Unlocking and releasing system of gastric bypass stent and gastric bypass stent system

Abstract

The invention discloses an unlocking and releasing system of a gastric bypass stent and a gastric bypass stent system, and relates to the technical field of medical instruments. According to the structure, the connecting hose is directly used for pushing the release ball, the center of the connecting hose and the center of the release ball are located on the same straight line, the pushing process is safer, and the risk of harm to the human body is reduced; besides, the center of the connecting hose and the center of the release ball are on the same straight line, and the connecting hose is not internally provided with other structures or materials, so that the guide wire can directly pass through an inner cavity of the connecting hose, the center guide function of the release ball is realized, and the release ball can enter a scotodoor more conveniently and quickly; and the operation convenience of the gastric bypass stent in the implantation process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an unlocking and releasing system of a gastric bypass stent and a gastric bypass stent system. Background Art

[0002] According to the "Guidelines for the Diagnosis and Treatment of Obesity (2024 Edition)" issued by the National Health Commission, the prevalence of obesity among adults in my country has reached 16.4%. With the enrichment of my country's economy and people's diet, obesity has gradually developed into a public health problem that threatens people's health. Existing treatment methods mainly include diet, exercise and behavioral intervention, drug therapy, endoscopic bariatric and metabolic therapy (EBMT), and surgical treatment. As a non-surgical weight loss method, EBMT has shown excellent efficacy in the field of weight loss and has been recognized by the American Society of Gastrointestinal Endoscopy (ASGE) and the European Society of Gastrointestinal Endoscopy (ESGE).

[0003] Among them, the gastric bypass stent system (duodenal jejunal internal cannula) inserts a membranous cannula into the duodenum and upper jejunum through endoscopy to isolate the chyme from the intestinal mucosa, interfere with the hormone signals related to insulin resistance, and affect the digestion and absorption of food, thereby achieving the purpose of treating obesity and obesity-related complications. The principle of this technology is similar to surgical gastric bypass surgery, but it is performed through gastroscopy without surgery. It has the advantages of minimally invasive, easy operation, no damage to the human body structure, easy removal and repeatable placement, and has good application prospects.

[0004] There are also related technologies for duodenal jejunal internal cannulae abroad, but they usually require multiple release lines to assist in the operation, which greatly increases the difficulty of the operation. Once an operation error occurs, it will increase the risk of patient discomfort and injury to the human body.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The object of the present invention is to provide an unlocking and releasing system for a gastric bypass stent and a gastric bypass stent system.

[0007] The present invention is achieved in that:

[0008] In a first aspect, the present invention provides an unlocking and releasing system for a gastric bypass stent, comprising a stent releasing unit, a connecting hose and an operating unit, wherein both ends of the connecting hose are respectively connected to the stent releasing unit and the operating unit.

[0009] The stent release unit includes a release ball, a storage tube and an elastic positioning piece. The storage tube is configured to selectively accommodate the membrane tube stent. The release ball is gap-fitted with one end of the storage tube. A positioning cavity for accommodating the elastic positioning piece is provided in the release ball. The connecting hose passes through the storage tube and is accommodated in the release ball. The elastic positioning piece is sleeved on the surface of the connecting hose near one end of the release ball, and the elastic positioning piece is a mesh structure with a selectively changeable diameter so that the elastic positioning piece can be selectively positioned in the positioning cavity. The operating unit is configured to control the diameter change of the elastic positioning piece.

[0010] In an optional embodiment, the positioning cavity includes an opening and an inner cavity, and the connection between the opening and the inner cavity is a positioning portion; the release ball has an opening at one end close to the storage tube, and the opening is connected to the inner cavity, and the elastic positioning piece is accommodated in the inner cavity of the release ball; when the diameter of the elastic positioning piece increases, the elastic positioning piece contacts and positions the positioning portion.

[0011] Preferably, the connecting hose includes a connecting inner tube and a connecting outer tube, the connecting outer tube is sleeved on the surface of the connecting inner tube, one end of the elastic positioning piece is fixed to the connecting outer tube, and the other opposite end is fixed to the connecting inner tube, and the operating unit is configured to control the connecting inner tube and the connecting outer tube to selectively move relative to each other, so that the elastic positioning piece can selectively block the open end of the inner cavity.

[0012] Preferably, the elastic positioning member is a three-dimensional woven mesh structure.

[0013] Preferably, the elastic positioning member is a three-dimensional mesh structure that can be selectively compressed into a disc shape.

[0014] Preferably, the elastic positioning member is made of nickel-titanium alloy.

[0015] In an optional embodiment, the operating unit includes a first control component, and the first control component is configured to control the change in diameter of the elastic positioning member.

[0016] The first control component includes an outer tube connection handle and an inner tube connection handle which can be selectively spaced apart. The outer tube connection handle is fixed to an end of the outer tube connection away from the release ball, the inner tube connection handle is fixed to an end of the inner tube connection away from the release ball, and the inner tube connection can selectively extend from the outer tube connection at the end of the connecting hose away from the release ball.

[0017] In an optional embodiment, the first control assembly further includes a locking member, which can be selectively sleeved on the surface of the inner tube connected between the outer tube handle and the inner tube handle.

[0018] Preferably, when the elastic positioning piece is in contact with the positioning portion for positioning, the locking piece is sleeved on the surface of the connecting inner tube.

[0019] Preferably, the locking member is a C-shaped open ring.

[0020] In an optional embodiment, the operating unit also includes a handle, a fixed knob and a handle which are sequentially sleeved on the surface of the connecting hose along the direction from the first control component to the bracket release unit, the fixed knob is connected to the handle, and the handle and the fixed knob can be selectively spaced apart.

[0021] In an optional embodiment, silicone positioning pieces are provided on both sides of the channel inside the fixed knob, and the silicone positioning pieces and the connecting outer tube can be selectively squeezed and positioned.

[0022] In an optional embodiment, one end of the elastic positioning member away from the operating unit is fixed to the connecting inner tube, and one end of the elastic positioning member close to the operating unit is fixed to the connecting outer tube.

[0023] In an optional embodiment, the support release unit further includes a connecting piece, which is connected to an end of the receiving tube away from the release ball.

[0024] In an optional embodiment, a receiving groove is provided at one end of the release ball away from the receiving tube, and the connecting hose can be selectively received in the receiving groove.

[0025] In a second aspect, the present invention provides a gastric bypass stent system, comprising a membrane tube stent and a system as described in any one of the aforementioned embodiments, wherein the membrane tube stent can be selectively accommodated in a receiving tube.

[0026] The present invention has the following beneficial effects:

[0027] The present invention provides an unlocking and releasing system of a gastric bypass stent and a gastric bypass stent system. By improving the structure of a connecting hose, an elastic positioning piece is sleeved on the outer surface of the connecting hose, and an operating unit controls the diameter of the elastic positioning piece to become larger or smaller. When the diameter of the elastic positioning piece is the largest, the elastic positioning piece contacts and positions the positioning part of the release ball, restricting the position of the release ball and the storage tube, and preventing the membrane tube stent from falling out in advance; when the diameter of the elastic positioning piece is the smallest, the mesh structure of the elastic positioning piece can be stretched to form a columnar structure, the positioning function of the elastic positioning piece is released, the release ball is released, and the membrane tube stent is driven to unfold, thereby realizing the insertion of the membrane tube stent. This structure directly uses a connecting hose to push the release ball. The centers of the connecting hose and the release ball are in a straight line, which makes the pushing process safer and reduces the risk of injury to the human body. In addition, since the centers of the connecting hose and the release ball are in a straight line and no other structures or materials are installed in the connecting hose, the guide wire can directly pass through the inner cavity of the connecting hose, thereby realizing the center guiding function of the release ball. The release ball can enter the pyloric opening more conveniently and quickly, thereby improving the operational convenience of the gastric diversion stent during the implantation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic structural diagram of an unlocking and releasing system for a gastric bypass stent provided in an embodiment of the present invention;

[0030] Figure 2 A structural cross-sectional view of an unlocking and releasing system of a gastric bypass stent provided by an embodiment of the present invention;

[0031] Figure 3 for Figure 2 A magnified view of the structure in the middle;

[0032] Figure 4 It is an enlarged view of structure A during the release process of the release ball;

[0033] Figure 5 A schematic structural diagram of the elastic positioning member in a compressed state provided by an embodiment of the present invention;

[0034] Figure 6 A schematic structural diagram of the elastic positioning member in a stretched state provided by an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of the structure of the first control assembly provided by an embodiment of the present invention when the elastic positioning member is in a compressed state;

[0036] Figure 8 A schematic diagram of the structure of the first control assembly provided by an embodiment of the present invention when the elastic positioning member is in a stretched state;

[0037] Fig. 9 A structural cross-sectional view of a handle and a fixed knob provided in an embodiment of the present invention.

[0038] Explanation of the main component symbols: 100-unlocking release system; 110-release ball; 111-opening; 112-inner cavity; 113-positioning part; 114-accommodating groove; 120-storage tube; 130-elastic positioning member; 140-connecting member; 150-first control component; 151-connecting outer tube handle; 152-connecting inner tube handle; 153-locking member; 160-handle; 170-fixing knob; 171-silicone positioning member; 180-handle; 190-connecting hose; 191-connecting inner tube; 192-connecting outer tube. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Please refer to Figure 1 and Figure 2The present embodiment provides an unlocking and releasing system 100 for a gastric bypass stent, comprising a stent releasing unit, a connecting hose 190 and an operating unit, wherein both ends of the connecting hose 190 are respectively connected to the stent releasing unit and the operating unit.

[0046] The unlocking and releasing system 100 is a key structure that assists the gastric bypass stent to enter the corresponding position in the body and release the membrane tube stent. The function of the stent release unit is to accommodate the membrane tube stent during the implantation of the membrane tube stent to prevent the membrane tube stent from coming out prematurely. After the membrane tube stent is implanted in place, the stent release unit releases the membrane tube stent into the body. The operating unit is connected to the stent release unit through a connecting hose 190, and controls the control process of the stent release unit on the membrane tube stent by controlling the connecting hose 190.

[0047] Please refer to Figure 3 The support release unit includes a release ball 110 , a storage tube 120 and an elastic positioning member 130 .

[0048] The storage tube 120 is configured to selectively accommodate the membrane tube stent. When the membrane tube stent is in the delivery state, the membrane tube stent is accommodated in the storage tube 120; after the membrane tube stent is delivered to the right place, the membrane tube stent can be removed from the storage tube 120 with the cooperation of the release ball 110 and other structures and placed in the body.

[0049] Please refer to Figure 4 The release ball 110 is fitted with a gap at one end of the storage tube 120 so that the release ball 110 can be separated from the storage tube 120, making it easier for the membrane tube support to escape from the storage tube 120, and the release ball 110 can also drive the membrane tube support to unfold after escaping from the storage tube 120.

[0050] Please refer to Figure 3 and Figure 4 , a positioning cavity for accommodating an elastic positioning member 130 is provided in the release ball 110, and the positioning cavity includes an opening 111 and an inner cavity 112, and the connection between the opening 111 and the inner cavity 112 is a positioning portion 113. The release ball 110 has an opening 111 at one end close to the storage tube 120, and the inner cavity 112 is provided in the release ball 110, the opening 111 is communicated with the inner cavity 112, and a positioning portion 113 is provided at the connection between the opening 111 and the inner cavity 112; the connection hose 190 passes through the storage tube 120 and is accommodated in the release ball 110, the elastic positioning member 130 is sleeved on the surface of the connection hose 190, and the elastic positioning member 130 is accommodated in the inner cavity 112 of the release ball 110, and the elastic positioning member 130 is a mesh structure with a selectively changeable diameter, so that the elastic positioning member 130 and the positioning portion 113 can be selectively positioned.

[0051] The connecting hose 190 passes through the storage tube 120 and cooperates with the positioning part 113 in the release ball 110 through the elastic positioning member 130, thereby realizing a controllable connection between the storage tube 120 and the release ball 110. Since the connecting hose 190 passes through the storage tube 120 and is contained in the release ball 110, during the implantation of the membrane tube stent, in order to prevent the membrane tube stent from coming out prematurely, the diameter of the elastic positioning member 130 changes to the maximum, thereby contacting and positioning with the positioning part 113, and the release ball 110 is fixedly connected with the storage tube 120 through the connecting hose 190, so that the membrane tube stent is restricted in the storage tube 120; when the membrane tube stent is delivered to the right place, the diameter of the elastic positioning member 130 becomes smaller, and the positioning ability with the positioning part 113 is released, and the release ball 110 comes out from one end of the storage tube 120, which is convenient for the deployment and release of the membrane tube stent.

[0052] In order to control the diameter change of the elastic positioning member 130, the connecting hose 190 includes a connecting inner tube 191 and a connecting outer tube 192. The connecting outer tube 192 is sleeved on the surface of the connecting inner tube 191. One end of the elastic positioning member 130 is fixed to the connecting outer tube 192, and the other end is fixed to the connecting inner tube 191. The operating unit is configured to control the connecting inner tube 191 and the connecting outer tube 192 to selectively move relative to each other, so that the elastic positioning member 130 can selectively block the opening 111 end of the inner cavity 112.

[0053] Since the connecting inner tube 191 and the connecting outer tube 192 can move relative to each other in the axial direction, the shape of the elastic positioning member 130 can be controlled. Specifically, the connecting hose 190 is configured as a structure in which the connecting outer tube 192 is sleeved on the surface of the connecting inner tube 191, one end of the elastic positioning member 130 is fixed to the connecting outer tube 192, and the other end opposite to the connecting inner tube 191 is fixed, and the operating unit controls the axial displacement of the connecting inner tube 191 and the connecting outer tube 192, thereby controlling the diameter of the elastic positioning member 130 to become larger or smaller.

[0054] The relative position between the connecting inner tube 191 and the connecting outer tube 192 is controlled by the operating unit. When the connecting inner tube 191 and the connecting outer tube 192 move to stretch the elastic positioning member 130, the elastic positioning member 130 can be stretched to form a strip, thereby losing the positioning ability with the positioning portion 113, releasing the ball 110 to separate from the storage tube 120, and facilitating the deployment and release of the membrane tube bracket.

[0055] When the connecting inner tube 191 and the connecting outer tube 192 move to compress the elastic positioning member 130, the elastic positioning member 130 can be compressed to form a spherical, disc-shaped or other shape with a larger diameter, thereby achieving a contact positioning effect with the positioning portion 113. The connecting hose 190 and the elastic positioning member 130 will release the ball 110 to connect with the storage tube 120, preventing the membrane tube bracket from escaping from the storage tube 120.

[0056] Please refer to Figure 5 and Figure 6 In this embodiment, the elastic positioning member 130 is a three-dimensional woven mesh structure. When the elastic positioning member 130 is in a compressed state, the elastic positioning member 130 is a three-dimensional mesh structure compressed into a disc shape; when the elastic positioning member 130 is in a stretched state, the elastic positioning member 130 is a strip-shaped three-dimensional mesh structure.

[0057] In this embodiment, in order to ensure the positioning function (strength) and elasticity of the elastic positioning member 130 , the elastic positioning member 130 is made of nickel-titanium alloy.

[0058] In this embodiment, the end of the elastic positioning member 130 away from the operating unit is fixed to the connecting inner tube 191, and the end of the elastic positioning member 130 close to the operating unit is fixed to the connecting outer tube 192, so that when the connecting inner tube 191 and the connecting outer tube 192 move, the diameter of the elastic positioning member 130 can change synchronously.

[0059] Please refer to Figure 4 In this embodiment, a receiving groove 114 is provided at one end of the release ball 110 away from the storage tube 120, and the connecting hose 190 (in this embodiment, the connecting inner tube 191) can be selectively accommodated in the receiving groove 114 to facilitate the positioning of the release ball 110 and the storage tube 120.

[0060] Please refer to Figure 1 In this embodiment, in order to ensure that the membrane tube stent cannot be dislocated in advance, the stent release unit further includes a connector 140, which is connected to the end of the storage tube 120 away from the release ball 110. In other embodiments, the shape of the storage tube 120 can also be changed, for example, the end of the storage tube 120 away from the release ball 110 is directly set to a closed structure that can only be connected to the hose 190.

[0061] Please refer to Figure 7 In order to control the movement process between the connecting inner tube 191 and the connecting outer tube 192 , the operating unit includes a first control component 150 , which is configured to control the diameter change of the elastic positioning member 130 .

[0062] The first control component 150 includes an outer tube connection handle 151 and an inner tube connection handle 152 which can be selectively spaced apart. The outer tube connection handle 151 is fixed to an end of the outer tube connection 192 away from the release ball 110, the inner tube connection handle 152 is fixed to an end of the inner tube connection 191 away from the release ball 110, and the inner tube connection 191 can selectively extend from the outer tube connection 192 at the end of the connecting hose 190 away from the release ball 110.

[0063] Please refer to Figure 4 , Figure 6 and Figure 8 When the outer tube handle 151 is in contact with the inner tube handle 152, the elastic positioning member 130 is stretched into a strip shape by the pulling force of the displacement change between the inner tube 191 and the outer tube 192; please refer to Figure 3 , Figure 4 and Figure 7 When the outer tube connection handle 151 and the inner tube connection handle 152 are spaced apart, the elastic positioning member 130 is compressed into a disc shape by the force of the displacement change between the inner tube connection 191 and the outer tube connection 192 .

[0064] Please refer to Figure 7 In the present embodiment, in order to facilitate the control of the distance between the outer tube handle 151 and the inner tube handle 152, the first control component 150 further includes a locking member 153. The locking member 153 can be selectively sleeved on the surface of the inner tube 191 between the outer tube handle 151 and the inner tube handle 152, so as to make the process of compressing the elastic positioning member 130 into a disc shape more stable, thereby reducing the difficulty of the user in maintaining the elastic positioning member 130 in a disc shape.

[0065] When the outer tube handle 151 is in contact with the inner tube handle 152 , the locking member 153 can also be sleeved on the surface of the outer tube handle 151 , thereby reducing the difficulty for the user to maintain the elastic positioning member 130 in a strip shape.

[0066] In this embodiment, when the elastic positioning member 130 is in contact with the positioning portion 113 for positioning, the locking member 153 is sleeved on the surface of the connecting inner tube 191 .

[0067] In this embodiment, in order to facilitate the removal and installation of the locking member 153, the locking member 153 is a C-shaped opening 111 ring.

[0068] Please refer to Figure 1 and Figure 2 In this embodiment, the operating unit also includes a handle 160, a fixed knob 170 and a handle 180, which are sequentially sleeved on the surface of the connecting hose 190 along the direction from the first control component 150 to the bracket release unit. The fixed knob 170 is connected to the handle 180, and the handle 160 and the fixed knob 170 can be selectively spaced apart for releasing the membrane tube bracket.

[0069] Please refer to Fig. 9In this embodiment, silicone positioning members 171 are provided on both sides of the channel inside the fixed knob 170, and the silicone positioning members 171 and the connecting outer tube 192 can be selectively squeezed and positioned. In this embodiment, the silicone positioning member 171 can squeeze the connecting outer tube 192 or loosen the connecting outer tube 192 by twisting. When the silicone positioning member 171 squeezes the connecting outer tube 192, the position of the connecting outer tube 192 is fixed, and the diameter of the elastic positioning member 130 is changed by controlling whether the locking member 153 is sleeved on the surface of the connecting inner tube 191; when the silicone positioning member 171 loosens the connecting outer tube 192, the connecting outer tube 192 as a whole can move relative to the fixed knob 170. Therefore, when the locking member 153 locks the relative position of the connecting inner tube 191 and the connecting outer tube 192, the connecting hose 190 as a whole can move relative to the fixed knob 170 to push the release ball 110 away from the storage tube 120, so that the release ball 110 can drive the membrane tube stent to unfold.

[0070] The working principle of the unlocking and releasing system 100 for a gastric bypass stent provided in this embodiment is as follows:

[0071] Please refer to Figure 2 The membrane tube support is accommodated in the storage tube 120 , one end of the storage tube 120 is clearance-matched with the release ball 110 , and the other end opposite is fixedly connected to the connector 140 to prevent the membrane tube support from escaping from the storage tube 120 in advance.

[0072] Please refer to Figure 3 , Figure 5 and Figure 7 The fixing knob 170 of the unlocking and releasing system 100 is screwed to squeeze the connecting outer tube 192 to prevent the connecting outer tube 192 from moving relative to the fixing knob 170; the locking member 153 is sleeved on the surface of the connecting inner tube 191 and is located between the connecting inner tube handle 152 and the connecting outer tube handle 151 to prevent the connecting inner tube 191 and the connecting outer tube 192 from moving relative to each other; since the connecting inner tube handle 152 and the connecting outer tube handle 151 are arranged at intervals, the elastic positioning member 130 is compressed into a disc shape, and the elastic positioning member 130 contacts and positions the positioning portion 113 of the releasing ball 110, thereby fixing the releasing ball 110 at one end of the receiving tube 120 to prevent the membrane tube bracket from falling out.

[0073] With the assistance of the gastroscope, the guide wire is sent into the pyloric opening, the gastroscope is withdrawn, and the guide wire is passed through the connecting inner tube 191 at one end of the release ball 110. The unlocking and releasing system 100 is sent into the pyloric opening under the guidance of the guide wire. Since the guide wire is centrally guided, the unlocking and releasing system 100 provided in this embodiment is more convenient and quick when entering the pyloric opening, and there is no need to use tools such as foreign body forceps to assist.

[0074] Please refer to Figure 4 , Figure 6 and Figure 8 After the unlocking and releasing system 100 is delivered to the position, the guide wire is withdrawn, the locking piece 153 is removed, and the connecting inner tube handle 152 is pulled to make the connecting inner tube handle 152 and the connecting outer tube handle 151 contact each other. The connecting inner tube 191 moves relative to the connecting outer tube 192 along with the connecting inner tube handle 152, so that the elastic positioning piece 130 is stretched into a strip shape, and the elastic positioning piece 130 contacts and releases the positioning part 113 of the release ball 110, and the release ball 110 leaves the storage tube 120. The operating handle 180 and the handle 160 release the membrane tube bracket, and then the fixing knob 170 is screwed to make the connecting outer tube 192 movable relative to the fixing knob 170, and the connecting inner tube handle 152 and the connecting outer tube handle 151 are pushed as a whole in the direction close to the fixing knob 170, so that the connecting hose 190 as a whole can completely push the release ball 110 out of the storage tube 120 and drive the membrane tube bracket to unfold.

[0075] Since the unlocking and releasing system 100 provided in this embodiment can directly push the release ball 110 with the connecting hose 190, and due to the flexibility of the connecting hose 190 and the central pushing effect, the risk of puncturing the membrane tube or even puncturing the intestine during the guide wire pushing process can be avoided.

[0076] Since the unlocking and releasing system 100 provided in this embodiment can directly realize the positioning and release of the release ball 110 through the connecting hose 190, there is no need to set an unlocking wire. Therefore, the unlocking and releasing system 100 provided in this embodiment has a simpler structure, less difficult operation, and higher safety in use. In addition, since the connecting hose 190 does not contain the unlocking wire, the space inside the connecting hose 190 can be used to accommodate the guide wire, so that the process of the guide wire guiding the unlocking and releasing system 100 into the body is centrally guided, which improves the efficiency of the unlocking and releasing system 100 in the body, reduces the difficulty of insertion, and avoids the risk of the unlocking wire breaking or getting stuck due to the entanglement of the unlocking wire when the guide wire and the unlocking wire are simultaneously set inside the connecting hose 190.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An unlocking and releasing system for a gastric bypass stent, characterized in that: It comprises a support release unit, a connecting hose and an operating unit, wherein two ends of the connecting hose are respectively connected to the support release unit and the operating unit; The support release unit includes a release ball, a storage tube and an elastic positioning piece. The storage tube is configured to selectively accommodate a membrane tube support. The release ball is gap-fitted with one end of the storage tube. A positioning cavity for accommodating the elastic positioning piece is provided in the release ball. The connecting hose passes through the storage tube and is accommodated in the release ball. The elastic positioning piece is sleeved on the surface of the connecting hose close to one end of the release ball, and the elastic positioning piece is a mesh structure with a selectively changeable diameter, so that the elastic positioning piece can be selectively positioned in the positioning cavity. The operating unit is configured to control the diameter change of the elastic positioning piece.

2. The system according to claim 1, characterized in that The positioning cavity includes an opening and an inner cavity, and the connection between the opening and the inner cavity is a positioning portion; the end of the release ball close to the receiving tube has an opening, and the opening is communicated with the inner cavity, and the elastic positioning member is accommodated in the inner cavity of the release ball; when the diameter of the elastic positioning member increases, the elastic positioning member contacts the positioning portion for positioning; Preferably, the connecting hose comprises a connecting inner tube and a connecting outer tube, the connecting outer tube is sleeved on the surface of the connecting inner tube, one end of the elastic positioning member is fixed to the connecting outer tube, and the other end opposite to the connecting inner tube is fixed, and the operating unit is configured to control the connecting inner tube and the connecting outer tube to selectively move relative to each other, so that the elastic positioning member can selectively block the open end of the inner cavity; Preferably, the elastic positioning member is a three-dimensional woven mesh structure; Preferably, the elastic positioning member is a three-dimensional mesh structure that can be selectively compressed into a disc shape; Preferably, the elastic positioning member is made of nickel-titanium alloy.

3. The system according to claim 2, characterized in that The operating unit includes a first control component configured to control the change in diameter of the elastic positioning member; The first control component includes an outer tube connection handle and an inner tube connection handle which can be selectively spaced apart, the outer tube connection handle is fixed to one end of the outer tube connection away from the release ball, the inner tube connection handle is fixed to one end of the inner tube connection away from the release ball, and the inner tube connection can selectively extend out of the outer tube connection at the end of the connecting hose away from the release ball.

4. The system according to claim 3, characterized in that The first control assembly further comprises a locking member, which can be selectively sleeved on the surface of the connecting inner tube between the connecting outer tube handle and the connecting inner tube handle; Preferably, when the elastic positioning member is in contact with the positioning portion for positioning, the locking member is sleeved on the surface of the connecting inner tube; Preferably, the locking member is a C-shaped open ring.

5. The system according to claim 3, characterized in that The operating unit also includes a handle, a fixed knob and a grip which are sequentially sleeved on the surface of the connecting hose along the direction from the first control component to the bracket release unit. The fixed knob is connected to the handle, and the handle and the fixed knob can be selectively spaced apart.

6. The system according to claim 5, characterized in that Silicone positioning pieces are arranged on both sides of the channel inside the fixed knob, and the silicone positioning pieces and the connecting outer tube can be selectively squeezed and positioned.

7. The system according to claim 2, characterized in that One end of the elastic positioning member away from the operating unit is fixed to the connecting inner tube, and one end of the elastic positioning member close to the operating unit is fixed to the connecting outer tube.

8. The system according to claim 1, characterized in that The support release unit also includes a connecting piece, which is connected to an end of the receiving tube away from the release ball.

9. The system according to claim 1, characterized in that An end of the release ball away from the receiving tube is provided with a receiving groove, and the connecting hose can be selectively received in the receiving groove.

10. A gastric bypass stent system, characterized in that: The invention comprises a membrane tube support and a system as claimed in any one of claims 1 to 9, wherein the membrane tube support can be selectively accommodated in the receiving tube.

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