Gastric weight loss device using endoscopic transparent cap to release stent

Abstract

The application discloses a gastric weight loss device for releasing a stent by using an endoscope transparent cap, which comprises an endoscope transparent cap and a stent component; the endoscope transparent cap comprises an endoscope joint, a sliding sleeve, a guide pipe and a driving component; the endoscope joint is used for sleeving a distal end of an endoscope, a sliding ring in the sliding sleeve is arranged on the endoscope joint, and the stent component is compressed on the outside of the endoscope joint and the inside of the sliding sleeve; the guide pipe is arranged on the peripheral wall of the endoscope, the driving component is arranged on the proximal end of the endoscope, and the endoscope joint is connected through the guide pipe and the driving component; the sliding ring is transmissionally connected through a first driving tendon and the driving component; the driving component is configured to drive the sliding ring to move towards the proximal end by pulling the first driving tendon, so as to expose the stent component, and drive the sliding ring to move towards the distal end by pushing the first driving tendon, so as to push away the stent component. When the device is applied, the operation is relatively simple and convenient, the efficiency of stent placement can be greatly improved, and the time of stent placement surgery can be shortened.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to an intragastric weight loss device that uses an endoscopic transparent cap to release a stent. Background Technology

[0002] In the field of digestive health, the traditional treatment for obesity is surgical gastric bypass surgery (such as Roux-en-Y gastric bypass). This method effectively reduces weight by dividing the stomach into smaller pouches that bypass part of the small intestine, thus restricting food intake and absorption. However, the clinical application of surgical gastric bypass surgery is limited due to its inherent invasiveness, long recovery period, and potential complications (such as anastomotic leakage and malnutrition). To reduce treatment risks, endoscopic interventional weight loss techniques have gradually emerged, among which gastric bypass stent placement is commonly used.

[0003] Endoscopic duodenojejunal bypass stent placement, also known as gastric bypass stent placement, primarily mimics the physiological mechanism of gastric bypass surgery. A membranous cannula is inserted into the duodenum and upper jejunum via endoscopy to isolate chyme from the intestinal mucosa, shortening the contact path between the chyme and the intestinal mucosa and thus achieving weight loss. Currently, the procedure involves first inserting a guidewire into a predetermined position using an endoscope, then retracting the endoscope and connecting the guidewire and the stent delivery device. Next, under endoscopic guidance, the guidewire guides the delivery device to insert the stent into the predetermined position, and finally, the stent is released using the delivery device. This method requires repeated endoscopic manipulation, and at least three people are needed to operate the endoscope, support the guidewire, and operate the delivery device during stent delivery and release. The procedure is cumbersome, complex, and inconvenient, resulting in low stent placement efficiency and a lengthy surgical time.

[0004] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects remains a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide an intragastric weight loss device that uses an endoscopic transparent cap to release a stent. The device is relatively simple and convenient to operate, and can greatly improve the efficiency of stent placement and shorten the stent placement surgery time.

[0006] To address the aforementioned technical problems, this application provides an intragastric weight loss device that utilizes an endoscopic transparent cap to release a stent, comprising an endoscopic transparent cap and a stent component; the endoscopic transparent cap includes an endoscope connector, a sliding sleeve, a guide tube, and a drive component;

[0007] The sliding sleeve includes a sliding ring, the endoscope connector is used to fit the distal end of the endoscope, the sliding ring is sleeved on the endoscope connector, and the support component is compressed on the outside of the endoscope connector and the inside of the sliding sleeve.

[0008] The guide tube is located on the outer peripheral wall of the endoscope, the driving component is located at the proximal end of the endoscope, and the endoscope connector is connected to the driving component through the guide tube;

[0009] The sliding ring is connected to the driving component via a first driving tendon; the driving component is configured to drive the sliding ring to move proximally by pulling the first driving tendon to expose the support component, and to drive the sliding ring to move distally by pushing the first driving tendon to push away from the support component.

[0010] Optionally, the sliding sleeve further includes a retaining ring and a connecting ring;

[0011] Both the fixing ring and the connecting ring are sleeved on the endoscope connector, the proximal end of the sliding ring is connected to the fixing ring through the connecting ring, and the fixing ring is fixed to the endoscope connector;

[0012] The distal end of the first driving tendon is connected to the proximal end of the sliding ring and is located outside the connecting ring. Both the connecting ring and the sliding ring are made of flexible material. A receiving chamber is formed between the inner side of the sliding ring, at least part of the inner side of the connecting ring, and the outer side of the endoscope connector. The compressed stent component is located in the receiving chamber.

[0013] When the sliding ring moves toward the proximal end, it can drive the connecting ring to move toward the proximal end and overlap with the connecting ring on the outer peripheral wall of the fixed ring, so as to expose the bracket component.

[0014] Optionally, the gastric weight loss device that uses an endoscopic transparent cap to release a stent further includes a transmission ring and two or more second drive tendons;

[0015] The transmission ring and the sliding ring are coaxially arranged, and two or more second driving tendons are evenly spaced along the circumference of the sliding ring. The proximal end of the sliding ring is connected to the distal end of the transmission ring through two or more second driving tendons, and the distal end of the first driving tendon is fixed to the proximal end of the transmission ring.

[0016] The outer wall of the guide tube is provided with a limiting groove that extends through the width direction, and the transmission ring is at least partially located within the limiting groove;

[0017] During the movement of the first drive tendon towards the proximal or distal end, the transmission ring can respectively abut against the two side walls of the limiting groove.

[0018] Optionally, the endoscope connector includes a connector body; the outer peripheral wall of the connector body is provided with a second annular step, the second annular step having a second step surface facing distally; the fixing ring is sleeved on the outer peripheral wall corresponding to the second annular step and abuts against the second step surface at its proximal end face; the sliding ring can abut against the second step surface at its proximal end face during movement towards the proximal end; and / or,

[0019] The endoscope connector includes a connector body; the outer peripheral wall of the connector body is provided with a second annular step, the second annular step having a second step surface facing the distal end; the outer outer wall of the guide tube is provided with a first path groove extending along the length direction, and the outer peripheral wall of the connector body is provided with two or more second path grooves extending axially on the side of the second step surface near the proximal end, the distal end face of the guide tube abuts against the proximal end face of the connector body, one of the second path grooves communicating with the first path groove; the distal end of the second driving tendon is fixed to the proximal end face of the sliding ring, each of the second driving tendons is respectively engaged in each of the second path grooves, and the first driving tendon and one of the second driving tendons are respectively engaged in the first path groove; and / or,

[0020] The driving component includes a driving handle and a push-pull rod; the push-pull rod is slidably disposed on the driving handle, and the proximal end of the first driving tendon is connected to the push-pull rod, so that pulling or pushing the push-pull rod can pull or push the first driving tendon.

[0021] Optionally, the sliding sleeve further includes a stop portion;

[0022] The stop portion is located at the distal end of the sliding ring, and the proximal end face of the stop portion abuts against the distal end face of the endoscope connector. The stop portion is made of a flexible material.

[0023] When the sliding ring moves proximally, it can cause the stop portion to move away from the distal end face of the endoscope connector.

[0024] Optionally, the stop portion includes a plurality of stop plates; the stop plates are fan-shaped rings, and the plurality of stop plates are distributed at intervals along the circumference of the sliding ring and share a common center; and / or,

[0025] The proximal end face of the stop and the distal end face of the endoscope connector are connected by a plurality of fixing points; the fixing points are configured to break when the tensile force on the stop exceeds a preset tensile force threshold, so that the stop moves away from the distal end face of the endoscope connector.

[0026] Optionally, the stent component includes a first stent, a valve cannula, a second stent, and a sheath cannula that are sequentially fixed and connected from the proximal end to the distal end;

[0027] The support component is sleeved on the outer peripheral wall of the endoscope connector, the guide tube has a first medium channel, the drive component has a second medium interface, and the first support is connected through the first medium channel and the second medium interface; both the first support and the second support are made of shape memory alloy material.

[0028] Optionally, the endoscope connector includes a connector body and at least one first media interface;

[0029] The outer peripheral wall of the connector body is provided with a first annular step, the first annular step has a first step surface facing the distal end, the first medium interface is provided on the first step surface, and the connector body is provided with at least one second medium channel on the side of the first step surface near the proximal end.

[0030] The compressed support component is located on the side of the first stepped surface near the distal end. The inlet end of the first medium interface is connected to the corresponding second medium channel, and the outlet end is inserted into the interior of the first support. The distal end face of the guide tube abuts against the proximal end face of the connector body. The second medium channel is connected to the first medium channel.

[0031] Optionally, the endoscope connector may further include at least one constraint post;

[0032] The constraint post is disposed on the first stepped surface and extends along the axial direction of the connector body. The compressed support component is at least partially constrained to the inner side of the constraint post. The first medium interface and the constraint post are distributed circumferentially at intervals in the connector body.

[0033] Optionally, there are two or more first media interfaces and two or more second media channels, with each of the two or more first media interfaces communicating with one or more of the two or more second media channels, and the two or more first media interfaces being evenly spaced along the circumference of the connector body; and / or,

[0034] There are two or more constraint posts, and the two or more constraint posts are evenly spaced along the circumference of the joint body; and / or,

[0035] The outer peripheral walls of the first bracket and the second bracket are respectively provided with multiple rings of fixing spikes; the multiple rings of fixing spikes are arranged at intervals along the axial direction of the bracket component.

[0036] The gastric weight loss device provided in this application comprises an endoscopic transparent cap and a support component. The endoscopic transparent cap includes an endoscope connector, a sliding sleeve, a guide tube, and a driving component. The endoscope connector is fitted onto the distal end of the endoscope. A sliding ring in the sliding sleeve is fitted onto the endoscope connector. The support component is compressed outside the endoscope connector and inside the sliding sleeve, thus compressing and storing the support component within the endoscopic transparent cap. Simultaneously, the guide tube is located on the outer peripheral wall of the endoscope, and the driving component is located at the proximal end of the endoscope. The endoscope connector is connected to the driving component via the guide tube, and the sliding ring is connected to the driving component via a first driving tendon. Operating the driving component to pull the first driving tendon moves the sliding ring proximally to expose the support component; operating the driving component to push the first driving tendon moves the sliding ring distally to push away the support component, allowing the support component to be placed into the gastrointestinal tract for weight loss treatment.

[0037] In this way, by using the transparent cap of the endoscope to compress and store the stent component, once the stent component is delivered to the correct position, the stent component can be exposed and released simply by operating the drive component. This not only eliminates the need for repeated endoscope operations, but also allows for the placement of the stent component by a minimum of one person, making the operation simpler and more convenient. This can significantly improve the efficiency of stent placement and shorten the time of stent placement surgery. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the installation structure of the gastric weight loss device using an endoscope transparent cap to release a stent, which is an embodiment of this application, on an endoscope.

[0039] Figure 2 This is a schematic diagram of the distal end of the intragastric weight loss device in the initial state according to the embodiments provided in this application;

[0040] Figure 3 This is a schematic diagram of the drive component in the gastric weight loss device provided in the embodiments of this application;

[0041] Figure 4 This is a schematic diagram of the structure of the gastric weight loss device provided in this application when the support component is exposed using an endoscopic transparent cap;

[0042] Figure 5 This is a schematic diagram of the structure of the gastric weight loss device according to an embodiment of this application after the medium is filled into the stent component through the transparent cap of the endoscope;

[0043] Figure 6 This is a schematic diagram of the gastric weight loss device according to an embodiment of this application after the stent component is released using an endoscopic transparent cap;

[0044] Figure 7 This is a schematic diagram of the sliding sleeve in the initial state of the gastric weight loss device provided in the embodiments of this application;

[0045] Figure 8 This is a schematic diagram of the structure of the gastric weight loss device provided in this application when the sliding sleeve moves proximally;

[0046] Figure 9 for Figure 8 Side view;

[0047] Figure 10 for Figure 9 Sectional view along axis AA;

[0048] Figure 11 for Figure 10 A magnified view of the area at point B;

[0049] Figure 12 This is a schematic diagram of the connection structure of the endoscope connector and guide tube in the gastric weight loss device provided in this application from one perspective.

[0050] Figure 13 This is a schematic diagram of the connection structure of the endoscope connector and guide tube in the gastric weight loss device provided in this application from another perspective;

[0051] Figure 14 for Figure 4 An axial sectional view of the intragastric weight-loss device shown.

[0052] Figure 15 for Figure 14 A magnified view of point C;

[0053] Figure 16 for Figure 6 A schematic diagram of the support component shown from another perspective;

[0054] Figure 17 for Figure 16 Side view;

[0055] Figure 18 for Figure 17 DD section view.

[0056] The reference numerals in the above figures are explained as follows:

[0057] 1-Endoscope connector, 11-Connector body, 11a-First annular step, 11a1-First step surface, 11b-Second medium channel, 11c-Second annular step, 11c1-Second step surface, 11d-Second path groove, 11e-Inner hole, 11f-Step hole, 11f1-Third step surface, 12-First medium interface, 13-Constraint post;

[0058] 2-Sliding sleeve, 21-Fixing ring, 22-Connecting ring, 23-Sliding ring, 24-Stop part, 241-Stop piece;

[0059] 3-Stent component, 3a-Foot passage, 31-First stent, 32-Valve cannula, 33-Second stent, 34-Sheath cannula;

[0060] 4-Guide tube, 4a-First medium channel, 4b-First path groove, 4c-Limiting groove;

[0061] 51-First driving tendon, 52-Second driving tendon, 53-Transmission ring;

[0062] 6-Drive component, 61-Drive handle, 62-Push-pull rod, 63-Second medium interface;

[0063] 7-Endoscope;

[0064] 8-Operating handle. Detailed Implementation

[0065] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] It should be noted that in this application, the terms "first" and "second" are used only to facilitate the description of two or more structures or components that are identical or similar in structure and / or function, and do not indicate any special limitation on order and / or importance.

[0067] In this application, "and / or" merely describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0068] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal connection between two components; it can be a mechanical connection or a communication connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0069] Please refer to Figures 1 to 6 , Figure 1 This is a schematic diagram of the installation structure of the gastric weight loss device provided in this application on an endoscope. Figure 2 This is a schematic diagram of the distal end of the intragastric weight loss device in the initial state according to the embodiments provided in this application. Figure 3 This is a schematic diagram of the drive component in the intragastric weight loss device provided in the embodiments of this application. Figure 4 This is a schematic diagram of the gastric weight loss device according to an embodiment of this application, showing the support component exposed by an endoscopic transparent cap. Figure 5This is a schematic diagram of the gastric weight loss device according to an embodiment of this application after the medium is filled into the stent component through the endoscopic transparent cap. Figure 6 This is a schematic diagram of the gastric weight loss device according to an embodiment of this application after the stent component is released using an endoscopic transparent cap. Figure 2 and Figure 5 The dashed lines in the attached chart represent structures or components that are not visible from the current viewpoint and are only used to help understand the relative positions of the corresponding structures or components.

[0070] In the embodiments provided in this application, such as Figure 1 and Figure 2 As shown, the gastric weight loss device using an endoscopic transparent cap to release a stent includes an endoscopic transparent cap and a stent component 3. The endoscopic transparent cap includes an endoscope connector 1, a sliding sleeve 2, a guide tube 4, and a driving component 6. The sliding sleeve 2 includes a sliding ring 23. The endoscope connector 1 is used to fit the distal end of the endoscope 7. The sliding ring 23 is fitted onto the endoscope connector 1. The stent component 3 is compressed on the outer side of the endoscope connector 1 and the inner side of the sliding sleeve 2. The guide tube 4 is located on the outer peripheral wall of the endoscope 7, and the driving component 6 is located at the proximal end of the endoscope 7. The endoscope connector 1 is connected to the driving component 6 through the guide tube 4. The sliding ring 23 is connected to the driving component 6 via a first driving tendon 51. In use, the driving component 6 is configured to drive the sliding ring 23 proximally by pulling the first driving tendon 51, so as... Figure 4 The exposed support component 3 is shown, and it can drive the sliding ring 23 to move distally by pushing the first drive tendon 51, so as... Figure 6 The push-away bracket component 3 is shown.

[0071] It is understood that the stent component 3 is compressed and stored inside the endoscope's transparent cap. By using the endoscope 7 to transport the endoscope's transparent cap, the stent component 3 can be transported. Based on the operation of the endoscope's transparent cap, the stent component 3 can be exposed and released.

[0072] The endoscope connector 1 has an endoscope channel for fitting the endoscope 7 and allowing surgical instruments mounted on the endoscope 7 to enter and exit. By fitting the endoscope connector 1 onto the distal end of the endoscope 7, the endoscope transparent cap and the support component 3 can be installed on the endoscope 7.

[0073] The endoscope 7 is provided with an operating handle 8 at its proximal end, and the driving component 6 can be located near the operating handle 8 so that the doctor can operate the driving component 6.

[0074] In such Figure 2 In the initial installation state shown, the support component 3 is compressed between the endoscope connector 1 and the sliding sleeve 2. When the drive component 6 is used as... Figure 4When the first driving tendon 51 is pulled proximally, the sliding ring 23 moves proximally, exposing the support component 3. After exposure, the support component 3 will... Figure 5 As shown, it gradually expands. When the first drive tendon 51 is pushed distally by the drive component 6, the sliding ring 23 moves distally, thus... Figure 6 The expanded stent component 3 is pushed away, that is, the stent component 3 is pushed distally, so that the stent component 3 leaves the endoscope transparent cap, thereby releasing the stent component 3 and placing the stent component 3 into the gastrointestinal tract.

[0075] After the expanded support component 3 is inserted into the gastrointestinal tract, it can shorten the contact path between the chyme and the intestine. In other words, it can shorten the contact time between the chyme and the intestine, thereby reducing the digestion and absorption of food by the intestinal wall, and thus achieving the goal of weight loss.

[0076] In this way, by using the transparent cap of the endoscope to compress and store the stent component 3, after the stent component 3 is delivered into place, only the driving component 6 at the proximal end of the endoscope 7 needs to be operated to expose and release the stent component 3. This not only eliminates the need for repeated operation of the endoscope, but also allows at least one person to complete the placement of the stent component 3, making the operation simpler and more convenient. This can greatly improve the efficiency of stent placement and shorten the time of stent placement surgery.

[0077] Of course, the gastric weight loss device provided in this application embodiment does not require repeated endoscopic operations, which also helps to reduce the damage to the gastrointestinal mucosa caused by stent placement and improve the safety of stent placement.

[0078] Moreover, compared to related technologies where the placement accuracy of bypass stents depends on the coordination between the endoscopic operator and the operator of the delivery component, which is often difficult to coordinate and results in low placement accuracy, the gastric weight loss device provided in this application requires only one doctor to operate the endoscope 7 and the drive component 6 after the stent component 3 is delivered in place. This avoids errors caused by the difficulty of coordination among multiple operators and allows for more precise control of the exposure and release of the stent component 3, thus significantly improving the placement accuracy of the stent.

[0079] Furthermore, compared to related technologies where the delivery component and guidewire of the bypass stent are connected by a simple snap-fit, making the bypass stent highly susceptible to displacement, rotation, or even detachment during delivery and release due to gastrointestinal peristalsis or endoscopic manipulation, this not only easily damages the gastrointestinal tract and poses a significant safety risk, but also makes it difficult to guarantee stent placement accuracy, and may even lead to stent placement failure. In contrast, the gastric weight loss device provided in this application compresses and stores the stent component 3 inside the transparent cap of the endoscope. During the entire process of the endoscope 7 delivering the stent component 3, the stent component 3 is not easily displaced due to gastrointestinal peristalsis or endoscopic manipulation, which can greatly improve the safety of stent placement operation, relatively guarantee the accuracy of stent placement, improve the success rate of stent placement, and achieve the goal of rapid weight loss for obese patients.

[0080] The sliding sleeve 2 is a key component for compressing, exposing, and releasing the stent component 3, and its structural performance directly affects the safety and efficiency of the stent component 3 insertion operation.

[0081] Please refer to this as well. Figures 7 to 11 , Figure 7 This is a schematic diagram of the sliding sleeve in the initial state of the gastric weight loss device provided in this application. Figure 8 This is a schematic diagram of the structure of the intragastric weight loss device according to the embodiments of this application, showing the sliding sleeve moving proximally. Figure 9 for Figure 8 Side view, Figure 10 for Figure 9 Sectional view along line AA, Figure 11 for Figure 10 A magnified view of a section at point B.

[0082] In actual setup, the specific structure of the sliding sleeve 2 is not limited.

[0083] like Figure 7 As shown, the sliding sleeve 2 also includes a fixing ring 21 and a connecting ring 22. Wherein, as... Figure 2 As shown, both the fixing ring 21 and the connecting ring 22 are fitted onto the endoscope connector 1. The proximal end of the sliding ring 23 is connected to the fixing ring 21 via the connecting ring 22, and the fixing ring 21 is fixed to the endoscope connector 1. The distal end of the first driving tendon 51 is connected to the proximal end of the sliding ring 23 and is located outside the connecting ring 22, and also outside the fixing ring 21. Both the connecting ring 22 and the sliding ring 23 are made of flexible material. A receiving chamber is formed between the inner side of the sliding ring 23, part of the inner side of the connecting ring 22, and the outer side of the endoscope connector 1, and the compressed support component 3 is located within the receiving chamber. In use, as... Figure 4 and Figure 8 As shown, when the sliding ring 23 moves toward the proximal end, it can drive the connecting ring 22 to move toward the proximal end and overlap with the connecting ring 22 on the outer peripheral wall of the fixed ring 21, so as to expose the bracket component 3.

[0084] It is easy to understand that pulling the first driving tendon 51 proximally drives the sliding ring 23 to move proximally. The sliding ring 23 then drives the connecting ring 22 to move proximally. Since the fixing ring 21 is fixed to the endoscope connector 1, the flexible connecting ring 22 will flip and deform, gradually fitting onto the fixing ring 21. The sliding ring 23 then fits onto the connecting ring 22. The sliding ring 23 and the connecting ring 22 are then sequentially stacked on the fixing ring 21 from the outside to the inside, while the stent component 3 is exposed. After the stent component 3 has fully expanded, pushing the first driving tendon 51 distally applies a thrust to the sliding ring 23, driving the sliding ring 23 to move distally, thus pushing the expanded stent component 3 away distally. During this process, the restoring elasticity of the connecting ring 22 also assists the sliding ring 23 in pushing the stent component 3, making the process of the sliding ring 23 pushing away from the stent component 3 smoother.

[0085] Thus, the structure of the sliding sleeve 2 is cleverly designed, and the movement of the sliding ring 23 towards the proximal end is made more stable and controllable by the connecting ring 22. It can be smoothly fitted onto the fixed ring 21 to expose the support component 3. It also makes the process of the sliding ring 23 pushing the support component 3 towards the distal end smoother, so as to release the support component 3 smoothly.

[0086] It is worth mentioning that in the above embodiments of this application, a receiving chamber is formed between the inner side of the sliding ring 23, the inner side of part of the connecting ring 22, and the outer side of the endoscope connector 1. In fact, the receiving chamber can also be formed between the inner side of the sliding ring 23, the inner side of the entire connecting ring 22, and the outer side of the endoscope connector 1. This application does not limit this.

[0087] In addition, the connecting ring 22 can be made thinner than the sliding ring 23. The connecting ring 22 can be connected to the inner part of the sliding ring 23, while the first driving tendon 51 can be connected to the outer part of the sliding ring 23, so that the sliding ring 23 can be more smoothly fitted onto the fixing ring 21.

[0088] In specific configurations, the connection method between the first driving tendon 51 and the sliding ring 23 is not limited.

[0089] Please combine Figure 8 Understood, in this embodiment of the application, the intragastric weight loss device further includes a transmission ring 53 and two or more second drive tendons 52. The transmission ring 53 and the sliding ring 23 are coaxially arranged, and the two or more second drive tendons 52 are evenly spaced along the circumference of the sliding ring 23. The proximal end of the sliding ring 23 is connected to the distal end of the transmission ring 53 through the two or more second drive tendons 52, and the distal end of the first drive tendon 51 is fixed to the proximal end of the transmission ring 53. Figure 2 As shown, the outer wall of the guide tube 4 is provided with a limiting groove 4c that extends through the width direction, and the transmission ring 53 is at least partially located within the limiting groove 4c. During the movement of the first drive tendon 51 towards the proximal or distal end, the transmission ring 53 can respectively abut against the two side walls of the limiting groove 4c.

[0090] In this way, not only can the tension or thrust of the first drive tendon 51 be relatively evenly distributed to each of the second drive tendons 52 through the transmission ring 53, so as to achieve the uniform transmission of tension or thrust to the sliding ring 23, making the movement of the sliding ring 23 towards the proximal or distal end more stable, thus making the exposure and release process of the stent component 3 more smooth and successful, but the transmission ring 53 can also cooperate with the limiting groove 4c of the guide tube 4 to limit the movement of the sliding ring 23, so as to control the movement stroke of the sliding ring 23 more conveniently and accurately, thereby controlling the exposure and release of the stent component 3 more conveniently and accurately, and thus improving the insertion safety, insertion accuracy and insertion efficiency of the stent component 3.

[0091] Furthermore, the arrangement of the transmission ring 53 and the second drive tendon 52 allows for the use of only one first drive tendon 51, facilitating the pulling or pushing operation control of the first drive tendon 51 by the proximal drive component 6. Of course, more than two first drive tendons 51 can also be used; this application does not impose any restrictions on this.

[0092] Furthermore, the number of second driving tendons 52 is not limited; there can be two or more. In the embodiments of this application, the second driving tendons 52 can be configured as follows: Figure 4 The four second drive tendons 52 shown are evenly spaced along the circumference of the sliding ring 23, which allows for more stable control of the movement of the sliding ring 23.

[0093] In fact, the transmission ring 53 and the second drive tendon 52 can be omitted, and the first drive tendon 51 and the sliding ring 23 can be directly connected to achieve the direct transmission of tension or thrust to the sliding ring 23. This application does not limit this.

[0094] It is worth mentioning that both the first driving tendon 51 and the second driving tendon 52 can be made of materials such as nickel-titanium wire, and this application does not impose any restrictions on this.

[0095] Please refer to this as well. Figures 12 to 15 , Figure 12 This is a schematic diagram of the connection structure of the endoscope connector and guide tube in the gastric weight loss device provided in this application, viewed from one angle. Figure 13 This is a schematic diagram of the connection structure of the endoscope connector and guide tube in the gastric weight loss device provided in this application from another perspective. Figure 14 for Figure 4 The axial sectional view of the intragastric weight loss device shown is shown. Figure 15 for Figure 14 A magnified view of a section at point C.

[0096] Endoscope connector 1 is a component for installing endoscope 7 and for cooperating with sliding sleeve 2 to control support component 3. In actual installation, its specific structure is not limited.

[0097] In the embodiments provided in this application, please refer to Figure 12 and Figure 13 Understandably, the endoscope connector 1 includes a connector body 11; the outer peripheral wall of the connector body 11 is provided with a second annular step 11c, the second annular step 11c having a second step surface 11c1 facing the distal end. For example... Figure 2 and Figure 15 As shown, the fixed ring 21 is sleeved on the outer peripheral wall corresponding to the second annular step 11c and abuts against the second step surface 11c1 at its proximal end face. During the movement of the sliding ring 23 towards the proximal end, it can abut against the second step surface 11c1 at its proximal end face.

[0098] When the first driving tendon 51 is pulled proximally, the sliding ring 23 and the connecting ring 22 move proximally along the outer peripheral wall of the fixed ring 21 until the sliding ring 23 and the connecting ring 22 are as follows. Figure 11 As shown, the rings are stacked sequentially from the outside to the inside on the fixed ring 21. The proximal end face of the sliding ring 23 abuts against the second step surface 11c1 of the second annular step 11c. The proximal end face of the transmission ring 53 abuts against the side wall of the limiting groove 4c at the proximal end. The bracket component 3 is fully exposed.

[0099] Thus, not only can the second annular step 11c position the fixed ring 21 on the endoscope connector 1, improving installation accuracy and reliability, but the outer peripheral wall of the fixed ring 21 can also provide constraint and guidance for the movement of the sliding ring 23, making the movement of the sliding ring 23 more stable and reliable. The second annular step 11c can also provide a limit for the movement of the sliding ring 23, making the movement of the sliding ring 23 more precise and controllable, thereby making the exposure operation of the support component 3 more precise and controllable.

[0100] It is worth mentioning that the inner peripheral wall corresponding to the endoscope channel inside the endoscope connector 1 can be provided with a stop. Specifically, the endoscope channel can be as follows: Figure 15 The stepped aperture shown includes an inner aperture 11e and a stepped aperture 11f from the distal end to the proximal end. The stepped aperture 11f has a third stepped surface 11f1 facing the proximal end, which is used to provide positioning for the installation of the endoscope 7 to improve installation accuracy.

[0101] Furthermore, such as Figure 12 As shown, in this embodiment of the application, the outer wall of the guide tube 4 is provided with a first path groove 4b that extends along the length direction, and the outer peripheral wall of the connector body 11 is provided with two or more second path grooves 11d that extend axially on the side of the second step surface 11c1 near the proximal end. The distal end face of the guide tube 4 abuts against the proximal end face of the connector body 11, and one of the second path grooves 11d communicates with the first path groove 4b. Figure 15 As shown, the distal end of the second driving tendon 52 is fixed to the proximal end face of the sliding ring 23, as... Figure 2As shown, each of the second drive tendons 52 is respectively engaged in each of the second path grooves 11d, and the first drive tendon 51 and one of the second drive tendons 52 are respectively engaged in the first path groove 4b.

[0102] Thus, during the movement of the first driving tendon 51 proximally or distally, the first driving tendon 51 and one of the second driving tendons 52 are always engaged within the first path groove 4b, while each of the second driving tendons 52 is always engaged within its corresponding second path groove 11d. These two path grooves provide constraint and guidance for the corresponding driving tendons, making the movement of each driving tendon more stable and reliable. This, in turn, makes the process of the sliding sleeve 2 exposing and releasing the support component 3 more stable and reliable. Moreover, these structural designs also make the entire intragastric weight loss device more compact and more suitable for the human body cavity environment.

[0103] The drive component 6 is a component of the proximal manipulation sliding sleeve 2 of the endoscope 7 and the support component 3. In actual installation, its specific structure is not limited.

[0104] In the embodiments provided in this application, please refer to Figure 3 It is understood that the drive component 6 includes a drive handle 61 and a push-pull rod 62. The push-pull rod 62 is slidably disposed on the drive handle 61, and the proximal end of the first drive tendon 51 is connected to the push-pull rod 62. Pulling or pushing the push-pull rod 62 can pull or push the first drive tendon 51.

[0105] In use, the operator holds the drive handle 61 and pulls the push-pull rod 62 proximally to pull the first drive tendon 51, thereby controlling the exposure process of the stent component 3; pushing the push-pull rod 62 distally will push the first drive tendon 51, thereby controlling the release process of the stent component 3. In this way, the exposure and release of the stent component 3 can be controlled quickly and accurately, and the operation is relatively simple and convenient.

[0106] Please combine Figure 15 As previously described, a receiving chamber is formed between the outer wall of the endoscope connector 1 and the inner wall of the sliding sleeve 2 to accommodate the compressed stent component 3. Specifically, the receiving chamber can be annular. The connector body 11 can have a first annular step 11a on the outer peripheral wall of the distal end and on the side of the second annular step 11c near the distal end. The first annular step 11a has a first step surface 11a1 facing the distal end. The outer peripheral wall surface corresponding to the first annular step 11a forms the inner annular wall surface of the receiving chamber, and the first step surface 11a1 forms the proximal end face of the receiving chamber. The fixing ring 21, connecting ring 22, and sliding ring 23 are hollow cylindrical structures. Parts of the fixing ring 21 and connecting ring 22 can be sleeved and fixed to the outer peripheral wall corresponding to the second annular step 11c. The inner peripheral wall surface of the remaining part of the connecting ring 22 and the inner peripheral wall surface of the sliding ring 23 form the outer annular wall surface of the receiving chamber to compress and constrain the stent component 3 from the side, so that the stent component 3 will not be exposed from the side.

[0107] Furthermore, in the embodiments provided in this application, such as Figure 7 As shown, the sliding sleeve 2 also includes a stop portion 24. The stop portion 24 is located at the distal end of the sliding ring 23, as shown... Figure 2 As shown, the proximal end face of the stop portion 24 abuts against the distal end face of the endoscope connector 1. The stop portion 24 is made of a flexible material, and when the sliding ring 23 moves proximally, it can... Figure 4 The stop portion 24 is shown to move away from the distal end face of the endoscope connector 1.

[0108] It is easy to understand that the stop 24, sliding ring 23, connecting ring 22, and connector body 11 together form the aforementioned receiving chamber. The sliding ring 23 and connecting ring 22 can be used to laterally compress and constrain the support component 3, preventing it from being exposed laterally. The stop 24 constrains the support component 3 from the axial distal end, preventing it from being exposed axially. Thus, during the transport of the support component 3, the sliding sleeve 2 stores the support component 3 in the receiving chamber with high compression, ensuring smooth transport of the support component 3 in a preset shape. When it is necessary to expose the support component 3, the drive component 6 is manipulated to pull the first drive tendon 51 proximally, which in turn pulls the sliding ring 23 proximally, causing it to move axially along the endoscope connector 1 to apply tension to the stop 24. Since the stop 24 is made of a flexible material, it can deform under tension, as... Figure 4 The distal end face of the endoscope connector 1 shown is equivalent to the distal end of the sliding sleeve 2 being opened, which can ensure the smooth exposure of the stent component 3.

[0109] Thus, the structure of the sliding sleeve 2 is relatively simple and compact, which can effectively constrain the support component 3 when conveying the support component 3, and smoothly open the far end to expose the support component 3 when it is necessary to expose the support component 3.

[0110] The specific structure of the stop part 24 is not limited.

[0111] In the embodiments of this application, such as Figure 7 As shown, the stop portion 24 includes multiple stop pieces 241. Each stop piece 241 can be a fan-shaped ring, and the multiple stop pieces 241 can be distributed circumferentially along the sliding ring 23 and share a common center, meaning there is a gap between adjacent stop pieces 241, and each gap passes through the same center. Thus, when the sliding sleeve 2 moves towards the proximal end, each stop piece 241 opens outwards, allowing the entire stop portion 24 to open more smoothly and evenly, as... Figure 4 The sliding sleeve 2 is finally fitted onto the outside of the connecting ring 22 to expose the support component 3 more smoothly and stably; as the sliding sleeve 2 moves to the distal end, each stop piece 241 can push the support component 3 to the distal end, so that the entire stop part 24 can close more smoothly and evenly, and as shown Figure 6As shown, it is finally retracted to the outer side of the distal end face of the endoscope connector 1 to release the stent component 3 more smoothly and stably.

[0112] Furthermore, in this embodiment, the proximal end face of the stop portion 24 and the distal end face of the endoscope connector 1 can be connected by multiple fixing points. These fixing points are configured to break when the tensile force on the stop portion 24 exceeds a preset tensile force threshold, thereby causing the stop portion 24 to move away from the distal end face of the endoscope connector 1.

[0113] In use, the stop part 24 and the endoscope connector 1 are connected by the above-mentioned point connection method, which makes the connection more stable and can more effectively constrain the support component 3 inside the stop part 24. Moreover, it can form a weak stress area at the fixed point. When the first drive tendon 51 is pulled proximally and the tension applied to the stop part 24 by the sliding ring 23 exceeds the preset tension threshold, each fixed point can break smoothly, so that the stop part 24 can smoothly leave the distal end face of the endoscope connector 1 and move proximally with the sliding ring 23, which can expose the support component 3 more smoothly and stably.

[0114] It is worth noting that the fixing points connecting the stop portion 24 and the distal end face of the endoscope connector 1 can be evenly distributed on the connection surface to make the connection more stable. Furthermore, the fixing points can be welded points formed by laser welding or adhesive points formed by bonding; this application does not impose any limitations on this.

[0115] In specific configurations, the flexible material used for the stop portion 24 is not limited; for example, it can be silicone, which has high flexibility and is more easily deformed to facilitate separation from the distal end face of the contact. Similarly, the flexible material used for the connecting ring 22 and the sliding ring 23 is also not limited; silicone can also be used for smoother movement and overlapping. Furthermore, the material of the fixing ring 21 is not limited; for example, it can be made of rigid plastic.

[0116] In a specific configuration, the stop 24, sliding ring 23, and connecting ring 22 form the distal flexible portion of the sliding sleeve 2. The connection method between the distal flexible portion and the fixed ring 21 is not limited. For example, it can be connected by adhesive bonding, which not only provides a stable connection but also facilitates operation. Alternatively, it can be connected by a two-stage injection molding process. Specifically, the fixed ring 21 can be injection molded first using rigid plastic, and then the connecting ring 22, sliding ring 23, and stop 24 can be sequentially injection molded onto the distal end face of the fixed ring 21 using silicone material. This not only results in high molding efficiency but also produces a sliding sleeve 2 with higher dimensional accuracy and surface quality, making it more suitable for operation in human body cavity environments.

[0117] The support component 3 is the execution component placed in the gastrointestinal tract for weight loss. Its structural performance determines the safety and efficiency of the delivery and release process, as well as the weight loss effect.

[0118] Please refer to this as well. Figures 16 to 18 , Figure 16 for Figure 6 The diagram shows the structural design of the support component from another perspective. Figure 17 for Figure 16 Side view, Figure 18 for Figure 17 The DD-direction sectional view. Among them, Figure 18 The grid filling of the first support 31 and the second support 33 shown is not a pattern filling of the cross-section, but rather to show the mesh structure woven from shape memory alloy material.

[0119] In actual setup, the specific structure of bracket component 3 is not limited.

[0120] In the embodiments provided in this application, such as Figure 16 As shown, the stent component 3 includes a first stent 31, a valve cannula 32, a second stent 33, and a sheath cannula 34, which are sequentially fixed and connected from proximal to distal. Wherein, as... Figure 15 As shown, the support component 3 is fitted onto the outer peripheral wall of the endoscope connector 1. Figure 3 and Figure 13 As shown, the guide tube 4 has a first medium channel 4a, the drive component 6 has a second medium interface 63, and the first bracket 31 is connected through the first medium channel 4a and the second medium interface 63. Both the first bracket 31 and the second bracket 33 are made of shape memory alloy material.

[0121] It is easy to understand that both the first stent 31 and the second stent 33 can be made into a ring shape using shape memory alloy material. The valve tube 32 is a membrane tube formed by sequentially arranging multiple flexible membranes along the circumference of the stent component 3. The sheath tube 34 can be a circular membrane tube formed by flexible membranes. The first stent 31, valve tube 32, second stent 33, and sheath tube 34 can be arranged coaxially, and their internal channels are connected to form the food channel 3a of the stent component 3. The second medium interface 63 is used to connect a medium source, which can be gas or liquid, to fill the stent component 3 with a medium.

[0122] In use, once the stent component 3 is delivered to the appropriate position, the drive component 6 can be manipulated to expose the stent component 3 in stages: first, the sliding ring 23 is driven to move a certain distance proximally, exposing the sheath tube 34 and the second stent 33. The compressed second stent 33 will gradually recover its shape and unfold, supporting and fixing itself to the duodenal bulb for initial positioning, while the sheath tube 34 will initially extend within the duodenum; then, the sliding ring 23 is driven to continue moving proximally, exposing the valve tube 32 and the first stent 31. The compressed first stent 31 will gradually recover its shape and unfold at the pylorus, while the valve tube 32 will initially extend between the pylorus and the duodenal bulb.

[0123] A medium, such as gas, can be introduced through the second medium interface 63 on the drive component 6. The gas will enter the stent component 3 through the first medium channel 4a of the guide tube 4 on the outer wall of the endoscope 7, gradually blowing open the valve cannula 32 and the sheath cannula 34, as if... Figure 5 The diagram shows further extensions.

[0124] In such Figure 6 After the release of the stent component 3, the first stent 31 is fixed to the pylorus, further securing the stent component 3. The valve tube 32 generates slight resistance, slowing the flow of food from the stomach into the duodenum, thereby prolonging the time food remains in the stomach. In other words, it can delay gastric emptying to some extent and prolong the duration of satiety. Food sequentially passes through the first stent 31, the valve tube 32, and the second stent 33 into the cannula 34. Thus, within a certain length of the intestine, food only passes through the food passage 3a of the stent component 3, while bile and pancreatic juice are isolated outside the stent component 3. This causes bile and pancreatic juice to "divert" from food and converge distally, thus delaying the contact time between bile and pancreatic juice and food. This shortens the contact path and contact time between food and the intestine, thereby reducing the digestion and absorption of food by the intestinal wall.

[0125] In this way, the dual effects of the valve tube 32 delaying gastric emptying and the sheath tube 34 shortening the contact time between food and intestines can be utilized to greatly enhance the weight loss effect of the stent component 3, thereby achieving the goal of rapid weight loss.

[0126] Moreover, the movement of the sliding ring 23 can be controlled in stages by the driving component 6, so as to achieve the staged exposure of the stent component 3. The second stent 33 can be used for preliminary positioning in the duodenal bulb. This not only allows the valve tube 32 and the first stent 31 to be exposed after the sheath tube 34 and the second stent 33 are in place, thus achieving precise placement of the stent component 3, but also allows for further positioning at the pylorus after the first stent 31 is released, improving the stability of the stent component 3 and ensuring the smooth performance of the weight loss effect of the stent component 3.

[0127] Furthermore, by using the second media interface 63 of the driving component 6 and the first media channel 4a of the guide tube 4 to inject airflow into the stent component 3, the sheath tube 34 can extend more easily and faster, thereby further shortening the stent placement time and improving the efficiency of stent placement. Of course, the first stent 31, the valve tube 32, and the second stent 33 can assist in guiding the airflow injected through the driving component 6, which can not only further improve the extension speed of the sheath tube 34, but also ensure that the extension process of the sheath tube 34 is more stable.

[0128] Furthermore, compared to related technologies where the delivery of the bypass stent and the pneumatic extension of the membrane tube require separate operations using different instruments, necessitating frequent instrument changes during stent placement, this not only complicates the procedure and prolongs the stent placement time but also increases the risk of infection and perforation. The gastric weight loss device provided in this application integrates the mechanical drive transmission structure for the delivery and release of the stent component 3—the sliding sleeve 2, the first drive tendon 51, the transmission ring 53, the second drive tendon 52, and the push-pull rod 62—as well as the pneumatic drive structure for the extension of the membrane tube 34 in the stent component 3—the second media interface 63 and the guide tube 4—into the endoscope's transparent cap. During use, only the push-pull rod 62 on the proximal drive handle 61 is needed to release the stent component 3, and only the second media interface 63 on the drive handle 61 is needed to extend the membrane tube 34. No instrument changes are required, making the operation simpler, further shortening the operation time, and reducing safety risks.

[0129] Furthermore, the stent component 3 is fitted and compressed onto the outer peripheral wall of the endoscope connector 1, making it less likely for the various parts to become entangled during transport. The stent component 3 also has high controllability in shape during transport, exposure, and release, which is particularly beneficial for ensuring the shape of the stent component 3 after release, thereby ensuring the weight loss effect.

[0130] It is worth mentioning that the support component 3 can be exposed in stages as described above, or as... Figure 4 The exposure shown is a one-time event, and this application does not impose any restrictions on it.

[0131] The sheath tube 34 can be extended by introducing a medium through the second medium interface 63 and the first medium channel 4a as described above, or it can be extended by utilizing the flow of food in the stomach instead of the second medium interface 63 and the first medium channel 4a. This application does not impose any restrictions on this. The length of the sheath tube 34 can be set according to actual needs. For example, it can be extended to be located in the duodenum and upper jejunum.

[0132] The support component 3 can be sleeved and compressed onto the outer peripheral wall of the endoscope connector 1 as described above, or it can be compressed in other ways and forms. This application does not limit this.

[0133] In the drive component 6, the second medium interface 63 can be located on the drive handle 61 for convenient medium transport operation. The push-pull rod 62 can fine-tune the sliding speed of the sliding sleeve 2, thereby achieving more precise release control of each part of the bracket component 3.

[0134] Please combine Figure 12 and Figure 15Understandably, in this embodiment, the endoscope connector 1 further includes at least one first media interface 12. Specifically, the first media interface 12 is disposed on the first stepped surface 11a1, and the connector body 11 has at least one second media channel 11b on the side of the first stepped surface 11a1 near the proximal end. The compressed support component 3 is located on the side of the first stepped surface 11a1 near the distal end, the inlet end of the first media interface 12 is connected to the corresponding second media channel 11b, and the outlet end is inserted into the interior of the first support 31, as shown below. Figure 13 As shown, the distal end face of the guide tube 4 abuts against the proximal end face of the connector body 11, and the second medium channel 11b and the first medium channel 4a are connected.

[0135] In this way, the support component 3 is compressed on the outside of the endoscope connector 1, on the side of the first stepped surface 11a1 near the distal end. At the same time, its first support 31 is connected to the second media channel 11b of the endoscope connector 1 through the first media interface 12 provided on the first stepped surface 11a1. The second media channel 11b is connected to the first media channel 4a of the guide tube 4. In use, the media is fed into the first media channel 4a through the second media interface 63 on the drive handle 61, and then sequentially fed into the first support 31 through the second media channel 11b and the first media interface 12.

[0136] In this way, not only can the stability and smooth delivery of the medium be guaranteed, but the medium delivery channel is integrated by using the endoscope connector 1 and the guide tube 4. In addition, as mentioned above, the drive tendons are integrated by using the endoscope connector 1 and the guide tube 4, making the structure of the gastric weight loss device more compact.

[0137] In specific configuration, the number of first media interfaces 12 is unlimited; it can be one or more. For example, such as... Figure 15 As shown, the endoscope connector 1 is provided with two first media interfaces 12, and correspondingly, two second media channels 11b are provided. The two first media interfaces 12 are respectively connected to the two second media channels 11b. The two first media interfaces 12 are evenly spaced along the circumference of the connector body 11, so that the medium can enter the support component 3 more evenly, thereby allowing the sheath tube 34 to extend more evenly, quickly and stably.

[0138] Please combine Figure 4 and Figure 12 It is understood that in the embodiments provided in this application, the endoscope connector 1 further includes at least one constraint post 13. The constraint post 13 is disposed on the first stepped surface 11a1 and extends axially along the connector body 11. The compressed support component 3 is at least partially constrained on the inner side of the constraint post 13. The first media interface 12 and the constraint post 13 are distributed circumferentially at intervals in the connector body 11.

[0139] Thus, by cleverly utilizing the constraint post 13 on the first step surface 11a1 to constrain the stent component 3, in conjunction with the constraint effect of the sliding sleeve 2, a double locking of the stent component 3 is achieved. This not only makes the installation of the compressed stent component 3 within the receiving chamber more stable and easier, but also ensures that the stent component 3 is constrained at the distal end of the endoscope transparent cap during expansion. Especially during the staged exposure of the stent component 3, after the second stent 33, which is exposed first, expands and is fixed to the duodenal bulb, the first stent 31 remains stably constrained at the distal end of the endoscope transparent cap, making the exposure of the first stent 31 more controllable. Even after the first stent 31 is exposed and expands, it remains as... Figure 5 As shown, the stent is stably constrained at the distal end of the endoscope's transparent cap, making the release of the first stent 31 more controllable and the media filling operation more stable and effective. These features make the stent component 3 less prone to displacement during transport, exposure, expansion, and release, further improving the safety, accuracy, and efficiency of stent component 3 placement.

[0140] In specific settings, the number of constraint columns 13 is unlimited; there can be one or more. For example, as shown... Figure 12 As shown, there are two or more constraint columns 13. The two or more constraint columns 13 are evenly distributed along the circumference of the joint body 11 to uniformly constrain the support component 3 from the circumference and improve the constraint effect.

[0141] In specific configurations, the structures of the first support 31 and the second support 33 are not limited; for example, they can be configured as follows: Figure 16 The trumpet shape shown is to enhance the fixing effect.

[0142] In this embodiment, the outer peripheral walls of the first support 31 and the second support 33 are respectively provided with multiple rings of fixing spikes (not shown in the figure); the multiple rings of fixing spikes are arranged at intervals along the axial direction of the support component 3. The fixing spikes can be tiny sharp spikes, which can not only provide reliable anchoring force, but also have controllable penetration depth.

[0143] Compared to traditional gastric stents for weight loss, which are rigidly anchored to the gastrointestinal wall and prone to causing tissue erosion, the first stent 31 and the second stent 33 of this application, made of shape memory alloy, are fixed to the inner walls of the pylorus and duodenal bulb respectively by multiple rings of tiny spikes. This not only makes the stent component 3 more stable in the gastrointestinal tract, but also achieves flexible anchoring, which is less likely to damage the inner wall of the cavity, ensuring the continued weight loss effect after the stent component 3 is placed, and also ensuring the patient's personal safety.

[0144] The working principle of the intragastric weight loss device provided in this application embodiment is explained below with reference to the accompanying drawings:

[0145] In its initial state, the support component 3 is compressed within the receiving chamber of the endoscope transparent cap.

[0146] During installation, the endoscope connector 1 can be fitted onto the distal end of the endoscope 7, and the guide tube 4 and the endoscope 7 can be glued and fixed together with medical tape. The drive component 6 is located at the position of the operating handle 8 at the proximal end of the endoscope 7, thus completing the installation of the gastric weight loss device on the endoscope 7.

[0147] In use, during endoscopic examinations or treatments, or specifically for weight loss treatments, the main body of the gastric weight loss device—comprising the endoscope connector 1, sliding sleeve 2, and support component 3—along with the drive tendons 53, transmission rings 53, and guide tubes 4, enters the body cavity along with the endoscope 7. When the doctor observes that the main body of the gastric weight loss device has reached the appropriate position, the support component 3 is inserted.

[0148] Staged exposure of the stent component 3: The doctor holds the drive handle 61 and pulls the push-pull rod 62 proximally, causing the first drive tendon 51 to drive the sliding ring 23 proximally via the transmission ring 53 and each of the second drive tendons 52, which in turn drives the connecting ring 22 proximally. The fixing points between each stop plate 241 and the connector body 11 break, causing the stop part 24 to move proximally. The sliding ring 23 and the connecting ring 22 gradually overlap the outer peripheral wall of the fixing ring 21, exposing the sheath tube 34 and the second stent 33 first. The second stent 33 gradually recovers its deformation and unfolds, and is supported and fixed in the duodenal bulb by the tiny fixing thorns on its surface for initial positioning. The sheath tube 34 then initially extends in the duodenum. Subsequently, the control sliding ring 23 continues to move proximally, and finally the transmission ring 53 abuts against the side wall of the limiting groove 4c in the guide tube 4 near the proximal end. The sliding ring 23 and the connecting ring 22 are completely overlapped on the outer peripheral wall of the fixing ring 21, exposing the valve tube 32 and the first stent 31. The first stent 31 gradually recovers its deformation and unfolds at the pylorus, while the valve tube 32 initially extends between the pylorus and the duodenal bulb.

[0149] Injection of medium: The doctor injects gas into the first stent 31 through the second medium interface 63 on the drive handle 61. The gas enters the sheath tube 34 through the first stent 31, valve tube 32 and second stent 33, causing the sheath tube 34 to extend further in the intestine until it is fully deployed. The stent component 3 as a whole is still at the distal end of the endoscope transparent cap under the constraint of the restraint column 13.

[0150] Release stent component 3: After the sheath tube 34 is fully extended, the doctor pushes the push-pull rod 62 distally, causing the first drive tendon 51 to move the sliding ring 23 distally via the transmission ring 53 and each of the second drive tendons 52, thereby moving the stop part 24 distally, gradually pushing the expanded first stent 31 distally. Finally, the transmission ring 53 abuts against the side wall of the limiting groove 4c in the guide tube 4 near the distal end, and each stop piece 241... Figure 6As shown, the stent component 3 is gradually brought closer to the distal outer side of the endoscope connector 1, and is pushed away from the endoscope transparent cap. The first stent 31 is supported and fixed inside the pylorus by the tiny fixing spikes on its surface, thereby releasing the stent component 3 and completing the insertion of the stent component 3.

[0151] After the stent component 3 is released, the valve tube 32 can generate a slight resistance, slowing down the flow of food from the stomach to the duodenum, thereby prolonging the time that food stays in the stomach and thus prolonging the duration of satiety. After food enters the valve tube 32 through the first stent 31, it will enter the sheath tube 34 through the second stent 33. Within the length of the stent component 3, food only passes through the food channel 3a of the stent component 3, while bile and pancreatic juice are isolated outside the stent component 3, realizing the "diversion" of bile and pancreatic juice from food and their confluence at the distal end, thereby delaying and shortening the contact time between bile and pancreatic juice and food, thereby reducing the digestion and absorption of food by the intestinal wall.

[0152] In the above-mentioned placement process, the gastric weight loss device provided in this application embodiment uses the endoscope transparent cap to compress and store the stent component 3, and integrates the mechanical drive transmission structure for exposing and releasing the stent component 3 and the pneumatic drive structure for extending the sheath tube 34 in the stent component 3 into the endoscope transparent cap. After the stent component 3 is delivered in place, only the drive component 6 at the proximal end of the endoscope 7 needs to be operated to realize the extension of the sheath tube 34 and the release of the stent component 3. Moreover, only one person is needed to complete the above-mentioned placement process of the stent component 3. Not only is there no need to repeatedly operate the endoscope, but there is also no need to change instruments. The operation is relatively simple and convenient, which can greatly improve the efficiency of stent placement, shorten the stent placement surgery time, and reduce safety risks. In addition, the entire gastric weight loss device has a relatively compact structure and small size, which is beneficial for use in narrow human body cavity environments.

[0153] During the delivery of the stent component 3, since it is always stored inside the endoscope's transparent cap, the stent component 3 is not easily displaced due to gastrointestinal peristalsis or endoscopic operations. This can greatly improve the safety of the stent placement operation, relatively ensure the accuracy of stent placement, and improve the success rate of stent placement.

[0154] During the exposure of the stent component 3, the sliding ring 23 is moved in stages by manipulating the drive component 6 to achieve the staged exposure of the stent component 3. The second stent 33 can be used for preliminary positioning in the duodenal bulb. This not only allows the valve tube 32 and the first stent 31 to be exposed after the sheath tube 34 and the second stent 33 are in place, thus improving the placement accuracy of the stent component 3, but also helps to improve the stability of the stent component 3 after the first stent 31 is released and positioned at the pylorus, ensuring that the stent component 3 can successfully exert its weight loss effect.

[0155] After the sheath tube 34 is exposed, gas is introduced into the stent component 3 through the second medium interface 63 of the drive component 6, which makes the sheath tube 34 easier and faster to extend, further shortening the stent placement time and improving the efficiency of stent placement.

[0156] After the stent component 3 is released, the dual effects of the valve tube 32 delaying gastric emptying and the sheath tube 34 shortening the contact time between food and intestines can be utilized to greatly enhance the weight loss effect of the stent component 3, thereby achieving the goal of rapid weight loss for obese patients.

[0157] As can be seen, the above embodiments of this application provide a highly integrated, high-precision, and controllable release intragastric weight loss device, which can overcome the bottlenecks of related technologies, achieve efficient, accurate and safe placement of the stent component 3, and enable obese patients to lose weight efficiently and smoothly after the stent component 3 is placed.

[0158] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the apparatus and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A gastric weight-loss device that utilizes an endoscopic transparent cap to release a stent, characterized in that, It includes an endoscope transparent cap and a support component (3); the endoscope transparent cap includes an endoscope connector (1), a sliding sleeve (2), a guide tube (4) and a drive component (6); The sliding sleeve (2) includes a sliding ring (23), the endoscope connector (1) is used to fit the distal end of the endoscope (7), the sliding ring (23) is fitted on the endoscope connector (1), and the support component (3) is compressed on the outside of the endoscope connector (1) and the inside of the sliding sleeve (2). The guide tube (4) is located on the outer peripheral wall of the endoscope (7), the driving component (6) is located at the proximal end of the endoscope (7), and the endoscope connector (1) is connected to the guide tube (4) and the driving component (6). The sliding ring (23) is connected to the driving component (6) via a first driving tendon (51); the driving component (6) is configured to drive the sliding ring (23) to move proximally by pulling the first driving tendon (51) to expose the support component (3), and to drive the sliding ring (23) to move distally by pushing the first driving tendon (51) to push away from the support component (3); The sliding sleeve (2) also includes a fixing ring (21) and a connecting ring (22); The fixing ring (21) and the connecting ring (22) are both sleeved on the endoscope connector (1). The proximal end of the sliding ring (23) is connected to the fixing ring (21) through the connecting ring (22). The fixing ring (21) is fixed to the endoscope connector (1). The distal end of the first driving tendon (51) is connected to the proximal end of the sliding ring (23) and is located outside the connecting ring (22). Both the connecting ring (22) and the sliding ring (23) are made of flexible material. A receiving chamber is formed between the inner side of the sliding ring (23), at least part of the inner side of the connecting ring (22), and the outer side of the endoscope connector (1). The compressed support component (3) is located in the receiving chamber. When the sliding ring (23) moves toward the proximal end, it can drive the connecting ring (22) to move toward the proximal end and overlap with the connecting ring (22) on the outer peripheral wall of the fixed ring (21) to expose the bracket component (3). The stent component (3) includes a first stent (31), a valve cannula (32), a second stent (33), and a sheath cannula (34) that are fixed and connected sequentially from the proximal end to the distal end. The support component (3) is sleeved on the outer peripheral wall of the endoscope connector (1), the guide tube (4) has a first medium channel (4a), the drive component (6) has a second medium interface (63), the first support (31) is connected through the first medium channel (4a) and the second medium interface (63); the first support (31) and the second support (33) are both made of shape memory alloy material; The endoscope connector (1) includes a connector body (11) and at least one first media interface (12). The outer peripheral wall of the connector body (11) is provided with a first annular step (11a), the first annular step (11a) has a first step surface (11a1) facing the far end, the first medium interface (12) is provided on the first step surface (11a1), and the connector body (11) is provided with at least one second medium channel (11b) on the side of the first step surface (11a1) near the proximal end. The compressed support component (3) is located on the side of the first stepped surface (11a1) near the distal end. The inlet end of the first medium interface (12) is connected to the corresponding second medium channel (11b), and the outlet end is inserted into the interior of the first support (31). The distal end face of the guide tube (4) abuts against the proximal end face of the connector body (11). The second medium channel (11b) and the first medium channel (4a) are connected.

2. The intragastric weight loss device using an endoscopic transparent cap to release a stent according to claim 1, characterized in that, The gastric weight loss device that uses an endoscopic transparent cap to release a stent also includes a transmission ring (53) and two or more second drive tendons (52). The transmission ring (53) and the sliding ring (23) are coaxially arranged, and two or more second driving tendons (52) are evenly spaced along the circumference of the sliding ring (23). The proximal end of the sliding ring (23) is connected to the distal end of the transmission ring (53) through two or more second driving tendons (52), and the distal end of the first driving tendon (51) is fixed to the proximal end of the transmission ring (53). The outer wall of the guide tube (4) is provided with a limiting groove (4c) that extends through the width direction, and the transmission ring (53) is at least partially located in the limiting groove (4c). During the movement of the first drive tendon (51) towards the proximal or distal end, the transmission ring (53) can abut against the two side walls of the limiting groove (4c) respectively.

3. The intragastric weight loss device using an endoscopic transparent cap to release a stent according to claim 2, characterized in that, The endoscope connector (1) includes a connector body (11); the outer peripheral wall of the connector body (11) is provided with a second annular step (11c), the second annular step (11c) having a second step surface (11c1) facing the distal end; the fixing ring (21) is sleeved on the outer peripheral wall corresponding to the second annular step (11c) and abuts against the second step surface (11c1) at the proximal end face; the sliding ring (23) can abut against the second step surface (11c1) at the proximal end face during the movement towards the proximal end; and / or, The endoscope connector (1) includes a connector body (11); the outer peripheral wall of the connector body (11) is provided with a second annular step (11c), the second annular step (11c) having a second step surface (11c1) facing the distal end; the outer side wall of the guide tube (4) is provided with a first path groove (4b) extending along the length direction, the outer peripheral wall of the connector body (11) is provided with two or more second path grooves (11d) extending along the axial direction on the side of the second step surface (11c1) near the proximal end, the distal end face of the guide tube (4) abuts against the proximal end face of the connector body (11), one of the second path grooves (11d) and the first path groove (4b) are connected; the distal end of the second driving tendon (52) is fixed to the proximal end face of the sliding ring (23), each of the second driving tendons (52) is respectively engaged in each of the second path grooves (11d), the first driving tendon (51) and one of the second driving tendons (52) are respectively engaged in the first path groove (4b); and / or, The driving component (6) includes a driving handle (61) and a push-pull rod (62); the push-pull rod (62) is slidably disposed on the driving handle (61), and the proximal end of the first driving tendon (51) is connected to the push-pull rod (62). Pulling or pushing the push-pull rod (62) can pull or push the first driving tendon (51).

4. The intragastric weight loss device using an endoscopic transparent cap to release a stent according to any one of claims 1 to 3, characterized in that, The sliding sleeve (2) also includes a stop (24); The stop (24) is located at the distal end of the sliding ring (23), and the proximal end face of the stop (24) abuts against the distal end face of the endoscope connector (1). The stop (24) is made of flexible material. When the sliding ring (23) moves proximally, it can drive the stop (24) away from the distal end face of the endoscope connector (1).

5. The intragastric weight loss device using an endoscopic transparent cap to release a stent according to claim 4, characterized in that, The stop portion (24) includes a plurality of stop pieces (241); the stop pieces (241) are fan-shaped, and the plurality of stop pieces (241) are distributed at intervals along the circumference of the sliding ring (23) and share a common center; and / or, The proximal end face of the stop (24) and the distal end face of the endoscope connector (1) are connected by a plurality of fixing points; the fixing points are configured to break when the tension on the stop (24) exceeds a preset tension threshold, so that the stop (24) leaves the distal end face of the endoscope connector (1).

6. The intragastric weight loss device using an endoscopic transparent cap to release a stent according to any one of claims 1 to 3, characterized in that, The endoscope connector (1) also includes at least one constraint post (13). The constraint post (13) is disposed on the first step surface (11a1) and extends along the axial direction of the connector body (11). The compressed support component (3) is at least partially constrained to the inner side of the constraint post (13). The first medium interface (12) and the constraint post (13) are circumferentially spaced on the connector body (11).

7. The intragastric weight loss device using an endoscopic transparent cap to release a stent according to claim 6, characterized in that, There are two or more first media interfaces (12), and two or more second media channels (11b). Each of the two or more first media interfaces (12) is connected to one or more second media channels (11b). The two or more first media interfaces (12) are evenly spaced along the circumference of the connector body (11); and / or, There are two or more constraint posts (13), and the two or more constraint posts (13) are evenly spaced along the circumference of the joint body (11); and / or, The outer peripheral walls of the first bracket (31) and the second bracket (33) are respectively provided with multiple rings of fixing spikes; the multiple rings of fixing spikes are arranged at intervals along the axial direction of the bracket component (3).

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