Radioactive particle protection implanter for tumor treatment

Abstract

The invention discloses a radioactive particle protection implanting device for tumor treatment. The radioactive particle protection implanting device comprises an implanting gun body, a puncture needle, a loading assembly and a push rod matched with the puncture needle. The loading assembly is detachably installed on the surface of the implantation gun body, a bullet loading box and a rotatable rotating wheel are arranged in the loading assembly, a loading groove is formed in the periphery of the rotating wheel, and through holes are formed in the surface of the shielding protection plate and used for achieving one-by-one alignment and shielding protection of radioactive particles. A trigger, a fixed assisting block, a movable assisting block, an elastic piece and an engaging lug are arranged in the implantation gun body, the push rod is driven to linearly advance through the connecting rod and the sliding lug, one-way limiting is achieved under the clamping action of the engaging lug, and reverse sliding of the push rod is prevented. The guide cylinder is used for guiding the push rod to enter the puncture needle and accurately implanting particles into tumor tissue. The device is provided with a rotary missile cabin type protection structure, an anti-non-return gun type propelling structure and a detachable modular loading assembly, radiation leakage can be effectively avoided, it is guaranteed that particle implantation is accurate and reliable, replacement is rapid, and the device has high clinical application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of xx, in particular to a tumor treatment radioactive particle protection implant device. BACKGROUND

[0002] At present, radioactive particle implantation is a common local radiotherapy method in tumor treatment. In clinical practice, small particles such as radioactive iodine-125 are usually accurately delivered into tumor tissues by a dedicated particle implant device to achieve continuous local irradiation. Although the existing technical solutions have achieved particle implantation operation to some extent, there are still obvious deficiencies in safety, stability and convenience.

[0003] In a typical structure, the particle loading cavity is usually a single-layer metal container, and the particles are directly stored in the cavity. Due to the lack of effective multi-layer shielding design, radiation leakage may occur when the particles are not released, resulting in unnecessary radiation exposure to the operator during operation and posing a safety hazard.

[0004] In terms of pushing mechanism, the existing implant device usually adopts a single push rod straight pushing structure, which relies on manual pushing of the push rod to complete particle delivery. This kind of structure is prone to problems such as unstable pushing force and poor precision control when implanting particles one by one, resulting in uneven particle implantation depth or inaccurate positioning.

[0005] In terms of operation mode, the particles of the existing device are usually filled in batches, and the loading assembly and the implant gun body are integrated, so that the particles need to be replaced or supplemented by disassembling the whole device, which is complex and time-consuming. Especially in a clinical environment, doctors need to quickly complete the one-by-one implantation of particles, but the existing device cannot achieve efficient particle switching and quick replacement, increasing the operation time and operation burden. SUMMARY

[0006] The present application aims to solve one of the technical problems in the prior art or related art.

[0007] To this end, the technical solution adopted by the present application is as follows: a tumor treatment radioactive particle protection implant device, comprising an implant gun body, a puncture needle, a loading assembly and a push rod matched with the puncture needle, the loading assembly being detachably installed on the surface of the implant gun body, one end of the implant gun body being provided with a connecting buckle matched with the end of the puncture needle, the inner side of the implant gun body being provided with a trigger, a fixed block, a movable block, an elastic member and a toothed structure, the push rod penetrating through the above-mentioned components and entering the inside of the puncture needle through a guide cylinder, for pushing radioactive particles to be implanted into tumor tissues one by one.

[0008] In a preferred example, the loading assembly further comprises a cartridge and a rotating wheel rotatably installed on the inner side of the cartridge, the outer periphery of the rotating wheel is provided with a plurality of loading grooves, and the surface of the shielding plate is provided with a through hole. When the rotating wheel rotates, a loading groove is aligned with the through hole, thereby realizing the communication between the particles and the port of the guide cylinder.

[0009] Specifically, the design can place the misaligned particles in a shielding state, effectively avoid radiation leakage, and ensure the safety of the operation process.

[0010] In a preferred example, the cartridge and the shielding plate adopt a multi-layer structure of tungsten alloy or lead-based composite shielding material, and a medical stainless steel or polycarbonate coating is provided on the outer layer.

[0011] Specifically, the material structure can improve the radiation shielding performance, while meeting the biocompatibility requirements of medical devices, ensuring the long-term stability and reliability of the device during clinical use.

[0012] In a preferred example, the outer surface of the push rod is provided with a tooth groove in the axial direction, the surface of the fixed block and the movable block is provided with a through hole, and V-shaped spring-shaped teeth are arranged on both sides of the through hole.

[0013] Specifically, this structure allows free passage when the push rod advances, and forms a stop when the push rod retreats, thereby preventing the particles from sliding out in reverse, ensuring the stability and accuracy of particle implantation.

[0014] In a preferred example, the elastic member is a spring leaf or a coil spring installed at both ends of the fixed block and the movable block, used to provide the reset elastic force of the movable block.

[0015] Specifically, this design can ensure that the movable block is automatically reset after the trigger is released, thereby realizing continuous implantation operation and improving work efficiency.

[0016] In a preferred example, the guide cylinder adopts a double-tube sleeve structure, the outer tube is fixedly installed on the inner side of the implantation gun body, and the inner tube can be replaced as needed.

[0017] Specifically, this structure not only ensures the stability of the guide during the movement of the push rod, but also can adapt to different specifications of the puncture needle, improving the universality of the device.

[0018] In a preferred example, one end of the trigger is connected to the sliding ear through a connecting rod, the connecting point of the connecting rod deviates from the fixed axis of the trigger, and a sliding groove is provided on the inner side of the implantation gun body for guiding the linear sliding of the movable block and the sliding ear.

[0019] Specifically, this structure uses the lever deflection effect to improve the driving force of the trigger on the push rod, and at the same time ensures the accuracy of the push rod advancement through the sliding groove.

[0020] In a preferred example, the puncture needle and the push rod are made of medical-grade titanium alloy or stainless steel material, and the end of the puncture needle is provided with a detachable fastener structure.

[0021] Specifically, the material selection ensures the strength and corrosion resistance of the components, which are suitable for repeated disinfection in clinical applications, and the detachable fastener improves the convenience of replacement and maintenance.

[0022] In a preferred example, the shaft of the rotating wheel is provided with a rotating shaft rod penetrating the bullet carrier, one end of the rotating shaft rod is provided with a hand crank, the surface of the rotating wheel is provided with a positioning hole, and the inner side of the bullet carrier is provided with an elastic positioning pin corresponding to the positioning hole.

[0023] Specifically, the positioning structure can ensure the accurate positioning of the rotating wheel after rotation, avoid the deviation of the rotating wheel, and ensure that each particle is accurately aligned with the through hole, thereby ensuring the reliability of the implantation.

[0024] In summary, the present application realizes the safety protection, accurate implantation and rapid switching of radioactive particles through the rotating bullet cabin loading structure, gun-type propulsion mechanism and modular loading assembly design, which not only solves the problems of radiation leakage, unstable implantation and complicated operation in the prior art, but also improves the efficiency and safety of the surgical process, and has significant practical value and clinical promotion significance.

[0025] The beneficial effects obtained by the present application are: 1. In the present application, a rotating wheel is arranged in the bullet carrier, and a shielding shield is arranged on the outside to form a structure similar to a rotating bullet cabin. The misaligned particles are always in a shielding state, effectively avoiding the radiation leakage of radioactive particles, and significantly improving the protection safety during clinical use.

[0026] 2. In the present application, the trigger, connecting rod, dynamic block, static block and meshing teeth cooperate to drive the push rod to stably advance in a straight line, forming a mechanical transmission structure similar to a gun. This structure can ensure that the radioactive particles are accurately implanted one by one into the tumor tissue, prevent reverse movement during the push rod retraction process, and perform step-by-step peristalsis of the push rod, thereby improving the stability and precision of the implantation operation.

[0027] 3. In the present application, the modular loading assembly is detachably installed on the surface of the implantation gun body, and the rotating wheel is accurately positioned by the rotating shaft rod, so that the operation is simple and the maintainability is strong. In clinical applications, the loading assembly can be quickly replaced, which shortens the operation preparation and operation time, and has good practical value. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 The schematic diagram of the mounting structure of the implant gun body and the loading assembly of one embodiment of the present application; Figure 3 The schematic diagram of the internal structure of the implant gun body of one embodiment of the present application; Figure 4 The schematic diagram of the trigger and the moving block linkage structure of one embodiment of the present application; Figure 5 The schematic diagram of the fixed block and the moving block structure of one embodiment of the present application; Figure 6 The schematic diagram of the internal structure of the fixed block and the moving block of one embodiment of the present application; Figure 7 The schematic diagram of the toothed ear structure of one embodiment of the present application; Figure 8 The schematic diagram of the exploded structure of the loading assembly of one embodiment of the present application; Figure 9 The schematic diagram of the surface structure of the rotating wheel of one embodiment of the present application.

[0029] Reference signs: 100, implant gun body; 110, trigger; 120, guide cylinder; 130, fixed block; 140, moving block; 150, elastic member; 111, connecting rod; 112, sliding ear; 141, toothed ear; 200, puncture needle; 210, push rod; 300, loading assembly; 310, cartridge; 320, rotating wheel; 330, shielding plate; 321, rotating shaft rod. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the present application is further described in detail below in combination with specific embodiments and with reference to the drawings. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0031] It is understood that the above description is only exemplary and is not intended to limit the scope of the present application.

[0032] Some embodiments of the present application provide a tumor treatment radioactive particle protection implant device.

[0033] In combination with Figures 1-9 As shown in the drawings, the tumor treatment radioactive particle protection implant device provided by the present application comprises an implant gun body 100, a puncture needle 200, a loading assembly 300 and a push rod 210 matched with the puncture needle 200.

[0034] The loading assembly 300 is detachably mounted on the surface of the implant gun body 100, facilitating quick replacement after the radioactive particles are exhausted. One end of the implant gun body 100 is provided with a connecting buckle matched with the end of the puncture needle 200, for realizing quick assembly and disassembly of the puncture needle 200.

[0035] The trigger 110 is rotatably mounted on the inner side of the implant gun body 100, and the fixed block 130 is fixedly mounted on the inner side of the implant gun body 100. The moving block 140 is slidably mounted on the inner side of the implant gun body 100, the fixed block 130 and the moving block 140 are oppositely arranged, and the two ends are respectively connected with the elastic members 150 for ensuring the reset of the moving block 140. The inner sides of the fixed block 130 and the moving block 140 are respectively provided with the meshing teeth 141, forming the one-way limiting action on the push rod 210.

[0036] The guide cylinder 120 is fixedly mounted on the inner side of the implant gun body 100 and located on both sides of the loading assembly 300. The push rod 210 penetrates the inner sides of the fixed block 130, the moving block 140 and the loading assembly 300, and enters the inner side of the puncture needle 200 through the guide cylinder 120, for pushing the radioactive particles into the tumor tissue.

[0037] One end of the trigger 110 is rotatably connected with the connecting rod 111, and the sliding ear 112 fixed to the inner side of the moving block 140 is slidably mounted on the inner side of the implant gun body 100. The two ends of the connecting rod 111 are respectively rotatably connected with the trigger 110 and the sliding ear 112. In the deflection movement process of the trigger 110, the sliding ear 112 and the moving block 140 are driven to realize the linear sliding relative to the fixed block 130, thereby pushing the push rod 210 to move along the direction of the puncture needle 200.

[0038] The loading assembly 300 comprises the bullet magazine 310 and the rotating wheel 320 rotatably mounted on the inner side of the bullet magazine 310. The bullet magazine 310 is provided with the shielding guard plate 330 on both sides, for shielding the radiation of the unreleased radioactive particles.

[0039] In this embodiment, a plurality of loading grooves are evenly arranged on the outer peripheral surface of the rotating wheel 320, each of which is used for accommodating one radioactive iodine-125 particle. The shielding guard plate 330 is provided with a through hole, and the loading groove and the through hole are switched to be in alignment when the rotating wheel 320 rotates. When the loading assembly 300 and the implant gun body 100 are in the connected state, the through hole is connected with the port of the guide cylinder 120 on the inner side of the implant gun body 100, thereby ensuring that the particles can smoothly enter the inner side of the puncture needle 200 under the pushing of the push rod 210.

[0040] In this embodiment, the cartridge 310 and the shielding plate 330 adopt a multi-layer structure of tungsten alloy or lead-based composite shielding material, and are coated with medical stainless steel or polycarbonate coating on the outer surface. This structure can effectively shield radiation leakage and avoid radiation damage to the operator, and ensure that the overall structure has biocompatibility and corrosion resistance, and is suitable for repeated disinfection and use in clinical environment.

[0041] In this embodiment, the surface of the push rod 210 is provided with a plurality of arranged tooth grooves in the axial direction. The surface of the fixed block 130 and the movable block 140 is provided with a through hole for the push rod 210 to penetrate, and a V-shaped elastic ear-shaped tooth 141 is arranged on both sides of the through hole. When the push rod 210 moves in the forward direction, the tooth 141 is elastically deformed under the force to allow the tooth 141 to pass through, and when the push rod 210 has a back-off tendency, the tooth 141 is engaged and locked with the tooth groove, thereby preventing the reverse sliding of the push rod 210 and ensuring the one-way stability of the implantation process.

[0042] In this embodiment, the elastic member 150 is a spring sheet or a spiral spring, which is respectively installed at both ends of the fixed block 130 and the movable block 140. The elastic member 150 is compressed when the push rod 210 advances, and can provide a reset elastic force after the trigger 110 is released, so that the movable block 140 returns to the initial position, ensuring the reliability of continuous operation.

[0043] In this embodiment, the guide cylinder 120 is a double sleeve structure, which is fixedly installed inside the implantation gun body 100 and located on both sides of the loading assembly 300. The double sleeve structure can enhance the stability of the guide, avoid the shaking of the push rod 210 during movement, and ensure that the radioactive particles can accurately enter the puncture needle 200.

[0044] In this embodiment, the connecting rod 111 is a connecting rod sheet structure, and the two ends thereof are respectively connected with the trigger 110 and the sliding ear 112 through a pin shaft. The connecting point of the connecting rod 111 and the trigger 110 is intentionally offset from the axis of the connecting point of the trigger 110 and the inside of the implantation gun body 100, forming a mechanical deflection structure, thereby improving the linear driving force of the movable block 140. The inside of the implantation gun body 100 is provided with a sliding groove for guiding the sliding direction of the movable block 140 and the sliding ear 112 relative to the fixed block 130, ensuring the movement accuracy.

[0045] In this embodiment, the puncture needle 200 and the push rod 210 are made of medical-grade titanium alloy or stainless steel material, which has excellent mechanical strength, corrosion resistance and biocompatibility. The end of the puncture needle 200 is provided with a detachable fastener structure, which is connected with the end of the implantation gun body 100, so as to facilitate installation and disassembly, and ensure the replaceability and safety in the surgical environment.

[0046] In this embodiment, the shaft center of the rotating wheel 320 is provided with a rotating shaft rod 321, which penetrates the bullet carrier 310 and is provided with a hand crank at one end, facilitating manual rotation operation. The surface of the rotating wheel 320 is provided with a plurality of positioning holes, and the inner side of the bullet carrier 310 is provided with elastic positioning pins arranged opposite to the positioning holes. Each positioning hole corresponds to a loading groove of the rotating wheel 320, and when the rotating wheel 320 rotates, the positioning pin is clamped into the corresponding positioning hole, so that the accurate positioning of each radioactive particle loading groove is realized, the error accumulation is avoided, and the stability of each implantation is ensured.

[0047] The working principle and use process of the present application are as follows: The tumor treatment radioactive particle protection implantation device of the present application is provided with a rotatable rotating wheel 320 inside the bullet carrier 310, a plurality of radioactive iodine-125 particles are loaded on the outer periphery thereof, and radiation shielding is performed by the shielding panel 330. By manually rotating the rotating wheel 320, a certain particle can be aligned with the through hole on the shielding panel 330, thereby being connected in communication with the port of the guide cylinder 120.

[0048] During operation, the push rod 210 penetrates the guide cylinder 120 and enters the inside of the puncture needle 200, and the reciprocating motion of the driving block 140 relative to the fixed block 130 is driven by the trigger 110. Under the clamping action of the meshing tooth ear 141, the push rod 210 realizes stable one-way linear pushing, and the aligned radioactive particles are sent one by one into the inside of the puncture needle 200, and finally implanted into the tumor site. The structure of the meshing tooth ear 141 can prevent the reverse movement of the push rod 210 during the retreat process, ensuring the accuracy and reliability of particle implantation.

[0049] Use process Loading and protection: a plurality of radioactive particles are preloaded on the surface of the rotating wheel 320 of the bullet carrier 310 during the production stage, and after loading is completed, the shielding panel 330 shields the particles that are not aligned to avoid radiation leakage.

[0050] Alignment switching: manually rotate the rotating wheel 320 to align one of the particles with the through hole of the shielding panel 330 and the guide cylinder 120.

[0051] Implantation operation: the operator presses the trigger 110 to drive the connecting rod 111 and the sliding ear 112, and pushes the driving block 140 to move linearly relative to the fixed block 130, thereby driving the push rod 210 to implant the particles into the tumor site through the guide cylinder 120 and the puncture needle 200.

[0052] Single particle completion: after the implantation of a single particle is completed, the operator retreats the push rod 210 to the outside of the loading assembly 300 through the pull ring.

[0053] Repeat operation: by the shaft rod 321 manual operation deflection again rotating the rotating wheel 320, switching the next particle and shielding the surface of the hole plate 330 alignment, repeat the above implantation process, until the completion of all particle implantation can switch the next loading assembly 300.

[0054] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A tumor treating radioactive seed guard implantor, comprising: The implant gun body (100), the puncture needle (200), the loading assembly (300) and the push rod (210) matched with the puncture needle (200), the loading assembly (300) is detachably mounted on the surface of the implant gun body (100), one end of the implant gun body (100) is provided with a connecting buckle matched with the end of the puncture needle (200), The inside of the implant gun body (100) is rotatably provided with a trigger (110), and the inside of the implant gun body (100) is fixedly provided with a fixed block (130), the inside of the implant gun body (100) is slidably provided with a movable block (140), the fixed block (130) and the movable block (140) are oppositely arranged, and the two ends of the fixed block (130) and the movable block (140) are connected with elastic members (150), the inside of the fixed block (130) and the movable block (140) is provided with a meshing tooth ear (141), the inside of the implant gun body (100) is fixedly provided with guide cylinders (120) located on both sides of the loading assembly (300), the push rod (210) penetrates the inside of the fixed block (130), the movable block (140) and the loading assembly (300) and passes through the guide cylinder (120) into the inside of the puncture needle (200). One end of the trigger (110) is rotatably connected with a connecting rod (111), the inside of the implant gun body (100) is slidably provided with a sliding ear (112) fixed to the inside of the movable block (140), and the two ends of the connecting rod (111) are rotatably connected with the surfaces of the trigger (110) and the sliding ear (112) respectively.

2. The tumor treating radioactive seed implanter of claim 1, wherein, The connecting rod (111) is a connecting rod piece structure, the two ends of the connecting rod (111) are rotatably connected with the trigger (110) and the sliding ear (112) through a pin shaft, the connecting point of the connecting rod (111) and the trigger (110) deviates from the shaft center of the connecting point of the trigger (110) and the inside of the implant gun body (100), and the inside of the implant gun body (100) is provided with a sliding groove for guiding the sliding of the movable block (140) and the sliding ear (112) relative to the surface direction of the fixed block (130).

3. The tumor treating radioactive seed implanter of claim 2, wherein, The elastic members (150) are spring sheets or spiral springs, which are respectively arranged at the two ends of the fixed block (130) and the movable block (140).

4. The tumor treating radiation seed implanter of claim 1, wherein, The guide cylinder (120) is a double-tube sleeve structure, which is fixed to the inside of the implant gun body (100) and located on both sides of the loading assembly (300).

5. The tumor treating radioactive seed implanter of claim 1, wherein, The surface of the push rod (210) is provided with a plurality of tooth grooves arranged along the axial direction, the surface of the fixed block (130) and the movable block (140) is provided with a through hole for the push rod (210) to pass through, the meshing tooth ear (141) is a V-shaped spring piece structure, which is oppositely arranged on both sides of the through hole and forms a meshing stop with the outer wall of the push rod (210).

6. The tumor treating radiation seed implanter of claim 1, wherein, The puncture needle (200) and the push rod (210) are made of medical-grade titanium alloy or stainless steel material, and the end of the puncture needle (200) is provided with a detachable buckle structure connected with the end of the implant gun body (100).

7. The tumor treating radiation seed implanter of claim 1, wherein the guide tube is a hollow tube having a diameter of about 0.5 mm to about 1.5 mm. ​ 8. The tumor treating radiation seed implanter of claim 1, wherein, The loading assembly (300) comprises a cartridge (310) and a rotating wheel (320) rotatably installed inside the cartridge (310), both sides of the cartridge (310) are provided with shielding guards (330), the outer circumferential surface of the rotating wheel (320) is provided with a plurality of uniformly distributed loading grooves for accommodating radioactive particles, the surface of the shielding guard (330) is provided with a through hole which is in switching position with the loading groove, and in the connected state of the loading assembly (300) and the implant gun body (100), the through hole is connected with the end of the guide cylinder (120) inside the implant gun body (100).

9. The tumor treating radioactive seed implanter of claim 8, wherein, The cartridge (310) and the shielding guard (330) are multilayer structures of tungsten alloy or lead-based composite shielding materials, and are coated with medical stainless steel or polycarbonate coating.

10. The tumor treating radioactive seed implanter of claim 8, wherein, The rotating wheel (320) is provided with a rotating shaft rod (321) penetrating the cartridge (310) at the shaft center, one end of the rotating shaft rod (321) is provided with a hand crank, the surface of the rotating wheel (320) is provided with positioning holes, and the inside of the cartridge (310) is provided with elastic positioning pins arranged in the corresponding positioning holes, and each positioning hole corresponds to the loading groove on the surface of the rotating wheel (320).

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