Precise stent implantation device for maintaining smoothness of gastric tract

Abstract

The invention discloses a precise stent implantation device for maintaining smoothness of a gastric tract, and relates to the technical field of gastric tract stent implantation devices.The precise stent implantation device for maintaining smoothness of the gastric tract comprises a probing and stretching tube, a stent assembly is arranged at the front end of the probing and stretching tube and installed at an implantation tube, and the stent assembly is connected with the probing and stretching tube. The support assembly is composed of a control unit and an adjusting unit, the end, away from the support assembly, of the stretching pipe is connected with a guide pipe, and a gas conveying pipe used for conveying gas and a wire are arranged in the guide pipe. The magnetic ring and the magnetic rod part repel each other in magnetism, the magnetic rod part expands preliminarily under the action of repulsive force in a folded and attached state, the magnetic rod part is in an ultimate expansion state and is matched with rapid current cut-off, so that the magnetism of the magnetic ring is rapidly lost, and the stent part is rapidly reset in a folded state in cooperation with wriggling of the gastric tract. The situation that the gastric tract is torn due to anchoring thorns, anti-falling barbs and other structures and cannot be suitable for gastric fistula and other situations is avoided, and the health and safety of a patient are further guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of gastric tract stent implantation devices, and in particular to a precise stent implantation device for maintaining gastric tract patency. Background Art

[0002] Diseases such as esophageal cancer obstruction, esophageal cancer stenosis, pyloric and duodenal malignant obstruction occur in the gastric tract. Due to the occlusion of the gastric tract, the above diseases can only be treated with pioneering surgery to maintain gastric tract patency. With the development of modern medicine, stent implantation is popular due to its excellent effects such as small incision and low damage. Stent implantation refers to the use of puncture, catheter, balloon catheter expansion and metal stent placement to expand and recanalize narrowed and occluded blood vessels or cavities, thereby solving the blind spots of traditional surgery.

[0003] Its advantages are small trauma, high efficacy, low risk, few complications, and short hospital stay, which has opened up a new path for stenosis and occlusion of blood vessels and cavities. The development direction of surgery is to achieve the same or even higher efficacy with the smallest possible trauma. The successful clinical application of laparoscopy and coronary artery dilatation and angioplasty is a typical example. The 21st century is the century of minimally invasive medicine. Interventional radiology technology is a major component of minimally invasive medicine, which conforms to the development direction of medicine with minimal trauma, higher efficacy and lower risk.

[0004] Currently, the stent is firmly supported in the gastric tract by means of anchoring thorns, anti-detachment barbs and other structures. However, when ulcers, malignant obstruction occur in the gastric tract, or gastric fistula occurs due to imbalanced defense of the gastric mucosa under the invasion of high gastric acid and pepsin, the anchoring or barb areas can easily cause secondary ulcers, infections and even external fistulas in the gastric tract, causing the area where the stent is implanted to be in a state of tearing, bleeding and infection, making it impossible to guarantee the health of the patient. In addition, the current stent implantation devices have poor adaptability and cannot be used in the above-mentioned situations. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a precise stent implantation device for maintaining gastric tract patency, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a precise stent implantation device for maintaining gastric tract patency, comprising a probe tube for inserting into the gastric tract of a patient, a stent assembly being arranged at the front end of the probe tube, the stent assembly being installed at the implantation tube, and the stent assembly being composed of a control unit and an adjustment unit, wherein the control unit is connected to the stent component, and the stent component is controlled by the control unit to determine a retracted state and an expanded state, so that the stent component is in a retracted state during the extension of the probe tube, and after reaching the area where patency needs to be maintained, the expanded state is opened by the control unit, and a catheter is connected to the end of the probe tube away from the stent assembly, wherein in order to avoid gastric tract lacerations caused by structures such as anchoring thorns and anti-detachment barbs, and to be unsuitable for situations such as gastric fistula, and to further ensure the health and safety of the patient, a gas supply pipe and a wire for transmitting gas are arranged in the catheter, which transmit harmless gas and a certain strength of magnetism that does not affect the human body to stabilize the stent component in the expanded state.

[0007] A further improvement of the technical solution of the present invention is that the control unit includes a socket that is generally cylindrical, and the socket is distributed axially along the extension tube. A movable port for the catheter to pass through is opened in the socket, and the socket is connected to the adjustment unit through the movable port. In order to enable the control unit to complete the control of the folded state and the expanded state of the bracket, the outer end surface of the socket is symmetrically provided with track grooves opened on its surface, and each of the track grooves is arranged with control blocks in an array, and the sliding of the control blocks on the track grooves serves as a control switch for the folded state and the expanded state of the bracket. Each of the control blocks is slidably connected to the socket through the track groove. In order to prevent the control block from detaching from the track groove and the socket due to gastric peristalsis, gravity and accidental touch, the side walls of the track groove are provided with protrusions extending to both sides of the top of the control block.

[0008] A further improvement of the technical solution of the present invention is that a corresponding extension control rod is fixedly installed on the top of each control block. When the extension control rod is not completely retracted when the extension tube is inserted, the bracket and the control unit will scratch the esophagus, and it will be impossible to continue to extend the probe deeply. In this case, it is necessary to ensure that the extension control rod is in a larger retracted state. Each extension control rod is in a curved shape and the material is selected to be a soft polymer material. The curved areas of two adjacent extension control rods form a joint. The other ends of the two adjacent extension control rods are fixedly connected together, and the other ends of the two adjacent extension control rods are provided with an abutment portion. It should be noted that structures such as anchoring thorns and anti-detachment barbs can be selectively installed on the abutment portion. When the abutment portion is in the final expanded state of the bracket, its abutment portion will also fit the gastric tract wall. Therefore, the structure of the anchoring thorn is also applicable to the present application. However, it can be seen from the above that structures such as anchoring thorns or anti-detachment barbs need to be determined according to the specific situation of the patient's intestine.

[0009] A further improvement of the technical solution of the present invention lies in that each of the abutting portions is fixedly connected to a corresponding magnetic rod portion. It should be noted that in order to ensure that the stent component fits well with the sleeve component in the folded state and avoid scratching the esophagus and stomach tract, the shape of the magnetic rod portion can be set to an arc shape, aiming to fit the outer wall end face of the sleeve component when folded. The other end of each of the magnetic rod portions is fixedly connected to a rotating shaft, and each of the rotating shafts is rotatably installed in a linkage seat. Multiple groups of the linkage seats are arranged in an array on the outer end face of the sleeve component, and the linkage seat is fixedly connected to the outer end face of the sleeve component.

[0010] A further improvement of the technical solution of the present invention is that: a magnetic ring is arranged in the middle of the outer end surface of the sleeve, and the magnetic ring is fixedly sleeved on the sleeve, and the magnetic pole of the magnetic ring is the same as that of the magnetic rod part. Furthermore, the magnetism of the magnetic ring and the magnetic rod part repels each other, so in the process of generating magnetism, the magnetic rod part is initially expanded under the action of the repulsive force in the closed and fitted state, and after the magnetic strength B of the magnetic ring is stabilized, the magnetic rod part is in the extreme expansion state, and the magnetic ring is made of electromagnet material, and the magnetic ring is close to one end of the extension tube. The center of the circle is arranged with extension wires, and the other end of each extension wire passes through The implant tube is connected to the wire in the catheter. Furthermore, in the process of retraction, the present application does not need to pull the guide wire. This process of pulling can easily cause secondary damage to the wound surface of the gastric ulcer, and the magnitude of the traction force cannot be accurately controlled. It is too limited to rely solely on the experience and intuition of the surgeon. Therefore, the present application quickly cuts off the current of the wire, so that the magnetism of the magnetic ring is quickly lost, and the peristalsis of the gastric tract is coordinated to quickly restore the stent to the retracted state. Furthermore, the current flow direction is changed to complete the reversal of the magnetic pole of the magnetic ring, so as to achieve the adsorption of the magnetic rod part and realize the rapid retraction. Therefore, it can be known from the above that the present invention uses the magnetic repulsion between the magnetic ring and the magnetic rod part. Therefore, in the process of the magnetic ring generating magnetism, the magnetic rod part is initially expanded under the action of the repulsive force in the retracted and fitted state. After the magnetic strength B of the magnetic ring is stabilized, the magnetic rod part is in the extreme expansion state, and the current is quickly cut off, so that the magnetism of the magnetic ring is quickly lost, and the peristalsis of the gastric tract itself is cooperated to quickly restore the stent to the retracted state, avoiding the anchoring thorns, anti-detachment barbs and other structures that cause gastric tract lacerations, and is not suitable for situations such as gastric fistula, etc., to further ensure the health and safety of the patient, and cooperate with the air tube to transmit harmless gas and a certain strength of magnetism that does not affect the human body to make the stent component stable in the expanded state.

[0011] A further improvement of the technical solution of the present invention is that: the bracket member includes a mounting portion formed by a combination portion and a magnetic rod portion on one side, the combination portion is arranged with a transverse partition A in an axial array along the bending area of ​​the extended control rod, the mounting portion is provided with a plurality of groups of bending members A connected to the corresponding transverse partition A, the other end of each bending member A is fixedly installed on the magnetic rod portion on one side, a plurality of groups of transverse partitions B are fixedly arranged on the plurality of groups of bending members A, the transverse partitions B and the bending members A form a mesh structure with multiple meshes, and a bending member B is provided between each of the extended control rods and the side wall of the adjacent magnetic rod portion. , the bending part B forms a mesh structure with the magnetic rod part and the extension control rod, wherein it should be noted that there is an elastic filling material in the mesh holes of the mesh structure, and the elastic filling material can be fixed to the mesh structure by suturing, heat sealing or gluing, and the diaphragm A, the bending part A, the diaphragm B, and the bending part B are all woven with metal wires, and the selected material can be nickel-titanium alloy wire, which has elasticity and harmlessness and does not affect the folding control of the present application and the safety of the patient, and can be used as a component material of the stent, and the elastic filling material can be any one of expanded polytetrafluoroethylene, polyester, and polyurethane; Furthermore, when the stent is in a collapsed state, the mesh holes of its mesh structure shrink, so elastic filling material is required in the mesh holes. When the stent is in an expanded state, the mesh structure expands and the mesh holes recover to achieve close contact with the gastric wall, thereby achieving stable fixation of the stent without the aid of structures such as anchoring thorns.

[0012] A further improvement of the technical solution of the present invention is that: the adjustment unit includes a clamping part arranged at the moving port, and the clamping part is limitedly connected with the sleeve part through the moving port, and cooperates with the air pressure transmitted by the air pipe in the catheter, so the movement of the clamping part drives the sleeve part, and finally realizes the rapid adjustment of the overall implantation position of the stent in the gastric tract, and the array on the clamping part is provided with sliding blocks, and the sliding blocks are fixedly connected with the clamping part, and the sliding blocks slide in the sliding groove of the implant tube, and each of the sliding blocks is fixedly connected with a push rod A, and each of the outer end surfaces of the push rod A is welded with a limiting protrusion, and the push rod A is slidably connected with the sliding part A through the limiting protrusion, in order to prevent the air pressure transmitted by the air pipe from overflowing into the gastric tract, a sealing cylinder is fixedly installed on one side of the sliding part A, and a sliding part B is fixedly installed on the other end of the sealing cylinder.

[0013] A further improvement of the technical solution of the present invention is that: a gas delivery port is provided on the sealing tube, a sealing sleeve is sleeved on the outer end surface of the sealing tube, and the sealing sleeve is installed on the inner end surface of the ring-shaped expansion airbag. Furthermore, the expansion airbag connects the gas delivery port through the sealing sleeve, and while avoiding the overflow of air pressure, the excess air pressure can enter the interior of the expansion airbag, thereby causing the expansion airbag to expand, and with the expansion of its ring-shaped structure and the support member, the expansion airbag is finally fitted into the gastric tract, and the narrowed and blocked gastric tract can be expanded and reopened better. The sliding member B slides on the pushing rod B, and a telescopic rod is fixedly installed between the pushing rod B and the pushing rod A, and a spring is fixedly sleeved between the pushing rod B and the pushing rod A.

[0014] A further improvement of the technical solution of the present invention is that a threaded portion is provided at one end of the probe tube close to the implant tube, and an internal thread groove matching the threaded portion is provided inside the implant tube.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: through the magnetic repulsion between the magnetic ring and the magnetic rod, the magnetic rod is initially expanded under the action of the repulsive force in the closed and fitted state, and after the magnetic strength of the magnetic ring is stabilized, the magnetic rod is in the extreme expansion state, and the current is quickly cut off, so that the magnetism of the magnetic ring is quickly lost, and the peristalsis of the gastric tract itself is cooperated to quickly restore the stent to the closed state, avoiding the anchoring thorns, anti-detachment barbs and other structures causing the gastric tract to be in a lacerated state, and being unable to be applied to situations such as gastric fistula, further ensuring the health and safety of the patient, and cooperating with the airway to transmit harmless gas and a certain strength of magnetism that does not affect the human body to make the stent complete the stability of the expanded state; The gas inlet is connected through a sealing sleeve to prevent the air pressure from overflowing. The excess air pressure can enter the expansion balloon, thereby causing the expansion balloon to expand. Combined with the expansion of its annular structure and the support component, the expansion balloon is finally fitted into the gastric tract, thereby better expanding and recanalizing the narrowed and blocked gastric tract.

[0016] During the extension process through the extension tube, the stent is in a retracted state. After reaching the area that needs to be kept unobstructed, the control unit starts the expansion state. A catheter is connected to the end of the extension tube away from the stent assembly. In order to avoid lacerations of the gastric tract caused by structures such as anchoring thorns and anti-detachment barbs, and to prevent the stent from being suitable for situations such as gastric fistula, and to further ensure the health and safety of the patient, a gas pipe and a wire for transmitting gas are provided in the catheter to transmit harmless gas and a certain strength of magnetism that does not affect the human body to stabilize the stent in the expanded state. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of a precise stent implantation device for maintaining gastric tract patency; Figure 2A schematic diagram showing a front view of a precise stent implantation device for maintaining gastric tract patency; Figure 3 A schematic diagram of a control unit in a precise stent implantation device for maintaining gastric tract patency; Figure 4 A schematic diagram of the structure of a control unit and a stent component in a precise stent implantation device for maintaining gastric tract patency; Figure 5 A schematic diagram of a sleeve and related mechanisms in a precise stent implantation device for maintaining gastric tract patency; Figure 6 A schematic side view of a control unit in a precise stent implantation device for maintaining gastric tract patency; Figure 7 A schematic diagram of the overall structure of a control unit in a precise stent implantation device for maintaining gastric tract patency; Figure 8 This is a schematic diagram of the structure of the control unit part of the precise stent implantation device for maintaining gastric tract patency; Fig. 9 This is a schematic diagram of the structure of the control unit in the precise stent implantation device used to maintain gastric tract patency.

[0018] In the figure: 100, extension tube; 200, implant tube; 300, catheter; 401, sleeve; 402, moving port; 403, track groove; 404, control block; 405, protrusion; 406, extension control rod; 407, joint; 408, abutment; 409, magnetic rod; 410, rotating shaft; 411, linkage seat; 412, magnetic ring; 413, extension wire; 501, mounting portion; 502, diaphragm A; 503, bending part A; 504, cross partition B; 505, bending part B; 601, clamping part; 602, sliding block; 603, pushing rod A; 604, limiting protrusion; 605, sliding part A; 606, sealing cylinder; 607, sliding part B; 608, air delivery port; 609, sealing sleeve; 610, expansion airbag; 611, pushing rod B; 612, telescopic rod; 613, spring; 400, threaded part. DETAILED DESCRIPTION

[0019] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0020] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0021] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0022] In the first embodiment, the present invention provides a precise stent implantation device for maintaining gastric tract patency, including a probe tube 100 for inserting into the gastric tract of a patient, a stent assembly being arranged at the front end of the probe tube 100, the stent assembly being installed at the implantation tube 200, and the stent assembly being composed of a control unit and an adjustment unit, wherein the control unit is connected to the stent component, and the stent component is controlled by the control unit to determine the contracted state and the expanded state, so that the stent component is in a contracted state during the extension of the probe tube 100, and after reaching the area where patency needs to be maintained, the control unit turns on the expanded state, and a catheter 300 is connected to one end of the probe tube 100 away from the stent assembly, wherein in order to avoid gastric laceration caused by structures such as anchoring thorns and anti-detachment barbs, and inability to be applied to situations such as gastric fistula, and to further ensure the health and safety of the patient, a gas supply pipe and a wire for transmitting gas are arranged in the catheter 300, which transmit harmless gas and a certain strength of magnetism that does not affect the human body to stabilize the stent component in the expanded state.

[0023] Embodiment 2, based on embodiment 1, further discloses the control of the stent member in the collapsed state and the expanded state. The control unit includes a sleeve 401 which is generally cylindrical. The sleeve 401 is distributed along the axial direction of the extension tube 100. A movable port 402 for the catheter 300 to pass through is provided in the sleeve 401. The sleeve 401 is connected to the adjustment unit through the movable port 402. In order to enable the control unit to complete the control of the stent member in the collapsed state and the expanded state, the outer end surface of the sleeve 401 is symmetrically provided with a track groove opened on its surface. 403, each track groove 403 is provided with control blocks 404 arranged in an array, and the sliding of the control blocks 404 on the track groove 403 serves as a control switch for the stent component to be folded and expanded, and each control block 404 is slidably connected to the sleeve 401 through the track groove 403. In order to prevent the control block 404 from being separated from the track groove 403 and the sleeve 401 due to gastric peristalsis, gravity and accidental touch, the side walls of the track groove 403 are provided with protrusions 405 extending to both sides of the top of the control block 404.

[0024] A corresponding extension control rod 406 is fixedly installed on the top of each control block 404. When the extension control rod 406 is not completely retracted when the extension tube 100 is inserted, the bracket and the control unit will scratch the esophagus, and it will be impossible to continue to extend the probe deeply. In this case, it is necessary to ensure that the extension control rod 406 is in a larger retracted state. Each extension control rod 406 is in a curved shape and is made of a soft polymer material. The curved areas of two adjacent extension control rods 406 form a joint 407. The other ends of the two adjacent extension control rods 406 are fixedly connected together, and the other ends of the two adjacent extension control rods 406 are provided with an abutment portion 408. It should be noted that structures such as anchoring thorns and anti-detachment barbs can be selectively installed on the abutment portion 408. When the abutment portion 408 is in the final expanded state of the bracket, its abutment portion 408 will also fit the gastric wall. Therefore, the structure of the anchoring thorn is also applicable to the present application. However, it can be seen from the above that structures such as anchoring thorns or anti-detachment barbs need to be determined according to the specific conditions of the patient's intestine.

[0025] Each abutment portion 408 is fixedly connected to a corresponding magnetic rod portion 409. It should be noted that in order to ensure that the stent component fits well with the sleeve 401 in the folded state and avoid scratching the esophagus and stomach tract, the shape of the magnetic rod portion 409 can be set to an arc shape, which is intended to fit the outer wall end face of the sleeve 401 when folded. The other end of each magnetic rod portion 409 is fixedly connected to a rotating shaft 410, and each rotating shaft 410 is rotatably installed in a linkage seat 411. A plurality of linkage seats 411 are arranged in an array on the outer end face of the sleeve 401, and the linkage seat 411 is fixedly connected to the outer end face of the sleeve 401.

[0026] A magnetic ring 412 is provided in the middle of the outer end surface of the sleeve 401, and the magnetic ring 412 is fixedly sleeved on the sleeve 401. The magnetic poles of the magnetic ring 412 and the magnetic rod part 409 are the same. Furthermore, the magnetism of the magnetic ring 412 and the magnetic rod part 409 repel each other. Therefore, in the process of generating magnetism by the magnetic ring 412, the magnetic rod part 409 is initially expanded under the action of the repulsive force in the closed and fitted state. After the magnetic strength B of the magnetic ring 412 is stabilized, the magnetic rod part 409 is in the extreme expansion state. Therefore, the magnetic ring 412 is made of electromagnet material, and an array of extension wires 413 is arranged on the center of the circle at one end of the magnetic ring 412 close to the extension tube 100, and each extension wire 413 is arranged on the center of the circle. One end of the implant tube 200 is connected to the wire in the catheter 300. Furthermore, in the process of retraction, the present application does not need to pull the guide wire. This process of pulling can easily cause secondary damage to the wound surface of the gastric ulcer, and the magnitude of the traction force cannot be accurately controlled. It is too limited to rely solely on the experience and intuition of the surgeon. Therefore, the present application quickly cuts off the current of the wire, so that the magnetism of the magnetic ring 412 is quickly lost, and the stent is quickly restored to the retracted state in cooperation with the peristalsis of the gastric tract itself. Furthermore, the current flow direction is changed to complete the magnetic pole reversal of the magnetic ring 412, so as to achieve the adsorption of the magnetic rod 409 and realize the rapid retraction. Therefore, it can be known from the above that the present invention uses the magnetic repulsion between the magnetic ring 412 and the magnetic rod portion 409. Therefore, in the process of the magnetic ring 412 generating magnetism, the magnetic rod portion 409 is initially expanded under the action of the repulsive force in the retracted and fitted state. After the magnetic strength B of the magnetic ring 412 is stabilized, the magnetic rod portion 409 is in an extreme expansion state, and the current is quickly cut off, so that the magnetism of the magnetic ring 412 is quickly lost, and the peristalsis of the gastric tract itself is cooperated to quickly restore the stent to the retracted state, avoiding the anchoring thorns, anti-detachment barbs and other structures that cause the gastric tract to be torn, and is not suitable for situations such as gastric fistula, etc., to further ensure the health and safety of the patient, and cooperate with the air tube to transmit harmless gas and a certain strength of magnetism that does not affect the human body to make the stent stable in the expanded state.

[0027] In the third embodiment, the bracket member includes a mounting portion 501 formed by a coupling portion 407 and a magnetic rod portion 409 on one side, the coupling portion 407 is provided with a transverse partition A502 arranged in an axial array along the bending area of ​​the extended control rod 406, and the mounting portion 501 is provided with a plurality of groups of bending members A503 connected to the corresponding transverse partition A502, and the other end of each bending member A503 is fixedly installed on the magnetic rod portion 409 on one side, and a plurality of groups of transverse partitions B504 are fixedly arranged on the plurality of groups of bending members A503, and the transverse partitions B504 and the bending members A503 form a mesh structure with multiple meshes, and a bending member A503 is provided between each extended control rod 406 and the side wall of the adjacent magnetic rod portion 409. Part B505, the bending part B505 and the magnetic rod part 409 and the extension control rod 406 form a mesh structure, wherein it should be noted that there is an elastic filling material in the mesh holes of the mesh structure, and the elastic filling material can be fixed to the mesh structure by suturing, heat sealing or gluing, and the diaphragm A502, the bending part A503, the diaphragm B504, and the bending part B505 are all woven with metal wires, and the selected material can be nickel-titanium alloy wire, which has elasticity and harmlessness and does not affect the folding control of the present application and the safety of the patient, and can be used as a component material of the stent, and the elastic filling material can be any one of expanded polytetrafluoroethylene, polyester, and polyurethane; Furthermore, when the stent is in a collapsed state, the mesh holes of its mesh structure shrink, so elastic filling material is required in the mesh holes. When the stent is in an expanded state, the mesh structure expands and the mesh holes recover to achieve close contact with the gastric wall, thereby achieving stable fixation of the stent without the aid of structures such as anchoring thorns.

[0028] In order to quickly adjust the support position of the stent, the adjustment unit includes a clamping member 601 arranged on the moving port 402. The clamping member 601 is limitedly connected with the sleeve member 401 through the moving port 402, and the air pressure transmitted by the air pipe in the catheter 300 is matched. Therefore, the movement of the clamping member 601 drives the sleeve member 401, and finally realizes the rapid adjustment of the implantation position of the stent as a whole in the gastric tract. The clamping member 601 is arrayed with a sliding block 602, and the sliding block 602 is fixedly connected to the clamping member 601. The sliding block 602 slides in the sliding groove 603 of the implant tube 200, and each sliding block 602 is fixedly connected with a push rod A603, and a limiting protrusion 604 is welded on the outer end surface of each push rod A603. The push rod A603 is slidably connected with a sliding member A605 through the limiting protrusion 604. In order to prevent the air pressure transmitted by the air tube from overflowing into the gastric tract, a sealing tube 606 is fixedly installed on one side of the sliding member A605, and a sliding member B607 is fixedly installed on the other end of the sealing tube 606.

[0029] A gas delivery port 608 is provided on the sealing tube 606, and a sealing sleeve 609 is sleeved on the outer end surface of the sealing tube 606, and the sealing sleeve 609 is installed on the inner end surface of the ring-shaped expansion balloon 610. Furthermore, the expansion balloon 610 connects the gas delivery port 608 through the sealing sleeve 609, and while avoiding the overflow of air pressure, the excess air pressure can enter the expansion balloon 610, thereby expanding the expansion balloon 610, and with its ring-shaped structure and the expansion of the support member, the expansion balloon 610 is finally fitted into the gastric tract, so as to better expand and reopen the narrow and occluded gastric tract. The sliding member B607 slides on the pushing rod B611, and a telescopic rod 612 is fixedly installed between the pushing rod B611 and the pushing rod A603, and a spring 613 is fixedly sleeved between the pushing rod B611 and the pushing rod A.

[0030] A threaded portion 400 is disposed at one end of the extension tube 100 close to the implant tube 200 , and an internal thread groove matching the threaded portion 400 is disposed in the implant tube 200 .

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precise stent implantation device for maintaining gastric tract patency, characterized in that: The invention comprises a probe tube (100) for inserting into the gastric tract of a patient, wherein a stent assembly is arranged at the front end of the probe tube (100), wherein the stent assembly is installed at the implant tube (200), and the stent assembly is composed of a control unit and an adjustment unit, wherein the control unit is connected to the stent component, and the stent component is controlled by the control unit to determine the contraction state and the expansion state, and the end of the probe tube (100) away from the stent assembly is connected to a catheter (300), and a gas transmission tube and a guide wire for transmitting gas are arranged inside the catheter (300).

2. A precise stent implantation device for maintaining gastric tract patency according to claim 1, characterized in that: The control unit comprises a sleeve (401) which is generally cylindrical in shape. The sleeve (401) is axially distributed along the extension tube (100). A movable opening (402) for the catheter (300) to pass through is provided in the sleeve (401). The sleeve (401) is connected to the adjustment unit via the movable opening (402). The outer end surface of the sleeve (401) is symmetrically provided with track grooves (403) opened on its surface. Each of the track grooves (403) is provided with control blocks (404) arranged in an array. Each of the control blocks (404) is slidably connected to the sleeve (401) via the track groove (403), and the side walls of the track groove (403) are provided with protrusions (405) extending to both sides of the top of the control block (404).

3. A precise stent implantation device for maintaining gastric tract patency according to claim 2, characterized in that: A corresponding extended control rod (406) is fixedly mounted on the top of each control block (404); each extended control rod (406) is in a curved shape and is made of a soft polymer material; the curved regions of two adjacent extended control rods (406) form a joint portion (407); the other ends of the two adjacent extended control rods (406) are fixedly connected together; and the other ends of the two adjacent extended control rods (406) are provided with an abutment portion (408).

4. A precise stent implantation device for maintaining gastric tract patency according to claim 3, characterized in that: Each of the abutting portions (408) is respectively fixedly connected to a corresponding magnetic rod portion (409); the other end of each of the magnetic rod portions (409) is respectively fixedly connected to a rotating shaft (410); each of the rotating shafts (410) is respectively rotatably mounted in a linkage seat (411); a plurality of groups of linkage seats (411) are arranged in an array on an outer end surface of the sleeve (401); and the linkage seats (411) are fixedly connected to the outer end surface of the sleeve (401).

5. The precise stent implantation device for maintaining gastric tract patency according to claim 4, characterized in that: A magnetic ring (412) is provided in the middle of the outer end surface of the sleeve (401), and the magnetic ring (412) is fixedly sleeved on the sleeve (401). The magnetic ring (412) has the same magnetic pole as the magnetic rod (409), and the magnetic ring (412) is made of an electromagnet. Extension wires (413) are arranged in an array on the center of a circle at one end of the magnetic ring (412) close to the extension tube (100), and the other end of each extension wire (413) passes through the implant tube (200) to connect to the wire in the catheter (300).

6. The precise stent implantation device for maintaining gastric tract patency according to claim 5, characterized in that: The support member comprises a mounting portion (501) formed by a coupling portion (407) and a magnetic rod portion (409) on one side; the coupling portion (407) is provided with a transverse partition A (502) arranged in an axial array along a bending region of an extended control rod (406); the mounting portion (501) is provided with a plurality of groups of bending members A (503) connected to corresponding transverse partitions A (502); the other end of each bending member A (503) is fixedly mounted on a magnetic rod portion (409) on one side; a plurality of groups of transverse partitions B (504) are fixedly arranged on the plurality of groups of bending members A (503); the transverse partitions B (504) and the bending members A (503) form a mesh structure with multiple meshes; and a bending member B (505) is provided between each extended control rod (406) and a side wall of an adjacent magnetic rod portion (409); the bending member B (505) forms a mesh structure with the magnetic rod portion (409) and the extended control rod (406).

7. The precise stent implantation device for maintaining gastric tract patency according to claim 6, characterized in that: The adjustment unit comprises a clamping member (601) arranged at the moving port (402), the clamping member (601) is limitedly connected to the sleeve member (401) through the moving port (402), a sliding block (602) is arranged in an array on the clamping member (601), the sliding block (602) is fixedly connected to the clamping member (601), the sliding block (602) slides in a sliding groove (603) of the implant tube (200), and each of the sliding blocks (602) is fixedly connected to a push rod A (603), the outer end surface of each of the push rods A (603) is welded with a limiting protrusion (604), the push rod A (603) is slidably connected to a sliding member A (605) through the limiting protrusion (604), a sealing cylinder (606) is fixedly installed on one side of the sliding member A (605), and a sliding member B (607) is fixedly installed on the other end of the sealing cylinder (606).

8. The precise stent implantation device for maintaining gastric tract patency according to claim 7, characterized in that: The sealing tube (606) is provided with a gas delivery port (608), the outer end surface of the sealing tube (606) is sleeved with a sealing sleeve (609), and the sealing sleeve (609) is installed on the inner end surface of a ring-shaped expansion airbag (610), the sliding member B (607) slides on the propulsion rod B (611), and a telescopic rod (612) is fixedly installed between the propulsion rod B (611) and the propulsion rod A (603), and a spring (613) is fixedly sleeved between the propulsion rod B (611) and the propulsion rod A.

9. The precise stent implantation device for maintaining gastric tract patency according to claim 1, characterized in that: A threaded portion (400) is provided at one end of the probe tube (100) close to the implant tube (200), and an internal thread groove matching the threaded portion (400) is provided inside the implant tube (200).

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