491 results about "Covered stent" patented technology

The invention discloses a windowing covered stent blood vessel and a delivery system, and belongs to the field of medical instruments, the windowing covered stent blood vessel comprises a covered stent blood vessel main body and a windowing assembly arranged on the covered stent blood vessel main body; wherein the windowing assembly at least comprises a barrel-shaped structural part and a connecting part, and the barrel-shaped structural part is provided with a channel matched with the branch support; the connecting piece is used for connecting the cylindrical structural piece and the covered stent blood vessel main body; the connecting piece is provided with a buffer part, so that the cylindrical structural piece is flexibly connected with the covered stent blood vessel main body; according to the windowing assembly, blocking of the branch support can be effectively avoided, and good wall attaching performance can be provided for the embedded branch support through the buffering part.

The invention relates to a covered stent, a stent system and a manufacturing method of the stent system.The covered stent comprises a main stent body, a covering film and binding wires, the main stent body comprises a main corrugated ring and a main covering film, the main corrugated ring is covered with the main covering film, the binding wires comprise the first binding wire, and the covering film and the main stent body are connected to one side of the main stent body through the first binding wire; the covered stent further comprises a first positioning piece and a second positioning piece, the first positioning piece is arranged at the proximal end of the main stent, the second positioning piece is arranged at the proximal end of the envelope, and when the covered stent is in a natural expansion state, when the envelope is naturally attached to the main stent in the circumferential direction, the envelope is located at the proximal end of the main stent. The first positioning piece and the second positioning piece are roughly located on the same radial line. According to the covered stent provided by the invention, a second fixed connection point of the envelope of the covered stent and the main stent can be determined, and the envelope is prevented from being fixed to the circumferential opposite side of the target position of the main stent, so that the problem of release of the proximal end of the main stent is avoided.

The invention relates to a covered stent and a stent system.The covered stent comprises a main stent body and a wrapping piece, the main stent body comprises a main corrugated ring and a main covering film, the main corrugated ring is covered with the main covering film, the wrapping piece is connected with the main stent body through a binding wire, the main stent body comprises a binding piece, and the binding piece is connected with the main stent body through a connecting wire. The binding piece comprises a part of the main body wave ring or comprises a binding line, the binding piece extends along the main body covering film, the main body covering film comprises a first through hole and a second through hole, and the first through hole and the second through hole are formed in the two sides of the extending direction of the binding piece respectively; and the binding wire passes through the first through hole and the second through hole and crosses the binding piece. The binding wire of the covered stent provided by the invention crosses the binding piece when penetrating through the main body covering film, when the covered stent is loaded or released, although the covering film and the main body covering film are pulled and stressed by the binding wire, the binding wire mainly pulls the binding piece, and when the binding wire is stressed, the possibility that film holes of the first through hole and the second through hole are expanded can be reduced, so that internal leakage is prevented.

The invention provides a covered stent coated with an electrostatic spinning membrane and a preparation method thereof.The covered stent comprises a metal stent and a covering membrane, the metal stent is composed of a spiral metal wire, the metal wire is provided with a plurality of zigzag parts which are evenly arranged and connected end to end, every two adjacent zigzag parts are in a wave crest shape and a wave trough shape respectively, and the multiple zigzag parts enable the metal wire to be in a wave shape; the covering film covers the surface of the metal support to form a tubular structure, and the tubular structure can be kept shaped after bending deformation at the lesion position so that the tubular structure can be matched with the lesion position in shape. The covered stent has a high specific surface area and an adjustable porous structure, the micron-sized aperture of the covered stent can effectively prevent blood permeation, the high porosity allows a proper amount of tissue or cells to penetrate, vascularization and tissue integration of the implanted stent are promoted, and therefore the risk of stent displacement or instability is reduced.

The invention discloses an aorta covered stent and an aorta covered stent assembly, and belongs to the technical field of medical instruments. The aorta covered stent comprises a main covered stent body and branch covered stents; a mounting opening is formed in the main body covered stent; the branch covered stent comprises an outer port and an inner port, the side, close to the upstream, of the edge of the outer port is connected with the mounting port through a first membrane, and the first membrane is provided with a first outer convex face and a first inner concave face which are oppositely arranged; one side, close to the downstream, of the edge of the inner port is connected with the mounting port through a second membrane, and the second membrane is provided with a second outer convex surface and a second inner concave surface which are oppositely arranged; the first membrane and the second membrane are connected through the third membrane, and the first membrane, the second membrane and the third membrane seal the installation opening. The assembly comprises a connecting covered stent and the aorta covered stent. The aorta covered stent which does not need to cut the healthy blood vessel of a patient, and is wide in application range, high in flexibility and small in compression occupied space can be formed.

The present invention relates to a stent (1) and a catheter system (2) comprising such a stent (1), the stent (1) comprising: a self-expandable scaffold (10) extending along an axial direction (x) comprising a plurality of open cells (11) formed by a plurality of circumferential strut structures (12) connected by axial struts (13) extending along the axial direction (x), the scaffold (10) comprising an outside facing away from an interior (14) of the stent (1) surrounded by the scaffold (10), the interior (14) forming a passage for blood through the stent (1) in an implanted state of the stent (1), a proximal end (15) configured to be connected to a catheter (3) to allow returning at least the scaffold (10) into a lumen (30) of the catheter (3), and a cover (16) arranged at least on the outside of the scaffold (10), the cover (16) being further configured to carry a drug to be administered and / or to seal a vascular rupture.

The invention provides a covered stent system, which comprises: a) a covered stent comprising: i) a positioning assembly; ii) a first branch blood vessel windowing assembly, wherein the first branch blood vessel windowing assembly comprises a first sealing area and a first adjusting area; the first sealing area 111 comprises a third opening; the first adjusting area comprises a first opening, a second opening, a first reinforcing structure and a second reinforcing structure; and b) a first branch covered stent, wherein the first branch covered stent is used for being released in the first branch blood vessel windowing assembly.

The invention relates to the technical field of biological tissue engineering, and discloses a man-machine interaction type automatic manufacturing system for organoid or other biological tissues, the man-machine interaction type automatic manufacturing system comprises a workbench, a mechanical arm, an industrial camera and a control module, a first covered stent of an array manufacturing area on the workbench is matched with a supporting assembly to form a containing cavity, and inert gel is arranged in the containing cavity; pressing the inert gel into a concave hole array by using an array mold to form a first cell carrier; the cell inoculation area is provided with a dehydration platform and a dehydration module, and the first covered stent is detachably connected with the dehydration module; the industrial camera is used for acquiring a concave hole array position image; the control module controls the mechanical arm to drive the pipette to implant cells into the concave hole array; a second cell carrier is arranged in the second covered stent, and the second cell carrier enters the concave hole array and wraps the cells to form a cell trap array. According to the human-computer interaction automatic manufacturing system for the organoid or other biological tissues, the high-flux manufacturing process of the organoid can be simplified, and the controllability and the consistency of the regeneration process of the organoid are improved.

The covered stent comprises a main stent body and a branch stent body, the main stent body comprises a branch opening communicated with the branch stent body, the branch stent body comprises a first end and a second end which are opposite, the first end is connected to the branch opening, and the second end is connected to the branch opening. The branch support comprises an adjusting section close to the first end and a supporting section close to the second end, the branch support comprises a first circumferential supporting piece arranged in the circumferential direction of the branch support, and the first circumferential supporting piece is arranged at the joint of the adjusting section and the supporting section. According to the covered stent, the first circumferential supporting piece is arranged at the joint of the adjusting section and the supporting section of the branch stent, so that supporting force is conveniently provided between the adjusting section and the supporting section, a covering film at the near end of the supporting section is pulled, and the annular shape of the near end of the supporting section is better kept.

The present disclosure relates to the technical field of medical instruments. Provided is an aortic endovascular structure and blood flow whole-course remodeling device, comprising a sealing portion and a main body. When the sealing portion is arranged in a first tube portion of the main body, the sealing portion arranged on the inner wall of the first tube portion can seal a vascular rupture or another lesion at the position thereof, thereby preventing the flow of blood. In this way, the aortic endovascular structure and blood flow whole-course remodeling device does not rely on the membrane structure of covered stents in the prior art, and thus has improved durability, and also avoids the risk of membrane structure rupture. As the mesh structure of a mesh portion, especially a braided one, allows the shape of the mesh portion to change when subjected to an external force, the aortic endovascular structure and blood flow whole-course remodeling device has good compliance, enabling shearing and damage to vascular walls to be reduced.

The invention discloses a lantern-shaped variable-diameter transcatheter artificial mitral valve stent, and belongs to the technical field of medical instruments. Comprising a lantern-shaped outer stent body and an outer stent covering film, the outer stent covering film is arranged close to an aorta side semi-open window, and the outer stent covering film is arranged close to the aorta side semi-open window. The grid lantern-shaped support body comprises an atrial side umbrella disc, a ventricular side variable diameter structure and a negative pressure suction cup which is connected with the atrial side umbrella disc and the ventricular side variable diameter structure and used for strengthening anchoring. The valve inner frame comprises a grid barrel-shaped inner frame body and an inner frame covering film, and the inner side of the inner frame body is connected with an artificial valve leaflet. By means of the lantern-shaped design of the outer stent and the valve ring suction cup for assisting anchoring, the problem that an artificial mitral valve replaced through a catheter is difficult to anchor is solved, and the problem that a left ventricular outflow tract is prone to being blocked after a covered stent is implanted is solved through the design that the single side of the dynamically-changeable valve outer stent is not covered with a film.

The invention discloses a blood flow maintaining device, an aorta covered stent system and a windowing method of an aorta covered stent, the blood flow maintaining device comprises a conveying sheath and a blood flow maintaining net basket, the conveying sheath comprises a sheath tube, and the blood flow maintaining net basket comprises a net basket and a pushing assembly; the net basket has an unfolded state and a folded state; the pushing assembly is connected with the net basket, and the pushing assembly is used for pushing the net basket in the sheathing canal; when the mesh basket is in an unfolded state after being released outwards from the far-end opening of the sheath tube, the mesh basket is suitable for supporting the aorta covered stent and forming a covered stent external blood flow channel on the outer side of the aorta covered stent. When the blood flow maintaining net basket is applied to an aortic arch intracavity isolation treatment operation, the net basket can ensure that the blood flow of each branch is not interrupted before branch windowing is completed, the requirements for hospital conditions and the operation level of an operator are reduced, the operation time is shortened, meanwhile, postoperative complications are reduced, and operation popularization is facilitated.

The invention relates to a plugging stent and a plugging system.The plugging stent comprises a covered stent and a one-way valve component, the one-way valve component is arranged in a hollow cavity or / and an extension cavity of the covered stent, the one-way valve component comprises a connecting section and a free section which are connected, and the end, away from the free section, of the connecting section is connected to the covered stent in the circumferential direction; the plugging support comprises a developing part, a far end opening of the connecting section is in a long strip shape, the long strip shape comprises a long shaft and a short shaft, and the axial cross section defined by the two ends of the long shaft is a first cross section; the developing part comprises a first developing part and a second developing part, and a developing point connecting line passing through the first developing part and the second developing part is approximately parallel to the diameter in the radial section of the covered stent. The plugging stent provided by the invention has a better plugging effect, prevents blood from flowing back, and avoids continuous expansion and even rupture of a false cavity.

A covered stent and a preparation method thereof. The covered stent includes an inner-layer membrane, an outer-layer membrane, and a supporting framework located between the inner-layer membrane and the outer-layer membrane. The areas of the inner-layer membrane and the outer-layer membrane in supporting framework grids are mutually bonded. No extra adhesive is introduced into the covered stent, subsequent heating and melting are not needed to bond the inner-layer membrane and the outer-layer membrane of the supporting framework, and the covered stent has the advantages of being thin in membrane, small in pressing and holding outer diameter, high in bonding strength of the inner-layer membrane and the outer-layer membrane, good in mechanical property of the membranes and the like.

The invention discloses a covered stent and a balloon dilatation covered stent system, and relates to the technical field of medical instruments.The covered stent comprises a stent body connected through a tubular covering film, and the covered stent has a non-load state with the zero compression diameter and a load state which has the compression rate relative to the non-load state and is used for supporting blood vessels to recover blood flow; when the compression ratio of the covered stent is 10%, the numerical range of the radial supporting force of the covered stent is 2.0 N / mm-6. 0N / mm. The balloon dilatation covered stent system comprises an elastic pipe sleeve, a balloon, a mandrel and a covered stent, the covered stent, the elastic pipe sleeve, the balloon and the mandrel are sequentially arranged from outside to inside in a sleeving mode, and the two ends of the balloon are sealed with the mandrel; the near end of the elastic tube sleeve is fixedly connected with the mandrel or the near end of the balloon; and the far end of the elastic tube sleeve movably sleeves the balloon. The covered stent can provide moderate support for blood vessels, and the problems of lumen restenosis and stent collapse after an existing covered stent is implanted can be effectively solved.

The invention provides a covered stent which comprises a main stent body with a tubular main body and an embedded stent body, and the main stent body comprises a near-end section, a tumor cavity section and a far-end section in the axial direction; the tumor cavity section comprises an internal iliac channel and an external iliac channel which are arranged in the radial direction, the external iliac channel is communicated with the far-end section, an opening is formed in the far end of the internal iliac channel, an embedded support is arranged in the internal iliac channel, and the embedded support is arranged to provide an implantation channel of the internal iliac support, so that the internal iliac support has better anchoring property; wherein the total supporting strength of the internal iliac channel and the embedded stent is smaller than the supporting strength of the external iliac channel, and the external iliac channel has higher supporting strength, so that when the covered stent is pressed, the internal iliac channel part deforms prior to the external iliac channel part, and the external iliac channel part can keep a better channel form and is prevented from being pressed and blocked; and it is ensured that blood smoothly passes through the external iliac channel part.

The utility model provides an integrated stent-type artificial blood vessel which comprises an artificial blood vessel part comprising an artificial blood vessel main branch used for being arranged corresponding to an ascending aorta of a human body; the covered stent comprises a covered stent trunk and a left subclavian artery branch arranged beside the covered stent trunk and communicated with the covered stent trunk; the bendable connecting tube section is arranged between the artificial blood vessel part and the covered stent, the bendable connecting tube section comprises a main tube section and a side short tubular joint which is arranged on the side of the main tube section and communicated with the main tube section, and in the main blood flow direction of the artificial blood vessel, the near end of the main tube section is connected with the main branch of the artificial blood vessel; the far end of the main pipe section is connected with the near end of the artificial blood vessel main branch, and the axial height of the side short pipe-shaped connector is smaller than that of the left subclavian artery branch. The number of branch arteries needing to be dissociated in an operation is reduced, then dissociation anastomosis time is saved, circulation stopping time is shortened, protection on brain tissue is enhanced, and postoperative rehabilitation of a patient is facilitated.

The present invention relates to the technical field of medical devices, and discloses a special covered stent for in situ fenestration of an aortic arch, wherein the proximal end of the aortic covered stent is provided with 2-3 Z-wave stent rings (proximal Z-wave stent ring group) and 1 proximal small-wave stent ring, the distal end is provided with 3-4 Z-wave stent rings (distal Z-wave stent ring group), the middle section of the aortic covered stent is provided with a saddle-shaped metal stent ring, the aortic stent is fully covered with a coating, and the coating has a grid-like reinforcing wire. The special covered stent for in situ fenestration of an aortic arch mainly provides a special covered stent for in situ fenestration for in situ fenestration technology, which improves the success rate of fenestration and reduces the probability of stenosis caused by compression of the branch stent by the angle of the metal ring.

An integrated stent-type artificial blood vessel, comprising: an artificial blood vessel portion (1), wherein the artificial blood vessel portion (1) comprises a main artificial blood vessel trunk (11), and the main artificial blood vessel trunk (11) is configured to be arranged corresponding to an ascending aorta of a human body; a covered stent (2), wherein the covered stent (2) comprises a main covered stent trunk (21) and a left subclavian artery branch trunk (22) provided on the side of and in communication with the main covered stent trunk (21); and a bendable connecting tube segment (3), provided between the artificial blood vessel portion (1) and the covered stent (2), wherein the bendable connecting tube segment (3) comprises a main tube segment (31) and a short side tubular connector (32) provided beside and in communication with the main tube segment (31). In a primary blood flow direction of the artificial blood vessel, the proximal end of the main tube segment (31) is connected to the main artificial blood vessel trunk (11), the distal end of the main tube segment (31) is connected to the proximal end of the main covered stent trunk (21), and the short side tubular connector (32) is connected to a short covered tubular stent (23).

The invention is suitable for the field of medical instruments, and provides a stent binding structure and a covered stent system. The stent binding structure comprises a tail end, a binding ring, a lock catch assembly and a stay wire end, the tail end comprises a uniknot ring with a first free section, the lock catch assembly is connected with the tail end, the binding ring and the stay wire end, the stay wire end is provided with a second free end, and the binding ring binds the covered stent. The binding rings and the lock catches can be sequentially released and released into non-knotted threads connected with the second free section, the situations of clamping stagnation and incapability of taking out are avoided, the problem that the threads are difficult to take due to the fact that the threads are wound on the covered stent to form spiral threads during thread removal can be effectively solved, no foreign matter is left in the body after an operation, and the success rate and the efficiency of the operation can be improved.

The invention discloses a preparation method of a stem cell exosome chitosan compound covered stent. The stem cell exosome chitosan compound comprises a stem cell exosome and a chitosan compound. In the stem cell exosome and chitosan compound, the mass percent of chitosan is 3%-10%, and the number of the stem cell exosomes is 109-1011. Compared with a traditional covered stent, the covered material provided by the invention can resist inflammation, inhibit bacteria, protect vascular endothelial cells covered by the stent, promote tissue repair, prevent tissue adhesion, prevent fibrosis and inhibit exclusion reaction and autoimmunity.

Covered stents may be coated with or otherwise include a drug eluting composition. An illustrative stent may comprise an elongated tubular body having a strut framework defining a plurality of open cells. A polymeric coating may be disposed on a surface of the elongated tubular body and extending across the plurality of open cells and a first drug coating composition disposed on a surface of the polymeric coating.

Provided in the present invention are a covered stent and a delivery system. The covered stent comprises a main stent having a tubular main body and an embedded stent. The main stent comprises a proximal section, an aneurysm sac section and a distal section in the axial direction. The aneurysm sac section comprises a first channel and a second channel which are arranged in the radial direction, the second channel communicating with the distal section, and the first channel being provided with an opening at the distal end and being internally provided with the embedded stent. The provision of the embedded stent provides a channel for implantation of an internal iliac artery stent, so as to enable the internal iliac artery stent to have better anchoring performance, wherein the total scaffolding strength of the first channel and the embedded stent is smaller than that of the second channel, and since the second channel has the higher scaffolding strength, the first channel deforms before the second channel when the covered stent is subjected to compression, so as to enable the second channel to keep a better channel form, thereby preventing compression-induced occlusion and ensuring blood to smoothly pass through the second channel.

The invention relates to the technical field of medical instruments, and discloses a stent system which comprises a covered stent and an adjusting structure, the covered stent comprises a first side and a second side in the circumferential direction, the adjusting structure comprises a first adjusting piece, a locking sleeve and a limiting buckle, the limiting buckle is connected with the far end of the first side, an opening is formed in the side face of the far end of the locking sleeve, and the opening is communicated with the first adjusting piece. The first adjusting piece extends in the cavity of the locking sleeve in the axial direction and penetrates through the limiting ring buckle at the opening, so that the limiting ring buckle cannot slide out of the first adjusting piece when pulled. The limiting buckle is locked under the matching action of the first adjusting piece and the locking sleeve, and when the covered stent is released into the blood vessel, due to the fact that the limiting buckle is connected with the far end of the first side, the position of the far end of the first side can be adjusted by pulling the limiting buckle, the first side of the covered stent is attached to the blood vessel wall, and the covered stent is released. Therefore, the included angle between the first side and the blood vessel wall can be reduced or eliminated, and the possibility of internal leakage of the covered stent is reduced.

The invention provides a covered stent windowing device which comprises a sheathing canal, the sheathing canal comprises an adjustable bending section and a main body section, the adjustable bending section is arranged at the far end of the main body section, and a side hole is formed in the side wall, close to the adjustable bending section, of the far end of the main body section; the puncture assembly is arranged in the sheath tube and extends in the axis direction of the sheath tube; in a working state, at least part of the far end of the puncture assembly penetrates out of the side hole, and a window is formed in the covered stent. According to the scheme, various problems caused by the fact that the puncture assembly stretches out of the far-end port of the sheathing canal to conduct windowing operation are effectively avoided, the windowing position of the puncture assembly on the covered stent can be accurately positioned, the windowing position precision and the windowing success rate are improved, the use difficulty of an operator is reduced, and the windowing operation process does not need to be repeatedly adjusted.

The invention relates to an intracavity implantation system which comprises an intracavity prosthesis, the intracavity prosthesis has a radial expansion state and a radial contraction state, the intracavity prosthesis comprises a covered stent, a valve prosthesis and a flexible connecting pipe, the covered stent is of a tubular structure and comprises a main body section and a reducing section which are communicated with each other, and the valve prosthesis is arranged in the main body section. The main body section and the reducing section are arranged in the axial direction of the covered stent, the cross section area of the near end of the reducing section is smaller than that of the far end of the reducing section, the covered stent is further provided with a window penetrating through the side wall of the covered stent, and at least part of the area of the window is located in the reducing section; the valve prosthesis comprises a valve support and an artificial valve leaflet connected to the interior of the valve support. The flexible connecting pipe is of a tubular structure defined by a flexible film, the far end of the flexible connecting pipe is connected with the reducing section, the near end of the flexible connecting pipe is connected with the valve prosthesis, and the two axial ends of the flexible connecting pipe are communicated with the covered stent and the valve prosthesis respectively. In the implanting process of the endoluminal prosthesis, the relative position of the valve prosthesis and the covered stent can be adjusted according to the lumen structure, and the endoluminal prosthesis can better adapt to various lumen structures. In addition, due to the arrangement of the flexible connecting pipe, the risk that the far end of the valve prosthesis is driven to expand and deform due to expansion of the covered stent can be reduced, force generated in the expansion process of the valve prosthesis is not prone to being transmitted to the covered stent, and therefore the risk that coronary blood flow is blocked due to expansion of the near end of the covered stent can be reduced.

The invention relates to a stent system which comprises a tubular stent, a conveyor, a first stay wire and a second stay wire, the stent comprises a covered stent and a bare stent, the bare stent is arranged at the far end of the covered stent, one end of the first stay wire is connected with the conveyor, and the other end of the first stay wire penetrates out of the conveyor; the first stay wire extends in the circumferential direction of the bare stent after passing through the covered stent and is detachably connected with the bare stent, and the first stay wire moves to drive the bare stent to retract or expand; one end of the second wire drawing wire is connected with the near end side of the conveyor, the other end of the second wire drawing wire penetrates out of the conveyor, the covered stent extends in the circumferential direction of the far end of the covered stent and is detachably connected with the covered stent, and the movement of the second wire drawing wire can drive part of the covered stent to retract or expand. According to the stent system, after the stent is released, the stent can be shrunk again, and the stent can be positioned in the blood vessel again so as to be accurately released at the target position.

The invention discloses a windowing covered stent blood vessel conveying system, and belongs to the field of medical instruments, the windowing covered stent blood vessel conveying system comprises a fixing rod, a membrane sleeve, a fixator and a handle assembly, and the fixing rod is provided with a convex part used for being connected with a windowing covered stent blood vessel in a matched mode; the membrane sleeve is used for covering a windowing covered stent blood vessel, and a plurality of wire penetrating holes are formed in the two sides of the membrane sleeve. The fixer is flexibly connected with the fixing rod; according to the fixing device, connection with the windowing covered stent blood vessel is achieved through the fixing rod and the fixing device, excessive shortening of the windowing covered stent blood vessel can be prevented in the constriction and release process, the released windowing covered stent blood vessel is distributed more evenly, and in addition, the fixing device can be used for fixing the windowing covered stent blood vessel. By means of the branch blood vessel positioner, accurate positioning of the branch blood vessel can be achieved conveniently, and the problem that the branch blood vessel is difficult to align is solved.

The covered stent comprises a plurality of stent rings distributed in the axial direction and a covering film, and the covering film comprises a first part and a second part; the stent ring comprises a constraint state and a release state, in the constraint state, the stent ring comprises a constraint release line, the constraint release line stitches the two ends, close to the first part, of the second part, so that a compression space is defined by the first part, and the stent ring is compressed and contained in the compression space in the radial direction; and in the release state, the stent ring compressed in the compression space is expanded and is attached to the second part. Interference between the windowing position and the metal stent can be avoided, and interference between the branch artery covered stent system and the metal stent of the covered stent in the aorta in the placing process is avoided; enough supporting force can be provided in the arch area, and the covered stent in the branch blood vessel is prevented from moving towards the inside of the aortic lumen while the aortic lumen is kept unobstructed.

The present invention proposes a multi-branch stent for aortic dissection distal aneurysm zoning, belonging to the field of medical device technology. It includes a main covered stent, which is composed of a covering and a main stent. The main covered stent is sequentially arranged from one end to the other end as an upper half, a waist transition section and a lower half; the upper and lower parts of the upper half in the vertical direction are respectively a soft zone and a hard zone; the upper and lower parts of the lower half in the vertical direction are respectively a hard zone and a soft zone; the upper and lower parts are respectively provided with two embedded branch stents; the embedded branch stent in the upper half is used to reconstruct the celiac trunk and the superior mesenteric artery, and the embedded branch stent in the lower half is used to reconstruct the bilateral renal arteries. The present invention increases the adaptability of the anchoring areas at both ends of the main covered stent to the blood vessels, prevents the rupture of the inner membrane sheet of the distal rupture, improves the adhesion of the main covered stent to the tube wall, reduces the incidence of type I internal leakage, reduces the incidence of new stent-induced ruptures after surgery, and can reconstruct visceral arteries at the same time.