Radioactive particle implantation device

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a radioactive particle implanting device which particularly comprises a needle tube, a sharp-head needle core, a blunt-head needle core, a flat-head needle core and a particle implanting device, the sharp-head needle core is used for puncturing skin, the blunt-head needle core is used for puncturing fragile tissue, the flat-head needle core is used for pushing in particles, and the particle implanting device is used for implanting particles. The needle head of the flat-head needle core is flush with the front end of the needle tube, the tail end of the flat-head needle core is connected with the inlet of the needle core in a clamped mode, it is guaranteed that radioactive particles are accurately fed into tumor cells of tissue to be treated, and meanwhile the length of the needle point of the blunt-head needle core is set to be equal to the height of the implanted particle sealing tube, so that the needle head of the blunt-head needle core is the accurate implantation position of the radioactive particles. And accurate positioning of an implantation part can be further realized, and the device can be widely applied to treatment of tumor cells.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the medical instrument technical field, more specifically, relate to a radioactive particle implantation device. BACKGROUND

[0002] Radioactive particle implantation therapy, also known as brachytherapy, is a technique that involves implanting tiny radioactive sources (particles) directly into the tumor or the tissue infiltrated by the tumor, and using the continuous low-energy gamma rays emitted by the radioactive particle source to treat the tumor tissue locally. This method aims to maximize the radiation damage and destruction of tumor tissue while minimizing damage to surrounding normal tissue. The commonly used iodine 125 radioactive particle is a miniature radioactive source, which is formed by sealing a silver rod with a diameter of 0.5mm and a length of 3.0mm, which permeates iodine 125, in a titanium tube with a diameter of 0.8mm, a length of 4.5mm and a wall thickness of 0.05mm. In recent years, with the development of medical technology, radioactive particle implantation therapy has been increasingly applied to the treatment of tumors including lung cancer, liver cancer, etc.

[0003] There are three ways of particle implantation therapy: template implantation, B-ultrasound and CT-guided implantation, and intraoperative implantation. The first two methods require the use of puncture needles. Currently, the widely used puncture needles are mainly traditional bevel needle and triangular needle. For example, the radioactive particle implantation puncture needle with triangular needle head disclosed in Chinese utility model patent CN 215349349 U is used to improve the accuracy of particle release, but there is still a risk of tissue damage. The existing devices have the following disadvantages when in use: the bevel / triangular needle head causes great damage to the tissue and is easy to pierce blood vessels, especially in tissues with rich blood supply such as lung, liver, brain, etc., and tissue and blood vessel damage needs to be vigilant. The bevel needle implantation position deviates, and the accuracy is insufficient, etc., which ultimately leads to limited treatment effect, and the existing technology does not accurately position the particle implantation, and the particle moves and wanders, including moving in fragile tissues such as lung, liver, brain, etc., thereby causing radioactive damage to non-target areas. If the particle is close to the superficial skin or mucosa, it will also cause local damage, such as skin and mucosa ulcers. If the particle is not accurately implanted into the patient's body, it will also cause a decrease in medical effect and an increase in the risk of medical accidents.

[0004] At present, most of the particle implanters on the market can only accommodate about ten particles. For example, a cartridge type radioactive particle implantation gun disclosed in Chinese Utility Model Patent CN217794145U has a plurality of sealed seeds inside the particle cartridge. Currently, each cartridge can hold ten radioactive particles in actual production and application. The existing technology also discloses a particle implantation gun which is composed of a gun body, a handle, a particle pushing rod, a cartridge type particle bin, etc. The common standard cartridge quantity of the cartridge type particle bin is generally 10. According to the different sizes of tumors and different particle implantation schemes, the tumor center is dense, the periphery is sparse, the large tumor body finally implants more particles, and may need four or fifty particles. The small tumor body may only need a few or a dozen to ensure the curative effect. Therefore, developing a device that can simultaneously implant multiple particles is a technical problem that needs to be solved at present. Utility model content

[0005] In view of the defects of the prior art, the utility model provides a radioactive particle implantation device to solve the technical problems of the prior art, such as large tissue and blood vessel damage, inaccurate positioning, and how to simultaneously implant a large number of radioactive particles.

[0006] The technical scheme adopted by the utility model to solve its technical problems is:

[0007] A radioactive particle implantation device, characterized in that it comprises a needle tube, a sharp needle core, a blunt needle core, a flat needle core, and a particle implanter. The needle tube has a needle tube front end, a needle tube body, and a needle tube tail end from top to bottom. The sharp needle core has a sharp needle core needle tip, a sharp needle core body, and a sharp needle core tail end from top to bottom. The blunt needle core has a blunt needle core needle tip, a blunt needle core body, and a blunt needle core tail end from top to bottom. The flat needle core has a flat needle core needle head and a flat needle core tail end from top to bottom. The particle implanter is provided with a particle outlet and a needle core inlet on the outer periphery, and a particle sealing tube is arranged inside the particle implanter. The radioactive particle implantation device has the following three states when working:

[0008] (i) The inside of the needle tube is sleeved with the sharp needle core, the sharp needle core tail end is clamped with the needle tube tail end, and the sharp needle core needle tip is completely exposed in the needle tube front end;

[0009] and / or (ii) The inside of the needle tube is sleeved with the blunt needle core, the blunt needle core tail end is clamped with the needle tube tail end, and the blunt needle core needle tip is completely exposed in the needle tube front end;

[0010] and / or (iii) The needle tube tail end is clamped on the particle outlet, the flat needle core needle head is inserted into the particle implanter from the needle core inlet, the particle sealing tube is pushed out from the particle outlet, and the flat needle core is sleeved in the inside of the needle tube.

[0011] Preferably, the flat needle core needle head is flush with the needle tube front end opening, and the flat needle core tail end is clamped with the needle core inlet.

[0012] Preferably, the outer side wall of the needle tube body is provided with scale lines; and the needle tube front end is flat.

[0013] Preferably, the sharp needle core needle tip is a triangular pyramid shaped needle tip; and the blunt needle core needle tip is a conical needle tip.

[0014] Preferably, the particle implanting device is from top to bottom a cover plate, a particle rotating disc and a bottom plate, the particle outlet is arranged on the cover plate, the needle core inlet is arranged on the bottom plate, the bottom plate comprises a first platform and a second platform, the first platform is arranged on the second platform, and the diameter of the first platform is smaller than that of the second platform; the particle implanting device further comprises a sleeve ring, the sleeve ring is sleeved on the outer periphery of the first platform, and the particle rotating disc is sleeved on the outer periphery of the sleeve ring; the particle rotating disc is provided with particle storage bins along the circumference, the particle sealing tube is placed in the particle storage bin, and radioactive particles are placed in the particle sealing tube.

[0015] Preferably, the particle storage bin is provided with one empty bin.

[0016] Preferably, the outer periphery of the particle rotating disc is provided with particle indication lines, each particle indication line corresponds to the position of the particle storage bin, and emission port indication lines are arranged at the positions of the corresponding particle outlets on the cover plate.

[0017] Preferably, the height of the particle sealing tube is equal to the length of the blunt needle core needle tip.

[0018] Preferably, the particle implanting device further comprises a handle, and the top end of the handle is connected with the bottom plate.

[0019] Compared with the prior art, the particle implanting device has the following technical advantages:

[0020] (1) The particle implanting device is provided with three kinds of needle core needle heads, namely a sharp needle head, a blunt needle head and a flat needle head, the sharp needle head can meet the breakthrough of tough parts, the blunt needle head can avoid damage to fragile tissues of the treatment part, and the flat needle head is matched with the particle implanting device to assist the pushing of radioactive particles.

[0021] (2) The flat needle core needle head is flush with the needle tube front end, and the flat needle core tail end is clamped with the needle core inlet, so that the radioactive particles can be accurately sent to the tumor cells of the treatment part, and the length of the blunt needle core needle tip is equal to the height of the implanted particle sealing tube, so that the position of the blunt needle core needle head is the position of the accurate implantation of radioactive particles, and the accurate positioning of the implantation part can be further realized.

[0022] (3) The particle implanting device is provided with multiple particle sealing tubes, so that a large number of radioactive particles can be implanted simultaneously, the problem that only a small amount of particles can be implanted simultaneously in the prior art is solved, and the requirement of tumor radioactive particle treatment implantation can be met, and the disassembly process is simple. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a front structure view of the needle tube, wherein Figure 1 a is a full view, and b is an enlarged view of the front end of the needle tube.

[0024] Figure 2 is a front structure view of the sharp needle core, wherein Figure 2 a is a full view, and b is a detailed structure view of the triangular pyramid-shaped needle tip of the sharp needle core.

[0025] Figure 3 is a front structure view of the blunt needle core, wherein Figure 3 a is a full view, and b is a detailed structure view of the conical needle tip of the blunt needle core.

[0026] Figure 4 is a front structure view of the flat needle core, wherein Figure 4 a is a full view, and b is a detailed structure view of the needle head of the flat needle core.

[0027] Figure 5 is an axial view of the particle implanting device.

[0028] Figure 6 is a top view and a bottom view of the particle implanting device

[0029] Figure 7 is a detailed view of the particle rotating disc, the particle sealing tube and the particle storage bin.

[0030] Figure 8 is an internal split view of the particle implanting device.

[0031] In the figure: 1, needle tube; 101, front end of the needle tube; 102, scale line; 103, body part of the needle tube; 104, tail end of the needle tube; 2, sharp needle core; 201, needle tip of the sharp needle core; 202, body part of the sharp needle core; 203, tail end of the sharp needle core; 3, blunt needle core; 301, needle tip of the blunt needle core; 302, body part of the blunt needle core; 303, tail end of the blunt needle core; 4, flat needle core; 401, needle head of the flat needle core; 402, tail end of the flat needle core; 5, particle implanting device; 501, particle outlet; 502, particle rotating disc; 503, particle indicating line; 504, emitting port indicating line; 505, handle; 506, needle core inlet; 507, particle storage bin; 508, cover plate; 509, bottom disc; 510, collar; 511, first table surface; 512, second table surface; 6, particle sealing tube. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be described in further detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] Example 1

[0034] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 A radioactive particle implanting device, including needle tube 1, sharp needle core 2, blunt needle core 3, flat needle core 4 and particle implanting device 5, particle sealing tube 6, the sharp needle core 2, blunt needle core 3, flat needle core 4 are solid needle core, the needle tube 1 is respectively needle tube front end 101, needle tube body 103, needle tube tail end 104 from top to bottom, the needle tube front end 101 is flat, and the hollow sleeve with scale line 102 is provided on the side; The sharp needle core 2 is respectively sharp needle core needle tip 201, sharp needle core body 202, sharp needle core tail end 203 from top to bottom; The blunt needle core 3 is respectively blunt needle core needle tip 301, blunt needle core body 302, blunt needle core tail end 303 from top to bottom, the inside of the needle tube 1 is provided with sharp needle core 2, and the sharp needle core tail end 203 is connected with the needle tube tail end 104; The inside of the needle tube 1 is provided with blunt needle core 3, and the blunt needle core tail end 303 is connected with the needle tube tail end 104, the flat needle core 4 is respectively flat needle core needle head 401, flat needle core tail end 402 from top to bottom; The sharp needle core needle tip 201 is three pyramid, and the penetration and strength are better; The blunt needle core needle tip 302 is conical, and the tissue and blood vessel are not easy to damage; The outside wall of the needle tube body 103 is provided with scale line 102; The needle tube front end 101 is flat.

[0035] The particle implanting device 5 is respectively particle outlet 501, cover plate 508, particle rotating disc 502, bottom disc 509, needle core inlet 506 from top to bottom, the particle outlet 501 is provided on the cover plate 508, the needle core inlet 506 is provided on the bottom disc 509, the needle tube tail end 104 is connected with the particle outlet 501, the flat needle core needle head 401 is inserted into the particle implanting device from the needle core inlet 506, the flat needle core needle head 401 is flush with the needle tube front end 101, and the flat needle core tail end 402 is connected with the needle core inlet 506.

[0036] The bottom disc 509 comprises a first table 511 and a second table 512, the first table 511 is arranged on the second table 512, and the diameter of the first table 511 is smaller than that of the second table 512; the particle implanter 5 further comprises a sleeve ring 510, the sleeve ring 510 is sleeved on the periphery of the first table 511, and the particle turntable 502 is sleeved on the periphery of the sleeve ring 510; the particle turntable 502 is provided with particle storage bins 507 on the circumference, the particle storage bins 507 are provided with one empty bin, and particle sealed tubes 6 are arranged in the remaining particle storage bins 507; the particle turntable 502 is provided with particle indication lines 503 on the periphery, each particle indication line 503 corresponds to the position of a particle storage bin 507, and a launching port indication line 504 is arranged at the position of the corresponding particle outlet 501 of the cover plate 508; the length of the blunt needle core needle tip 301 is equal to the height of the particle sealed tube 6, so that the positioning accuracy is ensured.

[0037] The particle turntable 502 is provided with 0-30 numbers and scale marks, which correspond to 31 particle storage bins 507 in the inside, wherein the No. 0 bin is an empty bin, the particle sealed tubes 6 are arranged in the No. 1-30 bins, and the handle 506 is convenient for gripping. When the particle indication line 503 is aligned with the launching port indication line 504, the particle and the needle core inlet 506 and the particle outlet 501 form a straight line; the flat needle core needle head 401 is flat, the flat needle core tail end 402 is in the shape of a cap, can enter the needle core inlet 506 on the particle implanter 5, pass through the particle storage bin 507 on the particle turntable 502, push the corresponding particle sealed tube 6 to move upwards along the particle outlet 501, enter the needle tube 1 from the particle outlet 501, and finally the flat needle core tail end 402 is clamped with the needle core inlet 506, and when the flat needle core tail end 402 is completely pushed in, the flat needle core needle head 401 is just flush with the opening of the needle tube front end 101.

[0038] The working principle of the utility model is: first, the three-prism sharp needle core 2 is sleeved into the needle tube 1 to break through the tough skin and subcutaneous tissue. Then, the sharp needle core 2 is withdrawn from the needle tube 1, and the conical blunt needle core 3 is replaced to advance in the loose tissue and blood-rich tissue and penetrate into the inside of the tumor tissue. The position of the blunt needle core needle tip 301 is the accurate implantation position of the radioactive particle. In this process, if the tumor capsule is dense and the blunt needle core is difficult to enter, the three-prism sharp needle core 2 is replaced to break through the capsule, and then the conical blunt needle core 3 is replaced to penetrate into the planned particle implantation position. At this time, the needle tube 1 can prompt the tumor depth on the skin surface scale line 102, then the blunt needle core 3 is withdrawn, and the needle tube tail end 104 is clamped with the particle outlet 501 of the particle implanter 5.

[0039] The particle indicating line 503 is scaled as 0, which is the empty cartridge. In the non-working state, the 0 scale line is aligned with the emission port indicating line 504, which is the safety position. The particle indicating line 503 is scaled as 1-30, which is the particle cartridge. In the implantation, the track alignment and implantation are achieved by twisting the particle turntable 502. The particle turntable 502 is twisted, and when the number 1 scale line is aligned with the emission port indicating line 504, the rotation is stopped. The flat needle core 4 is inserted through the needle core inlet 506, and the particle is pushed from the corresponding No. 1 particle storage cartridge 507 to the needle tube 1 through the particle outlet 501 in sequence. When the flat needle core tail end 402 and the needle core inlet 506 are fitted, the flat needle core needle head 401 is flush with the opening at the front end 101 of the needle tube. The particle position corresponds to the position where the blunt needle core needle tip 301 is just located, and the particle is accurately implanted into the tumor tissue. Then the flat needle core 4 is withdrawn, the particle turntable 502 is rotated to No. 2, and the above process is repeated. The whole process is carried out under the guidance of the image, which can realize small tissue and blood vessel damage and accurate implantation of radioactive particles.

[0040] In addition, according to the different number of particles implanted according to the tumor size, the particle implanter 5 can realize the simultaneous implantation of multiple particles, which can meet the needs of most tumor radioactive particle therapy implantation, and the disassembly process is simple.

[0041] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A radioactive seed implantation device, characterized by, The application relates to a radioactive particle implanting device, which comprises a needle tube (1), a sharp needle core (2), a blunt needle core (3), a flat needle core (4) and a particle implanting device (5), wherein the needle tube (1) comprises a needle tube front end (101), a needle tube body (103) and a needle tube tail end (104) from top to bottom; the sharp needle core (2) comprises a sharp needle core needle tip (201), a sharp needle core body (202) and a sharp needle core tail end (203) from top to bottom; the blunt needle core (3) comprises a blunt needle core needle tip (301), a blunt needle core body (302) and a blunt needle core tail end (303) from top to bottom; the flat needle core (4) comprises a flat needle core needle head (401) and a flat needle core tail end (402) from top to bottom; the particle implanting device (5) is provided with a particle outlet (501) and a needle core inlet (506) on the outer periphery, and is internally provided with a particle sealing tube (6); the radioactive particle implanting device has the following three states during operation: (i) the sharp needle core (2) is sleeved in the needle tube (1), the sharp needle core tail end (203) is clamped with the needle tube tail end (104), and the sharp needle core needle tip (201) is completely exposed in the needle tube front end (101); (ii) the blunt needle core (3) is sleeved in the needle tube (1), the blunt needle core tail end (303) is clamped with the needle tube tail end (104), and the blunt needle core needle tip (301) is completely exposed in the needle tube front end (101); and / or (iii) the needle tube tail end (104) is clamped on the particle outlet (501), the flat needle core needle head (401) is inserted into the particle implanting device (5) from the needle core inlet (506), the particle sealing tube (6) is pushed out from the particle outlet (501), and the flat needle core (4) is sleeved in the needle tube (1).

2. A radioactive seed implantation device according to claim 1, wherein, The flat needle core needle head (401) is flush with the opening of the needle tube front end (101), and the flat needle core tail end (402) is clamped with the needle core inlet (506).

3. The radioactive seed implant device of claim 1, wherein, The outer side wall of the needle tube body (103) is provided with scale lines (102), and the needle tube front end (101) is flat.

4. The radioactive seed implant device of claim 1, wherein, The sharp needle core needle tip (201) is a triangular pyramid needle tip, and the blunt needle core needle tip (301) is a conical needle tip.

5. The radioactive seed implant device of claim 1, wherein, The particle implanter (5) is composed of a cover plate (508), a particle carousel (502) and a bottom plate (509) from top to bottom, the particle outlet (501) is arranged on the cover plate (508), the needle core inlet (506) is arranged on the bottom plate (509), the bottom plate (509) comprises a first mesa (511) and a second mesa (512), the first mesa (511) is arranged on the second mesa (512), and the diameter of the first mesa (511) is smaller than that of the second mesa (512); the particle implanter (5) further comprises a sleeve ring (510), the sleeve ring (510) is sleeved on the outer periphery of the first mesa (511), and the particle carousel (502) is sleeved on the outer periphery of the sleeve ring (510); the particle carousel (502) is provided with a particle storage bin (507) along the circumference, the particle sealing tube (6) is placed in the particle storage bin (507), and radioactive particles are placed in the particle sealing tube (6).

6. A radioactive seed implantation device according to claim 5, wherein, The particle storage bin (507) is provided with an empty bin.

7. A radioactive seed implantation device according to claim 6, wherein, The outer periphery of the particle carousel (502) is provided with a particle indication line (503), each particle indication line (503) corresponds to the position of the particle storage bin (507), and a firing port indication line (504) is arranged at the position corresponding to the particle outlet (501) on the cover plate (508).

8. A radioactive seed implantation device according to claim 7, wherein, The height of the particle sealing tube (6) is equal to the length of the blunt needle core needle tip (301).

9. The radioactive seed implant device of claim 5, wherein, The particle implanter (5) further comprises a handle (505), and the top end of the handle (505) is connected with the bottom plate (509).

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