A radioactive particle implantation device for tumor treatment

Abstract

This utility model relates to a radioactive particle implantation device for tumor treatment, belonging to the field of medical device technology, and solves the technical problem of push-and-jam during the delivery of radioactive particles in the prior art. This utility model includes a puncture needle, a receiving cavity, a particle boat, and a push-and-jam assembly. The particle boat includes a particle sleeve, a stabilizing sleeve, and a push-and-jam cover. The particle sleeve has a receiving space to accommodate the radioactive particles, directly carrying the radiation source and protecting the particles from mechanical damage during delivery. The stabilizing sleeve keeps the particle sleeve and the radioactive particles it carries always in the center of the receiving cavity, avoiding delivery jamming due to skewness. By coordinating the particle sleeve, stabilizing sleeve, and push-and-jam cover, the radioactive particles do not directly contact the inner wall of the receiving cavity, thereby reducing frictional resistance. The particle sleeve is always in the center of the receiving cavity, reducing unilateral friction between the particle sleeve and the inner wall of the receiving cavity, thus reducing the occurrence of push-and-jam during the delivery of radioactive particles.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a radioactive particle implantation device for tumor treatment. Background Technology

[0002] In the field of modern medicine, cancer has become a major disease threatening human life and health. Patients urgently need treatments that can precisely target tumor cells, effectively prolong life, and have few complications. Radioactive particle implantation therapy is an important cancer treatment method. By directly implanting radioactive particles into tumor tissue, it can precisely kill tumor cells while minimizing damage to surrounding normal tissues. In clinical applications, this treatment method has shown good efficacy and a low incidence of complications for various types of tumors.

[0003] Currently, in clinical practice, a hollow puncture needle is connected to a receiving cavity. Radioactive particles are placed inside the receiving cavity, the puncture needle is inserted into the tissue, and a pusher is used to push the radioactive particles into the tissue. During the delivery of the radioactive particles, due to the pushing force, the radioactive particles are prone to changes in angle and orientation within the receiving cavity, resulting in pushing jamming. This affects the smooth progress of the operation and is very detrimental to the patient's life safety. Utility Model Content

[0004] Based on the above analysis, the present invention aims to provide a radioactive particle implantation device for tumor treatment, in order to solve the technical problem of push-and-jam during the delivery of radioactive particles in the prior art.

[0005] The objective of this utility model is mainly achieved through the following technical solutions:

[0006] A radioactive particle implantation device for tumor treatment includes a puncture needle, a receiving cavity, a particle boat, and a pushing assembly. The puncture needle is used to puncture into tissue and has a hollow channel inside. One end of the receiving cavity is connected to the hollow channel. The particle boat can be placed into the receiving cavity and can move within the receiving cavity and the hollow channel. The pushing assembly extends from the other end of the receiving cavity into the receiving cavity to push the particle boat into the tissue.

[0007] The particle boat includes a particle sleeve, a straightening sleeve, and a pusher cover. The interior of the particle sleeve is used to contain the radioactive particles. The straightening sleeve is disposed on the outside of the particle sleeve to straighten the radioactive particles. The pusher cover is disposed on the particle sleeve for the pusher assembly to push.

[0008] Furthermore, the particle sheath includes a guide head and a particle sheath body connected to the guide head, the guide head being used to guide the movement of the particle sheath body, and the particle sheath body being used to contain the radioactive particles.

[0009] Furthermore, the straightening sleeve includes an elastic collar, the inner ring of which is fitted onto the outer wall of the particle sleeve, and the outer ring of which is in contact with the inner wall of the receiving cavity tube.

[0010] Furthermore, the particle casing includes radial collars and collar connecting rods, the collar connecting rods being connected to a plurality of radial collars to form a cylindrical space, into which the radioactive particles can be placed.

[0011] Furthermore, the push cover includes a cover body, one end of which is connected to the straightening sleeve, and the other end of which is provided with a push groove, and a flexible push pad is provided in the push groove.

[0012] Furthermore, the jacking assembly includes a jacking head, a flexible jacking rod, and a rigid jacking rod connected in sequence. The jacking head is capable of contacting the jacking cover to jack the jacking cover, and the rigid jacking rod is used to apply a jacking force or a pulling force.

[0013] Furthermore, the flexible push rod includes a rod body and a first reinforcing rib embedded in the rod body, wherein the flexibility of the first reinforcing rib is less than that of the rod body.

[0014] Furthermore, the radioactive particle implantation device for tumor treatment also includes a transition cannula disposed between the puncture needle and the receiving lumen to allow the particle boat to enter the puncture needle from the receiving lumen.

[0015] Furthermore, the transition sleeve includes multiple transition sleeve units that overlap sequentially. Each transition sleeve unit includes a tube inlet end, a tube outlet end, and a tube waist. The diameter of the tube inlet end and the tube outlet end is larger than the diameter of the tube waist. The tube inlet end is fixedly disposed on the inner wall of the receiving cavity tube.

[0016] Furthermore, the transition sleeve includes a sleeve body, and a second reinforcing rib is embedded in the sleeve body to prevent radial deformation of the sleeve body.

[0017] The technical solution of this utility model can achieve at least one of the following effects:

[0018] (1) The radioactive particle implantation device for tumor treatment described in this utility model includes a puncture needle, a receiving cavity tube, a particle boat, and a pushing assembly; wherein, the particle boat includes a particle sleeve, a straightening sleeve, and a pushing cover. The particle sleeve has a receiving space to accommodate radioactive particles, directly carries the radioactive source, and protects the particles from mechanical damage during transportation. The straightening sleeve keeps the particle sleeve and the radioactive particles it carries in the center of the receiving cavity tube, avoiding transportation jamming due to skewness. The pushing cover is used to provide a force-bearing surface, uniformly transmitting the pushing force of the pushing assembly to the particle boat, avoiding deformation or jamming of the particle boat due to local force. By coordinating the particle sleeve, the straightening sleeve, and the pushing cover, the radioactive particles do not directly contact the inner wall of the receiving cavity tube, thereby reducing frictional resistance. The particle sleeve is always in the center of the receiving cavity tube, reducing unilateral friction between the particle sleeve and the inner wall of the receiving cavity tube, thereby reducing the situation of pushing jamming during the transportation of radioactive particles.

[0019] (2) The radioactive particle implantation device for tumor treatment described in this utility model includes an elastic collar that is tightly attached to the particle sleeve by radial pressure to ensure synchronous movement of the two. By setting the elastic collar, rigid friction is transformed into elastic contact, reducing pushing resistance. In addition, the ring structure compensates for deformation and processing errors of the cavity tube in real time, improving the passage of complex paths.

[0020] (3) The radioactive particle implantation device for tumor treatment described in this utility model further includes a transition sleeve. The transition sleeve provides a smooth transition channel, allowing the particle boat to smoothly enter the hollow channel of the puncture needle from the receiving cavity. The particle boat will not be obstructed during movement through the transition sleeve, avoiding possible jamming or displacement during the transfer process. This reduces resistance and friction during the operation, making the entire implantation process smoother and more efficient.

[0021] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0022] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0023] Figure 1 This is a cross-sectional structural schematic diagram of the radioactive particle implantation device for tumor treatment in Embodiment 1 of this utility model;

[0024] Figure 2 This is a schematic diagram of the particle boat structure in Embodiment 1 of this utility model;

[0025] Figure 3 This is a schematic diagram of the particle sleeve in Embodiment 1 of this utility model;

[0026] Figure 4 This is a cross-sectional structural diagram of the transition sleeve in Embodiment 2 of this utility model;

[0027] Figure 5 This is a schematic diagram of the transition sleeve unit in Embodiment 2 of this utility model;

[0028] Figure 6 This is a cross-sectional structural diagram of the sleeve body in Embodiment 2 of this utility model.

[0029] Figure label:

[0030] 1-Puncture needle, 11-Hollow channel;

[0031] 2-Accommodation cavity tube;

[0032] 3-Particle boat, 31-Particle sleeve, 311-Guide head, 312-Particle sleeve body, 3121-Radial collar, 3122-Collar connecting rod, 32-Straightening sleeve, 321-Elastic collar, 33-Push cover, 331-Cover body, 3311-Push groove;

[0033] 4-Push assembly, 41-Push head, 42-Flexible push rod, 421-Rod body, 422-First reinforcing rib, 43-Rigid push rod;

[0034] 5-radiated particles;

[0035] 6-Transition sleeve, 61-Transition sleeve unit, 611-Pipe inlet end, 612-Pipe outlet end, 613-Pipe waist, 62-Sleeve body, 63-Second reinforcing rib. Detailed Implementation

[0036] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0037] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments.

[0038] Example 1

[0039] like Figure 1 and Figure 2As shown, this utility model embodiment provides a radioactive particle implantation device for tumor treatment, including a puncture needle 1, a receiving cavity 2, a particle boat 3, and a pushing component 4. The puncture needle 1 is used to puncture into the tissue and has a hollow channel 11 inside. One end of the receiving cavity 2 is connected to the hollow channel 11. The particle boat 3 can be placed into the receiving cavity 2 and can move within the receiving cavity 2 and the hollow channel 11. The pushing component 4 extends into the receiving cavity 2 from the other end of the receiving cavity 2 to push the particle boat 3 into the tissue. The particle boat 3 includes a particle sleeve 31, a straightening sleeve 32, and a pushing cover 33. The inside of the particle sleeve 31 is used to receive radioactive particles 5. The straightening sleeve 32 is disposed on the outside of the particle sleeve 31 to straighten the radioactive particles 5. The pushing cover 33 is disposed on the particle sleeve 31 for the pushing component 4 to push.

[0040] The puncture needle 1 has a sharp puncture tip for inserting into human tissue, such as a tumor. The hollow channel 11 inside the puncture needle 1 serves as a delivery channel, allowing the radioactive particles 5 to be delivered to the tumor site. The receiving cavity 2 serves as a storage and delivery channel for the particle boat 3, ensuring that the particle boat 3 enters the puncture needle 1 from the receiving cavity 2. The particle boat 3 is used to hold the radioactive particles 5 and is made entirely of absorbable material, entering the tissue along with the radioactive particles 5. The pushing component 4 applies a pushing force. Specifically, the particle sleeve 31 has a receiving space to hold the radioactive particles 5, directly carrying the radioactive source (such as iodine-125 particles) and protecting the particles from mechanical damage during delivery. It should be noted that the particle sleeve 31 does not isolate the radioactivity of the radioactive particles 5. The aligning sleeve 32 adopts a ring-shaped elastic structure, adapting to the receiving cavity through elastic deformation. The dimensional differences in the inner wall ensure that the particle sleeve 31 and the radioactive particles 5 it carries are always centered in the receiving cavity 2, avoiding delivery jamming due to skewness. The push cover 33 provides a force-bearing surface, evenly transmitting the thrust of the push assembly 4 to the particle boat 3, avoiding deformation or jamming of the particle boat 3 due to localized force. By coordinating the particle sleeve 31, the straightening sleeve 32, and the push cover 33, the radioactive particles 5 do not directly contact the inner wall of the receiving cavity 2, thereby reducing frictional resistance. The particle sleeve 31 is always centered in the receiving cavity 2, reducing unilateral friction between the particle sleeve 31 and the inner wall of the receiving cavity 2. This reduces the occurrence of push jamming of the radioactive particles 5 during delivery, and thus improves the reliability and clinical applicability of the radioactive particle implantation device for tumor treatment. Compared with the existing technology, it has significant advantages in clinical practice.

[0041] As a consideration for radiation protection, the puncture needle 11 can have a double-layer structure, with the inner layer being a radiation-proof layer to shield radiation and the outer layer being medical stainless steel to ensure mechanical strength; at the same time, the receiving cavity tube 2 can also be equipped with a radiation-proof coating.

[0042] A preferred embodiment of this utility model is as follows: Figure 3As shown, the particle sleeve 31 includes a guide head 311 and a particle sleeve body 312 connected to the guide head 311. The guide head 311 is used to guide the movement of the particle sleeve body 312, and the particle sleeve body 312 is used to contain the radioactive particles 5. The guide head 311 is used to achieve guidance and drag reduction. For example, the guide head 311 adopts a conical or hemispherical structure to reduce the contact area between the front end of the particle sleeve 31 and the inner wall of the receiving cavity 2, thereby reducing frictional resistance. The particle sleeve body 312 holds the radioactive particles 5 through its own elasticity. The guide head 311 reduces the initial propulsion resistance through drag reduction design. The particle sleeve body 312 maintains the stability of the radioactive particles 5 at the rear end of the guide head 311.

[0043] A preferred embodiment of this utility model is as follows: Figure 1 As shown, the straightening sleeve 32 includes an elastic collar 321. The inner ring of the elastic collar 321 is fitted on the outer wall of the particle sleeve 31, and the outer ring of the elastic collar 321 is in contact with the inner wall of the receiving cavity tube 2. The elastic collar 321 and the receiving cavity tube 2 are interference-fitted. Multiple elastic collars 321 are fitted side by side on the outer wall of the particle sleeve 31. They are pressed tightly against the particle sleeve 31 by radial pressure to ensure that the two move synchronously. By setting the elastic collar 321, rigid friction is converted into elastic contact, reducing pushing resistance. In addition, the ring structure compensates for the deformation and processing error of the receiving cavity tube 2 in real time, improving the passage of complex paths.

[0044] A preferred embodiment of this utility model is as follows: Figure 3 As shown, the particle sheath 312 includes radial collars 3121 and collar connecting rods 3122. The collar connecting rods 3122 are connected to multiple radial collars 3121 to form a cylindrical space. The radioactive particles 5 can be placed into the cylindrical space. Through the cooperation of the radial collars 3121 and collar connecting rods 3122, the particle sheath 312 forms a mesh structure, which reduces the coverage of the radioactive particles 5 by the particle sheath 312, thereby reducing the impact on the radiation of the radioactive particles 5.

[0045] A preferred embodiment of this utility model is as follows: Figure 2 As shown, the push cover 33 includes a cover body 331. One end of the cover body 331 is connected to the straightening sleeve 32, and the other end of the cover body 331 is provided with a push groove 3311. A flexible push pad is provided in the push groove 3311. The push groove 3311 cooperates with the push head 41 of the push assembly 4 to ensure that the push head 41 can accurately push the push cover 33, thereby driving the particle boat 3 to move. The flexible push pad can reduce the vibration and wear between the push head 41 and the push cover 33, protect the surface of the push assembly 4 and the push cover 33, and extend the service life of the device. At the same time, the elasticity of the flexible push pad can absorb part of the push force, making the push process more stable.

[0046] A preferred embodiment of this utility model is as follows: Figure 1As shown, the jacking assembly 4 includes a jacking head 41, a flexible jacking rod 42, and a rigid jacking rod 43 connected in sequence. Both the jacking head 41 and the rigid jacking rod 43 can be made of stainless steel. The jacking head 41 can contact the jacking cover 33 to jacking the jacking cover 33. The rigid jacking rod 43 is used to apply jacking force or pulling force. The flexible jacking rod 42 connects the jacking head 41 and the rigid jacking rod 43 and plays the role of transmitting jacking force. The flexibility of the flexible jacking rod 42 allows the jacking assembly 4 to move flexibly in complex paths, adapting to different puncture angles and paths, improving the convenience and adaptability of operation. The rigid jacking rod 43 ensures that a stable thrust can be provided during the jacking process, and can also apply a pulling force to retract the jacking assembly 4 when needed.

[0047] Based on this, the flexible push rod 42 includes a rod body 421 and a first reinforcing rib 422 embedded in the rod body 421. The rod body 421 is made of TPU material, and the first reinforcing rib 422 is made of stainless steel wire. The flexibility of the first reinforcing rib 422 is less than that of the rod body. The first reinforcing rib 422 is used to enhance the bending and tensile resistance of the push rod, prevent the flexible push rod 42 from bending excessively during operation, and improve safety.

[0048] Example 2

[0049] Based on Example 1, such as Figure 4 and Figure 5 As shown, the radioactive particle implantation device for tumor treatment also includes a transition cannula 6. The transition cannula 6 is disposed between the puncture needle 1 and the receiving cavity 2 to allow the particle boat 3 to enter the puncture needle 1 from the receiving cavity 2. The transition cannula 6 provides a smooth transition channel, allowing the particle boat 3 to smoothly enter the hollow channel 11 of the puncture needle 1 from the receiving cavity 2. The particle boat 3 is not obstructed during movement through the transition cannula 6, avoiding possible jamming or displacement during transfer. Thus, the resistance and friction during the operation are reduced, making the entire implantation process smoother and more efficient.

[0050] A preferred embodiment of this utility model is as follows: Figure 4 and Figure 5As shown, the transition sleeve 6 includes multiple sequentially overlapping transition sleeve units 61. Each transition sleeve unit 61 includes an inlet end 611, an outlet end 612, and a waist 613. The diameters of the inlet end 611 and the outlet end 612 are larger than the diameter of the waist 613. The inlet end 611 is fixedly disposed on the inner wall of the receiving cavity tube 2 and / or the puncture needle 1. Through the sequential overlapping of multiple transition sleeve units 61, the sequentially overlapping transition sleeve units 61 allow the transition sleeve 6 to deform while ensuring the unobstructed passage. The transition sleeve 6 provides a gradual passage, allowing the particle boat 3 to enter from one transition sleeve unit 61 to another more smoothly. Thus, the puncture needle 1 enters through the receiving cavity tube 2. In this preferred embodiment, the transition sleeve 6 can be made of polytetrafluoroethylene.

[0051] A preferred embodiment of this utility model is as follows: Figure 6 As shown, the transition cannula 6 includes a cannula body 62, and a second reinforcing rib 63 is embedded in the cannula body 62 to prevent radial deformation of the cannula body 62. The cannula body 62 provides an internal channel, allowing the particle boat 3 to smoothly enter the hollow channel 11 of the puncture needle 1 from the receiving cavity tube 2. The second reinforcing rib 63 is embedded in the cannula body 62 to prevent radial deformation of the cannula body 62, preventing deformation of the receiving cavity tube 2 from squeezing the cannula body 62 and causing deformation of the cannula body 62, thus affecting the passage of the cannula body 62. At the same time, the second reinforcing rib 63 also enhances the overall strength and stability of the transition cannula 6. In this preferred embodiment, the cannula body 62 can be made of TPU material, and the second reinforcing rib 63 can be made of stainless steel.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A radioactive particle implantation device for tumor treatment, characterized in that, The device includes a puncture needle, a receiving cavity, a particle boat, and a pushing assembly. The puncture needle is used to puncture into tissue and has a hollow channel inside. One end of the receiving cavity is connected to the hollow channel. The particle boat can be placed into the receiving cavity and can move within the receiving cavity and the hollow channel. The pushing assembly extends into the receiving cavity from the other end of the receiving cavity to push the particle boat into the tissue. The particle boat includes a particle sleeve, a straightening sleeve, and a pusher cover. The interior of the particle sleeve is used to contain the radioactive particles. The straightening sleeve is disposed on the outside of the particle sleeve to straighten the radioactive particles. The pusher cover is disposed on the particle sleeve for the pusher assembly to push.

2. The radioactive particle implantation device for tumor treatment according to claim 1, characterized in that, The particle sheath includes a guide head and a particle sheath body connected to the guide head. The guide head is used to guide the movement of the particle sheath body, and the particle sheath body is used to contain the radioactive particles.

3. The radioactive particle implantation device for tumor treatment according to claim 1, characterized in that, The straightening sleeve includes an elastic collar, the inner ring of which is fitted onto the outer wall of the particle sleeve, and the outer ring of which is in contact with the inner wall of the receiving cavity tube.

4. The radioactive particle implantation device for tumor treatment according to claim 2, characterized in that, The particle casing includes radial collars and collar connecting rods, the collar connecting rods being connected to multiple radial collars to form a cylindrical space, into which the radioactive particles can be placed.

5. The radioactive particle implantation device for tumor treatment according to claim 1, characterized in that, The push cover includes a cover body, one end of which is connected to the straightening sleeve, and the other end of which is provided with a push groove, and a flexible push pad is provided in the push groove.

6. The radioactive particle implantation device for tumor treatment according to claim 1, characterized in that, The jacking assembly includes a jacking head, a flexible jacking rod, and a rigid jacking rod connected in sequence. The jacking head can contact the jacking cover to jack the jacking cover, and the rigid jacking rod is used to apply a jacking force or a pulling force.

7. The radioactive particle implantation device for tumor treatment according to claim 6, characterized in that, The flexible push rod includes a rod body and a first reinforcing rib embedded in the rod body, wherein the flexibility of the first reinforcing rib is less than that of the rod body.

8. The radioactive particle implantation device for tumor treatment according to claim 1, characterized in that, The radioactive particle implantation device for tumor treatment further includes a transition cannula disposed between the puncture needle and the receiving lumen to allow the particle boat to enter the puncture needle from the receiving lumen.

9. The radioactive particle implantation device for tumor treatment according to claim 8, characterized in that, The transition sleeve includes multiple transition sleeve units that are sequentially overlapped. Each transition sleeve unit includes a pipe inlet end, a pipe outlet end, and a pipe waist. The pipe diameter of the pipe inlet end and the pipe outlet end is larger than the pipe waist diameter. The pipe inlet end is fixedly disposed on the inner wall of the receiving cavity tube.

10. The radioactive particle implantation device for tumor treatment according to claim 8, characterized in that, The transition sleeve includes a sleeve body, and a second reinforcing rib is embedded in the sleeve body to prevent radial deformation of the sleeve body.

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