Air bag adjusting type artery flow limiter

Abstract

The invention discloses an air bag adjusting type artery flow limiter, which belongs to the technical field of medical instruments and comprises a flow limiter and a flow limiting implanter. The flow limiter comprises an arterial stent and a flow limiting component; flow limiting control over a blood flow channel can be achieved through the double-layer air bag structure composed of the outer-layer flow limiting part and the inner-layer flow limiting part, the flow limiting implanter is filled with gas to expand the arterial stent of the net-shaped cylinder structure, the whole arterial stent expands outwards, and therefore the supporting size of the arterial stent is increased; after filling liquid is injected into the flow limiting component to enable the whole flow limiting component to be filled and expanded, a channel for blood circulation in the middle of the arterial stent can be narrowed, the blood flow is reduced by narrowing the blood flow channel, and the purposes of reducing the pressure in an arterial blood vessel and reducing the risk conditions of vascular rupture, bleeding and the like are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an air bag adjustable arterial flow restrictor. Background Art

[0002] At present, in clinical practice, for some cases where local arterial blood pressure is too high due to vascular stenosis, deformity, etc., implanting a flow limiter in the artery can limit blood flow, reduce arterial blood pressure, and reduce the risk of blood vessel rupture, bleeding, etc. The flow limiter used in the prior art is a mesh stent structure or a spiral stent structure, such as a flow limiting device with publication number CN218009845U, which includes a spiral and elastic first flared portion, the first flared portion is surrounded to form a first cavity, along the first direction, the diameter of the first cavity gradually decreases, and at least a part of the first flared portion along the first direction can elastically support the inner wall of the blood vessel, wherein the first direction is parallel to the axial direction of the first flared portion. In the above-mentioned flow limiting device, the first flared portion is arranged to form a first cavity, and the diameter of the first cavity gradually decreases along the first direction, that is, the first cavity is conical; this patent application limits the blood flow by designing a recess in the middle section to narrow the channel for blood circulation inside the spiral stent structure, but when this patent application is in use, since the whole is a spiral stent structure, the mid-section transition portion is also a mesh-like spiral structure. When limiting the blood flow, some blood will still flow out from the transition portion of the spiral structure, thereby causing the blood flow to change, and failing to achieve the purpose of effectively limiting the blood flow. Summary of the invention

[0003] The embodiment of the present invention provides a balloon-adjustable arterial flow restrictor to solve the above-mentioned technical problems.

[0004] The embodiment of the present invention adopts the following technical scheme: it includes a flow limiter and a flow limiting implant; the flow limiter includes an arterial stent and a flow limiting component; the arterial stent has an overall mesh structure of a cylinder, and the cylinder of the mesh structure can expand outward and expand the overall support range after internal expansion, so that the arterial stent can form a conflicting support with the inner wall of the arterial blood vessel inside the arterial blood vessel; the flow limiting component is located inside the arterial stent, and the flow limiting component can expand as a whole after being filled with liquid; the flow limiting implant is penetrated into the middle area between the arterial stent and the flow limiting component.

[0005] Preferably, the arterial stent is composed of a plurality of mesh structures intertwined and wound together. After internal expansion, the plurality of mesh structures arterial stents intertwined and wound together can produce a certain degree of deformation to expand the overall outer diameter.

[0006] Preferably, the flow-limiting component is made of silicone material that does not cause allergic reactions, and the flow-limiting component is located inside the mesh cylindrical structure artery stent.

[0007] Preferably, the current-limiting component is composed of an outer current-limiting part and an inner current-limiting part; both the outer current-limiting part and the inner current-limiting part are annular cylinder structures; the outer current-limiting part is closely attached to the inner wall of the arterial stent inside the arterial stent and is fixedly connected to the inner wall of the arterial stent; the inner current-limiting part is located in the middle of the outer current-limiting part, and the two end edge parts of the inner current-limiting part are fixedly connected to the two end edge parts of the outer current-limiting part, so that the inner current-limiting part and the outer current-limiting part form a flattened integrated annular cylinder structure; after the current-limiting component composed of the outer current-limiting part and the inner current-limiting part is filled with liquid, the inner current-limiting part can gradually expand towards the middle, making the middle area of the inner current-limiting part of the annular cylinder structure become narrow.

[0008] Preferably, a liquid inlet valve is arranged at a position corresponding to one end of the arterial stent on the inner current-limiting part; the liquid inlet valve includes a liquid inlet pipe and a liquid inlet plug; the liquid inlet pipe is fixedly arranged on the inner current-limiting part, and the liquid inlet pipe is a pipe body structure with both ends penetrating through; one end of the liquid inlet pipe extends to the area between the inner current-limiting part and the outer current-limiting part, and the other end of the liquid inlet pipe extends to the outside area of the inner current-limiting part; the liquid inlet plug is a barrel-shaped structure with one end penetrating through, the liquid inlet plug is arranged inside the liquid inlet pipe, and the penetrating end of the liquid inlet plug faces the area between the inner current-limiting part and the outer current-limiting part; through holes are arranged on the side wall of the liquid inlet plug, and the through holes are communicated with the inside of the liquid inlet plug.

[0009] Preferably, a thread is arranged on the outer side wall of the liquid inlet plug, a thread groove matching the thread on the liquid inlet plug is arranged on the inner wall of the pipe body structure of the liquid inlet pipe, and the threaded part on the liquid inlet plug is in threaded fit connection with the thread groove area in the liquid inlet pipe.

[0010] Preferably, a liquid injection pipe is arranged inside the liquid inlet plug, the liquid injection pipe can be inserted into the liquid inlet plug from the outer end of the arterial stent, and the liquid injection pipe is communicated with a matching liquid injection device.

[0011] Preferably, a slot is arranged at the inner wall of the barrel-shaped structure of the liquid inlet plug, the slot is arranged in a horizontal track, a plug block matching the slot is arranged on the outer side wall of the part of the liquid injection pipe that can be inserted into the liquid inlet plug, and the plug block is fixedly connected to the outer side wall of the liquid injection pipe.

[0012] Preferably, the flow-limiting implantor comprises a support tube, a first expansion balloon and a second expansion balloon. The interior of the support tube is a cavity, and the support tube can be communicatively connected to a matching gas filling device. The first expansion balloon and the second expansion balloon are both sleeved on the support tube, and the parts of the first expansion balloon and the second expansion balloon sleeved on the support tube are fixedly connected to the support tube. The distance between the first expansion balloon and the second expansion balloon matches the length of the flow limiter, that is, the first expansion balloon and the second expansion balloon are respectively located at both ends of the flow limiter inside the arterial stent on the support tube. The parts of the support tube located at the first expansion balloon and the second expansion balloon are provided with ventilation holes, which are communicatively connected to the internal cavity area of the support tube.

[0013] The above at least one technical solution adopted in the embodiment of the present invention can achieve the following beneficial effects:

[0014] First, the present patent application can achieve the flow-limiting control of the blood flow channel through the double-layer balloon structure composed of the outer flow-limiting part and the inner flow-limiting part. By filling the flow-limiting implantor with gas to expand the arterial stent with a reticular cylinder structure, the arterial stent as a whole expands outwards, so as to increase its own support volume. After injecting the filling liquid into the flow-limiting component to make the flow-limiting component expand and inflate as a whole, the channel for blood to flow through in the middle of the arterial stent can be narrowed, so as to reduce the blood flow by narrowing the blood flow channel, and achieve the reduction of the pressure in the arterial blood vessel and the reduction of the risks such as blood vessel rupture and bleeding.

[0015] Second, the outer flow-limiting part designed in the present patent application is fixedly connected to the inner wall of the arterial stent to form a seamless fit, completely blocking the path for blood to penetrate through the reticular gap of the stent, and solving the problem of blood leakage in the prior art; when the inner flow-limiting part bulges, the part where the outer flow-limiting part is fixedly connected to the arterial stent will drain the blood, so that the blood can only flow through between the inner flow-limiting parts, thereby ensuring that the blood flow is restricted.

[0016] Thirdly, after completing the expansion adjustment of the arterial stent, the liquid injection device matching the liquid injection tube can be immediately started, so that the filling liquid enters the liquid inlet plug through the liquid injection tube. As the liquid fills, the liquid will be injected into the chamber area between the inner flow-limiting part and the outer flow-limiting part through the through hole of the liquid inlet plug. As the liquid continuously fills, the inner flow-limiting part made of silica gel will expand and bulge accordingly. After the inner flow-limiting part bulges to the specified state, the liquid injection device can be closed, and then the entire liquid injection tube is rotated. At this time, under the traction of the insertion block, the slot part can be driven to make the liquid inlet plug rotate, and the liquid inlet plug can be gradually retracted into the wrapping range of the liquid inlet tube in a screwed-in state. At this time, the through hole part that originally leaked from the front end of the liquid inlet tube on the side wall of the liquid inlet plug will be blocked due to being wrapped inside the liquid inlet tube, so as to close the communication state directly formed by the chamber area between the inner flow-limiting part and the outer flow-limiting part, the liquid inlet plug, and the liquid injection tube, so that the liquid injected into the chamber area between the inner flow-limiting part and the outer flow-limiting part cannot flow back into the liquid injection tube through the through hole part of the liquid inlet plug, thereby preventing the liquid between the inner flow-limiting part and the outer flow-limiting part from leaking, and then maintaining the bulging state of the inner flow-limiting part, so that the bulged inner flow-limiting part can always maintain the flow-limiting state of restricting blood flow.

[0017] Fourthly, when starting the gas filling device to transport gas into the support tube, the gas will be injected into the first expansion airbag and the second expansion airbag through the air holes on the support tube, so that the first expansion airbag and the second expansion airbag expand due to gas filling, and play an expanding role in the interior of the arterial stent in the bulging state, so as to expand the originally contracted arterial stent outwards, so that the whole arterial stent expands, and in the subsequent use process, it contacts with the inner wall of the arterial blood vessel to support and position the whole flow limiter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and form a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 is a schematic structural view of the flow limiter in the present invention Figure 1 ;

[0020] Figure 2 is a schematic structural view of the flow limiter in the present invention Figure 2 ;

[0021] Figure 3 is a schematic three-dimensional structure view of the present invention Figure 1 ;

[0022] Figure 4 is a schematic three-dimensional structure view of the present invention Figure 2 ;

[0023] Figure 5 is a schematic diagram of the internal structure of the present invention;

[0024] Figure 6 is a schematic diagram of the internal structure of the current limiter in the present invention;

[0025] Figure 7 is a schematic diagram of the internal structure of the inner current limiting part in the present invention;

[0026] Figure 8 is a schematic diagram of the structure of the liquid inlet valve in the present invention;

[0027] Figure 9 is a disassembled schematic diagram of the liquid inlet valve in the present invention.

[0028] Reference numerals

[0029] Current limiter 1, arterial stent 11, current limiting component 12, outer current limiting part 13, inner current limiting part 14;

[0030] Current limiting implant 2, support tube 21, first expansion balloon 22, second expansion balloon 23, ventilation hole 24;

[0031] Liquid inlet valve 3, liquid inlet pipe 31, liquid inlet plug 32, through hole 33, thread 34, thread groove 35, liquid injection pipe 36, slot 37, plug 38. Detailed embodiments

[0032] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0033] The following will detail the technical solutions provided by each embodiment of the present invention with reference to the drawings.

[0034] An embodiment of the present invention provides an airbag-regulated arterial flow limiter, which includes a flow limiter 1 and a flow-limiting implant 2; the flow limiter 1 includes an arterial stent 11 and a flow-limiting component 12; the arterial stent 11 is a cylindrical body with an overall mesh structure, and the cylindrical body with the mesh structure can expand outward and expand the overall support range after internal expansion, so that the arterial stent 11 can form a contact support with the inner wall of the arterial blood vessel inside the arterial blood vessel; the flow-limiting component 12 is located inside the arterial stent 11, and the flow-limiting component 12 can expand as a whole after being filled with liquid; the flow-limiting implant 2 is arranged in the middle area of the arterial stent 11 and the flow-limiting component 12; the arterial stent 11 is composed of a plurality of intertwined and wound mesh structures. After internal expansion, the mesh-structured arterial stent 11 intertwined and wound together can deform to a certain extent to expand the overall outer diameter.

[0035] When implanting the flow limiter 1, the entire flow limiter 1 can be moved by manipulating the flow-limiting implant 2. After implanting the flow limiter 1 into the arterial blood vessel, the mesh cylindrical arterial stent 11 can be expanded by filling the flow-limiting implant 2 with gas, so that the arterial stent 11 expands outward as a whole, thereby increasing its own support volume. After the arterial stent 11 forms contact support with the inside of the arterial blood vessel, the gas filling is stopped immediately. Then, a filling liquid is injected into the flow-limiting component 12 to make the flow-limiting component 12 expand and swell as a whole, thereby narrowing the channel for blood flow in the middle of the arterial stent 11, realizing the narrowing of the blood flow channel to reduce the blood flow rate, achieving the reduction of the pressure in the arterial blood vessel, reducing the risks of blood vessel rupture, bleeding, etc., and addressing the problems of inaccurate flow limitation, blood leakage, inconvenient adjustment, etc. in the prior art.

[0036] In a further preferred embodiment, the flow-limiting component 12 is made of silicone material that will not cause an allergic reaction, and the flow-limiting component 12 is located inside the mesh cylindrical arterial stent 11; the flow-limiting component 12 is composed of an outer flow-limiting part 13 and an inner flow-limiting part 14; both the outer flow-limiting part 13 and the inner flow-limiting part 14 are annular cylindrical structures; the outer flow-limiting part 13 is closely attached to the inner wall of the arterial stent 11 inside the arterial stent 11 and is fixedly connected to the inner wall of the arterial stent 11; the inner flow-limiting part 14 is located in the middle of the outer flow-limiting part 13, and the two end edges of the inner flow-limiting part 14 are fixedly connected to the two end edges of the outer flow-limiting part 13, so that the inner flow-limiting part 14 and the outer flow-limiting part 13 form a flattened integrated annular cylindrical structure.

[0037] After the flow-limiting component 12 composed of the outer flow-limiting part 13 and the inner flow-limiting part 14 is filled with liquid, the inner flow-limiting part 14 can gradually expand towards the middle, making the middle area of the inner flow-limiting part 14 with an annular cylindrical structure become narrow.

[0038] By injecting a filling liquid between the inner flow-limiting part 14 and the outer flow-limiting part 13, the inner flow-limiting part 14 not fixedly connected to the arterial stent 11 can be gradually expanded and expanded towards the middle area of the arterial stent 11. Since the inner flow-limiting part 14 is fixedly connected to the edge parts at both ends of the outer flow-limiting part 13, the overall flow limiter 1 will form a ring-like structure bulging inward. At this time, the distance between the inner walls of the inner flow-limiting part 14 will gradually decrease, narrowing the blood flow channel in the middle of the entire arterial stent 11. When blood flows from one end of the arterial stent 11 to the other end, the outer flow-limiting part 13 will block the part of the arterial stent 11 in contact with it, thereby preventing blood from flowing through between the arterial stent 11 and the outer flow-limiting part 13 and causing the entire flow limiter 1 to be unable to control the blood flow limit;

[0039] Secondly, when blood flows through the middle of the arterial stent 11, the blood will gradually move along the edge part of the inner flow-limiting part 14 to the bulging middle part of the inner flow-limiting part 14. At this time, since the middle of the inner flow-limiting part 14 bulges in a ring shape, the blood flow channel available for blood flow will also narrow accordingly. Part of the blood will flow along the narrowed channel, while the rest of the blood will be blocked by the bulging part of the inner flow-limiting part 14, restricting the flow of blood that was originally flowing under high pressure in the arterial blood vessel, thereby reducing the flow pressure of the blood transported backward.

[0040] When blood flow is restricted by the inner flow-limiting part 14 in a bulged state inside the arterial stent 11, the flow rate of blood passing through the arterial stent 11 will decrease accordingly, and thus the high-pressure flow rate generated in the originally unrestricted blood flow state will be reduced. By adjusting the expansion degree of the inner flow-limiting part 14, the pressure in the arterial blood vessel can be stably controlled within the target range. For example, the systolic blood pressure can be reduced from 200 mmHg to 120 - 140 mmHg, significantly reducing the risk of blood vessel rupture and bleeding;

[0041] At the same time, the closing and blocking of the middle part of the arterial stent 11 by the outer flow-limiting part 13 can prevent blood from passing through between the arterial stent 11 and the outer flow-limiting part 13, thereby enabling blood drainage and draining the blood to the flow-limiting channel area of the inner flow-limiting part 14, so as to achieve the function of restricting blood flow, which is applicable to various complex vascular lesions. The specifications of the flow limiter 1 can be customized according to the diameter and pressure requirements of the blood vessels at the lesion site, improving the universality of the treatment plan. Secondly, the flow-limiting component 12 made of silicone material has good fatigue resistance and can still maintain a stable flow-limiting state after long-term implantation, reducing the probability of secondary surgical intervention.

[0042] In a further preferred embodiment, a liquid inlet valve 3 is provided at a position on the inner layer flow limiting portion 14 corresponding to one end of the arterial stent 11; the liquid inlet valve 3 includes a liquid inlet pipe 31 and a liquid inlet plug 32; the liquid inlet pipe 31 is fixedly provided on the inner layer flow limiting portion 14, and the liquid inlet pipe 31 is a pipe body structure that penetrates through both ends; one end of the liquid inlet pipe 31 extends to the region between the inner layer flow limiting portion 14 and the outer layer flow limiting portion 13, and the other end of the liquid inlet pipe 31 extends to the outer region of the inner layer flow limiting portion 14; the liquid inlet plug 32 is a barrel-shaped structure with one end penetrating through, the liquid inlet plug 32 is arranged inside the liquid inlet pipe 31, and the end of the liquid inlet plug 32 that penetrates through is arranged towards the region between the inner layer flow limiting portion 14 and the outer layer flow limiting portion 13; a through hole 33 is provided on the side wall of the liquid inlet plug 32, and the through hole 33 communicates with the inside of the liquid inlet plug 32.

[0043] In a further preferred embodiment, a thread 34 is provided on the outer side wall of the liquid inlet plug 32, a thread groove 35 matching the thread 34 on the liquid inlet plug 32 is provided on the inner wall of the pipe body structure of the liquid inlet pipe 31, and the threaded portion of the liquid inlet plug 32 and the thread groove 35 region in the liquid inlet pipe 31 are in threaded connection with each other; a liquid injection pipe 36 is provided inside the liquid inlet plug 32, the liquid injection pipe 36 can be inserted into the liquid inlet plug 32 from the outer end of the arterial stent 11, and the liquid injection pipe 36 communicates with a matching liquid injection device; a slot 37 is provided at the inner wall of the barrel-shaped structure of the liquid inlet plug 32, the slot 37 is arranged in a horizontal track, a plug 38 matching the slot 37 is provided on the outer side wall of the liquid injection pipe 36 at the portion that can be inserted into the liquid inlet plug 32, and the plug 38 is fixedly connected to the outer side wall of the liquid injection pipe 36;

[0044] The liquid injection device matching the liquid injection pipe 36 in this patent application is prior art, and is only used as a device for injecting liquid in this patent application, and is not within the protection scope of this patent application;

[0045] Before implanting the entire current limiter 1, the liquid injection tube 36 and the liquid inlet plug 32 are in a plugged state. When connecting, the insertion block 38 at the front end of the liquid injection tube 36 can be kept in correspondence with the slot 37 inside the liquid inlet plug 32. Then, the liquid injection tube 36 is inserted into the liquid inlet plug 32, so that the insertion block 38 on the liquid injection tube 36 can be gradually inserted into the slot 37 in a horizontal state. As the insertion block 38 on the liquid injection tube 36 is embedded in the slot 37 of the liquid inlet plug 32, the liquid injection tube 36 and the liquid inlet plug 32 form a connected state. When rotating the liquid injection tube 36, the slot 37 part can be driven under the action of the insertion block 38 to make the entire liquid inlet plug 32 rotate synchronously with the liquid injection tube 36. After rotating the liquid injection tube 36 to drive the liquid inlet plug 32 to be screwed into the inner area of the inner current limiting part 14 in a threaded 34 matching state in the liquid inlet tube 31, the through hole 33 part on the side wall of the liquid inlet plug 32 leaks out from the wrapping range of the liquid inlet tube 31, so that the chamber area between the inner current limiting part 14 and the outer current limiting part 13 is directly connected to the liquid inlet plug 32 and the liquid injection tube 36;

[0046] During operation, the liquid injection tube 36 and the current limiter implant 2 are used to implant the current limiter 1 into the arterial blood vessel together. After completing the expansion adjustment of the arterial stent 11, the liquid injection device matching the liquid injection tube 36 can be immediately started, so that the filling liquid enters the liquid inlet plug 32 through the liquid injection tube 36. As the liquid is filled, the liquid will be injected into the chamber area between the inner current limiting part 14 and the outer current limiting part 13 through the through hole 33 of the liquid inlet plug 32. As the liquid continues to fill, the inner current limiting part 14 made of silica gel will expand and bulge accordingly. After the inner current limiting part 14 bulges to the specified state, the liquid injection device can be closed, and then the entire liquid injection tube 36 is rotated. At this time, the slot 37 part can be driven under the traction action of the insertion block 38 to make the liquid inlet plug 32 rotate. When the liquid inlet plug 32 rotates, the thread 34 on the outside of the liquid inlet plug 32 will be in threaded 34 matching with the thread groove 35 on the inner wall of the liquid inlet tube 31, so that the liquid inlet plug 32 can be gradually retracted into the wrapping range of the liquid inlet tube 31 in a screwed-in state. At this time, the through hole 33 part on the side wall of the liquid inlet plug 32 that originally leaked out from the front end of the liquid inlet tube 31 will be blocked due to being wrapped inside the liquid inlet tube 31, so that the chamber area between the inner current limiting part 14 and the outer current limiting part 13 and the liquid inlet plug 32 and the liquid injection tube 36 are directly connected can be closed, and the liquid injected into the chamber area between the inner current limiting part 14 and the outer current limiting part 13 cannot flow back into the liquid injection tube 36 through the through hole 33 part of the liquid inlet plug 32, so as to prevent the liquid between the inner current limiting part 14 and the outer current limiting part 13 from leaking out, and then maintain the bulging state of the inner current limiting part 14, so that the bulged inner current limiting part 14 can always maintain the current limiting state of restricting the blood flow;

[0047] After the adjustment of the liquid inlet plug 32 is completed, the injection tube 36 can be directly withdrawn, so that the insertion block 38 on the injection tube 36 is immediately disengaged from the slot 37, and thus the disassembly operation of the injection tube 36 can be completed.

[0048] In a further preferred embodiment, the flow-limiting implant 2 includes a support tube 21, a first expansion balloon 22 and a second expansion balloon 23. The interior of the support tube 21 is provided with a cavity, and the support tube 21 can be communicatively connected to a matching gas filling device. The first expansion balloon 22 and the second expansion balloon 23 are both sleeved on the support tube 21, and the parts of the first expansion balloon 22 and the second expansion balloon 23 sleeved on the support tube 21 are fixedly connected to the support tube 21. The distance between the first expansion balloon 22 and the second expansion balloon 23 matches the length of the flow limiter 1, that is, the first expansion balloon 22 and the second expansion balloon 23 are respectively located at both ends of the flow limiter 1 inside the arterial stent 11 on the support tube 21. The parts of the support tube 21 where the first expansion balloon 22 and the second expansion balloon 23 are located are provided with ventilation holes 24, and the ventilation holes 24 communicate with the internal cavity area of the support tube 21;

[0049] The gas filling device matching the support tube 21 in this patent application is a prior art, which is only a conventional device used for gas filling and is not within the protection scope of this patent application;

[0050] When the flow limiter 1 is implanted, the arterial stent 11, which was originally in a contracted state, will be wrapped around the support tube 21, the first expansion airbag 22 and the second expansion airbag 23. When the gas filling device is started to transport gas into the support tube 21, the gas will be injected into the first expansion airbag 22 and the second expansion airbag 23 from the air vents 24 on the support tube 21, so that the interior of the first expansion airbag 22 and the second expansion airbag 23 will expand due to the gas filling, and expand the interior of the arterial stent 11 in a bulging state, so as to open the arterial stent 11, which was originally in a contracted state, to the outside, so that the arterial stent 11 is expanded as a whole, and in the subsequent use process, it comes into contact with the inner wall of the arterial blood vessel to support and position the entire flow limiter 1. After the implantation of the arterial stent 11 is completed, the gas filling can be stopped immediately. The operation of the surplus equipment can make the internal gas of the first expansion airbag 22 and the second expansion airbag 23 flow back into the support tube 21, and let the first expansion airbag 22 and the second expansion airbag 23 return to the initial state, so as to stop the expansion of the arterial stent 11. After the arterial stent 11 is placed in the arterial blood vessel, the support tube 21 can be directly withdrawn to make the first expansion airbag 22 and the second expansion airbag 23 detach from the arterial stent 11, and the implantation operation of the arterial stent 11 and the flow limiting component 12 can be completed. Among them, the first expansion airbag 22 and the second expansion airbag 23 in the flow limiting implanter 2 need to be evacuated before the inner layer flow limiting part 14 is expanded and bulged after the gas is withdrawn, so as to avoid the inner layer flow limiting part 14 after the bulge hindering the evacuation movement of the first expansion airbag 22 and the second expansion airbag 23 and the support tube 21.

[0051] The above description is only an embodiment of the present invention and is 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 substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An airbag-adjustable arterial flow limiter, characterized in that, It comprises a current limiter (1) and a current limiting implanter (2); The flow restrictor (1) comprises an arterial stent (11) and a flow restricting component (12); The arterial stent (11) has an overall reticular cylindrical body, which can expand outwards and enlarge the overall support range after internal expansion, so that the arterial stent (11) can form a supporting contact with the inner wall of the arterial blood vessel; The flow limiting component (12) is located inside the arterial stent (11), and the flow limiting component (12) is expandable as a whole after being filled with liquid; The flow limiting implant (2) is inserted into the middle area between the arterial stent (11) and the flow limiting component (12); The arterial stent (11) is composed of a plurality of mesh structures intertwined and wound together. After internal expansion, the plurality of mesh structures of the arterial stent (11) intertwined and wound together can be deformed to a certain extent to expand the overall outer diameter.

2. The airbag-adjustable artery flow limiter according to claim 1, characterized in that, The flow-limiting component (12) is made of a silicone material that does not cause allergic reactions, and the flow-limiting component (12) is located inside the arterial stent (11) with a mesh cylindrical structure.

3. The airbag-adjustable artery flow limiter according to claim 1, characterized in that, The flow limiting component (12) is composed of an outer layer flow limiting portion (13) and an inner layer flow limiting portion (14); The outer layer flow limiting portion (13) and the inner layer flow limiting portion (14) are both annular cylindrical structures; The outer layer flow limiting portion (13) is tightly attached to the inner wall of the arterial stent (11) inside the arterial stent (11), and is fixedly connected to the inner wall of the arterial stent (11); The inner flow limiting portion (14) is located in the middle of the outer flow limiting portion (13), and the edge portions at both ends of the inner flow limiting portion (14) are fixedly connected to the edge portions at both ends of the outer flow limiting portion (13), so that the inner flow limiting portion (14) and the outer flow limiting portion (13) form a similar flattened integrated annular cylindrical structure; After the flow limiting component (12) consisting of an outer flow limiting portion (13) and an inner flow limiting portion (14) is filled with liquid, the inner flow limiting portion (14) can gradually expand toward the middle, so that the middle area of ​​the inner flow limiting portion (14) of the annular cylindrical structure becomes narrow.

4. The airbag-adjustable arterial flow limiter according to claim 3, wherein, A liquid inlet valve (3) is provided on the inner layer flow limiting portion (14) at a position corresponding to one end of the arterial stent (11); The liquid inlet valve (3) comprises a liquid inlet pipe (31) and a liquid inlet plug (32); The liquid inlet pipe (31) is fixedly arranged on the inner layer flow limiting portion (14), and the liquid inlet pipe (31) is a pipe body structure with two ends penetrating therethrough; One end of the liquid inlet pipe (31) extends to the area between the inner layer flow limiting portion (14) and the outer layer flow limiting portion (13), and the other end of the liquid inlet pipe (31) extends to the outer area of ​​the inner layer flow limiting portion (14); The liquid inlet plug (32) is a barrel-shaped structure with one end penetrating therethrough. The liquid inlet plug (32) is arranged inside the liquid inlet pipe (31), and the end of the liquid inlet plug (32) penetrating therethrough is arranged toward the area between the inner layer flow limiting portion (14) and the outer layer flow limiting portion (13); A through hole (33) is provided on the side wall of the liquid inlet plug (32), and the through hole (33) is communicated with the interior of the liquid inlet plug (32).

5. The airbag-adjustable arterial flow limiter according to claim 4, characterized in that, The outer wall of the liquid inlet plug (32) is provided with a thread (34). The inner wall of the tube body structure of the liquid inlet pipe (31) is provided with a thread groove (35) that matches the thread (34) on the liquid inlet plug (32). The threaded part of the liquid inlet plug (32) is in threaded connection with the thread groove (35) area in the liquid inlet pipe (31).

6. The airbag-adjustable arterial flow limiter according to claim 3, wherein, The inside of the liquid inlet plug (32) is provided with a liquid injection tube (36). The liquid injection tube (36) can be inserted into the liquid inlet plug (32) from the outer end of the arterial stent (11) and is connected to a supporting liquid injection device.

7. The airbag-adjustable arterial flow limiter according to claim 3, characterized in that A slot (37) is provided at the inner wall of the barrel-shaped structure of the liquid inlet plug (32). The slot (37) is arranged in a horizontal track. The outer wall of the liquid injection tube (36) at the part that can be inserted into the liquid inlet plug (32) is provided with a plug (38) that matches the slot (37). The plug (38) is fixedly connected to the outer wall of the liquid injection tube (36).

8. The airbag-adjustable artery flow limiter according to claim 1, characterized in that, The flow-limiting implant (2) includes a support tube (21), a first expansion balloon (22) and a second expansion balloon (23). The inside of the support tube (21) is provided with a cavity and can be connected to a supporting gas filling device. The first expansion balloon (22) and the second expansion balloon (23) are both sleeved on the support tube (21), and the parts where the first expansion balloon (22) and the second expansion balloon (23) are sleeved on the support tube (21) are fixedly connected to the support tube (21). The distance between the first expansion balloon (22) and the second expansion balloon (23) matches the length of the flow limiter (1), that is, the first expansion balloon (22) and the second expansion balloon (23) are respectively located at both ends of the flow limiter (1) inside the arterial stent (11) on the support tube (21). The support tube (21) is provided with air holes (24) at the parts where the first expansion balloon (22) and the second expansion balloon (23) are located, and the air holes (24) are connected to the internal cavity area of the support tube (21).

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