Endoscopic radioactive seed implantation device for gastrointestinal tumor

Abstract

The utility model relates to a kind of gastrointestinal tumor endoscopic radioactive particle implantation device, its structure includes operating part, first striker, second striker, catheter, particle bin, particle loading part and puncture needle;The catheter one end is connected with operating part, and the other end is detachably connected with particle loading part, and the puncture needle is located the end of the particle loading part;First channel and second channel are equipped in the catheter, first striker and second striker pass through operating part respectively, and the first striker is inserted into the first channel, and the second striker is inserted into the second channel, particle bin mounting channel for installing particle bin is equipped in the end of the first channel, and the particle loading part is used to transport the particle exported from particle bin to the position corresponding with puncture needle.The utility model solves the problem of repeatedly loading particles in the prior art, simplifies the operation process, and reduces the operation time.

Description

Technical Field

[0001] This utility model relates to a radioactive particle implantation device, specifically a radioactive particle implantation device for gastrointestinal tumors under endoscopy. Background Technology

[0002] Clinically, particle implantation therapy has achieved significant therapeutic effects in treating advanced gastrointestinal tumors. Currently, there are various methods, including intraoperative implantation, image-guided implantation, and endoscopic implantation. Particle implantation is guided by endoscopy or endoscopic ultrasound to inhibit tumor growth. Endoscopic implantation of particles into the tumor is accurate, reliable, and has few complications. It allows direct visualization of the tumor, avoiding damage to surrounding blood vessels and nerves. The precise placement of particles minimizes patient trauma, making it a safe, effective, and relatively economical method.

[0003] For example, Chinese patent CN102671290A discloses an endoscopic radioactive particle implantation puncture needle for gastrointestinal tumors, including a puncture section, a connecting section, an operating section, and an implantation section. The puncture section includes a puncture needle sheath and a particle implantation channel. The connecting section includes a distal metal outer shell tube fixed to the puncture needle at one end, which is fixed to a proximal metal outer shell tube via a flexible spiral metal outer shell tube in the middle; the other end of the proximal metal outer shell tube is fixed to the operating section. The operating section includes an operating cap, a particle implantation chamber, and a particle implantation channel inlet. The implantation section includes a push rod and an operating handle fixed together. This provides an endoscopic radioactive particle implantation device for local radiotherapy of advanced gastrointestinal cancers, which is simple to operate and has good safety.

[0004] However, the existing endoscopic radioactive particle implanters for gastrointestinal tumors have the following problems: they are mainly designed for the implantation of chemotherapy drug particles, can only load one particle, and need to be removed and reloaded after each particle is implanted, which is a cumbersome operation. Utility Model Content

[0005] The purpose of this invention is to provide a device for endoscopic radioactive particle implantation of gastrointestinal tumors, so as to solve the problem that existing endoscopic radioactive particle implanters for gastrointestinal tumors need to be removed and reloaded after each implantation of a particle.

[0006] This invention is implemented as follows: An endoscopic radioactive particle implantation device for gastrointestinal tumors includes an operating part, a first striking pin, a second striking pin, a catheter, a particle chamber, a particle loading part, and a puncture needle; one end of the catheter is connected to the operating part, and the other end is detachably connected to the particle loading part; the puncture needle is located at the end of the particle loading part; a first channel and a second channel are provided in the catheter; the first striking pin and the second striking pin respectively pass through the operating part, with the first striking pin extending into the first channel and the second striking pin extending into the second channel; a particle chamber installation channel for installing the particle chamber is provided at the end of the first channel; the particle loading part is used to transport particles output from the particle chamber to a position corresponding to the puncture needle.

[0007] As a further improvement of this utility model, the particle loading part includes a displacement chamber, the cross-section of which is an elongated hole, and a spring sheet is provided on one side of the displacement chamber corresponding to the first channel.

[0008] As a further improvement of this utility model, the spring includes a first inclined section, a straight section and a second inclined section. The first inclined section, the straight section and the second inclined section are connected end to end to form a trapezoidal structure. The end of the first inclined section is close to the end of the guide tube and fixed on the inner wall of the displacement chamber. The end of the second inclined section is a free end.

[0009] As a further improvement of this utility model, the particle chamber is a cylindrical structure, the inner diameter of the particle chamber is the same as the inner diameter of the first channel, and the outer diameter of the particle chamber is the same as the inner diameter of the particle chamber installation channel.

[0010] As a further improvement of this utility model, the operating part includes a housing, a fixing part is provided inside the housing, a spring is provided inside the housing, the spring is sleeved on the second firing pin, the outer end of the second firing pin is an integral or separate second handle, a fixing block is provided on one side of the second handle, the fixing block is used to cooperate with the fixing part to restrict the return of the spring.

[0011] As a further improvement of this utility model, the outer end of the first firing pin is a first handle, and a scale is provided on the first handle.

[0012] As a further improvement of this utility model, the insertion end of the puncture needle has a beveled structure, and the angle between the beveled surface and the axis of the puncture needle is 15 degrees.

[0013] As a further improvement of this utility model, the conduit is a flexible tube.

[0014] As a further improvement of this utility model, the conduit and the particle loading part are connected by a thread.

[0015] This invention installs a particle chamber inside a catheter, which can store multiple radioactive particles. During particle implantation surgery, a first impinging pin ejects the radioactive particles from the particle chamber. The ejected radioactive particles are then displaced through a particle loading section to be coaxial with the second channel and the puncture needle. A second impinging pin then pushes the radioactive particles into the puncture needle and implants them into a predetermined position in the patient's body. When the next radioactive particle needs to be implanted, the first impinging pin is used to eject another radioactive particle, and the second impinging pin is used for implantation. This solves the problem of repeated particle loading in the prior art, simplifies the operation process, and reduces surgical time. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the present invention.

[0017] Figure 2 This is a structural diagram of the second firing pin of this utility model extending into the puncture needle.

[0018] Figure 3 This is a schematic diagram of radioactive particles entering the particle loading section of this utility model.

[0019] Figure 4 This is a schematic diagram of the radioactive particles entering the particle loading section of this utility model.

[0020] Figure 5 yes Figure 1 AA view.

[0021] Figure 6 yes Figure 1 BB view.

[0022] In the diagram: 1. Operating unit; 2. First firing pin; 3. Second firing pin; 4. Conduit; 5. Particle chamber; 6. Particle loading unit; 7. Puncture needle; 8. First handle; 9. Second handle; 10. Spring; 11. Fixing block; 12. Radioactive particle; 1-1. Shell; 1-2. Fixing unit; 4-1. First channel; 4-2. Second channel; 4-3. Particle chamber installation channel; 6-1. Displacement chamber; 6-2. Spring. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] See Figures 1 to 6 This utility model is a device for endoscopic radioactive particle implantation of gastrointestinal tumors. Its structure specifically includes an operating part 1, a first striking pin 2, a second striking pin 3, a catheter 4, a particle chamber 5, a particle loading part 6, and a puncture needle 7.

[0026] The operating part 1, catheter 4, particle loading part 6, and puncture needle 7 are connected sequentially. The catheter 4 and operating part 1 are generally fixedly connected, while the catheter 4 and particle loading part 6 are detachably connected. The particle loading part 6 and puncture needle 7 are fixedly connected. The particle loading part 6 and puncture needle 7 are an integral structure. In one embodiment of this invention, the particle loading part 6 and the end of the catheter 4 are connected by a thread. Alternatively, the particle loading part 6 and the end of the catheter 4 can be detachably connected in other ways, ensuring the fixed and accurate relative position of the particle loading part 6 and the catheter 4 after connection.

[0027] A first channel 4-1 and a second channel 4-2 are formed inside the catheter 4. Both the first channel 4-1 and the second channel 4-2 are circular channels. The axes of the first channel 4-1, the second channel 4-2, and the catheter 4 are aligned. A particle chamber installation channel 4-3 is provided on the first channel 4-1 near the puncture needle 7. The first channel 4-1 and the particle chamber installation channel 4-3 are connected end to end and pass through the catheter 4. The second channel 4-2 also passes through the catheter 4. Generally, the first channel 4-1 and the second channel 4-2 have the same diameter.

[0028] The axis of the particle chamber installation channel 4-3 coincides with the axis of the first channel 4-1, and the diameter of the particle chamber installation channel 4-3 is larger than the diameter of the first channel 4-1. The particle chamber 5 is installed inside the particle chamber installation channel 4-3. The particle chamber 5 is cylindrical and has a certain length. Multiple radioactive particles 12 can be placed sequentially along its axis inside. The outer diameter of the particle chamber 5 is the same as the inner diameter of the particle chamber installation channel 4-3, so that the particle chamber 5 can be placed just inside the particle chamber installation channel 4-3. The inner diameter of the particle chamber 5 is the same as the inner diameter of the first channel 4-1. After the particle chamber 5 is installed in the particle chamber installation channel 4-3, the inner wall of the particle chamber 5 is smoothly connected to the inner wall of the first channel 4-1.

[0029] The particle chamber installation channel 4-3 is located on the first channel 4-1 near the end of the puncture needle 7. After the particle loading part 6 is removed from the end of the conduit 4, the particle chamber installation channel 4-3 is exposed. The particle chamber 5 can be inserted into the particle chamber installation channel 4-3 from the end of the conduit 4. The length of the particle chamber 5 is the same as the length of the particle chamber installation channel 4-3. After the particle loading part 6 is installed at the end of the conduit 4, the particle chamber 5 is fixed in the particle chamber installation channel 4-3.

[0030] The particle chamber 5 also includes protective caps at both ends. Before installing the particle chamber 5 into the particle chamber installation channel 4-3, remove the protective caps at both ends of the particle chamber 5.

[0031] A first striking pin 2 and a second striking pin 3 are connected to the operating part 1. The first striking pin 2 extends into the first channel 4-1, and the second striking pin 3 extends into the second channel 4-2. Both the first striking pin 2 and the second striking pin 3 are cylindrical structures. The diameter of the first striking pin 2 is slightly smaller than the diameter of the first channel 4-1, and the first striking pin 2 can move smoothly within the first channel 4-1. The diameter of the second striking pin 3 is slightly smaller than the diameter of the second channel 4-2, and the second striking pin 3 can move smoothly within the second channel 4-2.

[0032] The operating unit 1 includes a housing 1-1, which is easy for the operator to grip. A first firing pin 2 passes through the housing 1-1, and the outer end of the first firing pin 2 is a first handle 8, which extends outside the housing 1-1. The outer end of the second firing pin 3 is a second handle 9, which is rotatably and slidably connected to the housing 1-1. The second handle 9 and the second firing pin 3 can be an integral structure or a separate structure. A spring 10 is provided inside the housing 1-1, and the spring 10 is sleeved on the second firing pin 3. One end of the spring 10 is connected to the second firing pin 3, and the other end is connected to the inner wall of the housing 1-1. When the spring 10 is in a free state, the second firing pin 3 does not extend from the end of the second channel 4-2 into the particle loading part 6 and the puncture needle 7. However, when the second handle 9 is used to push the second firing pin 3 and compress the spring 10, the end of the second firing pin 3 extends from the end of the second channel 4-2 into the particle loading part 6 and the puncture needle 7.

[0033] A long strip-shaped fixing part 1-2 is fixedly installed inside the housing 1-1. A fixing block 11 of a certain length is provided on one side of the second handle 9. The fixing block 11 is located at the front end of the second handle 9. When the fixing block 11 moves with the second handle 9 to the front end of the fixing part 1-2, the spring 10 is compressed. At this time, the second striking pin 3 extends beyond the tip of the puncture needle 7. Rotating the second handle 9 causes the fixing block 11 to rotate to the front of the fixing part 1-2. After releasing the second handle 9, the fixing part 1-2 limits the fixing block 11 and the second handle 9, thereby preventing the spring 10 and the second striking pin 3 from returning to their original positions. The second striking pin 3 extending beyond the tip of the puncture needle 7 can prevent the tip of the puncture needle 7 from damaging the endoscope or the endoscope from damaging the tip of the puncture needle 7 when the device passes through the endoscope. After rotating the second handle 9 to disengage the fixing block 11 from the fixing part 1-2, the second firing pin 3 and the second handle 9 move backward and reset under the action of the spring 10. At this time, the second firing pin 3 retracts from the puncture needle 7 into the second channel 4-2.

[0034] The state in which the fixing part 1-2 limits the fixing block 11 corresponds to the "closed" state, while the state in which the fixing block 11 is disengaged from the fixing part 1-2 corresponds to the "open" state.

[0035] The particle loading unit 6 includes a displacement chamber 6-1. The displacement chamber 6-1 has an elongated oval hole in cross-section. The diameter of the semicircle on one side of the elongated oval hole is the same as the diameter of the first channel 4-1, and its center coincides with the axis of the first channel 4-1. The diameter of the semicircle on the other side of the elongated oval hole is the same as the diameter of the second channel 4-2, and its center coincides with the axis of the second channel 4-2. A spring piece 6-2 is provided inside the displacement chamber 6-1 on the side corresponding to the first channel 4-1.

[0036] The first striking pin 2 pushes the particles in the particle chamber 5 forward. The pushed particles enter one side of the displacement chamber 6-1. When a particle of a certain length leaves the particle chamber 5, it is pushed to the other side of the displacement chamber 6-1 by the spring piece 6-2, so that the particle corresponds to the second channel 4-2 and the puncture needle 7. In this way, the second striking pin 3 can be used to push the particle into the puncture needle 7 and implant it into the patient's body through the puncture needle 7.

[0037] The spring 6-2 comprises a first inclined section, a straight section, and a second inclined section, which are connected end-to-end to form a trapezoidal structure. The end of the first inclined section is close to the end of the guide tube 4 and fixed to the inner wall of the displacement chamber 6-1, while the end of the second inclined section is a free end. When the first firing pin 2 pushes the particle into the displacement chamber 6-1, the end of the particle first contacts the first inclined section. The particle presses against the spring 6-2, causing it to deform. Gradually, the spring 6-2 flattens out on the inner wall of the displacement chamber 6-1, and the length of the displacement chamber 6-1 is greater than or equal to the length of the flattened spring 6-2. When the particle exits from the particle chamber 5, the restoring force of the spring 6-2 pushes the particle to move, thereby realizing the change of the particle's position.

[0038] The conduit 4 is a flexible tube, and the connecting parts at both ends of the conduit 4 can be rigid tubes. The flexible tube part is between the two rigid tubes of the conduit 4 and can be bent.

[0039] In one embodiment of this utility model, in order to facilitate the operator to know the number of remaining particles in the particle chamber 5, multiple scale marks are engraved on the first handle 8. As the first firing pin 2 gradually penetrates into the particle chamber 5, the particles in the particle chamber 5 are pushed out in sequence. The overlap state of each scale mark with the end of the shell 1-1 corresponds to different numbers of remaining particles in the particle chamber 5.

[0040] In one embodiment of this utility model, to prevent the first firing pin 2 from accidentally pushing the particles in the particle chamber 5, a fixing device is provided to fix the first handle 8. The fixing device can be a limiting member set on the first handle 8. The limiting member is a transparent or opaque flexible collar, which is sleeved on the first handle 8. The friction between the flexible collar and the first handle 8 prevents the first handle 8 from moving forward. The limiting member can also be a clip or other structure, as long as it can fix the first handle 8.

[0041] In one embodiment of this utility model, the catheter 4, particle chamber 5, and protective caps at both ends of the particle chamber 5 of the radioactive particle implantation device are all made of lead-based radiation-proof material, which can reduce radiation damage to the surgeon.

[0042] The insertion end of the puncture needle 7 has a beveled structure. In one embodiment of this utility model, the angle between the bevel and the axis of the puncture needle 7 is 15 degrees.

[0043] The method of using this utility model is as follows:

[0044] 1. Perform a CT scan on the patient before the operation and design a particle implantation plan.

[0045] 2. After the patient is under general anesthesia, the tumor is located by endoscopy. The foremost scale on the first handle 8 is aligned with the rear end of the operating part 1 and the first handle 8 is fixed. The protective caps at both ends of the particle chamber 5 are removed and inserted into the particle chamber installation channel 4-3. Then the front end of the catheter 4 and the rear end of the particle loading part 6 are connected through the threaded joint.

[0046] 3. Press the second handle 9 forward and rotate it to the "off" position. The second striking pin 3 extends beyond the tip of the puncture needle 7. Then insert the device into the endoscope and deliver the puncture needle 7 to the surface of the tumor.

[0047] 4. After the puncture needle 7 exits the endoscope, rotate the second handle 9 to the "open" position and release it. Under the action of the spring 10, the second impact needle 3 retracts into the catheter 4. According to the preoperative plan, puncture the puncture needle 7 to the designated position, push the first handle 8 to push a radioactive particle 12 into the particle loading section 6. The radioactive particle 12 is ejected into the rear end of the puncture needle 7 by the shrapnel 6-2. Press the second handle 9 to implant the radioactive particle 12 forward into the tumor. The implantation of one radioactive particle 12 is completed.

[0048] 5. Release the second handle 9. Under the action of the spring 10, the second handle 9 and the second firing pin 3 will retract and reset. Then, insert the puncture needle 7 into the designated position and repeat step 4 to implant the second radioactive particle 12. Repeat the operation to complete the implantation of multiple radioactive particles 12.

[0049] 6. After all the radioactive particles 12 in the particle chamber 5 have been used up, push the second handle 9 and rotate it to the "off" position to remove the device, reopen the particle loading section 6, load a new particle chamber 5, and repeat the above operation until the surgery is completed.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An endoscopic radioactive particle implantation device for gastrointestinal tumors, characterized in that, The device includes an operating unit, a first firing pin, a second firing pin, a conduit, a particle chamber, a particle loading unit, and a puncture needle. One end of the conduit is connected to the operating unit, and the other end is detachably connected to the particle loading unit. The puncture needle is located at the end of the particle loading unit. A first channel and a second channel are provided inside the conduit. The first firing pin and the second firing pin pass through the operating unit, with the first firing pin extending into the first channel and the second firing pin extending into the second channel. A particle chamber mounting channel for mounting the particle chamber is provided at the end of the first channel. The particle loading unit is used to transport particles output from the particle chamber to a position corresponding to the puncture needle.

2. The endoscopic radioactive particle implantation device for gastrointestinal tumors according to claim 1, characterized in that, The particle loading unit includes a displacement chamber with an elongated circular cross-section. A spring sheet is provided inside the displacement chamber on one side corresponding to the first channel.

3. The endoscopic radioactive particle implantation device for gastrointestinal tumors according to claim 2, characterized in that, The spring includes a first inclined section, a straight section, and a second inclined section. The first inclined section, the straight section, and the second inclined section are connected end to end to form a trapezoidal structure. The end of the first inclined section is close to the end of the guide tube and is fixed on the inner wall of the displacement chamber. The end of the second inclined section is a free end.

4. The endoscopic radioactive particle implantation device for gastrointestinal tumors according to claim 1, characterized in that, The particle chamber is a cylindrical structure, with its inner diameter matching the inner diameter of the first channel and its outer diameter matching the inner diameter of the particle chamber mounting channel.

5. The endoscopic radioactive particle implantation device for gastrointestinal tumors according to claim 1, characterized in that, The operating part includes a housing, a fixing part is provided inside the housing, and a spring is provided inside the housing. The spring is sleeved on the second firing pin. The outer end of the second firing pin is a second handle that is integral or separate. A fixing block is provided on one side of the second handle. The fixing block is used to cooperate with the fixing part to limit the return of the spring.

6. The endoscopic radioactive particle implantation device for gastrointestinal tumors according to claim 1, characterized in that, The outer end of the first firing pin is a first handle, and a scale is provided on the first handle.

7. The endoscopic radioactive particle implantation device for gastrointestinal tumors according to claim 1, characterized in that, The insertion end of the puncture needle has a beveled structure, and the angle between the bevel and the axis of the puncture needle is 15 degrees.

8. The endoscopic radioactive particle implantation device for gastrointestinal tumors according to claim 1, characterized in that, The catheter is a flexible tube.

9. The endoscopic radioactive particle implantation device for gastrointestinal tumors according to claim 1, characterized in that, The conduit and the particle loading section are connected by threads.

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