403 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 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.

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.

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 invention provides a covered stent system which comprises a main covered stent comprising a positioning assembly and a windowing assembly, the windowing assembly comprises a first opening and a second opening, a first reinforcing structure maintains the first opening, and a second reinforcing structure maintains the second opening; the branch covered stent comprises a proximal end limiting stent and a telecentric section limiting stent; when the branch covered stent is connected with the main covered stent, the proximal section limiting stent and the telecentric section limiting stent are located on the two sides of the second reinforcing structure and are matched for limiting, and the sealing areas of the branch covered stent and the main covered stent are tightly attached to form sealed connection. Precise positioning, stable anchoring and effective sealing of the branch covered stent are achieved, meanwhile, the branch covered stent can be effectively prevented from protruding out of a main cavity, and therefore the risks of twisting, narrowing and blocking of the branch covered stent are reduced; the channel operability of subsequent intervention of the main cavity and the branch cavity is guaranteed; and the branch covered stent is prevented from blocking an opening adjacent to the branch artery.

The invention provides a covered stent. The covered stent comprises a cutting stent and a covering film partially covering the cutting stent. The cutting support comprises a plurality of wave rings which are sequentially connected in the axial direction of the wave rings, and each wave ring comprises a plurality of foundation structures which are sequentially connected in the circumferential direction. The plurality of wave rings comprise z-shaped wave rings and double-n-shaped wave rings, and the z-shaped wave rings and the double-n-shaped wave rings are alternately arranged in the axial direction of the cutting support; the basic structure in the z-shaped wave ring is a first basic structure; the basic structure in the double-n-shaped wave ring is a second basic structure, and the second basic structure is a closed grid and is formed by butt joint of two n-shaped wave rods in the circumferential direction in a face-to-face mode. The covered stent has enough supporting performance, flexibility and adherence, internal leakage can be prevented, the thickness of the stent can be well controlled, and the covered stent can be conveyed and enter smaller blood vessels.

The invention relates to a conveying device. Comprising a conveying rod, the conveying rod is provided with a sliding cavity and a communicating structure, the communicating structure communicates with the sliding cavity and the outside, and the conveying rod is used for being arranged in a covered stent in a penetrating mode; the sliding rod is in sliding fit with the sliding cavity; and the clamping jaw is fixed on one of the conveying rod and the sliding rod and can slide relative to the other one of the conveying rod and the sliding rod, and the clamping jaw can extend into or retreat from the communicating structure in the sliding cavity so as to fix or release the covered stent. Due to the fact that the clamping jaw can fix the far end of the covered stent, when other parts of the covered stent are in the release state and attached to the inner wall of the blood vessel, the covered stent is in the semi-release state, and the blood blocking function can be achieved through the combined action of the conveying device and the covered stent in the semi-release state; and blood is effectively prevented from entering the covered stent from the far end. Therefore, the safety and the working efficiency of the operation can be improved.

The utility model discloses a splenic artery blood flow limiting support, and particularly relates to the technical field of medical instruments, the splenic artery blood flow limiting support comprises a supporting support and a flow limiting support, the supporting support is sleeved outside the flow limiting support, two ends of the flow limiting support are fixedly connected with the inner side wall of the supporting support, the flow limiting support is a covered stent, and the flow limiting support comprises a contraction section and an expansion section. The contraction section and the expansion section are fixedly connected and communicated, and splenic artery blood flow in the supporting stent flows in from the contraction section and flows out from the expansion section. The splenic artery embolism postoperative spleen blood perfusion can be reduced, and the recurrence of splenic hyperfunction is reduced.

The invention discloses a film-covered double-layer stent, and belongs to the technical field of medical instruments. Comprising a first stent layer and a second stent layer, the first stent layer and the second stent layer are each of a self-expanding structure, the second stent layer is sleeved with the first stent layer, and a covering film is arranged between the first stent layer and the second stent layer; the length and the position of the covering film are adjustable, at least one lead is arranged on the covering film and used for adjusting the position of the covering film in the stent, a release point is arranged between the lead and the covering film, and the lead can be separated from the covering film and withdrawn after adjustment is completed. The double-layer stent inherits the advantages that a self-expanding stent is easy to convey, good in vascular shape compliance and the like, meanwhile, the double-layer stent can firmly fix the covering film between the double-layer stent, the phenomenon of inner leakage of the covered stent caused by untight combination of the covering film and the stent can be effectively reduced, meanwhile, the covering film length and the covering film position of the stent are adjustable, and the stent is convenient to use. Therefore, the possibility that the covered stent blocks the blood vessel through the branch is greatly reduced.

The invention provides a covered stent and a stent system.The covered stent comprises a main stent body and a wrapping part, 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, and the wrapping part is connected to one side of the main stent body; the wrapping part wraps the main body stent in a releasable mode so that the main body stent can be compressed or unconstrained in the radial direction, the width of a certain position of the wrapping part is defined as W, and the perimeter of the covered stent at the position corresponding to the width W of the wrapping part is defined as C when the covered stent is in a natural expansion state, the relation between W and C meets the condition that W is smaller than or equal to C / 4. W is less than or equal to C / 4, so that the semi-constraint degree of the covered stent can be ensured, the stent can be repeatedly adjusted in the axial direction when being implanted into a blood vessel, and meanwhile, a channel convenient for selecting a branch blood vessel is provided when the covered stent is radially compressed by a wrapping piece, so that the movable space of the channel in the radial direction is not too large.

The invention relates to a conveyor and a conveying system.The conveyor comprises an inner sheath core, an outer sheath core, an outer sheath tube, a conveying handle, a restraining piece and a fixing anchor which are sequentially connected in a sleeved mode, and the near end of the inner sheath core, the near end of the outer sheath core and the near end of the outer sheath tube are all connected with the conveying handle so that the inner sheath core, the outer sheath core and the outer sheath tube can axially and relatively move under adjustment of the conveying handle; the restraining piece is fixed to the far end of the inner sheath core, and the fixing anchor is connected with the far end of the outer sheath core so that at least part of the restraining piece can be inserted into the restraining piece when the inner sheath core and the outer sheath core move relative to each other in the axial direction. The fixing anchor comprises a main body part and a plurality of anchor hooks, and limiting grooves are formed in the positions, on the near-end sides of the anchor hooks, of the outer wall of the main body part. According to the conveyor, before the bare stent is separated from the anchor hook, the wave rod of the bare stent is radially compressed through the restraining piece in the relative axial movement process of the inner sheath core and the outer sheath core, so that the wave rod can be contained in the limiting groove again, the main body stent connected with the wave rod is driven to be radially compressed, and in the release debugging process, the main body stent can be released. The shape and the position of the covered stent can be adjusted.

The covered stent dip-coating device comprises a bin body, a dip-coating bin, a pre-curing bin and a curing bin are sequentially arranged in the bin body from front to back, and a first movable partition plate and a second movable partition plate are correspondingly arranged between the dip-coating bin and the pre-curing bin and between the pre-curing bin and the curing bin respectively. A front bin door and a rear bin door which can be opened and closed are correspondingly arranged on the front side wall and the rear side wall of the bin body, a first translation mechanism and a second translation mechanism are arranged on the upper portion of the dip-coating bin and the upper portion of the curing bin respectively, and a first rotating mechanism, a second rotating mechanism and a third rotating mechanism which are used for clamping and transferring lining rods are correspondingly arranged on the upper portions of the dip-coating bin, the pre-curing bin and the curing bin. The first translation mechanism and the second translation mechanism are respectively used for translating the first rotating mechanism and the third rotating mechanism in the front-back direction; clamping mechanisms for clamping lining rods are respectively arranged on the first rotating mechanism, the second rotating mechanism and the third rotating mechanism; and a liftable dip-coating liquid containing mechanism is arranged at the bottom of the dip-coating bin. The dip-coating device has the advantages of being high in automation degree, good in dip-coating film covering effect, high in production efficiency and good in safety.

The application provides an aortic covered stent, an in-situ fenestration instrument and a covered stent manufacturing method, and relates to the technical field of medical instruments.The aortic covered stent comprises a stent body and a covering film covering the stent body, the covering film in the fenestration area is divided into multiple layers and at least comprises an inner layer covering film and an outer layer covering film, and the inner layer covering film and the outer layer covering film are arranged in layers from the inner layer to the outer layer. The inner layer covering film and the outer layer covering film can adopt a lower weaving density, are easy to be punctured to break the film and expand the opening, and a sealing ring can be arranged between the inner layer covering film and the outer layer covering film; the branch stent, the inner layer covering film and the outer layer covering film are attached through surface contact from the inner layer to the outer layer, and the sealing ring is pressed between the inner layer covering film and the outer layer covering film, so that the sealing property is improved and the risk of internal leakage is reduced.

An endovascular branch coupler stent graft includes a tubular stent assembly defining a central opening and four branch channels disposed in the central opening and attached to the tubular stent assembly. The four branch channel extends along the length of tubular stent assembly. Each branch channel is configured to receive a covered stent for catheterizing a branch vessel. Similarly, the central opening configured to receive a primary stent graft for reinforcing weakened sections of a subject's aorta.