CN110975175A - A protective device for intracavitary radiotherapy for gynecological tumors - Google Patents

Abstract

The invention relates to a gynecological tumor intracavity radiation therapy protection device, which comprises a plastic column, a central tube, a main radiation tube, an auxiliary radiation tube, a plastic column support and a protection sleeve; the plastic column is a porous structure mixed with a ray shielding material; the central tube and the auxiliary radiation tube penetrate through the plastic column support and are inserted into the plastic column along the axial direction of the plastic column; the inside of the main radiation tube and/or the auxiliary radiation tube is provided with a radioactive source; the ray shielding material is provided with a notch part at a specific position of the central tube and the auxiliary radiation tube, and the notch part allows the radioactive rays emitted by the radioactive source to pass through; the side wall of the central tube is provided with a plurality of permeation holes, and one end of the central tube, which is left outside the plastic column support, is connected with the fluid pump; a fluid pump is used to deliver fluid into the interior of the central tube and through the perforations and the plastic column into the space between the shield and the outer peripheral wall of the plastic column, the fluid expanding the shield, the expanding shield pushing the bladder and rectum away from the radiation source.

Description

Radiation therapy protector in gynaecology's tumour intracavity

Technical Field

The invention relates to the technical field of medical instruments, in particular to a gynecological tumor intracavity radiation therapy protection device.

Background

Common gynecological tumors include vulvar tumor, vaginal tumor, uterine tumor, ovarian tumor and fallopian tube tumor. The current incidence rate of gynecological tumors shows a trend of rising year by year, and seriously threatens the physical and psychological health of women. In the prior art, intracavity radiation therapy is often adopted for treating gynecological tumors. Intracavitary radiotherapy refers to a method of introducing radioactive source into the affected part of a human body through natural orifices, such as vagina and rectum, and then introducing the radioactive source into the tumor part for radiotherapy, which is also called afterloading therapy. The intracavity radiation therapy can directly act on the tumor part, so that the tumor part can obtain higher radiation dose and the treatment time is shortened. However, in the prior art, the normal tissues are damaged by the intracavity radiation therapy, particularly when vaginal tumors and uterine tumors are treated, the bladder and rectum are not protected enough, high-dose spots can appear in the rectum and the bladder, and the originally healthy tissues and organs can be damaged in the radiation therapy process.

Disclosure of Invention

The invention aims to provide a gynecological tumor intracavity radiation therapy protection device, which at least solves the technical problem of how to protect healthy or normal tissues in the intracavity radiation therapy process.

In order to achieve the purpose, the invention provides a gynecological tumor intracavity radiation therapy protection device which comprises a plastic column, a central tube, a main radiation tube, an auxiliary radiation tube, a plastic column support and a protection sleeve, wherein the protection sleeve is sleeved on the outer side of the peripheral wall of the plastic column; the plastic column support is fixedly arranged at the tail end of the plastic column; the plastic column is a porous structure, and a ray shielding material is blended in the porous structure; the central tube penetrates through the plastic column support and is inserted into the plastic column along the axial direction of the plastic column; the auxiliary radiation tube penetrates through the plastic column support and is inserted into the plastic column along the direction parallel to the axial direction of the plastic column; the auxiliary radiation tube is arranged outside the peripheral wall of the central tube; the main radiation tube is inserted in the central tube and extends along the axial direction of the central tube; the inside of the main radiation tube and/or the auxiliary radiation tube is provided with a radioactive source; the ray shielding material is provided with a notch part at a specific position of the central tube and the auxiliary radiation tube, and the notch part allows the radioactive rays emitted by the radioactive source to pass through and reach a tumor part; the side wall of the central pipe is provided with a plurality of permeation holes, and one end of the central pipe, which is left outside the plastic column support, is connected with the fluid pump; the fluid pump is adapted to pump fluid into the interior of the central tube and through the perforations and the plastic column into the space between the shield and the outer peripheral wall of the plastic column, the fluid expanding the shield, the expanding shield urging the bladder and rectum away from the radiation source.

The cellular structure of the plastic column is composed of polyester foam, polyurethane foam, silicone foam and/or thermoplastic elastomer foam.

The top of the plastic column is provided with a concave part, and the concave shape of the concave part is matched with the convex shape of the cervix.

The radioactive source comprises a radionuclide comprising cesium, iridium, iodine, cobalt, palladium, strontium, yttrium, ruthenium or a combination of any two or more thereof.

The top of center tube be provided with the check valve, the check valve stretch out in the space between sunken bottom and the lag of depressed part.

The main radiation tube and the auxiliary radiation tube are made of flexible polymer materials; the flexible polymer material comprises fluorine-containing polymer, polyether-ether-ketone, polyethylene terephthalate, silicone resin, polyamide or polyether block amide.

The central tube is made of an aluminum alloy material.

The protective sleeve is made of natural latex, synthetic latex, medicinal rubber, polyurethane or silicone resin.

The fluid pumped into the interior of the central tube is air or saline with contrast media.

The inner wall of the protective sleeve is adhered to a part of the outer peripheral wall of the plastic column except the concave part through an adhesive.

Advantageous effects

Compared with the prior art, the invention has the beneficial effects that: the gynecological tumor intracavity radiation therapy protection device reasonably designs the protection structure aiming at normal tissues such as bladder, rectum and the like, and pushes the normal tissues such as bladder, rectum and the like to the position far away from a radiation source through the expansion of the protection sleeve during intracavity radiation therapy, thereby avoiding unacceptable damage to the normal tissues. Meanwhile, the gynecological tumor intracavity radiation therapy protection device has proper plasticity, and does not cause pain or discomfort of a patient when inserted into the cavity. Meanwhile, the main radiation tube and the auxiliary radiation tubes of the protection device can apply radiation sources, and the auxiliary radiation tubes surround the main radiation tube, so that radiotherapy can be performed on tumors in different positions in the cavity of a patient.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a schematic structural view of the gynecological tumor intracavity radiation therapy protective device.

Fig. 2 is a cross-sectional view of another embodiment of the shield apparatus of the present invention.

Detailed Description

The present invention is described in more detail below to facilitate an understanding of the present invention.

As shown in fig. 1 and fig. 2, the gynecological tumor intracavity radiation therapy protective device 1 comprises aplastic column 2, acentral tube 14, amain radiation tube 4, anauxiliary radiation tube 6, aplastic column support 20 and aprotective sleeve 16, wherein theprotective sleeve 16 is sleeved on the outer side of the outer peripheral wall of theplastic column 2; theplastic column support 20 is fixedly arranged at the tail end of theplastic column 2; theplastic column 2 is a porous structure, and a ray shielding material is blended in the porous structure; thecentral tube 14 passes through theplastic column support 20 and is inserted into theplastic column 2 along the axial direction of theplastic column 2; theauxiliary radiation tube 6 passes through theplastic column support 20 and is inserted into theplastic column 2 along the direction parallel to the axial direction of theplastic column 2; theauxiliary radiation tube 6 is arranged outside the outer peripheral wall of thecentral tube 14; themain radiation tube 4 is inserted in thecentral tube 14 and extends along the axial direction of thecentral tube 14; the inside of themain radiation tube 4 and/or theauxiliary radiation tube 6 is provided with a radioactive source; the ray shielding material is provided with a gap part at a specific position of thecentral tube 14 and theauxiliary radiation tube 6, and the gap part allows the radioactive rays emitted by the radioactive source to pass through and reach a tumor part; the side wall of thecentral pipe 14 is provided with a plurality ofpermeation holes 5, and one end of thecentral pipe 14, which is left outside theplastic column support 20, is connected with a fluid pump; the fluid pump is used to deliver fluid into thecentral tube 14 and through thepermeate holes 5 and theplastic column 2 into the space between theshield 16 and the outer peripheral wall of theplastic column 2, the fluid expanding theshield 16, the expandingshield 16 pushing the bladder P and rectum Z away from the radioactive source.

The cellular structure of theplastic column 2 is made of polyester foam, polyurethane foam, silicone foam and/or thermoplastic elastomer foam.

As shown in fig. 1, the top end of theplastic column 2 is provided with a concave portion 10, and the concave shape of the concave portion 10 matches the convex shape of thecervix 12. It will also be understood by those skilled in the art that the top end of theplastic post 2 may also be provided with a raised portion, as shown in fig. 2, and the top of theshield 16 is provided with anose 9, the raised portion corresponding in position and sized to thenose 9 on theshield 16.

The radioactive source comprises a radionuclide comprising cesium, iridium, iodine, cobalt, palladium, strontium, yttrium, ruthenium or a combination of any two or more thereof.

The top end of thecentral tube 14 is provided with acheck valve 24, and thecheck valve 24 extends out of the space between the recessed bottom of the recess 10 and theshield 16. The check valve prevents fluid in the space between the recessed bottom of the recess 10 and theshield 16 from backflowing back to thecentral tube 14.

Themain radiation tube 4 and theauxiliary radiation tube 6 are made of flexible polymer materials; the flexible polymer material comprises fluorine-containing polymer, polyether-ether-ketone, polyethylene terephthalate, silicone resin, polyamide or polyether block amide.

Thecenter tube 14 is made of an aluminum alloy material.

Theprotective sleeve 16 is made of natural latex, synthetic latex, medicinal rubber, polyurethane or silicone.

The fluid pumped into the interior of thecentral tube 14 is air or saline with contrast.

The inner wall of theprotective sleeve 16 and a part of the outer peripheral wall of theplastic column 2 except the recess 10 are adhered together by an adhesive.

It is further preferred that the inner wall of theprotective cover 16 is also bonded to a portion of the concave wall of the concave portion of the recess 10 (excluding the portion where thecheck valve 24 is located) by an adhesive.

A radio-opaque shielding coil 22 (e.g., an uncoiling coil of titanium or stainless steel) is disposed inside the tip of theauxiliary radiation tube 6. The shielding coil is used to help register the location of insertion of theplastic post 2 into the patient's lumen. After theplastic cylinder 2 is inserted into the patient's lumen, the position of theshield coil 22 can be observed by a CT or the like, thereby determining the position of theplastic cylinder 2 inserted into the patient's lumen.

Theplastic column support 20 is made of silicone, and a plurality of through holes are arranged on theplastic column support 20, and themain radiation tube 4 and theauxiliary radiation tube 6 can pass through the through holes and can be inserted into theplastic column 2 along the axial direction of theplastic column 2. Theplastic column holder 20 and the through-hole serve to prevent themain radiation tube 4 and theauxiliary radiation tube 6 from being entangled with and interfering with each other.

The radiation shielding material incorporated in the porous structure includes, but is not limited to, powder particles of barium sulfate, bismuth subcarbonate, tantalum, or tungsten.

Theauxiliary radiation tubes 6 are provided in a plurality, and the plurality ofauxiliary radiation tubes 6 are arranged along the circumferential direction of thecentral tube 14 to surround themain radiation tube 4 at the central position.

In order to facilitate the storage and the insertion during the use and reduce the pain of patients, the gynecological tumor intracavity radiation therapy protective device 1 can connect the end of thecentral tube 14 which is left outside theplastic column support 20 with a vacuum extractor to vacuumize thecentral tube 14 and theplastic column 2 before the use. Because theplastic column 2 is of a porous structure, and the side wall of thecentral tube 14 is provided with a plurality ofpermeation holes 5, theprotective sleeve 16 is tightly attached to the outer peripheral wall of theplastic column 2 during vacuum pumping, and the porous structure of theplastic column 2 is shrunk, so that the diameter of theplastic column 2 is reduced, and the plastic column is more easily inserted into the inner cavity of a patient. Because theplastic column 2 has proper plasticity, the plastic column does not cause pain or discomfort to a patient when inserted into the cavity.

After insertion into the patient's lumen, fluid is pumped into thecentral tube 14 and through the porous structure of theporous pores 5 and theplastic column 2 into the space between theprotective sheath 16 and the outer peripheral wall of theplastic column 2, said fluid expanding theprotective sheath 16, the expandingprotective sheath 16 pushing the bladder P and rectum Z away from the radioactive source. The fluid also inflates and expands the porous structure of theplastic column 2. The position of theshield coil 22 can be observed by means of a CT or the like, and the position of theplastic post 2 inserted into the lumen of the patient can be determined. After being adjusted to the proper position, the radioactive source inside themain radiation tube 4 and/or theauxiliary radiation tube 6 starts to perform the radiotherapy on the tumor of the patient.

Since the radiation shielding material is provided with a cutout portion at a specific position of thecentral tube 14 and theauxiliary radiation tube 6, the cutout portion allows the radiation emitted from the radiation source to pass through and reach the tumor site. For example, for cervical cancer, a notch portion is provided at a position below thecheck valve 24 in fig. 1, and a concave portion of the concave portion 10 is provided at a position corresponding to the end of theauxiliary radiation tube 6, so that radiation emitted from thecentral tube 14 and the radiation source in theauxiliary radiation tube 6 can pass through the notch portion to reach the site of cervical cancer lesion. One skilled in the art will appreciate that the gap can be placed at different locations for different tumors to provide targeted treatment of the tumor. The other parts without the gap part shield the ray to avoid injuring normal tissues and organs.

The foregoing describes preferred embodiments of the present invention, but is not intended to limit the invention thereto. Modifications and variations of the embodiments disclosed herein may be made by those skilled in the art without departing from the scope and spirit of the invention.

Claims (10)

1. The protection device for gynecological tumor intracavity radiotherapy is characterized by comprising a plastic column, a central tube, a main radiation tube, an auxiliary radiation tube, a plastic column support and a protection sleeve, wherein the protection sleeve is sleeved on the outer side of the peripheral wall of the plastic column; the plastic column support is fixedly arranged at the tail end of the plastic column; the plastic column is a porous structure, and a ray shielding material is blended in the porous structure; the central tube penetrates through the plastic column support and is inserted into the plastic column along the axial direction of the plastic column; the auxiliary radiation tube penetrates through the plastic column support and is inserted into the plastic column along the direction parallel to the axial direction of the plastic column; the auxiliary radiation tube is arranged outside the peripheral wall of the central tube; the main radiation tube is inserted in the central tube and extends along the axial direction of the central tube; the inside of the main radiation tube and/or the auxiliary radiation tube is provided with a radioactive source; the ray shielding material is provided with a notch part at a specific position of the central tube and the auxiliary radiation tube, and the notch part allows the radioactive rays emitted by the radioactive source to pass through and reach a tumor part; the side wall of the central pipe is provided with a plurality of permeation holes, and one end of the central pipe, which is left outside the plastic column support, is connected with the fluid pump; the fluid pump is adapted to pump fluid into the interior of the central tube and through the perforations and the plastic column into the space between the shield and the outer peripheral wall of the plastic column, the fluid expanding the shield, the expanding shield urging the bladder and rectum away from the radiation source.

2. A gynecological intraluminal radiation therapy shielding device according to claim 1, wherein said cellular structure of said plastic posts is constituted by polyester foam, polyurethane foam, silicone foam and/or thermoplastic elastomer foam.

3. A gynecological tumor intracavity radiation therapy shield apparatus as claimed in claim 1 wherein said plastic post is provided at a top end thereof with a concavity, said concavity having a concave shape matching the convex shape of the cervix.

4. A gynecological tumor intracavity radiation therapy shield apparatus according to claim 1 wherein said radiation source includes a radionuclide comprising cesium, iridium, iodine, cobalt, palladium, strontium, yttrium, ruthenium or a combination of any two or more thereof.

5. A gynecological intraluminal radiation therapy shielding device according to claim 1, wherein said top end of said central tube is provided with a check valve, said check valve extending in the space between the bottom of the recess and the shielding sheath.

6. The intraluminal radiation therapy shielding device of claim 1, wherein said primary and secondary radiation tubes are made of a flexible polymeric material; the flexible polymer material comprises fluorine-containing polymer, polyether-ether-ketone, polyethylene terephthalate, silicone resin, polyamide or polyether block amide.

7. A gynecological intracavity radiation therapy shield device according to claim 1 wherein said central tube is made of an aluminum alloy material.

8. The intraluminal radiation therapy shield of claim 1, wherein said shield is made of natural latex, synthetic latex, medicinal rubber, polyurethane or silicone.

9. The intraluminal radiation therapy shielding device of claim 1, wherein the fluid pumped into the interior of the central tube is air or saline with contrast agent.

10. A shield for intraluminal radiation therapy according to claim 5, wherein the inner wall of the shield and a portion of the outer peripheral wall of the plastic column excluding the recess are bonded together by an adhesive.

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