Removable radioactive 125I particle strip

Abstract

The utility model relates to the technical field of medical treatment, and discloses a detachable radioactive 125I particle strip which comprises an implantation tube, the implantation tube is of a cavity structure with one closed end, particles are packaged in the implantation tube, the other end of the implantation tube is open, and a tube sealing piece used for sealing the open end of the implantation tube is installed at the open end of the implantation tube. A pushing device is detachably and fixedly connected to the end, away from the implanting pipe, of the pipe sealing piece and comprises a connecting piece, the connecting piece is detachably and fixedly connected with the pipe sealing piece, a horizontally-arranged push rod is fixedly connected to the end, away from the pipe sealing piece, of the connecting piece, and the center circumference of the push rod in the length direction is parallel to the central axis of the extending direction of the implanting pipe; and a guide device is also arranged at the front end of the implantation tube. The push rod is arranged on the particle strip, so that medical staff can accurately grasp the position of the particle strip in the process of implanting the particle strip, and the implantation accuracy of the particle strip is improved; the pipe sealing piece is detachably and fixedly connected with the connecting piece, so that the push rod is released.

Description

Technical Field

[0001] This utility model relates to the field of medical consumables technology, and in particular to a removable strip of radioactive 125I particles. Background Technology

[0002] In clinical treatment, malignant tumors can invade or compress the bile ducts, esophagus, ureters, and blood vessels, causing obstruction. This obstruction leads to functional disorders in the affected cavities, such as obstructive jaundice of the bile ducts, obstructive dysphagia of the esophagus, urinary obstruction of the ureters, and impaired blood circulation due to vascular obstruction. Stents are primarily used clinically to treat these obstructions, but they only physically resolve the obstruction and cannot inhibit tumor growth. It is well known that radioactive 125I particles can significantly inhibit tumor growth. Radioactive 125I particle strips are formed by inserting radioactive particles one by one into a medical plastic tube. The combination of radioactive 125I particle strips and stents for the treatment of malignant cavitary obstructions has already been used clinically. However, the current radioactive 125I particle strips are all made by clinicians. They need to be inserted into the patient's body with the use of a dilator, the dilator core is removed, the radioactive 125I particle strip is placed into the sheath, and the self-made particle strip is pushed to the obstruction area. It is difficult to accurately control the position of the particle strip during delivery, which increases the deviation between the treatment plan and the actual implantation. At the same time, the use of a 7F sheath to push and place the strip will increase the area of ​​trauma to the patient. Utility Model Content

[0003] This invention provides a detachable strip of radioactive 125I particles to solve the above-mentioned problems.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a detachable radioactive 125I particle strip, including an implantation tube, which is a cavity structure closed at one end, containing a number of particles, and the other end of the implantation tube is open. A sealing component for sealing the open end of the implantation tube is installed at the open end of the implantation tube, and a pushing device is detachably and fixedly connected to the end of the sealing component away from the implantation tube. The pushing device includes a connector, which is detachably and fixedly connected to the sealing component. A horizontally arranged push rod is fixedly connected to the end of the connector away from the sealing component. The center circumferential direction of the push rod along the length direction is parallel to the central axis of the implantation tube in the extension direction.

[0005] The implantation tube is also equipped with a guide device at its tip.

[0006] Preferably, the sealing tube is a cavity structure with one end closed and the other end open. The open end of the sealing tube is located close to the connector, and the connector is detachably and fixedly connected to the open end of the sealing tube.

[0007] Preferably, the end of the connector is located inside the cavity of the sealing tube and the connector is threadedly connected to the open end of the sealing tube.

[0008] Preferably, the sealing fitting is detachably and fixedly connected to the end of the implantation tube.

[0009] Preferably, the sealing component is fixedly connected to the end of the implantation tube, the sealing component is located inside the implantation tube, and a filling hole for filling particles is opened on the outer wall of the implantation tube, the filling hole being located close to the sealing component.

[0010] Preferably, the inner diameter of the implantation tube is adapted to the particle, and a support strip is also encapsulated inside the implantation tube. One end of the support strip abuts against the particle near the sealing component, and the other end of the support strip abuts against the closed end of the sealing component.

[0011] Preferably, the guiding device includes a guide tube, which is fixedly connected to the end of the implantation tube away from the connector. A guide hole is provided at the end of the guide tube away from the implantation tube. An installation hole is provided on the outer side wall of the guide tube. A guide wire is inserted into the guide hole. One end of the guide wire passes through the guide hole and extends to the outside of the guide tube. The other end of the guide wire passes through the installation hole and extends to the outside of the guide tube.

[0012] The push rod is made of metal wire, and a hand-held part is fixedly connected to the end of the push rod away from the connector.

[0013] Preferably, a protrusion is fixedly connected to the outer wall of the implantation tube at the filling hole, and the protrusion is adapted to the filling hole.

[0014] The beneficial effects of this utility model are as follows: (1) By setting a push rod on the particle strip, medical personnel can accurately grasp the position of the particle strip during the implantation process, thereby improving the accuracy of particle strip implantation; (2) The detachable fixed connection between the sealing tube and the connecting tube makes it easy to separate the sealing tube and the connecting tube, thereby realizing the release of the push rod; (3) The setting of the guide device makes it easy to guide and pull the particle strip, further improving the accuracy of the particle strip delivery process and reducing the deviation between the treatment plan and the actual implantation; (4) By setting the support strip, it is easy to limit the position of the particle to improve the treatment accuracy of the particle strip. At the same time, the length of the implantation tube can be adapted to the situation of filling different numbers of particles, thus improving the applicability of the implantation tube. In addition, the setting of the support strip further ensures the stability of the particles to prevent the particles from reaching the outside of the implantation tube through the filling hole. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the connection relationship between the implantation tube and the delivery device of this utility model;

[0017] Figure 3 This is a schematic diagram showing the connection between the guide device and the implantation tube of this utility model.

[0018] Reference numerals: 1-Implantation tube, 2-Particle, 3-Sealing tube, 4-Connector, 5-Push rod, 6-Filling hole, 7-Support bar, 8-Guide tube, 9-Guide hole, 10-Mounting hole, 11-Guide wire, 12-Protrusion, 13-Handheld part. Detailed Implementation

[0019] The present invention will now be further described with reference to the accompanying drawings.

[0020] Example 1

[0021] A detachable radioactive 125I particle strip includes an implantation tube 1, which is a cavity structure closed at one end. The implantation tube 1 contains a plurality of particles 2. The other end of the implantation tube 1 is open, and a sealing element 3 is installed at the open end of the implantation tube 1 to seal it. The connection method between the sealing element 3 and the implantation tube 1 is not specifically limited here. The sealing element 3 can be threaded to the implantation tube 1, or fixedly connected to the implantation tube 1 after the particles 2 are filled, or subjected to an interference fit, etc. A pushing device is detachably and fixedly connected to the end of the sealing element 3 away from the implantation tube 1. The pushing device includes a connector 4, which is detachably and fixedly connected to the sealing element 3, such as by insertion, threaded connection, or interference fit. The connection method between the connector 4 and the sealing element 3 is not specifically limited here. A horizontally arranged push rod 5 is fixedly connected to the end of the connector 4 away from the sealing element 3. The push rod 5 is located outside the implantation tube 1, and its circumferential direction along its length is parallel to the central axis of the implantation tube 1 along its extension direction. The front end of the implantation tube 1 is also equipped with a guide device.

[0022] The lengths of the push rod 5 and the implantation tube 1 can be adjusted as needed to meet clinical requirements. In use, the particles 2 are inserted into the implantation tube 1, and the sealing element 3 is connected to the end of the implantation tube 1, ensuring both ends are sealed. The connecting element 4 is then connected to the sealing element 3. Next, under the traction of the guiding device, the push rod 5 is held and the particle strip is delivered to the lesion. Then, medical personnel implant the stent. Supported by the stent, the particle strip contacts the patient's cavity wall. At this point, the push rod 5 is released, separating the connecting element 4 from the sealing element 3, and the push rod 5 is removed from the patient's body, thus completing the particle strip implantation. By setting the push rod 5 on the particle strip, medical personnel can accurately grasp the position of the particle strip during implantation, improving the accuracy of the implantation. Simultaneously, the detachable and fixed connection between the sealing element 3 and the connecting element 4 facilitates separation, thereby releasing the push rod 5. The guide device facilitates the guidance and traction of the particle strips, further improving the accuracy of the particle strip delivery process and reducing the deviation between the treatment plan and the actual implantation.

[0023] In another embodiment, the sealing element 3 is a cavity structure with one end closed and the other end open. The closed end of the sealing element 3 is positioned near the particle strip inside the implantation tube 1, and the open end of the sealing element 3 is positioned near the connector 4. The connector 4 is detachably and fixedly connected to the open end of the sealing element 3. By closing one end of the sealing element 3, it is easy to achieve the closure of the implantation tube 1 by the sealing element 3, while the cavity structure at the other end of the sealing element 3 facilitates the connection between the sealing element 3 and the connector 4.

[0024] In another embodiment, the end of the connector 4 is located within the cavity of the sealing tube 3, and the connector 4 is threadedly connected to the open end of the sealing tube 3. Specifically, the inner wall of the open end of the connector 4 has an internal thread, and the outer wall of the sealing tube 3 has an external thread that matches the internal thread. The sealing tube 3 is threadedly connected to the connector 4 via the external thread. The connector 4 and the sealing tube 3 are detachably and securely connected via threads, facilitating separation between the connector 4 and the sealing tube 3 and providing convenient operation.

[0025] In another embodiment, the sealing element 3 is fixedly connected to the end of the implantation tube 1. The sealing element 3 is located inside the implantation tube 1, meaning that the end of the sealing element 3 does not extend outside the implantation tube 1, in order to reduce the sharp edges of the particle strips and thus reduce the possibility of the particle strips causing trauma to the patient's cavity wall. A loading hole 6 for loading particles 2 is provided on the outer wall of the implantation tube 1, and the loading hole 6 is located close to the sealing element 3. To ensure the stability of the connection between the sealing element 3 and the implantation tube 1 and to reduce the risk of the sealing element 3 falling off after implantation, the sealing element 3 is fixedly connected to the implantation tube 1. Since the sealing element 3 is a closed structure, a loading hole 6 is provided on the outer wall of the implantation tube 1 to facilitate the loading of particles 2 into the implantation tube 1 through the loading hole 6. The size of the loading hole 6 is adjusted according to the size of the particles 2 so that the particles 2 can enter the implantation tube 1 through the loading hole 6. The length of the particle strips can be designed to different sizes to meet different clinical needs, so that the particle strips located inside the implantation tube 1 are pressed against each other and cannot reach the outside of the implantation tube 1 through the loading hole 6.

[0026] In another embodiment, the inner diameter of the implantation tube 1 is adapted to the particle 2. A support strip 7 is also encapsulated within the implantation tube 1. One end of the support strip 7 abuts against the particle 2 closest to the sealing element 3, while the other end abuts against the closed end of the sealing element 3. The length of the support strip 7 can be cut according to the site conditions to achieve a better fit. The support strip 7 facilitates the limitation of the particle 2's position, improving the treatment accuracy of the particle strip. Furthermore, the implantation tube 1 can be configured with a single specification; in clinical practice, a support strip of appropriate length can be selected based on the number of particles 2, thus expanding the applicability of the implantation tube 1. In addition, the support strip 7 further ensures the stability of the particle 2, preventing it from reaching the outside of the implantation tube 1 through the filling hole 6.

[0027] In another embodiment, the guiding device includes a guide tube 8, which is fixedly connected to the end of the implantation tube 1 away from the connector 4. The outer diameter of the guide tube 8 is consistent with the outer diameter of the implantation tube 1 to reduce the sharp edges of the particle strip and reduce trauma to the patient. A guide hole 9 is provided at the end of the guide tube 8 away from the implantation tube 1, and an installation hole 10 is provided on the outer wall of the guide tube 8. A guide wire 11 is inserted into the guide hole 9. One end of the guide wire 11 passes through the guide hole 9 and extends to the outside of the guide tube 8 and reaches the lesion site of the patient. The other end of the guide wire 11 passes through the installation hole 10 and extends to the outside of the guide tube 8, reaching the patient's body. In clinical practice, after puncture with a puncture needle and delivery of the guide wire to the lesion site, and removal of the puncture needle, the end of the guide wire 11 outside the patient's body passes through the installation hole 10, and the particle strip is delivered to the lesion site under the guidance of the guide wire 11.

[0028] In another embodiment, the push rod 5 is a metal wire, and a handle 13 is fixedly connected to the end of the push rod 5 away from the connector 4. The material of the metal wire is not specifically limited here and can be selected according to actual needs.

[0029] In another embodiment, a protrusion 12 is fixedly connected to the outer wall of the implantation tube 1 at the filling hole 6, and the protrusion 12 is adapted to the filling hole 6. When the filling hole 6 is opened, a cutter or the like cuts the outer wall of the implantation tube 1 to form the filling hole 6, and the outer wall of the implantation tube 1 at the filling hole 6 is not separated from the implantation tube 1 after being cut by the cutter, but is in a state of protruding on the outer wall of the implantation tube 1. This part is referred to as the protrusion 12. The setting of the protrusion 12 can reduce the escape of particles 2 from the implantation tube 1 to a certain extent.

[0030] In another embodiment, the implantation tube 1, guide tube 8, and connector 4 are all rounded, and the protrusion 12 is edge-ground and rounded.

[0031] Example 2

[0032] The difference from Embodiment 1 is that the sealing component 3 is detachably and fixedly connected to the end of the implantation tube 1, eliminating the need to open a filling hole 6 on the outer wall of the implantation tube 1. Specifically, the sealing component 3 can be threadedly connected to the implantation tube 1. After placing the particles 2 and the support wire inside the implantation tube 1, the sealing component 3 is installed at the end of the implantation tube 1, and the connector 4 is installed in place. The rest of the structure is the same as in Embodiment 1.

[0033] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A releasable radioactive 125I seed strand comprising an implant tube, characterized in that: The implant tube is a cavity structure with one end closed, a plurality of particles are packaged in the implant tube, the other end of the implant tube is open, and a pipe sealing piece for closing the open end of the implant tube is installed at the open end of the implant tube, and the end of the pipe sealing piece away from the implant tube is detachably and fixedly connected with a pushing device, the pushing device comprises a connecting piece, the connecting piece is detachably and fixedly connected with the pipe sealing piece, and the end of the connecting piece away from the pipe sealing piece is fixedly connected with a horizontally arranged push rod, the center axis of the push rod along the length direction is parallel to the center axis of the implant tube in the extension direction. The front end of the implant tube is also provided with a guide device.

2. A releasable 125I seed strand according to claim 1, wherein: The pipe sealing piece is a cavity structure with one end closed, the other end of the pipe sealing piece is open, and the open end of the pipe sealing piece is arranged close to the connecting piece, and the open end of the pipe sealing piece is detachably and fixedly connected with the connecting piece.

3. A releasable 125I seed strand according to claim 2, wherein: The end of the connecting piece is located in the cavity of the pipe sealing piece, and the connecting piece is threadedly connected with the open end of the pipe sealing piece.

4. A releasable 125I seed strand according to claim 3, wherein: The pipe sealing piece is detachably and fixedly connected at the end of the implant tube.

5. A releasable 125I seed strand according to claim 3, wherein: The pipe sealing piece is fixedly connected at the end of the implant tube, and the pipe sealing piece is located in the implant tube, and a filling hole for filling particles is formed on the outer side wall of the implant tube, and the filling hole is arranged close to the pipe sealing piece.

6. A releasable 125I seed strand according to any one of claims 1-5, characterized in that: The inner diameter of the implant tube is matched with the particles, and a support strip is also packaged in the implant tube, one end of the support strip abuts against the particles close to the pipe sealing piece, and the other end of the support strip abuts against the closed end of the pipe sealing piece.

7. A releasable 125I seed strand according to claim 6, wherein: The guide device comprises a guide tube, the guide tube is fixedly connected at the end of the implant tube away from the connecting piece, a guide hole is formed at the end of the guide tube away from the implant tube, a mounting hole is formed on the outer side wall of the guide tube, a guide wire is arranged in the guide hole, one end of the guide wire extends to the outside of the guide tube through the guide hole, and the other end of the guide wire extends to the outside of the guide tube through the mounting hole. The push rod is a metal wire, and a hand holding part is fixedly connected at the end of the push rod away from the connecting piece.

8. A releasable 125I seed strand according to claim 5, wherein: The outer side wall of the implant tube at the filling hole is fixedly connected with a protruding part, and the protruding part is matched with the filling hole. The outer side wall of the implant tube at the filling hole is fixedly connected with a protruding part, and the protruding part is matched with the filling hole.

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