Radioactive particle and bone cement injection device

Abstract

The invention relates to the technical field of medical instruments, in particular to a radioactive particle and bone cement injection device which comprises a tube seat and a pushing injection tube fixed to the bottom of the tube seat, and the tube seat is provided with a radioactive particle filling mechanism and a bone cement injection opening. And the injection pipe comprises a radioactive particle channel and a bone cement channel which are respectively communicated with the radioactive particle filling mechanism and the bone cement injection port. Combined use of radiation particle implantation and bone cement injection in the vertebroplasty can be achieved, and the device is suitable for vertebral tumor treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a radioactive particle and bone cement injection device. Background Art

[0002] Among orthopedic diseases, malignant tumors have become one of the greatest threats to human health. Currently, most patients who can be clearly diagnosed clinically are already in the mid-to-late stage, and many are beyond the window of opportunity for surgery, resulting in significantly shortened survival and diminished quality of life. Interstitial brachytherapy with radioactive seed implants is a rapidly developing new technology in recent years. The local dose to the lesion where the radioactive seeds are located is high, while the surrounding dose rapidly decays, effectively sparing surrounding normal tissue.

[0003] Combining bone cement injection with radioactive seed implantation is undoubtedly the optimal treatment for vertebral tumors. However, maintaining the correct position of the radioactive ions during surgery is crucial. Currently used seed guns are typically used to implant radioactive seeds into soft tissue and cannot be used to inject bone cement simultaneously, making them unsuitable for vertebral tumor treatment. Therefore, a dedicated instrument for vertebral tumor radioactive seed implantation is needed, particularly one that has not been combined with bone cement injection for vertebroplasty. Summary of the Invention

[0004] To solve the problems in the background technology, the present invention proposes a radioactive particle and bone cement injection device, including a tube seat and a push tube fixed to the bottom of the tube seat, the tube seat is respectively provided with a radioactive particle loading mechanism and a bone cement injection port, and the push tube includes a radioactive particle channel and a bone cement channel respectively connected to the radioactive particle loading mechanism and the bone cement injection port. Preferably, the radioactive particle loading mechanism includes a clip and a particle push rod, wherein a placement slot for placing radioactive particles is provided in the clip, a limit block is provided at one end of the clip, and the other end of the clip is elastically connected to the particle push rod via an elastic member, and an injection channel is provided on the clip that is connected to the placement slot and the radioactive particle channel, and the radial dimension of the injection channel is not less than the radial dimension of the radioactive particles; When radioactive particles are placed in the placement groove, the radioactive particles are located between the particle push rod and the limit block. The particle push rod applies thrust to the radioactive particles under the elastic force of the elastic member, and the radioactive particles are clamped between the particle push rod and the limit block. The injection channel corresponds to a position of the radioactive particle.

[0005] Preferably, there are two injection channels, and the two injection channels are symmetrically distributed on both sides of the magazine; A push rod opening is provided on the top of the tube seat, and a push rod is slidably connected to the push rod opening. The radial dimension of the push rod is not larger than the radial dimension of the injection channel. The two injection channels are respectively connected to the radiation particle channel and the push rod opening. The length of the push rod is not less than the distance from the top surface of the push rod opening to the bottom surface of the injection tube. The two injection channels, the push rod and the radiation particle channel are coaxial.

[0006] Preferably, a clip opening is provided on one side of the tube seat, and one end of the clip provided with a limit block is inserted into the tube seat through the clip opening.

[0007] Preferably, the top end of the push rod is located outside the tube seat, and a hand-held portion is provided on the top of the push rod.

[0008] Preferably, a handle is provided on one side of the tube seat.

[0009] Preferably, the bone cement injection port includes an injection connector and an injection channel, the injection channel is located in the injection connector, and one end of the injection channel is connected to the bone cement channel.

[0010] Preferably, the injection tube includes a bone cement injection tube and a particle implantation tube arranged in parallel, the particle implantation tube is arranged on one side of the bone cement injection tube, and the radiation particle channel and the bone cement channel are respectively located in the particle implantation tube and the bone cement injection tube.

[0011] The beneficial effects of the present invention are: The present invention provides both a bone cement channel and a radioactive particle channel, enabling the radioactive particle loading mechanism to selectively implant radioactive particles during bone cement injection. The viscous bone cement can push the radioactive particles to the outside, and the radioactive particles can be encapsulated by the bone cement. The injection device of the present invention can be handheld, and the insertion depth and direction of the injection device can be easily adjusted during injection, thereby achieving the purpose of placing the radioactive particles in the planned position and fixing them during surgery. The present invention can realize the combined use of radioactive particle implantation and bone cement injection during vertebroplasty, and is suitable for the treatment of vertebral tumors. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the assembly relationship between the tube seat, the bone cement injection device, the push rod and the magazine of the present invention; Figure 3 This is a cross-sectional view of the tube base structure of the present invention; Figure 4 for Figure 3 Section AA in; Figure 5 This is a schematic diagram of the structure of the radioactive particle loading mechanism of the present invention.

[0013] Numbers in the figure: 1. injection tube; 011. seed implantation tube; 012. bone cement injection tube; 2. tube seat; 3. holding handle; 4. injection connector; 5. magazine opening; 6. push rod opening; 7. injection channel; 8. bone cement injection device; 9. push rod; 10. handheld part; 11. magazine; 12. radioactive seeds; 13. injection channel; 14. seed push rod; 15. limit block; 16. placement slot; 17. bone cement channel; 18. radioactive seed channel. DETAILED DESCRIPTION

[0014] In order to make the present invention clearer and more understandable, the technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the given embodiment is only one of the implementation methods and does not represent all embodiments.

[0015] In this article, terms such as "inside, outside, up, and down" are established based on the positional relationships shown in the drawings. Depending on the different drawings, the corresponding positional relationships may also change accordingly. Therefore, they cannot be understood as absolute limitations on the scope of protection.

[0016] Combined with attachment Figure 1 -Attached Figure 5 A device for injecting radioactive particles and bone cement comprises a tube holder 2 and a push tube 1 fixed to the bottom of the tube holder 2. The tube holder 2 is provided with a radioactive particle loading mechanism and a bone cement injection port. The push tube 1 includes a radioactive particle channel 18 and a bone cement channel 17, which are connected to the radioactive particle loading mechanism and the bone cement injection port, respectively. The bone cement injection port is used to receive bone cement, allowing the bone cement to enter the surgical area through bone cement channel 17. The bone cement injection port can be connected to a bone cement injection device 8.

[0017] Specifically, the radioactive particle loading mechanism includes a clip 11 and a particle push rod 14. The clip 11 is provided with a placement groove 16 for placing radioactive particles 12. A limit block 15 is provided at one end of the clip 11. The other end of the clip 11 is elastically connected to the particle push rod 14. The clip 11 is provided with an injection channel 13 connected to the placement groove 16 and the radioactive particle channel 18. The radial dimension of the injection channel 13 is not less than the radial dimension of the radioactive particles 12, so that the radioactive particles 12 can pass through the injection channel 13 and enter the radioactive particle channel 18; a plurality of radioactive particles 12 can be placed in the placement groove 16, and the plurality of radioactive particles 12 are arranged one by one between the particle push rod 14 and the limit block 15.

[0018] When a radioactive particle 12 is placed in the placement groove 16, the radioactive particle 12 is located between the particle push rod 14 and the limit block 15. The particle push rod 14 applies a thrust to the radioactive particle 12 under the elastic force of the elastic member, and the radioactive particle 12 is clamped between the particle push rod 14 and the limit block 15. The injection channel 13 corresponds to the position of one of the radioactive particles 12.

[0019] More specifically, there are two injection channels 13, and the two injection channels 13 are symmetrically distributed on both sides of the magazine 11; A push rod opening 6 is provided on the top of the tube seat 2, and a push rod 9 is slidably connected to the push rod opening 6. The radial dimension of the push rod 9 is not larger than the radial dimension of the injection channel 13. The two injection channels 13 are respectively connected to the radiation particle channel 18 and the push rod opening 6. The push rod 9 is at least as long as the distance from the top of the push rod opening 6 to the bottom of the injection tube 1, ensuring that the push rod 9 can push the radioactive particles 12 out of the injection tube 1 and into the surgical area. After the cartridge 11 is connected to the tube holder 2, the two injection channels 13, the push rod 9, and the radioactive particle channel 18 are coaxial.

[0020] When a radioactive particle 12 is placed in placement slot 16, it is clamped between particle push rod 14 and stop block 15. When it is time to implant a radioactive particle 12, push rod 9 pushes the radioactive particle 12 located in injection channel 13 into particle channel 18. Then, through particle channel 18, it is pushed out of injection tube 1 and reaches the surgical area. After retracting push rod 9, particle push rod 14, under the elastic force of the elastic member, moves toward stop block 15, pushing the next radioactive particle 12 to injection channel 13 for implantation. When implanting a radioactive particle 12, the user only needs to operate push rod 9 to implant the particle 12 into the surgical area, eliminating the need to prepare for the next implantation of the particle 12. This improves work efficiency and convenience.

[0021] More specifically, the elastic member is a spring, and the particle push rod 14 is connected to the clip 11 via the spring. The direction of spring expansion and contraction is the same as the direction of movement of the particle push rod 14. When the spring is in a natural state, the distance between the end of the particle push rod 14 close to the limit block 15 and the limit block 15 is less than the radial dimension of a radioactive particle 12. When a radioactive particle 12 is placed between the particle push rod 14 and the limit block 15, the particle push rod 14 moves away from the limit block 15, the spring is compressed, and the particle push rod 14 tends to return to its original position under the action of the spring force, thereby applying a thrust to the radioactive particle 12, so that the radioactive particle 12 is clamped between the particle push rod 14 and the limit block 15. More specifically, the spring is sleeved outside the particle push rod 14, and the spring is located inside the clip 11. One end of the spring is connected to the inner wall of the end of the clip 11 away from the limit block 15, and the other end of the spring is connected to the particle push rod 14.

[0022] Specifically, a clip opening 5 is provided on one side of the tube base 2, and one end of the clip 11 provided with a limit block 15 is inserted into the tube base 2 through the clip opening 5. When the radioactive particles 12 in the clip 11 are used up, the clip 11 can be removed from the tube base 2 and a new batch of radioactive particles 12 can be loaded.

[0023] Specifically, the top end of the push rod 9 is located outside the tube seat 2 , and a hand-held portion 10 is provided on the top of the push rod 9 . The hand-held portion 10 is provided to facilitate the user to hold the push rod 9 .

[0024] Specifically, a handle 3 is provided on one side of the tube holder 2, and the user can hold the tube holder 2 by holding the handle 3, thereby making it easier to take or move the injection device. During the operation, the user can also more easily adjust the insertion depth and direction of the injection device, so as to achieve the purpose of placing the radioactive particles 12 at the planned position and fixing it during the operation. Specifically, the bone cement injection port includes an injection connector 4 and an injection channel 7. The injection channel 7 is located within the injection connector 4, and one end of the injection channel 7 is connected to the bone cement channel 17. More specifically, the injection connector 4 and the injection channel 7 are arranged at an angle, with the lower end of the injection channel 7 connected to the bone cement channel 17. The inclined arrangement of the injection connector 4 and the injection channel 7 facilitates the movement of bone cement, allowing bone cement to better enter the bone cement channel 17 and prevent it from remaining in the injection channel 7 and causing blockages.

[0025] The injection connector 4 can be a locking Luer connector connected to a bone cement high-pressure injection device.

[0026] Specifically, the injection tube 1 includes a bone cement injection tube 012 and a particle implantation tube 011 arranged in parallel. The particle implantation tube 011 is disposed on one side of the bone cement injection tube 012, and the radiation particle channel 18 and bone cement channel 17 are located within the particle implantation tube 011 and the bone cement injection tube 012, respectively. More specifically, one side of the bone cement injection tube 012 is recessed, and the particle implantation tube 011 is located within the recess of the bone cement injection tube 012. Together, the bone cement injection tube 012 and the particle implantation tube 011 form a substantially tubular injection tube 1, which facilitates insertion into the circular working channel during surgery.

[0027] During use, a working channel is established according to conventional vertebroplasty procedures. The vertebral tumor is cleared as needed, bone cement is prepared, and radioactive particles 12 are prepared. The tube holder 2 is connected to the bone cement injection device 8, which is equipped with a magazine 11 containing radioactive particles 12. Under fluoroscopy, the radioactive particles 12 and the bone cement injection device are delivered along the working channel into the vertebral body. When the bone cement enters the toothpaste phase, bone cement injection begins. As planned, the injection process utilizes a rotating, withdrawing, and implanting method. When radioactive particles 12 are needed, the push rod 9 is used to push them into the vertebral body.

[0028] Conventional radioactive seeds 12 are supplied in a spring-loaded magazine 11. After a single seed is injected, a seed ejector 14 automatically pushes the next seed 12 into the ready position for implantation. The ready position is the position of the radioactive seed 12 when it aligns with the injection channel 13.

[0029] During the injection, real-time monitoring should be performed under fluoroscopy to prevent bone cement leakage and to select the timing for injecting the radioactive particles 12 by observing the distribution of bone cement.

[0030] While embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A radioactive particle and bone cement injection device, characterized in that: The invention comprises a tube seat (2) and a push tube (1) fixed to the bottom of the tube seat (2); the tube seat (2) is provided with a radiation particle filling mechanism and a bone cement injection port, respectively; the push tube (1) comprises a radiation particle channel (18) and a bone cement channel (17) respectively connected to the radiation particle filling mechanism and the bone cement injection port.

2. The radioactive particle and bone cement injection device according to claim 1, characterized in that: The radioactive particle loading mechanism includes a clip (11) and a particle push rod (14), wherein a placement groove (16) for placing radioactive particles (12) is provided in the clip (11), a limit block (15) is provided at one end of the clip (11), and the other end of the clip (11) is elastically connected to the particle push rod (14) via an elastic member, and an injection channel (13) is provided on the clip (11) and is connected to the placement groove (16) and the radioactive particle channel (18), wherein the radial dimension of the injection channel (13) is not less than the radial dimension of the radioactive particles (12); When a radioactive particle (12) is placed in the placement groove (16), the radioactive particle (12) is located between the particle push rod (14) and the limit block (15). The particle push rod (14) applies a thrust to the radioactive particle (12) under the elastic force of the elastic member. The radioactive particle (12) is clamped between the particle push rod (14) and the limit block (15). The injection channel (13) corresponds to the position of one of the radioactive particles (12).

3. The radioactive particle and bone cement injection device according to claim 2, characterized in that: There are two injection channels (13), and the two injection channels (13) are symmetrically distributed on both sides of the magazine (11); A push rod opening (6) is provided at the top of the tube seat (2), and a push rod (9) is slidably connected in the push rod opening (6). The radial dimension of the push rod (9) is not greater than the radial dimension of the injection channel (13). The two injection channels (13) are respectively connected to the radiation particle channel (18) and the push rod opening (6). The length of the push rod (9) is not less than the distance from the top surface of the push rod opening (6) to the bottom surface of the injection tube (1). The two injection channels (13), the push rod (9) and the radiation particle channel (18) are coaxial.

4. The radioactive particle and bone cement injection device according to claim 3, characterized in that: A clip opening (5) is provided on one side of the tube seat (2), and one end of the clip (11) provided with a limit block (15) is inserted into the tube seat (2) through the clip opening (5).

5. The radioactive particle and bone cement injection device according to claim 3, characterized in that: The top end of the push rod (9) is located outside the tube seat (2), and a hand-held portion (10) is provided on the top of the push rod (9).

6. The radioactive particle and bone cement injection device according to claim 1, characterized in that: A holding handle (3) is provided on one side of the tube seat (2).

7. The radioactive particle and bone cement injection device according to claim 1, characterized in that: The bone cement injection port comprises an injection joint (4) and an injection channel (7), wherein the injection channel (7) is located inside the injection joint (4), and one end of the injection channel (7) is connected to the bone cement channel (17).

8. The radioactive particle and bone cement injection device according to claim 1, characterized in that: The injection tube (1) comprises a bone cement injection tube (012) and a particle implantation tube (011) arranged in parallel, the particle implantation tube (011) being arranged on one side of the bone cement injection tube (012), and the radiation particle channel (18) and the bone cement channel (17) being located in the particle implantation tube (011) and the bone cement injection tube (012), respectively.

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