Volume-adjustable intragastric weight reduction balloon

Abstract

The invention relates to the technical field of medical treatment, in particular to a volume-adjustable intragastric weight reduction balloon which comprises a multi-balloon double-layer balloon body, a separable repeated connection pipe assembly and an ascosac targeted destruction unit. The multi-balloon double-layer balloon body is formed by fixing a plurality of independent sub-balloons through flexible connecting strips, and each sub-balloon is provided with a double-layer membrane structure and an exclusive liquid injection / triggering channel; the connecting pipe assembly comprises a main pipe body, a tree-shaped branching device, a branch pipe and a double-sealing joint, and can be repeatedly sealed and butted; and the degradation liquid is injected in a targeted manner to destroy the outer membrane of the ascus, so that step-by-step volume reduction is The device can be implanted and taken out through a gastroscope without surgical operation, and the trauma is extremely small; volume adjustment accurately adapts to the patient adaptation period, and the rebound risk is reduced; connection and sealing are reliable, operation is convenient, safety is high, gastric mucosa can be effectively protected, and the actual requirement of clinical weight loss treatment is met.

Description

Technical Field

[0001] This invention relates to the field of medical technology, and more specifically, to an adjustable-volume intragastric weight-reduction balloon. Background Technology

[0002] With the increasing prominence of obesity-related health problems, the demand for weight loss treatment continues to grow. Currently, weight loss in China mainly relies on surgical gastrectomy, diet control combined with exercise, etc., while only Boston Scientific has launched a single-structure weight loss balloon product abroad. Surgical procedures have drawbacks such as large trauma, abdominal scarring, and long postoperative recovery periods, and also have high requirements for the patient's physical condition; the combination of diet and exercise relies on strong self-discipline, which most obese people find difficult to adhere to in the long term, resulting in limited weight loss effects. Existing foreign balloon products lack a progressively adjustable volume design, cannot adapt to the physiological needs of patients gradually adapting to reduced food intake, and their connection structure makes it difficult to achieve reliable sealing during repeated injection and drainage, resulting in insufficient flexibility in use. Therefore, there is an urgent need for a minimally invasive, progressively adjustable volume, stable connection and sealing, and easy-to-use intragastric weight loss balloon to overcome the many shortcomings of existing technologies and meet the actual needs of clinical weight loss treatment. Summary of the Invention

[0003] In view of this, the present invention addresses the shortcomings of the prior art by proposing an adjustable-volume intragastric weight-reduction balloon, aiming to solve at least one of the problems mentioned in the background art.

[0004] This invention provides an adjustable-volume intragastric weight-loss balloon, comprising: a multi-sac double-layer balloon body, consisting of at least 3 independent sub-sacs fixedly connected by connecting components, each sub-sac having a double-layer membrane structure and a dedicated trigger channel; A detachable repeatable connecting tube assembly, the connecting end of which is detachably and sealed to the dedicated trigger channel; The ascosac-targeting destruction unit degrades the outer membrane of the ascosac through a triggering medium.

[0005] In some embodiments, the plurality of sub-cysts are symmetrically distributed in a ring.

[0006] In some embodiments, the connecting component is a flexible connecting strip.

[0007] In some embodiments, the bilayer membrane structure includes an inner membrane and an outer membrane, the outer membrane covering the inner membrane, and a gap being provided between the outer membrane and the inner membrane.

[0008] In some embodiments, the outer membrane surface is provided with an annular degradation guiding groove.

[0009] In some embodiments, the separable repeatable connection assembly includes a main body, a tree-shaped splitter, branch pipes, and a double-sealed joint, wherein the splitter has one input terminal and multiple output terminals.

[0010] In some embodiments, the double-sealed joint includes a male joint and a female joint, the male joint having a built-in double-layer silicone self-sealing gasket, and the female joint having two sealing grooves on its inner wall.

[0011] In some embodiments, the dedicated trigger channel is made of PEEK material, with a spiral guide groove on the inner wall, and an annular reinforcing rib is provided at the connection between the outer membrane and the inner membrane.

[0012] In some embodiments, the branch pipe has a built-in one-way valve.

[0013] In some embodiments, the flexible connecting strip has a polyester fiber braided reinforcement layer inside.

[0014] Compared with existing technologies, the advantages of this invention are as follows: Minimal trauma, eliminating the need for surgical removal of the stomach; balloon implantation and removal can be completed via gastroscopy, requiring only a tiny subcutaneous incision, avoiding abdominal scarring and a long postoperative recovery period, thus addressing the pain point of large trauma in traditional surgery. Flexible and precise volume adjustment; the multi-sac structure combined with a dedicated trigger channel allows for gradual volume reduction, adapting to the patient's 1-8 month physiological adaptation cycle, helping to gradually cultivate healthy eating habits, significantly reducing the risk of weight rebound, and overcoming the deficiency of existing balloons that cannot be adjusted in stages. Reliable connection and sealing; the double-sealed connector and detachable design support ≥20 repeated injections and drainages without leakage risks, facilitating operation and reducing the workload of medical staff. High safety; the inner membrane is soft and corrosion-resistant, the outer membrane undergoes directional degradation without sharp residues, and the independent multi-sac design prevents overall failure, effectively protecting the gastric mucosa. In summary, this application combines the advantages of minimal trauma, strong controllability, and high safety, fully meeting the actual needs of clinical weight loss treatment, improving patient treatment compliance and weight loss effectiveness.

[0015] The above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0016] Other features and aspects of this disclosure will become clearer from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a frontal sectional view of the adjustable-volume intragastric weight-reduction balloon provided in an embodiment of the present invention.

[0019] The components include: 1. a daughter capsule; 2. a detachable and repeatable connecting tube assembly; 3. a dedicated trigger channel; and 4. a flexible connecting strip. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] See Figure 1 As shown, an adjustable-volume intragastric weight-loss balloon according to an embodiment of this application includes: The multi-cystic double-layered balloon body consists of at least 3 independent sub-capsules 1 fixedly connected by connecting components, and each sub-capsule 1 is provided with a double-layered membrane structure and a dedicated triggering channel 3; The detachable repeatable connecting tube assembly 2 has its connecting end detachably and sealedly connected to the dedicated trigger channel 3; The cyst-targeting destruction unit degrades the outer membrane of the cyst 1 by triggering a medium.

[0025] In some specific embodiments, the multiple sub-cysts 1 are symmetrically distributed in a ring.

[0026] It should be understood that at least three independent daughter sacs 1 are evenly arranged in a ring. After being implanted into the stomach and infused with fluid, the entire balloon takes on a near-spherical shape, which allows for balanced force distribution on the stomach wall and avoids discomfort or damage caused by localized pressure on the gastric mucosa from a single daughter sac 1. In the initial stage of weight loss, all the ring-shaped daughter sacs 1 inflate together, maximizing their occupation of the stomach contents and quickly suppressing appetite. When gradual reduction in volume is required, after each daughter sac 1 is destroyed, the remaining daughter sacs 1 still maintain a ring-shaped symmetrical structure, ensuring the overall stability of the balloon's center of gravity. This prevents displacement or tilting due to local volume changes, ensuring that the balloon always adapts to the physiological environment within the stomach and guaranteeing the continuity and safety of the weight loss process.

[0027] In some specific embodiments, the connecting component is a flexible connecting strip 4.

[0028] It should be understood that the flexible connecting strip 4 is key to achieving "endoscopic implantation and stable fixation in the body" of the balloon. Before implantation, the flexible connecting strip 4 can fold and contract together with the daughter balloons 1, ensuring that the overall diameter of the multi-sac double-layer balloon is ≤12mm, allowing it to pass smoothly through the endoscope channel into the stomach without the need for a surgical incision. After implantation, physiological saline is injected into the daughter balloons 1 to inflate them, and the flexible connecting strip 4 naturally unfolds, firmly connecting the individual daughter balloons 1 into a whole. At the same time, due to its flexible nature, it can undergo slight deformation with gastric peristalsis, avoiding friction or puncture to the stomach wall caused by the rigid connecting structure, ensuring the balloon's adaptability during its 8-month in-body use period.

[0029] In some specific embodiments, the double-layer membrane structure includes an inner membrane and an outer membrane, the outer membrane covering the inner membrane, and a gap being provided between the outer membrane and the inner membrane.

[0030] It should be understood that the two membranes have clearly defined functions and work together: the inner membrane, as the core cavity, is specifically for storing saline solution, and its soft, corrosion-resistant properties directly prevent damage to the gastric mucosa; the outer membrane, as a biodegradable functional layer, is responsible for reducing volume in response to triggering media. The gap between the outer and inner membranes serves two purposes: firstly, it prevents wear of the inner membrane from direct contact and friction during the expansion of the endometrium 1 or gastric peristalsis; secondly, it provides a buffer space for the degradation of the outer membrane, preventing fragments generated during degradation from adhering to the inner membrane. During operation, saline solution only fills the inner membrane, while the outer membrane completely covers it to form a sealed protection; when the degradation solution is injected, the outer membrane gradually hydrolyzes and degrades within the gap, while the inner membrane remains sealed and intact, eliminating the risk of saline solution leakage.

[0031] In some specific embodiments, the outer membrane surface is provided with an annular degradation guiding groove.

[0032] It should be understood that this groove provides a "directional path" for the degradation of the outer membrane. When the degradation solution is injected through the dedicated trigger channel 3, it will concentrate on wetting the outer membrane along the annular groove area. Because the outer membrane thickness at the groove is thinner than in other areas, and the groove can guide the degradation solution to be evenly distributed, avoiding localized accumulation or uneven diffusion, the outer membrane ruptures precisely and quickly along the groove trajectory. This design not only ensures that the saline solution in the daughter sac 1 can be smoothly discharged through the rupture opening, achieving precise volume reduction, but also avoids irregular damage to the outer membrane or the presence of sharp fragments, preventing scratches to the inner membrane or gastric mucosa, and improving the safety of the volume reduction process.

[0033] In some specific embodiments, the separable repeatable connection pipe assembly 2 includes a main body, a tree-shaped splitter, branch pipes, and a double-sealed joint. The splitter has one input terminal and multiple output terminals.

[0034] It should be understood that the component achieves precise fluid transfer and control through a "master-distribution" structure. During operation, the main body serves as the main fluid channel, with one end connected to a syringe via a female connector and the other end connected to one input of a tree-shaped distributor. The multiple outputs of the tree-shaped distributor are connected to branch tubes of the corresponding daughter sacs 1, forming an operational logic of "one syringe controlling multiple daughter sacs 1". During the injection phase, physiological saline enters the main body through the female connector and then flows into the tree-shaped distributor. Through the distributor's diversion function, it is injected into the corresponding daughter sac 1 via the target branch tube, completing the filling process. During the reduction phase, the degradation solution enters through the same main body, is precisely diverted to the designated branch tube by the distributor, and finally delivered to the inner side of the outer membrane of the target daughter sac 1. This allows for independent control of multiple daughter sacs 1 without changing the tubing, perfectly meeting the clinical needs of repeated injection and drainage.

[0035] In some specific embodiments, the double-sealed joint includes a male joint and a female joint, the male joint having a built-in double-layer silicone self-sealing gasket, and the female joint having two sealing grooves on its inner wall.

[0036] It should be understood that the connector ensures the reliability of "reusable sealing docking" through a double-sealing structure. During operation, the male connector precisely docks with the dedicated trigger channel 3, and the female connector is tightly connected to the syringe, with both secured by a locking structure. The male connector's built-in double-layer silicone self-sealing gasket opens and closes at the center cross-shaped incision during syringe insertion and removal, and automatically closes after removal, achieving the first layer of sealing. The two sealing grooves on the inner wall of the female connector are respectively fitted with O-rings and lip rings, forming a second layer of sealing protection. This double structure effectively prevents liquid leakage. This design supports ≥20 repeated insertions and removals, meeting the needs of multiple injections and volume reduction operations after implantation, while maintaining the seal of the dedicated trigger channel 3 after removal, preventing gastric acid from entering the channel or saline solution from leaking out of the daughter capsule 1.

[0037] Female connector: Located at the end of the main body furthest from the splitter (closer to the doctor's operating end), it is the dedicated interface for connecting the component to the syringe. Its core function is to establish a sealed connection between the syringe and the main body. The inner wall has two sealing grooves, each fitted with an O-ring and a lip ring, forming a double seal to effectively block liquid leakage. Combined with a locking mechanism, it allows for quick insertion and removal from the syringe. In terms of connection method, the female connector and the main body are either integrally molded or threaded. When connecting the syringe, a tapered fit (1:15 taper) enhances the fit, ensuring stable pressure and no liquid leakage during injection. It supports ≥20 repeated insertions and removals.

[0038] Main tube: Located between the female connector and the tree-shaped splitter, it serves as the main channel for fluid transmission and is made of medical tubing resistant to gastric acid corrosion. Its function is to stably deliver the fluid (physiological saline / degradable solution) injected by the syringe to the splitter, providing a unified path for subsequent branching and avoiding a chaotic distribution of multiple tubing lines. The connection method involves one end being fixedly connected to the female connector, and the other end being threaded and locked to the input end of the tree-shaped splitter. A wave spring washer is added at the connection point to further enhance the sealing effect, preventing fluid leakage at the main channel and branching nodes, while also ensuring the overall structural strength of the tubing to withstand the pulling forces during clinical operations.

[0039] Tree-shaped distributor: Located between the main body and the branch tubes, this is the core diversion component that achieves "unified input, individual output," and is injection molded from medical-grade ABS plastic. It has one input end, which connects to the main body, and at least three output ends, matching the number of daughter capsules (1 in total), each connecting to a branch tube. Its function is to precisely divert the liquid from the main body to the dedicated tubing of the target daughter capsule (1 in total), realizing the operational logic of "one syringe controlling multiple daughter capsules." In terms of connection, the input end is locked to the external thread of the main body via an internal thread, and the output ends connect to each branch tube via external threads or interference fits. Each output end has an identification groove corresponding to the numerical markings on the branch tubes to avoid tubing confusion. This structure ensures uniform liquid distribution, good isolation between output ends, and no risk of cross-contamination. Furthermore, the inner wall of the flow channel features a smooth, rounded transition and is coated with a PTFE coating to reduce liquid flow resistance and residue.

[0040] Branch tubing: Located between the tree-shaped splitter and the male connector, this is a dedicated transmission line connecting the splitter to the target sac 1. It is made of medical-grade silicone tubing with a Shore A hardness of A25-30 and a length of 4-6cm. Its function is to precisely deliver the fluid diverted by the splitter to the dedicated trigger channel 3 of the corresponding sac 1. The outer wall is equipped with spiral reinforcing ribs (height 0.3-0.5mm, pitch 5-8mm) to enhance the tubing's compressive and tensile strength, preventing blockage due to gastric peristalsis or bending during operation. The connection method involves fixing one end to the splitter's output end and the other end being integrally molded with the male connector. It contains a built-in one-way valve (including an annular valve seat, a ball valve core, and a return spring). The one-way valve opening pressure is 0.04-0.06MPa. When fluid is injected, the pressure overcomes the spring force to open the valve core. After injection, the valve core automatically returns to its original position and closes, effectively preventing fluid backflow to the splitter or other branch tubing and ensuring independent control precision for each sac 1.

[0041] Male connector: As the adapter end of the double-sealed connector, it is located at the end of the branch tube furthest from the splitter (closer to the balloon body end) and is the core component for docking the assembly with the dedicated trigger channel 3. Its function is to achieve a detachable, sealed connection between the branch tube and the dedicated trigger channel 3. It has built-in double-layer silicone self-sealing gaskets (upper layer Shore A20, lower layer Shore A15), each with a cross-shaped cut in the center. The two cuts are staggered at 90°, allowing for free opening and closing during insertion and removal. After tube removal, it automatically closes to seal, preventing gastric acid from entering the channel or leakage of fluid from the daughter balloon 1. In terms of connection, the male connector is fixedly connected to the branch tube. During docking, it is inserted into the exposed end of the dedicated trigger channel 3 and locked in place by the locking threads on the outer wall. The double self-sealing gaskets fit tightly against the inner wall of the channel, forming a "mechanical locking + double sealing" protective structure, ensuring no leakage at the docking point, while supporting repeated disassembly and assembly without affecting the sealing performance.

[0042] The components are sequentially connected in the order of "female connector → main body → tree-shaped distributor → branch tube → male connector" to form a complete liquid transfer channel. The female connector receives the liquid input from the syringe, which is then delivered to the tree-shaped distributor via the main body. The distributor diverts the liquid to designated branch tubes according to operational requirements. The branch tubes ensure unidirectional liquid transfer through one-way valves. Finally, the male connector seals and connects with the dedicated trigger channel 3 to accurately deliver the liquid to the target capsule 1. In the entire connection structure, each node is equipped with sealing components (sealing gaskets, sealing rings, self-sealing gaskets, etc.), which, together with threaded locking or interference fit fixing methods, achieve both the function of being separable and reusable and ensure the sealing and accuracy of liquid transfer, fully adapting to the needs of multiple operations such as injection and volume reduction in clinical practice.

[0043] In some specific embodiments, the dedicated trigger channel 3 is made of PEEK material, with a spiral guide groove on the inner wall, and an annular reinforcing rib is provided at the connection between the outer membrane and the inner membrane.

[0044] It should be understood that the channel, as a "dedicated conduit" for fluid delivery, is adapted to the harsh environment of the stomach. PEEK material possesses excellent resistance to gastric acid corrosion and structural strength, ensuring that the channel remains undegraded and undeformed even after long-term placement within the stomach. The spiral-shaped flow channels on the inner wall of the channel guide the injected saline or degradation solution to flow evenly along the channels, preventing excessively rapid local flow from impacting the membrane of the ovary 1 and reducing the risk of damage. The annular reinforcing ribs at the connection between the channel and the inner membrane disperse the tension generated when the ovary 1 fills and the pulling force from gastric peristalsis, preventing the channel from detaching from the inner membrane and ensuring the stability of the structural connection. During operation, fluid is precisely delivered through this channel to the interior of the ovary 1 or the inner side of the outer membrane, ensuring smooth fluid transfer and enhancing the overall structural durability.

[0045] The inner wall of channel 3 is provided with a spiral guide groove. When the separable reusable connecting tube assembly 2 delivers liquid (physiological saline / degradable solution), the guide groove can guide the liquid to flow spirally along the inner wall of the channel, avoiding direct impact of the liquid on the inner or outer membrane of the cyst 1, reducing membrane damage caused by local pressure concentration, and ensuring that the liquid is evenly distributed to the target area (flowing into the inner membrane cavity during injection, and flowing to the inner side of the outer membrane during volume reduction). A ring-shaped reinforcing rib is provided at the connection between channel 3 and the inner membrane of cyst 1. This reinforcing rib is integrally formed with the inner membrane and can disperse the radial tension generated when cyst 1 is filled with liquid, as well as the gastric... The pulling force generated by peristalsis prevents channel 3 from detaching from the inner membrane, ensuring the stability of the structural connection after long-term implantation and avoiding liquid leakage. The inner wall of the exposed end of channel 3 is precision-machined to form a smooth sealing surface and has a reserved annular positioning step, which not only provides accurate positioning for docking with the separable and reusable connecting tube assembly 2, but also enhances the sealing fit after docking. At the same time, the channel 3 itself is made of PEEK material, which can resist the corrosion of gastric acid with pH 1-3 in the stomach. It will not degrade or deform after long-term placement, ensuring unobstructed flow inside the channel and avoiding internal contamination or structural failure caused by gastric acid intrusion.

[0046] Preparation before connection: After the multi-cystic double-layer balloon is implanted into the stomach via gastroscopy, the exposed ends of the dedicated trigger channel 3 are concentrated in the subcutaneous micro-interface area (incision ≤ 0.5cm). The outer wall of the exposed end of channel 3 has external threads, and the inner wall has an annular positioning step. The port is smooth and burr-free, providing a structural basis for docking. The branch tube end of the separable repeatable connection tube assembly 2 is fixedly connected to the male connector. The male connector has a built-in double-layer silicone self-sealing gasket, and the outer wall has a locking thread that matches the external threads of channel 3. Before docking, it is necessary to ensure that the male connector and the port of channel 3 are free of contaminants.

[0047] Docking procedure: The doctor first aligns the male connector of the separable reusable connector assembly 2 with the exposed end of the dedicated trigger channel 3, and inserts it along the annular positioning step (the positioning step limits the insertion depth and prevents the male connector from being over-inserted and damaging the channel 3 or the membrane layer of the ovary 1). After insertion, the locking nut of the male connector is rotated so that the threads on the outer wall of the male connector are tightly engaged with the external threads of the channel 3, achieving mechanical locking and fixation. At this time, the double-layer silicone self-sealing gasket built into the male connector (the two layers of cuts are staggered at 90°) is tightly attached to the inner wall of the channel 3. After being squeezed, the self-sealing gasket fills the tiny gap between the channel 3 and the male connector, forming the first sealing barrier. At the same time, the threaded engagement surfaces of the male connector and the channel 3 are pressed together due to pressure, forming the second sealing barrier. The double sealing ensures that there is no liquid leakage at the docking point.

[0048] Liquid transport coordination: After connection, the branch tube of the separable repeatable connection tube assembly 2 forms a complete liquid channel with the channel 3 through the male connector. The physiological saline injected by the syringe flows through the main body, tree-shaped splitter, branch tube, male connector, and then flows into the inner membrane cavity of the cyst 1 through the spiral guide groove of the channel 3, completing the filling of the cyst 1. During volume reduction, the degradation solution is transported to the inner side of the outer membrane of the cyst 1 through the same channel 3, triggering the degradation of the outer membrane. Throughout the transport process, the spiral guide groove of the channel 3 guides the liquid to flow evenly, and the one-way valve built into the branch tube prevents the liquid from flowing back, ensuring that the liquid only acts in the target cyst 1.

[0049] Separation and Repeated Connection: After a single injection or volume reduction operation is completed, the doctor rotates the locking nut of the male connector in the opposite direction to loosen the thread engagement and pull the male connector out of the dedicated trigger channel 3. At this time, since the male connector is pulled out, the port of channel 3 has no additional sealing structure. However, the double-layer silicone self-sealing gasket of the male connector automatically closes at the moment of withdrawal. Combined with the smooth surface of the inner wall of channel 3, it can temporarily maintain the internal seal of channel 3, preventing gastric acid from entering the channel or the leakage of fluid from the daughter capsule 1. If subsequent injection or volume reduction is required, the above docking steps can be repeated. The thread structure of channel 3 and the sealing component of the male connector support ≥20 repeated insertions and removals without any decrease in sealing performance, which is fully adapted to the needs of multiple clinical operations.

[0050] In some specific embodiments, the branch pipe has a built-in one-way valve.

[0051] It should be understood that when the syringe injects liquid (physiological saline or degradation solution) into the branch tube, the liquid pressure overcomes the opening pressure of the one-way valve (0.04-0.06 MPa), pushing the ball valve core to open, allowing the liquid to flow smoothly to the target cyst 1. After injection, the valve core automatically closes under the action of the return spring, completely blocking the backflow path of the liquid. This design prevents the injected liquid from flowing back to the tree-shaped distributor or other branch tubes, prevents cross-contamination between different cysts 1, ensures that each injection or degradation operation only acts on the target cyst 1, guarantees the accuracy of stepwise volume reduction, and avoids misoperation affecting the weight reduction effect.

[0052] In some specific embodiments, the flexible connecting strip 4 has a polyester fiber woven reinforcement layer inside.

[0053] It should be understood that the reinforcing layer significantly improves the tensile strength while maintaining the flexibility of the connecting strip. During operation, the daughter balloon 1 generates outward tension after being filled with fluid, and the peristalsis of the stomach also exerts a continuous pulling force on the flexible connecting strip 4. The polyester fiber woven reinforcing layer can effectively disperse these stresses, preventing the daughter balloon 1 from falling off or shifting due to the breakage of the flexible connecting strip 4. At the same time, the reinforcing layer does not affect the folding performance of the flexible connecting strip 4, and it can still shrink to ≤12mm along with the daughter balloon 1 during implantation, smoothly passing through the gastroscopy channel. This achieves the dual effect of "flexible adaptation to the gastric environment + high-strength support structure", ensuring the structural integrity of the balloon during long-term use in the body.

[0054] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An adjustable-volume intragastric weight-loss balloon, characterized in that, include: A multi-cystic double-layered spherical body, consisting of at least 3 independent subcapsules fixedly connected by connecting components, each subcapsule having a double-layered membrane structure and a dedicated triggering channel; A detachable repeatable connecting tube assembly, the connecting end of which is detachably and sealed to the dedicated trigger channel; The ascosac-targeting destruction unit degrades the outer membrane of the ascosac through a triggering medium.

2. The adjustable-volume intragastric weight-loss balloon according to claim 1, characterized in that, The multiple subcapsules are symmetrically distributed in a ring.

3. The adjustable-volume intragastric weight-loss balloon according to claim 2, characterized in that, The connecting component is a flexible connecting strip.

4. The adjustable-volume intragastric weight-loss balloon according to claim 3, characterized in that, The double-layer membrane structure includes an inner membrane and an outer membrane, the outer membrane covering the inner membrane, and a gap being provided between the outer membrane and the inner membrane.

5. The adjustable-volume intragastric weight-loss balloon according to claim 4, characterized in that, The outer membrane surface is provided with an annular degradation guiding groove.

6. The adjustable-volume intragastric weight-loss balloon according to claim 5, characterized in that, The separable repeatable connection pipe assembly includes a main pipe, a tree-shaped splitter, branch pipes, and a double-sealed joint. The splitter has one input terminal and multiple output terminals.

7. The adjustable-volume intragastric weight-loss balloon according to claim 6, characterized in that, The double-sealed joint includes a male joint and a female joint. The male joint has a built-in double-layer silicone self-sealing gasket, and the inner wall of the female joint has two sealing grooves.

8. The adjustable-volume intragastric weight-loss balloon according to claim 7, characterized in that, The dedicated trigger channel is made of PEEK material, with a spiral guide groove on the inner wall, and an annular reinforcing rib at the connection between the outer membrane and the inner membrane.

9. The adjustable-volume intragastric weight-loss balloon according to claim 8, characterized in that, The branch pipe has a built-in one-way valve.

10. An adjustable-volume intragastric weight-loss balloon according to claim 9, characterized in that, The flexible connecting strip has a polyester fiber braided reinforcement layer inside.

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