Introducer

Abstract

The embodiment of the present application provides a stent delivery device for use with a medical endoscope, and relates to the field of medical equipment, and the stent delivery device comprises a non-stent accommodating part and a stent accommodating part, the non-stent accommodating part is detachably connected with the stent accommodating part, and the non-stent accommodating part and the stent accommodating part cooperate to release a stent located in the stent accommodating part; the non-stent accommodating part can pass through a channel of the endoscope, and the outer diameter of the stent accommodating part is greater than that of the non-stent accommodating part. The stent accommodating part at the distal end can accurately and safely release the stent under the direct vision of the endoscope. When the stent in the stent delivery device needs to be replaced, the stent accommodating part and the non-stent accommodating part are detached, and then the stent accommodating part can be directly replaced, so that the replacement operation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, and in particular, to an implantation device. BACKGROUND

[0002] Clinical medical research shows that esophageal obstruction is mainly caused by esophageal malignant lesions, which can cause pain in the esophagus when the patient eats, difficulty swallowing, and affect the smoothness of food and water, and also affect the patient's nutrient intake. If the patient cannot eat for a long time to obtain nutrition, it will pose a serious threat to the patient's life safety. Therefore, how to take effective measures to ensure the nutrient intake of patients with esophageal obstruction is the focus of current clinical medical research. In the past clinical treatment, drug treatment is often used, but the treatment effect is not ideal. According to the current clinical data investigation, the most effective treatment method for esophageal obstruction is stent interventional therapy.

[0003] The stent is released to the lesion site by the implantation device.

[0004] In the research, it is found that the existing implantation device has the following shortcomings:

[0005] The existing OTW implantation device can release a large stent, but cannot release the stent under the direct vision of an endoscope. The existing TTS implantation device can release a stent under the direct vision of an endoscope, but can only release a small stent. Therefore, the existing implantation device has the defect that a large stent cannot be released under the direct vision of an endoscope. SUMMARY

[0006] The purpose of the present application includes, for example, providing an implantation device that can accurately release a stent under the direct vision of an endoscope while releasing a large stent.

[0007] Embodiments of the present application can be implemented as follows:

[0008] The present embodiment provides an implantation device for use with a medical endoscope, comprising:

[0009] a non-stent accommodating portion and a stent accommodating portion, the non-stent accommodating portion and the stent accommodating portion being detachably connected, the non-stent accommodating portion and the stent accommodating portion cooperating to release a stent located in the stent accommodating portion; the non-stent accommodating portion being capable of passing through a channel of the endoscope; the outer diameter of the stent accommodating portion being greater than the outer diameter of the non-stent accommodating portion.

[0010] In an optional embodiment, the outer diameter of the stent accommodating portion is greater than the inner diameter of the channel.

[0011] In an optional embodiment, the stent accommodating portion comprises a first outer tube for accommodating the stent, and the non-stent accommodating portion comprises a second outer tube, the first outer tube and the second outer tube being detachably connected.

[0012] In an optional implementation, the first outer tube and the second outer tube are screwed together or snap-fitted together.

[0013] In an alternative embodiment, the first outer tube and the second outer tube are detachably connected by a connecting assembly.

[0014] In an optional embodiment, the connecting assembly includes a first connector and a second connector, the first connector being connected to a first outer tube and the second connector being connected to a second outer tube; the first connector and the second connector are detachably connected.

[0015] In an optional implementation, the first connector and the second connector are screwed together or snap-fitted together.

[0016] In an alternative embodiment, the first connector is inserted into the proximal end of the first outer tube.

[0017] In an optional embodiment, a portion of the second connector is inserted into the distal end of the second outer tube, and the remaining portion of the second connector protrudes from the distal end of the second outer tube. The portion of the second connector protruding from the second outer tube is inserted into the first connector and detachably connected to the first connector.

[0018] In an optional implementation, the inner diameter of the first outer tube is larger than the inner diameter of the second outer tube.

[0019] In an optional embodiment, the support receiving portion further includes a first inner tube, and the non-support receiving portion includes a second inner tube, the first inner tube and the second inner tube being detachably connected.

[0020] In an optional implementation, the first inner tube and the second inner tube are screwed together or snap-fitted together.

[0021] In an optional embodiment, the first inner tube and the second inner tube are detachably connected via a third connector.

[0022] In an optional implementation, the third connector is connected to the second inner tube, and the first inner tube is detachably connected to the third connector.

[0023] In an optional implementation, the third connector is screwed or snapped into the first inner tube.

[0024] In an optional embodiment, the stent housing further includes a release member connected to the first inner tube for releasing the stent from the distal end of the stent housing.

[0025] In an alternative embodiment, the second inner tube is detachably connected to the release element.

[0026] In an optional embodiment, the second inner tube is screwed or snapped to the release element.

[0027] In an optional embodiment, the bracket receiving portion further includes a locking element connected to the first inner tube, the locking element being used for mounting the bracket.

[0028] In an optional embodiment, the stent housing further includes a sealing element connected to the first inner tube, the sealing element being used to open or block the distal end of the stent housing.

[0029] The beneficial effects of the embodiments of the present invention include, for example:

[0030] In summary, this embodiment provides an implanter with a non-stent receiving portion and a stent receiving portion detachably connected. During use, the non-stent receiving portion can slide through and within the endoscope's channel, enabling the implanter to work in conjunction with the endoscope. When the stent in the implanter needs to be replaced, both the non-stent receiving portion and the stent receiving portion can be disassembled first, and then only the stent receiving portion needs to be replaced, without needing to replace the non-stent receiving portion. Compared to traditional implanters that require replacing the entire implanter, the replacement operation of the implanter provided in this embodiment is more convenient and faster. It should be understood that in the field of implanters, the wall thickness of the stent receiving portion and the non-stent receiving portion is the same. In this embodiment, because the outer diameter of the stent receiving portion is larger than the outer diameter of the non-stent receiving portion, the inner diameter of the stent receiving portion is also larger than the inner diameter of the non-stent receiving portion. Compared to traditional TTS or OTW implanters, larger stents can be installed in the stent receiving portion, thereby achieving the function of releasing large stents under direct endoscopic visualization.

[0031] Furthermore, since the stent housing and the non-stent housing are detachably connected, during installation, the non-stent housing and the stent housing can be separated first, and the stent housing can be placed outside the endoscope. The stent housing does not need to enter the endoscope's channel. The size of the stent housing is not limited by the size of the endoscope's channel. The outer diameter of the stent housing can be designed to be larger and larger than the inner diameter of the channel, thereby giving the stent housing a larger inner diameter to accommodate a larger stent with stronger support. This not only allows for the release of stents larger than those that can be released by TTS under direct endoscopic visualization, but also allows for the release of stents larger than those that can be released by OTW under direct endoscopic visualization. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of guidewire insertion into the body.

[0034] Figure 2 A schematic diagram of OTW implantation into the body;

[0035] Figure 3 This is a schematic diagram of the implanter being placed inside the body according to this embodiment;

[0036] Figure 4 This is a cross-sectional view of the implanter provided in this embodiment;

[0037] Figure 5 This is an exploded view of the implanter provided in this embodiment;

[0038] Figure 6 This is a schematic diagram of the release element provided in this embodiment;

[0039] Figure 7 This is a schematic diagram of the structure of the first connector provided in this embodiment;

[0040] Figure 8 This is a schematic diagram of the structure of the second connector provided in this embodiment;

[0041] Figure 9 This is a cross-sectional view of the third connector provided in this embodiment;

[0042] Figure 10 This is a schematic diagram of the implanter provided in this embodiment;

[0043] Figure 11 for Figure 10 A magnified schematic diagram of the local structure;

[0044] Figure 12 This is a schematic diagram of the card provided in this embodiment.

[0045] icon:

[0046] 10-OTW inserter; 20-pylorus; 30-guidewire;

[0047] 001-Insertion device; 100-Non-support receiving part; 110-Second inner tube; 120-Second outer tube; 130-Handle; 140-Second connector; 141-Second channel; 142-First insertion part; 143-Limiting part; 144-Second insertion part; 150-Third connector; 151-Third channel; 1511-First cavity segment; 1512-Second cavity segment; 200-Support receiving part; 210-First outer tube; 220-First inner tube; 230-Release element; 231-Installation channel; 232-Installation part; 233-Pushing part; 240-First connector; 241-First channel; 242-First connecting segment; 243-Second connecting segment; 250-Sealing element; 260-Clamping element; 261-Inner sleeve; 262-Outer ring frame. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0050] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0051] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention.

[0052] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0053] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0054] It should be noted that currently, the main types of stent placement devices include OTW (Over The Wire) placement devices and TTS (Through The Scope) placement devices.

[0055] Please see Figure 1 and Figure 2 ,in, Figure 2The dotted line in the diagram indicates the position of the guidewire 30 after it yields to the OTW inserter. The OTW inserter 10, also known as the stent inserter, does not pass through the endoscope's clamping channel; it is guided only by the guidewire 30 and X-ray-assisted observation to reach the lesion site for placement of a self-expanding metal stent. The OTW inserter 10 can insert large-sized stents, for example, stents with a size greater than or equal to 4mm. Due to the large stent size, the outer diameter of the OTW inserter 10 must be correspondingly larger. However, because the outer diameter of the OTW inserter 10 is too large, there is insufficient space in the intestine to accommodate the endoscope during the procedure. The OTW inserter 10 relies solely on the guidewire 30 for guidance as it moves through the intestine. Since the guidewire 30 cannot provide sufficient support for the OTW inserter 10 to turn, the OTW inserter 10 can only reach a limited location within the body, making it difficult to pass through the pylorus 20 to reach the duodenum, large intestine, small intestine, and bile ducts.

[0056] The TTS (Transcatheter Transplanter) device, also known as a stent implanter, is inserted through the forceps channel of an endoscope, allowing direct visualization via the endoscope for the placement of a self-expanding metallic stent. The TTS device is used to implant small-sized stents; correspondingly, its outer diameter can be designed to be smaller than that of the OTW (Overhead Wedge) device 10. The TTS device can be used in conjunction with an endoscope and can bend with the aid of the endoscope, thus reaching farther locations. However, due to its small outer diameter, the TTS device can only accommodate a small diameter stent, resulting in weaker support for the stent at the lesion site, thus limiting its usability.

[0057] Meanwhile, the existing implant is a single unit, so when replacing the implant, the entire implant needs to be replaced.

[0058] In view of this, this embodiment provides an inserter 001 for inserting a stent into a patient's body. The inserter 001 is configured as a detachable structure and has the advantages of both OTW and TTS stents, allowing for the release of large-sized stents under direct endoscopic visualization.

[0059] It should be noted that, in this embodiment, those skilled in the art will understand that when the implanter 001 is in use, the front end of the implanter 001 is in contact with the human body, and the rear end of the implanter 001 is for operation by the operator. For ease of description, in the following text, the end of each component of the implanter 001 that is closer to the front end of the implanter 001 is referred to as the distal end, and the end of each component that is closer to the rear end of the implanter 001 is referred to as the proximal end.

[0060] Please see Figure 4 and Figure 5In this embodiment, the inserter 001 includes a non-stent receiving portion 100 and a stent receiving portion 200. The non-stent receiving portion 100 is used to pass through the endoscope's channel and slides within the channel. The stent receiving portion 200 has a receiving cavity for receiving a stent. The non-stent receiving portion 100 and the stent receiving portion 200 are detachably connected, and their cooperation allows the stent located in the receiving cavity to be released from the distal end of the stent receiving portion 200. The outer diameter of the stent receiving portion 200 is larger than the outer diameter of the non-stent receiving portion 100.

[0061] Optionally, the support receiving portion 200 includes a first outer tube 210, a first inner tube 220, and a release member 230 for placing the support. The first inner tube 220 passes through the first outer tube 210, and the first inner tube 220 and the first outer tube 210 together form an annular space for mounting the support. The release member 230 is sleeved outside the first inner tube 220 and located inside the first outer tube 210. Both ends of the first outer tube 210 are open, and the release member 230 slides with the first outer tube 210 to release the support inside the first outer tube 210 from the distal end of the first outer tube 210.

[0062] Optionally, the first inner tube 220 and the release member 230 are fixed relative to each other in the extension direction of the first inner tube 220, that is, the two can slide together relative to the first outer tube 210 in the extension direction of the first outer tube 210.

[0063] Optionally, the non-support receiving portion 100 includes a second inner tube 110 and a second outer tube 120. The second inner tube 110 is inserted into the second outer tube 120, and the second inner tube 110 and the second outer tube 120 are slidably engaged along the extending direction of the second outer tube 120.

[0064] In this embodiment, optionally, the second outer tube 120 is detachably connected to the first outer tube 210 and / or the first inner tube 220 is detachably connected to the release member 230. When the stent receiving portion 200 and the non-stent receiving portion 100 are connected, the second inner tube 110 communicates with the first inner tube 220 for the guide wire to pass through. The second inner tube 110 is used to drive the release member 230 to approach the distal end of the first outer tube 210 so that the stent is released from the distal end of the first outer tube 210.

[0065] It should be noted that the second inner tube 110 can be detachably connected to the first inner tube 220. By driving the first inner tube 220 to move, the release component 230 installed on the first inner tube 220 can be moved to perform the release operation of the bracket.

[0066] The implanter 001 provided in this embodiment has a second outer tube 120 detachably connected to a first outer tube 210, and a second inner tube 110 detachably connected to a release member 230. Before the stent is released, the second outer tube 120 can be separated from the first outer tube 210, and the second inner tube 110 can be separated from the release member 230. When a stent implantation surgery is required, the stent is placed into the first outer tube 210, which is adapted to the size of the stent. Then, the second inner tube 110 is connected to the release member 230, and the first outer tube 210 is connected to the second outer tube 120. Obviously, the release member 230 and the first inner tube 220 in the first outer tube 210 both correspond to the specifications of the first outer tube 210. After connection, the inserter 001 can be delivered to the lesion site using an endoscope. The second outer tube 120 is held and the second inner tube 110 is pushed, so that the second inner tube 110 moves relative to the second outer tube 120 and drives the release member 230 to move toward the distal end of the first outer tube 210. The release member 230 pushes the stent located in the first outer tube 210, thereby releasing the stent from the distal end of the first outer tube 210 to the lesion site.

[0067] It should be noted that the second outer tube 120 and the first outer tube 210 are detachably connected. The second outer tube 120 is inserted into the endoscope's channel, and the first outer tube 210 is used to place a support and can be located outside the endoscope. In other words, the outer diameter of the first outer tube 210 is not limited by the inner diameter of the channel; the outer diameter of the first outer tube 210 can be designed to be larger than the inner diameter of the channel. It should be understood that the outer diameter of the first outer tube 210 can be designed to be no larger than the inner diameter of the channel, allowing the first outer tube 210 to pass through the channel.

[0068] In this embodiment, the outer diameter of the support receiving portion 200 is larger than the outer diameter of the non-support receiving portion 100. That is, the outer diameter of the first outer tube 210 is larger than the outer diameter of the second outer tube 120. In the field of implantation devices, the wall thickness of the first outer tube 210 and the second outer tube 120 is the same. Therefore, it can be seen that the inner diameter of the first outer tube 210 can be designed to be larger than the inner diameter of the second outer tube 120. That is, the inner diameter of the first outer tube 210 is not limited by the inner diameter of the second outer tube 120 and the clamp channel, and can be designed to be larger, so that a larger size support can be installed in the first outer tube 210.

[0069] It should be noted that when the inner diameter of the first outer tube 210 is greater than the inner diameter of the second outer tube 120 and the outer diameter of the first outer tube 210 is not greater than the inner diameter of the clamp channel, the first outer tube 210 can pass directly through the clamp channel. When the inserter 001 is used in conjunction with the endoscope, the connected inserter 001 can be directly inserted into the clamp channel through the distal end of the support receiving part 200 and then extended from the distal end of the clamp channel to complete the assembly of the inserter 001 and the endoscope.

[0070] When the inner diameter of the first outer tube 210 is greater than the inner diameter of the second outer tube 120 and the outer diameter of the first outer tube 210 is greater than the inner diameter of the clamp channel, the first outer tube 210 cannot pass through the clamp channel. In this case, when installing the inserter 001 and the endoscope, the inserter 001 is first disassembled into a support receiving part 200 and a non-support receiving part 100. Then, the non-support receiving part 100 is inserted into the clamp channel and its distal end extends out of the distal end of the clamp channel. Then, the proximal end of the support receiving part 200 is connected to the distal end of the non-support receiving part 100.

[0071] It should be understood that when the inner diameter of the first outer tube 210 is designed to be larger than that of the endoscope in the second outer tube 120 or even larger than the inner diameter of the forceps channel, a strong support can be installed in the first outer tube 210, so that the inserter 001 can release a large-sized support when working with the endoscope. The size range of the large-sized support includes, but is not limited to, the size range of the support released by the OTW inserter. In other words, when releasing a large-sized stent with an endoscope, the guidewire 30 can be inserted into the body first using the endoscope, with the distal end of the guidewire 30 aligned with the lesion location. Then, the endoscope is removed, and the distal ends of the second inner tube 110 and the second outer tube 120 are inserted into the forceps channel from the proximal end and extend out of the distal end of the forceps channel. The second inner tube 110 is then connected to the release element 230, and the second outer tube 120 is connected to the first outer tube 210. The proximal end of the guidewire 30 is inserted from the distal end of the first inner tube 220 and passes through the first inner tube 220 and the second inner tube 110 in sequence, and extends out from the proximal end of the inserter 001. This completes the assembly of the inserter 001 and the endoscope. Then, the endoscope and inserter 001 are inserted into the patient's body along the guidewire 30. With the assistance of the endoscope, the second outer tube 120 bends with the endoscope, and the first outer tube 210 changes the angle of its distal end as the second outer tube 120 bends, so that both the first and second outer tubes 210 travel along the extension direction of the guidewire 30. Finally, the distal end of the first outer tube 210 reaches the lesion site smoothly. Then, the second inner tube 110 is manipulated to move the release element 230 to release the stent. After the stent is released, the inserter 001 and the endoscope are withdrawn from the body.

[0072] Please see Figure 3 The implanter 001 provided in this embodiment can combine the advantages of the OTW implanter 10 and the TTS implanter. When inserting a large-sized stent, it can also pass through the pylorus 20 with the help of an endoscope, thereby placing the large-sized stent into the duodenum, large intestine, small intestine and bile duct, etc. It has a wide range of applications and good treatment effect.

[0073] In this embodiment, optionally, the cross-section of the first outer tube 210 is annular, where the cross-section refers to a plane perpendicular to the extension direction of the first outer tube 210. The proximal and distal ends of the first outer tube 210 are open along its length, facilitating connection with the second outer tube 120 and also facilitating the release of the stent housed in the first outer tube 210 from the distal end. The lumen of the first outer tube 210 is the receiving cavity for accommodating the stent.

[0074] In this embodiment, optionally, the first inner tube 220 is a cylindrical tube with an annular cross-sectional shape, wherein the cross-section of the first inner tube 220 refers to a plane perpendicular to its extension direction. Both ends of the first inner tube 220 are open along its length.

[0075] Please see Figure 6 In this embodiment, optionally, the release member 230 has a circular cross-sectional shape, matching the shape of the cavity of the first outer tube 210, facilitating the ejection of the bracket from the distal end of the first outer tube 210. The release member 230 is provided with an installation channel 231 extending along its length direction. The installation channel 231 can be a cylindrical hole, and the axis of the installation channel 231 is collinear with the axis of the release member 230. Further, the release member 230 includes a pushing part 233 and an installation part 232, which are coaxially arranged and integrally formed. The installation channel 231 passes through both the pushing part 233 and the installation part 232; in other words, the installation channel 231 extends along its length direction to the end face of the pushing part 233 away from the installation part 232 and the end face of the installation part 232 away from the pushing part 233, respectively. The outer diameter of the pushing part 233 is larger than the outer diameter of the installation part 232, and the outer peripheral surface of the installation part 232 is provided with external threads. The outer diameter of the pushing part 233 is smaller than the inner diameter of the first outer tube 210, so that the pushing part 233 can be assembled into the first outer tube 210. After the releasing part 230 is assembled with the first outer tube 210, the pushing part 233 contacts the tube wall of the first outer tube 210, while the mounting part 232 is far from the tube wall of the first outer tube 210 and does not contact it. This reduces the contact area between the releasing part 230 and the first outer tube 210, reduces friction, and facilitates the sliding of the releasing part 230 relative to the first outer tube 210 along the extension direction of the first outer tube 210, thus facilitating the pushing of the bracket.

[0076] Please see Figure 5 In this embodiment, optionally, the stent receiving portion 200 further includes a first connector 240 and a sealing member 250. The first connector 240 is connected to the proximal end of the first outer tube 210, and the sealing member 250 is connected to the distal end of the first outer tube 210. The sealing member 250 and the first outer tube 210 slide in cooperation along the extension direction of the first outer tube 210 to block or open the distal end of the first outer tube 210.

[0077] Please see Figure 7Optionally, the first connector 240 has a first channel 241, which is connected to the proximal end of the first outer tube 210, and the first channel 241 communicates with the lumen of the first outer tube 210. The first channel 241 may be a cylindrical hole, and further, the first channel 241 may be at least partially a threaded hole.

[0078] Furthermore, the first connector 240 includes a coaxial first connecting segment 242 and a second connecting segment 243. Both the first connecting segment 242 and the second connecting segment 243 are cylinders. The outer diameter of the first connecting segment 242 is smaller than the outer diameter of the second connecting segment 243. The first channel 241 passes through both the first connecting segment 242 and the second connecting segment 243, and the axis of the first channel 241, the axis of the first connecting segment 242, and the axis of the second connecting segment 243 are collinear.

[0079] Optionally, the distal end of the sealing element 250 is a conical surface, which is also the distal end of the entire implant 001. Therefore, setting the distal end of the sealing element 250 to a conical surface reduces resistance and facilitates movement within the body. The sealing element 250 is provided with a through hole, with its two ends located at the proximal and distal ends of the sealing element 250, respectively. The through hole can be a cylindrical hole.

[0080] The assembly method of the support receiving portion 200 and the release assembly provided in this embodiment includes, for example:

[0081] The release member 230 is fitted over the first inner tube 220 from its proximal end, with the mounting portion 232 of the release member 230 fixedly connected to the proximal end of the first inner tube 220. Then, the release member 230 is inserted into the first outer tube 210, with the mounting portion 232 near the proximal end of the first outer tube 210 and the pushing portion 233 near the distal end of the first outer tube 210. Next, the first connecting end of the first connector 240 is inserted into the proximal end of the first outer tube 210, and the first connector 240 is fixedly connected to the first outer tube 210. Since the outer diameter of the second connecting segment 243 is larger than the outer diameter of the first connecting segment 242, when assembling the first connector 240 and the first outer tube 210, once the end face connecting the second connecting segment 243 and the first connecting segment 242 abuts against the end face of the first outer tube 210, the first connector 240 cannot continue to move, meaning the first connector 240 is properly inserted, thereby improving assembly efficiency and accuracy. When the release element 230 is assembled into the first outer tube 210, the distal end of the first inner tube 220 protrudes from the distal end of the first outer tube 210. At this time, the proximal end of the sealing element 250 is aligned with the first inner tube 220, so that the first inner tube 220 is inserted into the through hole, completing the fixed connection between the first inner tube 220 and the sealing element 250. After assembly, the axes of the first outer tube 210, the first connector 240, the first inner tube 220, the release element 230, and the sealing element 250 are collinear.

[0082] Obviously, the assembly method of the bracket receiving part 200 is not limited to the steps described above, and the steps described above do not limit the assembly method.

[0083] Please see Figure 8 and Figure 9 In this embodiment, optionally, the non-support receiving portion 100 further includes a second connector 140 and a third connector 150. The second connector 140 is connected to the second outer tube 120, and the third connector 150 is connected to the second inner tube 110. The second connector 140 is detachably connected to the first connector 240; in other words, the second connector 140 and the first connector 240 form a connecting assembly to achieve a detachable connection between the first outer tube 210 and the second outer tube 120. The third connector 150 is detachably connected to the release member 230.

[0084] Please see Figure 8 Optionally, the second connector 140 is provided with a second channel 141, which extends through the opposite ends of the second connector 140 along the extension direction of the second connector 140. The second channel 141 can be a cylindrical channel.

[0085] Furthermore, the second connector 140 includes a first insertion portion 142, a limiting portion 143, and a second insertion portion 144. The first insertion portion 142 is connected to the second insertion portion 144. The outer peripheral surface of the first insertion portion 142 is provided with external threads, and the outer peripheral surface of the second insertion portion 144 is also provided with external threads. The second channel 141 passes through both the first insertion portion 142 and the second insertion portion 144. The limiting portion 143 is disposed on the first insertion portion 142 and / or the second insertion portion 144. In this embodiment, optionally, the limiting portion 143 is disposed at the connection position of the first insertion portion 142 and the second insertion portion 144, and simultaneously protrudes radially outward from the outer peripheral surfaces of the first insertion portion 142 and the second insertion portion 144 along the second channel 141.

[0086] Furthermore, the limiting portion 143 can be a protrusion or an annular structure extending along the axis of the second connector 140. When the limiting portion 143 is set as a protrusion, the number of limiting portions 143 can be one or more. When the number of limiting portions 143 is multiple, the multiple limiting portions 143 are arranged at intervals along the circumference of the second connector and located on the same circumference.

[0087] Please see Figure 9 In this embodiment, optionally, the third connector 150 is provided with a third channel 151, which can be a cylindrical hole, and the third channel 151 extends along the extension direction of the third connector 150.

[0088] Furthermore, the third channel 151 includes a first cavity 1511 and a second cavity 1512 that are coaxial and connected. The inner diameter of the first cavity 1511 is larger than the inner diameter of the second cavity 1512, and at least a portion of the first cavity 1511 is configured as a threaded hole.

[0089] The assembly method of the non-support receiving part 100 provided in this embodiment includes, for example:

[0090] The second outer tube 120 is sleeved outside the second inner tube 110. The second insertion portion 144 of the second connector 140 is inserted into the second outer tube 120 from its distal end and is fixedly connected to it. For example, the second connector 140 and the second outer tube 120 can be connected by threads. Since the second connector 140 has a limiting portion 143, when the second insertion portion 144 is inserted into the second outer tube 120 and the limiting portion 143 abuts against the distal end of the second outer tube 120, the assembly position of the second insertion portion 144 is in place, improving assembly efficiency. Simultaneously, it avoids the situation where the limiting portion 143 fails to abut against the second outer tube 120 during assembly, resulting in an insecure assembly between the second outer tube 120 and the second connector 140. The distal end of the second inner tube 110 extends beyond the distal end of the second outer tube 120 and fixes the third connector 150 to the distal end of the second inner tube 110. During installation, the distal end of the second inner tube 110 is inserted into the second cavity 1512 of the third connector 150 from the end furthest from the first cavity 1511. That is, the first cavity 1511 corresponds to the distal end of the third connector 150. After the non-support receiving part 100 is assembled, the axes of the second inner tube 110, the second outer tube 120, the second connector 140, and the third connector 150 are collinear.

[0091] Obviously, the assembly method of the non-support receiving part 100 is not limited to the steps described above, and the steps described above do not limit the assembly method.

[0092] The inserter 001 provided in this embodiment, before being used with an endoscope, separates the non-stent receiving portion 100 and the stent receiving portion 200. After assembly, it is then used with an endoscope to release the stent to the lesion site. Optionally, when stent placement surgery is required using the inserter 001, a stent receiving portion 200 matching the stent size is selected. The occlusion member 250 of the stent receiving portion 200 is operated to open the distal end of the first outer tube 210, and the stent is inserted into the first outer tube 210 from the distal end. The stent is located in the annular space jointly defined by the first inner tube 220 and the first outer tube 210. Then, the occlusion member 250 is operated to seal the distal end of the first outer tube 210, thus completing the stent installation. Then, the guide wire 30 is placed into the lesion site with the endoscope, and then the endoscope is withdrawn. Externally, the distal ends of the second outer tube 120 and the second inner tube 110 are inserted into the proximal end of the endoscope's channel, and the second connector 140 and the third connector 150 both extend out of the distal end of the endoscope's channel. Then, the first cavity section 1511 of the third connector 150 is fitted over the mounting portion 232 of the release member 230 and screwed together. The first insertion portion 142 of the second connector 140 is inserted into the first channel 241 of the first connector 240 and screwed together. At this point, the assembly of the inserter 001 is completed. When assembling the first connector 240 and the second connector 140, because the second connector 140 has a limiting part 143, when the first insertion part 142 enters the first channel 241 and the limiting part 143 abuts against the proximal end of the first connector 240, the assembly position of the second connector 140 and the first connector 240 is in place, which is convenient and accurate and reliable, avoiding situations where the first connector 240 and the second connector 140 are not properly assembled, making the surgery safer and more reliable. Then, the proximal end of the guidewire 30 is inserted from the distal end of the inserter 001 and extends from the proximal end of the inserter 001, wherein the guidewire 30 passes sequentially through the occlusion member 250, the first inner tube 220 and the second inner tube 110. After the inserter 001, endoscope, and guidewire 30 are assembled, the inserter 001 is inserted into the lesion location along the extension direction of the guidewire 30 with the help of the endoscope. During the movement of the inserter 001, since the second outer tube 120 is located in the forceps channel of the endoscope, the second outer tube 120 can bend along the direction of travel of the guidewire 30 with the help of the endoscope, so that it can pass through the pylorus 20 and insert a large-sized stent into a more distant lesion location, thus having a wide range of applications.

[0093] It should be noted that the first connector 240 and the second connector 140 may not be connected by screws. For example, the first connector 240 and the second connector 140 may also be connected by an interference fit or a snap-fit ​​or other detachable connection method.

[0094] Alternatively, the second connector 140 may be screwed onto the outside of the first connector 240. For example, an internally threaded hole is provided at the distal end of the second connector 140, and a protruding stud is provided at the proximal end of the first connector 240, the stud being screwed into the internally threaded hole.

[0095] It should be noted that the third connector 150 and the release element 230 do not have to be connected by screws. For example, the third connector 150 and the release element 230 can also be connected by an interference fit or a snap-fit, etc., for a detachable connection.

[0096] Please see Figure 10 and Figure 11 It should be noted that the inserter 001 also includes a handle 130. The second inner tube 110 and the second outer tube 120 are both connected to the handle 130. By operating the handle 130, the second outer tube 120 and the second inner tube 110 can be driven to move relative to each other, making the operation convenient and reliable.

[0097] Please see Figure 5 In other embodiments, the bracket receiving portion 200 further includes a locking member 260, which is sleeved outside the first inner tube 220 and fixedly connected to it. The outer peripheral surface of the locking member 260 and the inner peripheral wall of the first outer tube 210 form an annular space for accommodating the bracket, and the bracket is sleeved outside the locking member 260. By providing the locking member 260, the friction between the bracket and the locking member 260 can be increased, allowing the bracket to be retracted during the release process. That is, during the release process, the second inner tube 110 can be pulled to move the release member 230 away from the distal end of the first outer tube 210, thereby causing the bracket to retract by moving it away from the distal end of the first outer tube 210 through the locking member 260.

[0098] Please see Figure 12 Optionally, the clip 260 includes an inner sleeve 261 and an outer ring frame 262. The inner sleeve 261 is sleeved outside the first inner tube 220 and fixedly connected to the first inner tube 220. The outer ring frame 262 is sleeved outside the inner sleeve 261 and fixedly connected to the inner sleeve 261. The outer ring frame 262 has multiple bends in its circumferential direction.

[0099] The implanter 001 provided in this embodiment does not require replacing the entire implanter 001 when releasing stents of different sizes; at the same time, it has the advantages of OTW stents and TTS stents, and can release large-sized stents under direct endoscopic visualization, making the implanter 001 widely applicable.

[0100] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An inserter for use with a medical endoscope, characterized in that, include: The endoscope includes a non-stent receiving portion and a stent receiving portion, the non-stent receiving portion being detachably connected to the stent receiving portion, the non-stent receiving portion and the stent receiving portion cooperating to release a stent located within the stent receiving portion; the non-stent receiving portion is passable through the forceps channel of the endoscope; the outer diameter of the stent receiving portion is larger than the outer diameter of the non-stent receiving portion. The support receiving portion includes a first outer tube for receiving the support, and the non-support receiving portion includes a second outer tube, the first outer tube and the second outer tube being detachably connected; The support receiving portion further includes a first inner tube, and the non-support receiving portion includes a second inner tube, wherein the first inner tube and the second inner tube are detachably connected; The stent housing further includes a release member connected to the first inner tube for releasing the stent from the distal end of the stent housing; the second inner tube is detachably connected to the release member. The outer diameter of the first outer tube is larger than the inner diameter of the clamp channel, and the first outer tube cannot pass through the clamp channel; Before the stent is released, the second outer tube is separated from the first outer tube, and the second inner tube is separated from the release device. When assembling the inserter and endoscope, the non-stent receiving part is inserted into the endoscope channel, and the distal ends of the second outer tube and the second inner tube extend beyond the distal end of the channel. The stent is inserted into the first outer tube, which is the size of the stent, and then the second inner tube is connected to the release device, and the first outer tube is connected to the second outer tube. After the connection is completed, with the assistance of the endoscope, the first outer tube and the second outer tube are both moved along the extension direction of the guidewire, so that the distal end of the first outer tube can reach the lesion site smoothly. The second inner tube is manipulated to move the release device to release the stent.

2. The implant according to claim 1, characterized in that: The outer diameter of the support receiving part is larger than the inner diameter of the clamp channel.

3. The implant according to claim 1, characterized in that: The first outer tube and the second outer tube are screwed or snap-fitted together.

4. The implanter according to claim 1, characterized in that: The first outer tube and the second outer tube are detachably connected by a connecting assembly.

5. The implanter according to claim 4, characterized in that: The connection assembly includes a first connector and a second connector, the first connector being connected to the first outer tube and the second connector being connected to the second outer tube; the first connector and the second connector are detachably connected.

6. The implant according to claim 5, characterized in that: The first connector and the second connector are screwed or snap-fitted together.

7. The implanter according to claim 5, characterized in that: The first connector is inserted into the proximal end of the first outer tube.

8. The implant according to claim 5, characterized in that: A portion of the second connector is inserted into the distal end of the second outer tube, and the remaining portion of the second connector protrudes from the distal end of the second outer tube. The portion of the second connector protruding from the second outer tube is inserted into the first connector and detachably connected to the first connector.

9. The implant according to claim 1, characterized in that: The inner diameter of the first outer tube is larger than the inner diameter of the second outer tube.

10. The implant according to claim 1, characterized in that: The first inner tube and the second inner tube are screwed or snap-fitted together.

11. The implant according to claim 1, characterized in that: The first inner tube and the second inner tube are detachably connected by a third connector.

12. The implant according to claim 11, characterized in that: The third connector is connected to the second inner tube, and the first inner tube is detachably connected to the third connector.

13. The implant according to claim 12, characterized in that: The third connector is screwed or snapped into the first inner tube.

14. The implant according to claim 1, characterized in that: The second inner tube is screwed or snapped to the release element.

15. The implant according to claim 1, characterized in that: The bracket receiving part further includes a locking element, which is connected to the first inner tube and is used for mounting the bracket.

16. The implant according to claim 1, characterized in that: The stent receiving portion further includes a sealing member, which is connected to the first inner tube and is used to open or seal the distal end of the stent receiving portion.

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