherapy, a template is implanted in the vagina, and an applicator is implanted through a pore passage in the template, so that the applicator is relatively fixed with a patient. Or without using a template, the flexible tube applicator is implanted into the tunnel through the tunnel connector for brachytherapy. The beneficial effects of the utility model are that avoid implanting that metal location cable brings to slide because of location cable itself position and cause uncertainty and a large amount of metal artifacts to lead to unable identification soft tissue. Can realize multi-channel tissue intercropping or intracavity brachytherapy; the dose distribution of vaginal brachytherapy is optimized.

Description

Device for vagina brachytherapy

Technical Field

The utility model relates to the field of medical equipment, in particular to a device for vagina brachytherapy.

Background

Radiotherapy is one of the main means of tumor treatment, and brachytherapy is a specific mode of radiotherapy and plays an important role in the treatment of various tumors. The brachytherapy needs to implant the applicator to a required position, and the radioactive source reaches a specified position through the cavity of the applicator and stays for a certain time to form radiotherapy dose distribution so as to achieve the purpose of treatment. The flexible tube applicator can be bent, so that the flexibility of the part where the radioactive source can reach is high, the formed dose distribution can be well adapted to the tumor form, and the flexible tube applicator has wide clinical application. However, since the flexible tube applicator is made of non-metallic materials, it is difficult to develop CT or MRI images, and the farthest position that the radioactive source can reach can be determined only by placing the positioning cable, which can generate obvious artifacts and affect the resolution of soft tissues. Since there is no fixture between the positioning cable and the hose applicator, errors in the positioning position and thus in the dose distribution can result if displaced during positioning.

The vagina is a natural cavity, and is naturally suitable for brachytherapy. At present, the template for the vaginal brachytherapy after the hysterectomy comprises a single-channel template and a multi-channel template, the head ends of the templates are closed, a radioactive source cannot reach the interior of the vaginal stump, and the radiotherapy dose of the vaginal stump is not high. The templates are cylindrical and do not necessarily fit a portion of the patient's vaginal anatomy. The single-channel template only has a single radioactive source channel, the formed radiotherapeutic dose distribution freedom degree is not high, the multi-channel template has a plurality of channels which are regularly distributed, the radiotherapeutic dose distribution freedom degree is improved to a certain degree, and a larger optimization space still exists.

Disclosure of Invention

The utility model aims to provide a device for vagina brachytherapy, which is not enough for the prior art.

The purpose of the utility model is realized through the following technical scheme: a device for vaginal brachytherapy comprises a hose applicator, a template and a duct connector; the hose applicator consists of an applicator tube wall, an applicator tube cavity and a metal mark; one end of the cavity of the applicator is a blind end, and the other end of the cavity of the applicator is an open end; a metal mark is implanted in the blind end; the template consists of a template bottom and a template body; the template bottom is fixedly connected with the template body; 4 holes are formed in the bottom of the template; the hole is connected with an external object through the opening by a rope; a plurality of pore channels are formed in the template body; the duct connector is connected with the duct, and the hose applicator is arranged in the duct.

Further, the blind end of the hose applicator is blunt or sharp.

Further, part of the channels of the template penetrate through the template body, and the head ends of the part of the channels are closed and terminated in the template body; the distribution of the pore channels is regular or irregular; the shape of the pore canal is a straight line or a curve; the diameter of the pore passage is matched with that of the hose applicator;

further, the template body is cylindrical or individualized in shape that is tailored to the specific patient's vaginal anatomy.

The utility model has the advantages that:

(1) the utility model discloses can be when using the hose to execute the source ware, clearly find the position of the farthest end that the radiation source can reach on CT or nuclear magnetic resonance image, avoid using the artifact that the location cable brought and the relative displacement with executing the source ware that the location cable can take place.

(2) The tissue insertion channel is added, so that the radiotherapy dose of the inaccessible area of the intracavity brachytherapy can be well improved; the multi-channel and bendable channel is suitable for the flexible applicator, so that the flexibility of radiotherapy dose distribution is improved, and the radiotherapy dose distribution is optimized; the vagina shape of the patient is adapted, and the comfort is improved.

(3) The utility model discloses only constitute simple structure by pore and connector. Use the utility model discloses, can insert when planting directly look at the concrete position that the source applicator got into the tissue, insert the back at the completion, the source applicator forms anticipated combination form in the tissue, obtains satisfied radiotherapy dose distribution and treatment.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is a bottom view of a first embodiment of the template of the present invention;

fig. 3 is a longitudinal sectional configuration view of a first embodiment of the present invention;

FIG. 4 is a longitudinal sectional construction view of a second embodiment of the present invention;

FIG. 5 is a view of the applicator inlet end with two parallel tunnels in use in cooperation with a tunnel connector;

FIG. 6 is a side view of two parallel tunnels in use with a tunnel connector;

FIG. 7 is a view of the applicator inlet end with two non-parallel tunnels in use with a tunnel connector;

FIG. 8 is a side view of two non-parallel tunnels in use with a tunnel connector;

FIG. 9 is a view of the applicator inlet end with three parallel ports in use with a port connector;

FIG. 10 is a side view of three parallel ports in use with a port connector;

in the figure, 1, applicator tube wall; 2. an applicator lumen; 3. a blind end; 4. an open end; 5. marking metal; 6. the farthest position that the radiation source can reach; 7. a template bottom; 8. an aperture; 9. a template body; 10. a duct; 11. a tunnel connector.

Detailed Description

As shown in FIG. 1, the flexible tube applicator includes an applicator tube wall 1, an applicator lumen 2, a blind end 3, an open end 4, metallic markers 5 and a distal-most position 6 accessible to the radioactive source. One end of the hose applicator is a blind end 3, and the other end of the hose applicator is an open end 4; the blind end 3 is implanted with the metal mark 5, the hose applicator is implanted into a patient body and fixed, a tomographic image is obtained through CT or nuclear magnetic resonance scanning, and the image is three-dimensionally reconstructed in a radiotherapy planning system to obtain a longitudinal section of the hose applicator. The position of the metal marker 5 is recognized, the farthest position 6 that the radiation source can reach is estimated from the constant distance between the metal marker 5 and the farthest position 6 that the radiation source can reach, and the radiation source is distributed from this position to design a brachytherapy plan. The constant distance is determined by the product parameters of the applicator.

As shown in fig. 2, the template comprises a template bottom 7, a hole 8, a template body 9 and a pore canal 10; the template bottom 7 is fixedly connected with the template body 9; 4 holes 8 are formed in the bottom 7 of the template; the hole is connected with an external object through the opening by a rope; the end of the template body 9 is opened with a plurality of holes 10. The template bottom 7 and the template body 9 are rigidly connected or integrally formed, the tail end of the template body 9 is provided with an opening of a pore canal 10, the opening distribution of the pore canal 10 can be in any shape, and the pore canal 10 is arranged at the opening at the tail part of the template body 9 for implanting an applicator.

As shown in FIG. 3, the template body 9 is cylindrical, the opening 10 may be opened at the head end of the template body 9 or may not be opened therein, and the applicator may be inserted into the vaginal tissue through the through opening 10 or may be placed in the non-through opening 10 and then terminate in the vagina. Rigid applicators may be implanted in a straight tunnel 10 and flexible applicators may be implanted in a straight or curved tunnel 10.

As shown in fig. 4, the template body 9 is an individualized shape adapted to the shape of the vagina, the duct 10 may extend through the template body 9 and end at the head end thereof or not extend through the inside thereof, and the applicator may be inserted into the vaginal tissue through the duct 4 extending therethrough or may be placed in the duct 10 not extending therethrough and end in the vagina. Rigid applicators may be implanted in a straight tunnel 10 and flexible applicators may be implanted in a straight or curved tunnel 10.

When the template is not used, the duct connector can be directly used, and the hose applicator can be implanted into the duct through the duct connector to carry out brachytherapy, and the specific use method is shown in figures 5-10.

The orifices 10 are connected by orifice connectors 11, and the orifices 10 may or may not be parallel to the orifices 10. A tunnel 10 and a tunnel connector 11. The channel 10 is thin walled and the diameter of the channel 10 matches the diameter of the hose applicator.

In FIGS. 5 and 6, if two tunnels 10 are parallel to each other, and implanted using the tunnel connector 11, the parallel arrangement of the two inter-tissue hose applicators at a fixed spacing is obtained by placing the outlet end of the tunnel connector 11 at the desired location for the hose applicator to enter the tissue, and the two hose applicators from the two tunnels 10 to enter the tissue.

In figures 7 and 8, if the two tunnels 10 are not parallel, the desired non-parallel distribution of the two inter-tissue hose applicators is obtained by placing the outlet end of the tunnel connector 11 at the desired location for the hose applicator to enter the tissue and the two hose applicators to enter the tissue from the two tunnels 10.

In FIGS. 9 and 10, if three tunnels 10 are parallel to each other, and implanted using the tunnel connector 11, the parallel distribution of three intertissue hose applicators at fixed intervals can be obtained by placing the outlet end of the tunnel connector 11 at the desired location for the hose applicators to enter the tissue, and three hose applicators to enter the tissue from three tunnels 10.

Claims

1. A device for vaginal brachytherapy comprising a flexible tube applicator, a template, a tunnel connector (11); the flexible pipe applicator consists of an applicator pipe wall (1), an applicator pipe cavity (2) and a metal mark (5); one end of the applicator tube cavity (2) is a blind end (3), and the other end is an open end (4); a metal mark (5) is implanted in the blind end (3); the template consists of a template bottom (7) and a template body (9); the template bottom (7) is fixedly connected with the template body (9); the template bottom (7) is provided with 4 holes (8); a plurality of pore canals (10) are formed in the template body (9); the duct connector (11) is connected with the duct (10), and the hose applicator is arranged in the duct (10).

2. Device for vaginal brachytherapy according to claim 1, wherein the blind end (3) of the hose applicator is blunt or sharp.

3. The apparatus for vaginal brachytherapy as claimed in claim 1, wherein a portion of the tunnel (10) of the template penetrates the template body (9), and a portion of the tunnel (10) terminates closed at a head end in the template body (9); the shape of the pore canal (10) is a straight line or a curve.

4. The apparatus for vaginal brachytherapy as claimed in claim 1, wherein the template body (9) is cylindrical in shape.