CN119318553A - Unlocking release system of gastric bypass stent and gastric bypass stent system - Google Patents

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 equipment. In addition, because the connecting hose and the center of the release pellet are on the same straight line, and the installation of other structures or materials is not involved 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 pellet, the release pellet can enter the pylorus more conveniently and rapidly, and the operation convenience of the gastric diversion bracket in the process of placement is improved.

Description

Unlocking release system of gastric bypass stent and gastric bypass stent system

Technical Field

The invention relates to the technical field of medical equipment, in particular to an unlocking and releasing system of a gastric diversion bracket and a gastric diversion bracket system.

Background

According to the obesity diagnosis and treatment guide (2024 edition) issued by the national Wei Jian Committee, the prevalence rate of obesity of adults in China reaches 16.4%, and along with the enrichment of diets of economy and people in China, obesity has gradually developed into public health problems threatening the health of people. Existing treatment modes mainly comprise diet movement and behavior intervention, drug treatment, endoscopic weight loss and metabolic therapy (EBMT) and surgical treatment. EBMT has shown excellent efficacy in the area of weight loss as a non-surgical weight loss method, and is accepted by the American Society of Gastroenterology (ASGE) and European Society of Gastroenterology (ESGE).

The gastric diversion bracket system (the intraduodenal jejunum built-in sleeve) is characterized in that a membranous sleeve is arranged on the duodenum and the upper section of the jejunum through an endoscope to isolate chyme from being contacted with intestinal mucosa, and the hormone signals related to insulin resistance are interfered to influence the digestion and absorption of food, so that the aim of treating obesity and obesity related complications is fulfilled. The principle of the technology is similar to that of a surgical gastric bypass operation, but the operation is performed through a gastroscope without an operation, so that the technology has the advantages of being minimally invasive, easy to operate, free of damaging human body structures, easy to take out, capable of being repeatedly placed in, and the like, and has a good application prospect.

There are also related technologies of intraduodenal jejunum built-in sleeve outside the country, but usually multiple release lines are needed for auxiliary operation, so that the difficulty of operation is greatly increased, and once the operation is wrong, the discomfort of a patient and the risk of damaging a human body are increased.

In view of this, the present invention has been made.

Disclosure of Invention

The invention aims to provide an unlocking release system of a gastric bypass stent and a gastric bypass stent system.

The invention is realized in the following way:

In a first aspect, the invention provides an unlocking and releasing system of a gastric bypass stent, which comprises a stent releasing unit, a connecting hose and an operating unit, wherein two ends of the connecting hose are respectively connected with the stent releasing unit and the operating unit.

The support release unit comprises a release small ball, a storage tube and an elastic positioning piece, wherein the storage tube is configured to selectively contain the membrane tube support, the release small ball is in clearance fit with one end of the storage tube, a positioning cavity for containing the elastic positioning piece is formed in the release small ball, a connecting hose penetrates through the storage tube and is contained in the release small ball, the elastic positioning piece is sleeved on the surface of the connecting hose, which is close to one end of the release small ball, and is of a mesh structure with the diameter capable of being selectively changed, so that the elastic positioning piece can be selectively positioned in the positioning cavity, and the operating unit is configured to control the diameter change of the elastic positioning piece.

In an alternative embodiment, the positioning cavity comprises an opening and an inner cavity, the connecting part between the opening and the inner cavity is a positioning part, one end of the release small ball, which is close to the containing tube, is provided with the opening, the opening is communicated with the inner cavity, the elastic positioning piece is contained in the inner cavity of the release small ball, and when the diameter of the elastic positioning piece is increased, the elastic positioning piece is in contact positioning with the positioning part.

Preferably, the connection hose includes a connection inner tube and a connection outer tube, the connection outer tube is sleeved on the surface of the connection inner tube, one end of the elastic positioning member is fixed with the connection outer tube, the opposite end is fixed with the connection inner tube, and the operation unit is configured to control the connection inner tube and the connection outer tube to selectively move relatively 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 resilient positioning member is a three-dimensional mesh structure that is selectively compressible into a dish shape.

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

In an alternative embodiment, the operating unit comprises a first control assembly configured to control the diameter change of the resilient positioning member.

The first control assembly comprises a connecting outer pipe handle and a connecting inner pipe handle which can be arranged at intervals selectively, the connecting outer pipe handle is fixed with one end of the connecting outer pipe, which is far away from the release ball, the connecting inner pipe handle is fixed with one end of the connecting inner pipe, which is far away from the release ball, and the connecting hose is arranged at one end, which is far away from the release ball, of the connecting inner pipe, and the connecting inner pipe can be selectively extended out of the connecting outer pipe.

In an alternative embodiment, the first control assembly further comprises a locking member that is selectively engageable with a surface of the connecting inner tube between the connecting outer tube handle and the connecting inner tube handle.

Preferably, when the elastic positioning piece is positioned in contact with the positioning part, the locking piece is sleeved on the surface of the connecting inner tube.

Preferably, the locking member is a C-shaped split ring.

In an alternative embodiment, the operation unit further comprises a handle, a fixing 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 fixing knob is connected with the handle, and the handle and the fixing knob can be selectively arranged at intervals.

In an alternative embodiment, the two sides of the channel inside the fixing knob are provided with silica gel positioning pieces, and the silica gel positioning pieces and the connecting outer tube can be selectively extruded and positioned.

In an alternative embodiment, the end of the elastic positioning member remote from the operation unit is fixed to the connecting inner tube, and the end of the elastic positioning member close to the operation unit is fixed to the connecting outer tube.

In an alternative embodiment, the stent delivery unit further comprises a connector connected to the end of the receiving tube remote from the delivery pellet.

In an alternative embodiment, the end of the release ball, which is far away from the storage tube, is provided with a receiving groove, and the connecting hose can be selectively received in the receiving groove.

In a second aspect, the present invention provides a gastric bypass stent system comprising a stent, and a system according to any of the preceding embodiments, the stent being selectively receivable within a receiving tube.

The invention has the following beneficial effects:

The invention provides an unlocking and releasing system of a gastric bypass stent and a gastric bypass stent system, which are characterized in that by improving the structure of a connecting hose, the elastic locating piece is sleeved on the outer surface of the connecting hose, and the operating unit controls the diameter of the elastic locating piece to be increased or decreased. When the diameter of the elastic positioning piece is minimum, the net structure of the elastic positioning piece can be stretched to form a columnar structure, the positioning effect of the elastic positioning piece is relieved, the release ball is released, the membrane tube support is driven to be unfolded, and the membrane tube support is placed. In addition, because the connecting hose and the center of the release pellet are on the same straight line, and the installation of other structures or materials is not involved 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 pellet, the release pellet can enter the pylorus more conveniently and rapidly, and the operation convenience of the gastric diversion bracket in the process of placement is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an unlocking and releasing system of a gastric bypass stent according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an unlocking release system for a gastric bypass stent according to an embodiment of the present invention;

FIG. 3 is an enlarged view of the structure A of FIG. 2;

FIG. 4 is an enlarged view of the A structure of the release pellet release process;

FIG. 5 is a schematic diagram illustrating a compressed state of an elastic positioning member according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a stretched state of an elastic positioning member according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a first control assembly in a compressed state of an elastic positioning member according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a first control assembly in a stretched state of an elastic positioning member according to an embodiment of the present invention;

fig. 9 is a structural cross-sectional view of a handle and a fixing knob provided in an embodiment of the present invention.

The main reference numerals are 100-unlock release system, 110-release ball, 111-opening, 112-cavity, 113-detent, 114-receiving slot, 120-receiving tube, 130-elastic detent, 140-connector, 150-first control assembly, 151-connecting outer tube handle, 152-connecting inner tube handle, 153-locking member, 160-handle, 170-securing knob, 171-silicone detent, 180-handle, 190-connecting hose, 191-connecting inner tube, 192-connecting outer tube.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 and 2, the present embodiment provides an unlock release system 100 of a gastric bypass stent, which includes a stent release unit, a connection hose 190 and an operation unit, wherein two ends of the connection hose 190 are respectively connected with the stent release unit and the operation unit.

The unlocking and releasing system 100 is a key structure for assisting the gastric bypass stent to enter a corresponding position in a body and releasing the stent graft, wherein the stent releasing unit is used for accommodating the stent graft in the process of placing the stent graft so as to prevent the stent graft from being pulled out in advance, and the stent releasing unit is used for releasing the stent graft into the body after the stent graft is placed in place. The operation unit is connected with the stent releasing unit through a connection hose 190, and controls the control process of the stent releasing unit on the stent by controlling the connection hose 190.

Referring to fig. 3, the stent releasing unit includes a releasing ball 110, a receiving tube 120 and an elastic positioning member 130.

The receiving tube 120 is configured to selectively receive a stent graft. When the membrane tube bracket is in a conveying state, the membrane tube bracket is accommodated in the accommodating tube 120, and after the membrane tube bracket is conveyed in place, the membrane tube bracket can be separated from the accommodating tube 120 under the cooperation of structures such as the release ball 110 and the like and is placed in the body.

Referring to fig. 4, the release ball 110 is in clearance fit with one end of the receiving tube 120, so that the release ball 110 can be separated from the receiving tube 120, the membrane tube bracket is convenient to separate from the receiving tube 120, and the release ball 110 can drive the membrane tube bracket to separate from the receiving tube 120 and then spread.

Referring to fig. 3 and 4, a positioning cavity for accommodating the elastic positioning member 130 is disposed in the release ball 110, the positioning cavity includes an opening 111 and an inner cavity 112, and a connection portion between the opening 111 and the inner cavity 112 is a positioning portion 113. The release ball 110 is provided with an opening 111 at one end close to the storage tube 120, an inner cavity 112 is arranged in the release ball 110, the opening 111 is communicated with the inner cavity 112, a positioning part 113 is arranged at the joint of the opening 111 and the inner cavity 112, a connecting hose 190 passes through the storage tube 120 and is accommodated in the release ball 110, an elastic positioning piece 130 is sleeved on the surface of the connecting hose 190, the elastic positioning piece 130 is accommodated in the inner cavity 112 of the release ball 110, and the elastic positioning piece 130 is of a net-shaped structure with a diameter capable of being selectively changed, so that the elastic positioning piece 130 and the positioning part 113 can be selectively positioned.

The connection hose 190 passes through the receiving tube 120 and cooperates with the positioning portion 113 in the release pellet 110 through the elastic positioning member 130, thereby achieving a controllable connection of the receiving tube 120 and the release pellet 110. Since the connection hose 190 passes through the receiving tube 120 and is received in the release ball 110, the diameter of the elastic positioning member 130 is changed to the maximum in order to prevent the membrane tube stent from being removed in advance during the insertion of the membrane tube stent, thereby contacting and positioning the positioning portion 113, the release ball 110 is fixedly connected with the receiving tube 120 through the connection hose 190 to restrain the membrane tube stent in the receiving tube 120, and after the membrane tube stent is delivered in place, the diameter of the elastic positioning member 130 is reduced to release the positioning capability of the positioning portion 113, and the release ball 110 is removed from one end of the receiving tube 120, thereby facilitating the deployment and release of the membrane tube stent.

In order to control the diameter change of the elastic positioning member 130, the connection hose 190 includes a connection inner tube 191 and a connection outer tube 192, the connection outer tube 192 is sleeved on the surface of the connection inner tube 191, one end of the elastic positioning member 130 is fixed to the connection outer tube 192, the opposite end is fixed to the connection inner tube 191, and the operation unit is configured to control the connection inner tube 191 and the connection outer tube 192 to selectively move relatively so that the elastic positioning member 130 selectively blocks the open 111 end of the inner cavity 112.

Since the axial directions of the connection inner tube 191 and the connection outer tube 192 can be relatively moved, the shape of the elastic positioning member 130 can be controlled. Specifically, the connection hose 190 is provided in a structure in which the connection outer tube 192 is sleeved on the surface of the connection inner tube 191, one end of the elastic positioning member 130 is fixed with the connection outer tube 192, the opposite end is fixed with the connection inner tube 191, and the operation unit controls the axial displacement of the connection inner tube 191 and the connection outer tube 192, thereby controlling the diameter of the elastic positioning member 130 to become larger or smaller.

The relative position between the connecting inner tube 191 and the connecting outer tube 192 is controlled by the operation 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 stretch to form a bar shape, thereby losing the positioning capability with the positioning portion 113, and the release ball 110 is separated from the receiving tube 120, so that the membrane tube bracket can be conveniently unfolded and released.

When the connection inner tube 191 and the connection outer tube 192 move to compress the elastic positioning member 130, the elastic positioning member 130 can be compressed to form a shape with a larger diameter such as a sphere, a disc, etc., so as to realize a contact positioning function with the positioning portion 113, and the connection hose 190 and the elastic positioning member 130 connect the release ball 110 with the receiving tube 120, thereby preventing the membrane tube holder from being separated from the receiving tube 120.

Referring to fig. 5 and 6, in the present 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, and when the elastic positioning member 130 is in a stretched state, the elastic positioning member 130 is a strip-shaped three-dimensional mesh structure.

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.

In the present embodiment, one end of the elastic positioning member 130 far from the operation unit is fixed to the connection inner tube 191, and one end of the elastic positioning member 130 near to the operation unit is fixed to the connection outer tube 192, so that the diameters of the elastic positioning member 130 can be changed synchronously when the connection inner tube 191 and the connection outer tube 192 are moved.

Referring to fig. 4, in the present embodiment, a receiving groove 114 is formed at an end of the release ball 110 away from the receiving tube 120, and a connection hose 190 (in the present embodiment, a connection inner tube 191) is selectively received in the receiving groove 114, so as to facilitate positioning of the release ball 110 and the receiving tube 120.

Referring to fig. 1, in this embodiment, in order to ensure that the stent graft cannot be pulled out in advance, the stent release unit further includes a connecting member 140, and the connecting member 140 is connected to an end of the receiving tube 120 away from the release pellet 110. In other embodiments, the shape of the receiving tube 120 may be changed, for example, by directly disposing the end of the receiving tube 120 away from the release ball 110 in a closed structure that can be achieved only by the connection hose 190.

Referring to fig. 7, in order to control the moving process between the connecting inner tube 191 and the connecting outer tube 192, the operating unit includes a first control assembly 150, and the first control assembly 150 is configured to control the diameter change of the elastic positioning member 130.

The first control assembly 150 includes a connecting outer tube handle 151 and a connecting inner tube handle 152 that may be selectively spaced apart, the connecting outer tube handle 151 being fixed to an end of the connecting outer tube 192 remote from the release ball 110, the connecting inner tube handle 152 being fixed to an end of the connecting inner tube 191 remote from the release ball 110, and the connecting hose 190 being in an end remote from the release ball 110, the connecting inner tube 191 being selectively extendable from the connecting outer tube 192.

Referring to fig. 4, 6 and 8, when the connection outer tube handle 151 is in contact with the connection inner tube handle 152, the elastic positioning member 130 is stretched into a bar shape by a tensile force of a displacement change between the connection inner tube 191 and the connection outer tube 192, and referring to fig. 3, 4 and 7, when the connection outer tube handle 151 is spaced apart from the connection inner tube handle 152, the elastic positioning member 130 is compressed into a disc shape by a force of a displacement change between the connection inner tube 191 and the connection outer tube 192.

Referring to fig. 7, in this embodiment, in order to facilitate controlling the distance between the outer connecting tube handle 151 and the inner connecting tube handle 152, the first control assembly 150 further includes a locking member 153, and the locking member 153 can be selectively sleeved on the surface of the inner connecting tube 191 between the outer connecting tube handle 151 and the inner connecting tube handle 152, so that the process of compressing the elastic positioning member 130 into a disc shape is more stable, and the difficulty for a user to maintain the elastic positioning member 130 to have a disc shape is reduced.

When the connecting outer tube handle 151 contacts with the connecting inner tube handle 152, the locking member 153 can also be sleeved on the surface of the connecting outer tube handle 151, so that the difficulty of the user in maintaining the elastic positioning member 130 to be in a bar shape is reduced.

In the present embodiment, when the elastic positioning member 130 is positioned in contact with the positioning portion 113, the locking member 153 is fitted over the surface of the connecting inner tube 191.

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

Referring to fig. 1 and 2, in the present embodiment, the operation unit further includes a handle 160, a fixing knob 170 and a handle 180 sequentially sleeved on the surface of the connection hose 190 along the direction from the first control assembly 150 to the stent releasing unit, the fixing knob 170 is connected to the handle 180, and the handle 160 and the fixing knob 170 are selectively arranged at intervals for releasing the stent.

Referring to fig. 9, in the present embodiment, two sides of the channel inside the fixing knob 170 are provided with silicone positioning members 171, and the silicone positioning members 171 and the connecting outer tube 192 can be selectively pressed and positioned. In this embodiment, the silicone positioning member 171 can be screwed to press the connecting outer tube 192 or release the connecting outer tube 192, when the silicone positioning member 171 presses the connecting outer tube 192, the position of the connecting outer tube 192 is fixed, 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, and when the silicone positioning member 171 releases the connecting outer tube 192, the whole connecting outer tube 192 can move relative to the fixing knob 170, so that when the locking member 153 locks the relative positions of the connecting inner tube 191 and the connecting outer tube 192, the whole connecting hose 190 can move relative to the fixing 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 bracket to be unfolded.

The operating principle of the unlocking and releasing system 100 of the gastric diversion stent provided in this embodiment is as follows:

Referring to fig. 2, the stent is accommodated in the accommodating tube 120, one end of the accommodating tube 120 is in clearance fit with the release ball 110, and the opposite end is fixedly connected with the connecting piece 140, so as to prevent the stent from being removed from the accommodating tube 120 in advance.

Referring to fig. 3, 5 and 7, the fixing knob 170 of the unlocking release system 100 is screwed to the pressing connection outer tube 192 to prevent the connection outer tube 192 from moving relative to the fixing knob 170, the locking member 153 is sleeved on the surface of the connection inner tube 191 and located between the connection inner tube handle 152 and the connection outer tube handle 151 to prevent the connection inner tube 191 and the connection outer tube 192 from moving relative to each other, and the elastic positioning member 130 is compressed into a disc shape due to the spaced arrangement of the connection inner tube handle 152 and the connection outer tube handle 151, the elastic positioning member 130 is positioned in contact with the positioning portion 113 of the release pellet 110 to fix the release pellet 110 at one end of the receiving tube 120 to prevent the membrane tube holder from being removed.

Under the assistance of gastroscope, send the guide wire into the pylorus, withdraw the gastroscope, penetrate the guide wire from the connection inner tube 191 of release ball 110 one end in, the unblock release system 100 sends into the pylorus through the guide of guide wire, because the guide wire is central guide, therefore the unblock release system 100 that this embodiment provided is more convenient and fast when getting into the pylorus, need not the assistance of instrument such as use foreign matter pincers.

Referring to fig. 4, 6 and 8, after the unlocking release system 100 is delivered in place, the guide wire is withdrawn, the locking member 153 is removed, the connecting inner tube handle 152 is pulled to bring the connecting inner tube handle 152 into contact with the connecting outer tube handle 151, the connecting inner tube 191 moves with the connecting inner tube handle 152 relative to the connecting outer tube 192 to stretch the elastic positioning member 130 into a bar shape, the elastic positioning member 130 contacts with the release ball 110 to release the positioning portion 113 from the storage tube 120, the release ball 110 is separated from the storage tube 120, the handle 180 and the handle 160 are operated to release the film tube holder, and then the fixing knob 170 is screwed to move the connecting outer tube 192 relative to the fixing knob 170, the connecting inner tube handle 152 and the connecting outer tube handle 151 are pushed integrally in a direction approaching the fixing knob 170, so that the connecting hose 190 can completely push the release ball 110 out of the storage tube 120 and drive the film tube holder to be unfolded.

Since the unlocking release system 100 provided in this embodiment can directly push the release ball 110 with the connection hose 190, the risk of puncturing the membrane tube and even the intestinal tract during the pushing of the guide wire can be avoided due to the flexibility and the central pushing action of the connection hose 190.

Since the unlock release system 100 provided in this embodiment can directly realize positioning and release of the release ball 110 through the connection hose 190, no unlock line is required, and therefore the unlock release system 100 provided in this embodiment has a simpler structure, less operation difficulty and higher use safety. In addition, since the unlocking line is not contained in the connection hose 190, the space inside the connection hose 190 can be used for containing the guide wire, so that the guide wire guides the unlocking release system 100 to enter the body for guiding the process in the center, the in-vivo implantation efficiency of the unlocking release system 100 is improved, the implantation difficulty is reduced, and the risk that the unlocking line is broken or blocked due to the fact that the unlocking line is wound and knotted when the guide wire and the unlocking line are simultaneously arranged inside the connection hose 190 is avoided.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The unlocking and releasing system of the gastric diversion stent is characterized by comprising a stent releasing unit, a connecting hose and an operating unit, wherein two ends of the connecting hose are respectively connected with the stent releasing unit and the operating unit;

The support release unit comprises a release small ball, a storage tube and an elastic positioning piece, wherein the storage tube is configured to selectively contain a membrane tube support, the release small ball is in clearance fit with one end of the storage tube, a positioning cavity for containing the elastic positioning piece is formed in the release small ball, a connecting hose penetrates through the storage tube and is contained in the release small ball, the elastic positioning piece is sleeved on the surface, close to one end of the release small ball, of the connecting hose, the elastic positioning piece is of a mesh structure with a diameter capable of being selectively changed, so that the elastic positioning piece can be selectively positioned in the positioning cavity, and the operating unit is configured to control the diameter change of the elastic positioning piece.

2. The system of claim 1, wherein the positioning cavity comprises an opening and an inner cavity, wherein a connection between the opening and the inner cavity is a positioning part, wherein one end of the release ball, which is close to the containing tube, is provided with an opening, the opening is communicated with the inner cavity, and the elastic positioning piece is accommodated in the inner cavity of the release ball;

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 piece is fixed with the connecting outer tube, the opposite end is fixed with the connecting inner tube, and the operating unit is configured to control the connecting inner tube and the connecting outer tube to selectively move relatively so that the elastic positioning piece can selectively block the opening end of the inner cavity;

preferably, the elastic positioning piece is of a three-dimensional woven mesh structure;

Preferably, the elastic positioning piece is a three-dimensional net structure which can be selectively compressed into a dish shape;

preferably, the elastic positioning member is made of nickel-titanium alloy.

3. The system of claim 2, wherein the operating unit comprises a first control assembly configured to control a diameter change of the resilient positioning member;

The first control assembly comprises a connecting outer pipe handle and a connecting inner pipe handle which can be arranged at intervals selectively, wherein the connecting outer pipe handle is fixed with one end of the connecting outer pipe, which is far away from the release ball, the connecting inner pipe handle is fixed with one end of the connecting inner pipe, which is far away from the release ball, and the connecting hose is arranged at one end of the connecting inner pipe, which is far away from the release ball, and the connecting inner pipe can be selectively stretched out of the connecting outer pipe.

4. The system of claim 3, wherein the first control assembly further comprises a locking member selectively nestable against a surface of the inner connecting tube between the outer connecting tube handle and the inner connecting tube handle;

Preferably, when the elastic positioning piece is positioned in contact with the positioning part, the locking piece is sleeved on the surface of the connecting inner pipe;

Preferably, the locking member is a C-shaped split ring.

5. The system of claim 3, wherein the operating unit further comprises a handle, a fixing knob and a grip sequentially sleeved on the surface of the connection hose along the direction from the first control assembly to the bracket releasing unit, the fixing knob being connected with the grip, and the handle being selectively spaced from the fixing knob.

6. The system of claim 5, wherein the two sides of the channel inside the fixing knob are provided with silicone positioning members, and the silicone positioning members and the connecting outer tube can be selectively pressed and positioned.

7. The system of claim 2, wherein an end of the elastic positioning member remote from the operation unit is fixed to the connection inner tube, and an end of the elastic positioning member near the operation unit is fixed to the connection outer tube.

8. The system of claim 1, wherein the stent release unit further comprises a connector connected to an end of the receiving tube remote from the release pellet.

9. The system of claim 1, wherein an end of the release pellet remote from the receiving tube defines a receiving slot, the connection hose being selectively receivable within the receiving slot.

10. A gastric bypass stent system comprising a stent and a system according to any one of claims 1 to 9, the stent being selectively receivable within the receiving tube.