CN211325890U

CN211325890U - Preset windowing covered stent and preset windowing covered stent system

Info

Publication number: CN211325890U
Application number: CN201921438709.4U
Authority: CN
Inventors: 陈兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-08-25
Anticipated expiration: 2029-08-30

Abstract

The utility model provides a preset tectorial membrane support of windowing, it includes the main part tectorial membrane and is fixed in the support chassis of main part tectorial membrane, the wall of main part tectorial membrane sets up at least one and presets the district of windowing, it sets up sealing connection in to predetermine the district of windowing the lid window tectorial membrane of main part tectorial membrane, lid window tectorial membrane is followed remove the back on the main part tectorial membrane, with form open window form on the main part tectorial membrane, can insert branch's blood vessel. The utility model discloses a preset tectorial membrane support of windowing after implanting the artery, if need when putting through branch's blood vessel on presetting the tectorial membrane support of windowing, only need directly take out the lid window tectorial membrane on the main part tectorial membrane through special recovery unit, accomplish the operation of the internal windowing promptly, convenient to use, easy operation has reduced the risk. The utility model also provides a be provided with predetermine tectorial membrane support system of windowing of predetermineeing tectorial membrane support of windowing.

Description

Preset windowing covered stent and preset windowing covered stent system

Technical Field

The utility model relates to an implantable vascular technical field especially relates to a predetermine tectorial membrane support of windowing and be provided with predetermine tectorial membrane support system of windowing of predetermineeing tectorial membrane support of windowing.

Background

At present, the vascular diseases can be treated by adopting minimally invasive intervention, and the method has small wound on patients, high safety and high effectiveness, so the method is determined by doctors and patients and becomes an important treatment method for the vascular diseases. The interventional therapy method is characterized in that a stent is implanted into a diseased blood vessel section of a patient by using a conveying system, and the implanted stent can support a blood vessel at a stenotic occlusion section, seal an expanded hemangioma-like structure or block a laceration of a blood vessel interlayer by expansion, so that the elastic retraction and the reshaping of the blood vessel are reduced, the blood flow of a lumen is kept smooth, and the effect of preventing restenosis is achieved. At present, most of the stents on the market are covered stents.

Most of the existing covered stents are cylindrical or truncated cone-shaped in overall appearance, and the covered stent is tubular and is uniformly distributed on the side wall. When in use, the covered membrane on the side wall of the stent is used for plugging a laceration, remodeling a true cavity, isolating an aortic dissection or an aortic aneurysm, reducing the pressure in a false cavity or the aneurysm and promoting the thrombosis. Generally, when the stent graft is released, a healthy blood vessel with at least 15 mm at the proximal end of the aorta rupture is required for anchoring the proximal end of the stent graft.

In practice, however, a large number of cases suggest that the proximal end of the diseased aortic region may not have 15 mm anchoring conditions, as exemplified by descending aortic pathologies: approximately 40% of patients have primary lesions of the descending aorta close to the left subclavian artery, at which time treatment with a stent graft inevitably covers the left subclavian artery. Covering the left subclavian artery may cause symptoms such as cerebral ischemia, spinal cord ischemia, left upper limb ischemia, etc.; on the other hand, the patient may receive other interventional treatment in the future, and covering the left subclavian artery can cause the access to be closed, and the interventional treatment is seriously influenced. The aortic stents on the market are permanent implants, and the aortic stents are taken out after implantation with high difficulty and risk. When the covered stent covers important blood vessel branches and a path needs to be reconstructed, a method of in-vivo in-situ windowing in an operation is mostly adopted, namely, a sharpened guide wire, various puncture needles, laser and the like are utilized to forcibly puncture the stent covering film, and then a balloon is utilized to expand and tear the stent covering film so as to reconstruct the branch blood vessels. The in vivo windowing operation is complex, inconvenient to control, and can damage the support structure, so that the risk is high; other methods include, for example, in vitro pre-windowing by removing the stent during the procedure and manually cutting, firing or sewing a specific window locally by the operator based on pre-acquired data, installing the stent back into the body, and requiring the windowed body to be accurately directed to the branch vessel to be preserved. Such techniques destroy the integrity of the stent, are complex to operate and have high technical requirements and high risks. The pre-windowed or branched stent manufactured by a manufacturer has long processing time and high cost, and also needs to be accurately aligned when in operation, and is not suitable for a large number of clinical requirements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a preset tectorial membrane support of windowing, preset tectorial membrane support of windowing can make things convenient for internal windowing, provides more and can carry out the window of presetting of selecting according to the condition in the art, reduces operation time, reduces the risk, reduces the operation expense.

In order to solve the technical problem, the utility model provides a preset tectorial membrane support of windowing, it includes the main part tectorial membrane and is fixed in the support chassis of main part tectorial membrane, the wall of main part tectorial membrane sets up at least one and predetermines the district of windowing, set up sealing connection in the district of windowing in advance the lid window tectorial membrane of main part tectorial membrane, the lid window tectorial membrane is followed remove the back on the main part tectorial membrane, in order form the windowing on the main part tectorial membrane.

The utility model also provides a preset tectorial membrane support system of windowing, including presetting tectorial membrane support of windowing and conveyer, it includes the main part tectorial membrane and is fixed in to preset tectorial membrane support of windowing the support chassis of main part tectorial membrane, the wall of main part tectorial membrane sets up an at least district of windowing in advance, set up sealing connection in the district of windowing in advance the lid window tectorial membrane of main part tectorial membrane, the lid window tectorial membrane is followed remove the back in the main part tectorial membrane, with form the windowing on the main part tectorial membrane, the support is including removing the unlocking device of lid window tectorial membrane, be provided with the forceps holder structure of connecting unlocking device on the conveyer.

The utility model provides a predetermine fenestration tectorial membrane support's pre-fenestration district is provided with sealing connection in the lid window tectorial membrane of main part tectorial membrane, when adopting recovery unit will cover the window tectorial membrane and remove the back from the main part tectorial membrane, forms the windowing in the pre-fenestration district of main part tectorial membrane. Therefore, the utility model discloses a predetermine tectorial membrane support of windowing after implanting the artery, if need when windowing on predetermine tectorial membrane support of windowing, only need directly take out the lid window tectorial membrane of the relevant position on the main part tectorial membrane through recovery unit, accomplish the operation of windowing in the body promptly, convenient to use, easy operation has reduced the risk.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a stent graft with preset fenestration provided by a first embodiment of the present invention.

Fig. 2 is an enlarged view of a portion II in fig. 1.

FIG. 3 is a schematic view of the pre-fenestrated stent graft of FIG. 1 after fenestration.

Fig. 4 is a schematic view of a partial structure of a stent graft with preset fenestrations according to a second embodiment of the present invention.

Fig. 5 is a schematic view of a partial structure of a stent graft with preset fenestrations according to a third embodiment of the present invention.

Fig. 6 is a schematic view of a partial structure of a stent graft with preset fenestrations according to a fourth embodiment of the present invention.

Fig. 7 is a schematic structural view of a stent graft with preset fenestration provided by a fifth embodiment of the present invention.

Fig. 8 is an enlarged view of a portion VIII in fig. 7.

Fig. 9 is a schematic partial structural view of a stent graft with preset fenestrations according to a sixth embodiment of the present invention.

Fig. 10 is a schematic structural view of a stent graft with preset fenestrations according to a seventh embodiment of the present invention.

Fig. 11 is an enlarged view of a portion XI in fig. 10.

Fig. 12 is a schematic partial structural view of a stent graft with preset fenestrations according to an eighth embodiment of the present invention.

Fig. 13 is a schematic partial structural view of a stent graft with preset fenestrations according to a ninth embodiment of the present invention.

Fig. 14 is a schematic partial structural view of a stent graft with preset fenestrations according to a tenth embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the protection scope of the present invention.

Furthermore, the following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced. Directional phrases used in this disclosure, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the direction of the appended figures and, therefore, are used in order to better and more clearly illustrate and understand the present invention without indicating or implying that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation and, therefore, should not be construed as limiting the invention.

Orientation definition: for clarity of description, in the following, an end close to the capturing device is referred to as a "proximal end", an end far from the capturing device is referred to as a "distal end", the axial direction refers to a direction in which a central axis of the device is located, the radial direction is a direction perpendicular to the central axis, and the circumferential direction is a circumferential direction around the central axis.

Referring to fig. 1 to 3, the present invention provides a pre-fenestration stent graft 100, which includes a tubular main body membrane 20 and a supporting framework 40 fixed on the wall surface of the main body membrane 20, wherein the wall surface of the main body membrane 20 is provided with at least one pre-fenestration area 22, the at least one pre-fenestration area 22 is provided with a cover window membrane 24 hermetically connected to the main body membrane 20, and the cover window membrane 24 is removed from the main body membrane 20 to form a fenestration 27 on the main body membrane 20.

The utility model provides a predetermine fenestration tectorial membrane support 100's pre-fenestration district 22 is provided with sealing connection in the lid window tectorial membrane 24 of main part tectorial membrane 20, removes the back when adopting recovery unit will cover window tectorial membrane 24 from main part tectorial membrane 20, forms fenestration 27 in the pre-fenestration district 22 of main part tectorial membrane 20. Therefore, the utility model discloses a predetermine tectorial membrane support 100 of windowing after implanting the artery, if need when predetermineeing the tectorial membrane support 100 of windowing, only need directly take out corresponding position lid window tectorial membrane 24 on the main part tectorial membrane 20 through recovery unit, accomplish the operation of windowing in the body promptly, easy operation, convenient to use has reduced the risk.

The main body coating 20 has a cylindrical tubular structure or a conical tubular structure, and the shape of the transverse end surface thereof is circular or elliptical in cooperation with the blood vessel. The supporting framework 40 is sewn or hot-pressed on the main body covering film 20, and the supporting framework 40 is formed by arranging a plurality of annular waveform supporting rods 42 along the axial direction of the main body covering film 20. Each annular waveform supporting rod 42 may be a high-wave supporting rod or a high-low-wave supporting rod, and the high-wave supporting rod means that the heights of the wave crests on the annular waveform supporting rod 42 are the same, and the heights of the wave troughs are also the same, that is, the wave crests and the wave troughs are respectively on the same plane. The high-low wave supporting rods mean that the heights of all wave crests on the annular wave supporting rods 42 are different, and the heights of all wave troughs can also be different.

In this embodiment, the supporting framework 40 includes a plurality of Z-shaped or sine-wave shaped annular wave-shaped supporting rods 42, and the annular wave-shaped supporting rods 42 are arranged at intervals along the axial direction of the main body coating film 20. Each of the zigzag or sinusoidal waveforms of each of the ring-shaped waveform supporting rods 42 includes a peak 421, a valley 423 and a connecting rod 425 connected between the peak 421 and the valley 423. Each of the annular waveform support rods 42 is woven from a superelastic nickel-titanium wire, and the wire diameter (i.e., diameter) of the superelastic nickel-titanium alloy wire is selected to be in the range of 0.3 mm to 0.55 mm. Each annular waveform supporting rod 42 is provided with a connecting sleeve, the connecting sleeve connects two opposite ends of the annular waveform supporting rod 42, namely, two opposite ends of the annular waveform supporting rod 42 are contained in the connecting sleeve, and then two ends of the nickel-titanium wire are fixed in the connecting sleeve through mechanical compression or welding.

Specifically, the annular waveform support rod 42 is woven by nickel titanium wires with the diameter of 0.5 mm, the number of the Z shapes or sine waves is 9, and the vertical height of the annular waveform support rod 42 is 8 mm-15 mm.

In other embodiments, the support armature 40 may be a woven mesh structure or a cut mesh structure.

The main body coating film 20 is made of dacron, PTFE, PET, or other polymer material, and the supporting frame 40 is sewn to the main body coating film 20 by sewing lines, i.e., the sewing lines may follow the waveform of each of the annular waveform supporting rods 42 along the entire supporting frame 40. The suture can also be used for suturing each annular wavy support rod 42 on the main body covering film 20 through a plurality of sewing knots which are distributed at unequal intervals.

The cover-window film 24 is made of dacron, PTFE, PET, or other polymer materials, the cover-window film 24 and the main body film 20 may be integrally formed, or the cover-window film 24 and the main body film 20 may be separately formed.

As shown in fig. 2, the cover window film 24 is formed integrally with the main body film 20, a non-through notch 25 is provided at the intersection of the cover window film 24 and the main body film 20, and the cover window film 24 can be separated from the main body film 20 along the notch 25. The score 25 is strong enough to isolate aortic lesions and lumens, particularly in aneurysms, without tearing the fenestration membrane 24, and the inward-outward blood flow impingement does not cause automatic opening of the score 25. Since the score 25 does not penetrate the inner cavity of the main body film 20 and the thickness of the film at the score 25 between the main body film 20 and the cover window film 24 is smaller than the thickness of both the main body film 20 and the cover window film 24, the strength of the score 25 is lower than that of the other positions of the main body film 20, and the cover window film 24 is easily detached from the main body film 20 along the score 25, thereby forming an opening 27 (shown in fig. 3) penetrating the inner cavity of the main body film 20 in the main body film 20.

In other embodiments, the intersection of the cover window covering film 24 and the body covering film 20 may also be provided as a monofilament continuous tear seam along which the cover window covering film 24 can be separated from the body covering film 20. The monofilament continuous tear-off suture can be completely opened by simply pulling the unlocking device of the suture line, and the covering film 24 with the cover is pulled out of the body together to form windowing operation.

The body cover film 20 is provided with a support ring 50 around the score 25. The support ring 50 is used to support the main body cover film 20 and facilitate separation of the cover window cover film 24 from the main body cover film 20. The score 25 or the monofilament continuous tear-off stitch may be configured in a circular, oval, rectangular or irregular shape, the support ring 50 extends along the score 25 to form at least one circle, and the area enclosed by the support ring 50 is greater than or equal to the area enclosed by the score 25.

In the present embodiment, the score 25 is circular, and the support ring 50 is a circular ring disposed around the score 25, and the diameter of the circular ring is slightly larger than that of the score 25.

In other embodiments, the support ring 50 may also overlap the score 25 to facilitate removal of the lid window film 24 from the body film 20.

The support ring 50 is made of a developing material, and during the in vivo fenestration operation on the main body cover film 20, the position of the support ring 50 can be clearly observed by an imaging device, that is, the support ring 50 near the notch 25 can be observed as an annular developing mechanism surrounding the notch 25 by one turn, and thus, the cover window cover film 24 can be more conveniently and rapidly moved from the main body cover film 20 to form the fenestration. The developing material can be made of a material with good X-ray opaque performance, strong corrosion resistance and good biocompatibility. The developer material includes, but is not limited to, gold, platinum, tantalum, osmium, rhenium, tungsten, iridium, rhodium, or alloys or composites of these metals. In this embodiment, the support ring 50 is a nitinol wire containing tantalum, the nitinol wire having a diameter of 0.10 mm to 0.40 mm.

Preferably, at least one circle of developing points or developing wires is arranged on the score 25. Specifically, a circle of developing points or developing wires is provided along the score 25 at the intersection of the main body coating film 20 and the cover window coating film 24. The circle of developing points can be fixed on the film by sewing, punching, inlaying or pasting; a circle of developing wires can be embedded in the covering film.

In other embodiments, at least one continuous or intermittent development spot is provided on the body cover film 20 along the circumference of the score 25. At least one circle of the developing points can be fixed on the main body covering film 20 in a sewing, stamping, embedding or sticking mode. Materials for the development sites include, but are not limited to, gold, platinum, tantalum, osmium, rhenium, tungsten, iridium, rhodium, and the like, or alloys or composites of these metals.

In this embodiment, the development sites are nickel-titanium alloy metal sheets containing tantalum. The ring shape formed by the developing points is consistent with the shape of the nick 25, therefore, at least one circle of developing points forms a connected or discontinuous ring-shaped developing mechanism, the position of at least one circle of developing points can be clearly observed through imaging equipment in the operation process, and the cover window film 24 can be more conveniently and quickly moved from the main body film 20 to form the window.

In other embodiments, the support ring 50 may not be made of a developing material, and at least one round of nitinol wire may be embedded in the outer surface of the support ring 50, or at least one round of nitinol wire may be adhered to the outer surface of the support ring 50. Preferably, the support ring 50 is wrapped with tantalum wire.

The support ring 50 is fixed to the main body cover film 20 by sewing, hot pressing, setting, or attaching.

When the windowing operation needs to be performed on the preset windowing tectorial membrane stent 100, the cover window tectorial membrane 24 is opened by adopting a special recovery device, and the opened cover window tectorial membrane 24 can fall off along the nick 25 because the strength of the nick 25 on the periphery of the cover window tectorial membrane 24 is smaller than that of other positions of the main body tectorial membrane 20; the lid cover film 24 is completely separated from the main body cover film 20, and the window 27 is formed. The same method can be used for a cover window film structure of the monofilament continuous tear-off suture sealing, and the cover window film 24 and the main body film 20 can be completely separated to form the fenestration 27 after the suture is pulled off.

In other embodiments, the support ring 50 may be omitted.

Referring to fig. 4, a preset fenestration covered stent provided by the second embodiment of the present invention has a structure similar to that of the first embodiment, except that: the outer surface of the cover window covering film 24 is provided with an unlocking structure 240 adjacent to the nick 25, and the cover window covering film 24 can be separated from the main body covering film 20 by pulling the unlocking structure 240. In this embodiment, the unlocking structure 240 is a pull ring, which is fixedly connected to the cover window covering film 24. The pull ring can be a ring body made of polyester fabric, PTFE, PET or other high polymer materials; or the ring body is made of materials such as gold, platinum, tantalum, osmium, rhenium, tungsten, iridium, rhodium and the like or alloy or composite of the metals.

Preferably, the unlocking structure 240 is a developing wire fixedly connected to the cover window covering film 24; more preferably, the developing wire passes through the outer surface of the cover window film 24 after being wound around one turn along the notch 25, and the pull ring is formed at the end of the developing wire.

When the windowing operation needs to be performed on the pre-windowing stent graft 100, the opening tool of the recovery device is used to connect the nick 25 at the position, adjacent to the unlocking structure 240, of the cover-window membrane 24, and the nick 25 at the periphery of the cover-window membrane 24 has strength smaller than that of other positions of the main body membrane 20, and the cover-window membrane 24 is torn along the nick 25, so that the cover-window membrane 24 and the main body membrane 20 are completely separated to form the windowing 27. Therefore, when the windowing operation is performed on the preset windowing covered stent 100, only the nicks 25 adjacent to the pull ring are punctured, and the cover window covered membrane 24 is taken out.

Referring to fig. 5, a preset fenestration stent graft provided by a third embodiment of the present invention has a structure similar to that of the first embodiment, except that: the main body coating 20 is provided with a through hole 221 in the pre-windowing region 22, the window covering coating 24 covers the through hole 221, and when the window covering coating 24 is taken down, the through hole 221 forms a window, namely the window is a branch opening of a blood vessel. The through hole 221 penetrates through the inner cavity of the main body coating film 20, and the through hole 221 can be circular, oval, rectangular or irregular; the area of the cover window coating film 24 is larger than the area of the through-hole 221 so that the cover window coating film 24 completely covers the through-hole 221.

The cover/window film 24 and the main body film 20 can be connected by a special adhesive, and the cover/window film 24 and the main body film 20 can be bonded by a physiological damage-free antitarnish agent through injection, so that the cover/window film 24 can be separated from the main body film 20.

The support ring 50 is provided around the through hole 221 of the main body coating film 20, and the edge of the cover window coating film 24 is located between the edge 221 of the through hole and the support ring 50.

When windowing operation needs to be performed on the preset windowing tectorial membrane stent 100, a recovery device is adopted to capture a window body after the cover window tectorial membrane is opened, and the cover window tectorial membrane 24 is attached to the main body tectorial membrane 20 only through weak medical glue, so that the cover window tectorial membrane 24 is easy to fall off from the main body tectorial membrane 20; then the cover window film 24 is clamped by the dropping part through the clamping device, and the cover window film 24 is torn off, so that the cover window film 24 is completely separated from the main body film 20 to form the open window 27.

Referring to fig. 6, a preset fenestration stent graft provided by the fourth embodiment of the present invention has a similar structure to that of the third embodiment, except that: the outer surface of the cover window covering film 24 is provided with an unlocking structure 240, and the cover window covering film 24 can be separated from the main body covering film 20 by pulling the unlocking structure 240. In this embodiment, the unlocking structure 240 is a pull ring, which is fixedly connected to the edge of the cover window covering film 24 adjacent to the edge and is a ring body made of terylene cloth, PTFE, PET or other high polymer materials; or a ring body made of materials such as, but not limited to, gold, platinum, tantalum, osmium, rhenium, tungsten, iridium, rhodium, or alloys or composites of these metals.

Preferably, the unlocking structure 240 is a developing wire fixedly connected to the edge of the cover window covering film 24; more preferably, the developing wire passes through the outer surface of the cover window coating film 24 after being wound around the edge of the cover window coating film 24 by one turn, and a pull ring is formed at the end of the developing wire.

When the windowing operation needs to be performed on the preset windowing covered stent 100, the recovery device is adopted to capture the cover-window covered membrane 24 close to the pull ring, and the cover-window covered membrane 24 is only attached to the main body covered membrane 20 through weak medical glue, so that the cover-window covered membrane 24 is easily loosened from the main body covered membrane 20; then insert through recovery device's recovery hook in the tab ring to tear off lid window tectorial membrane 24, make lid window tectorial membrane 24 and main part tectorial membrane 20 separate completely, in order to form the windowing, easy operation, convenient to use has reduced the risk.

Referring to fig. 7 and 8, a preset fenestration covered stent according to a fifth embodiment of the present invention has a similar structure to the first embodiment, except that: the edge of the cover window covering film 24 is connected with the main body covering film 20 through a sewing thread 29 in a sewing way, and after the head and the tail of the sewing thread 29 are connected through slipknots, the end of the sewing thread 29 is tied to form a rope socket 291. Specifically, after the seam 29 runs along the edge of the cover window film 24 and accompanies the entire cover window film 24, the living connection is made between the head and tail sections of the seam 29, and the end of the seam 29 is tied to form the rope socket 291.

In this embodiment, the cover/window film 24 and the main body film 20 can be separated by simply unraveling the stitches 29, and therefore, the support ring for support can be omitted.

At least one circle of developing points or developing wires are arranged on the edge of the cover window covering film 24, so that the positions of the at least one circle of developing points or developing wires can be clearly observed through imaging equipment in the operation process.

Preferably, the suture 29 is a developing silk, and the positions of the suture 29 and the rope loop 291 can be clearly observed through an imaging device during the operation.

When the windowing operation needs to be carried out on the preset windowing covered stent 100, the rope loop 29 is captured by adopting a recovery device, so that the knot of the suture 29 is untied; the rope sling 29 is pulled continuously, the suture 29 is gradually pulled out from the suture position until the suture structure is completely failed, the cover window film 24 is taken out so that the cover window film 24 is completely separated from the main body film 20, windowing is formed, the operation is simple, the use is convenient, and the risk is reduced.

Referring to fig. 9, a preset fenestration stent graft provided by a sixth embodiment of the present invention has a structure similar to that of the fifth embodiment, except that: the main body cover film 20 is provided with a support ring 50 around the edge of the cover window cover film 24. The support ring 50 is used to support the main body cover film 20 and facilitate separation of the cover window cover film 24 from the main body cover film 20. The support ring 50 extends along the edge of the cover window covering film 24 to enclose at least one circle, and the area enclosed by the support ring 50 is larger than or equal to the area enclosed by the cover window covering film 24.

At least one turn of developing dots or developing wires is provided on the support ring 50, or the support ring 50 is made of a developing material.

Referring to fig. 10 and 11, a preset fenestration stent graft according to a seventh embodiment of the present invention has a structure similar to that of the fifth embodiment, except that: the at least one annular corrugated strut 42 is provided with a positioning portion 426, and the at least one pre-opening area 22 is located in an area surrounded by the positioning portion 426.

The abdicating part 426 comprises two adjacent connecting rods 425 and a wave trough 423 between the two connecting rods 425, wherein each connecting rod 425 is bent to a side far away from the other connecting rod 425 to form the abdicating part 426 with other shapes such as a U shape, a semi-circle shape and the like.

The main body covering film 20 is provided with a through hole in the pre-windowing area 22 of the abdicating part 426, the edge of the cover window covering film 24 is connected with the edge of the through hole of the main body covering film 20 through a sewing thread 29 in a sewing way, and after the head and the tail of the sewing thread 29 are connected through slipknots, the tail end of the sewing thread 29 is tied to form a rope sleeve 291. Specifically, after the seam 29 runs along the edge of the cover window film 24 and accompanies the entire cover window film 24, the living connection is made between the head and tail sections of the seam 29, and the end of the seam 29 is tied to form the rope socket 291. The positioning portion 426 not only prevents the window from being blocked by the annular waveform supporting rod 42; since the relief portion 426 supports the main body cover film 20, a support ring is not required to be provided around the window of the main body cover film 20.

In other embodiments, the offset 426 includes two adjacent bars 425 and a peak 421 between the two bars 425, and each bar 425 is bent away from the opposite bar 425 to form an offset portion with an inverted U-shape or a semi-circular shape.

Referring to fig. 12, a preset fenestration stent graft provided by the eighth embodiment of the present invention has a structure similar to that of the seventh embodiment, except that: the cover window film 24 is integrally formed with the main body film 20, specifically, a non-through notch 25 is provided at the intersection of the cover window film 24 and the main body film 20 in the pre-windowing region 22, and the cover window film 24 can be separated from the main body film 20 along the notch 25. The thickness of the film at the score 25 between the main body film 20 and the cover window film 24 is smaller than both the main body film 20 and the cover window film 24, and therefore the strength at the score 25 is lower than that at other positions of the main body film 20. At least one circle of developing points or developing wires are arranged on the nicks 25.

Referring to fig. 13, a preset fenestration stent graft provided by the ninth embodiment of the present invention has a structure similar to that of the eighth embodiment, except that: the outer surface of the cover window covering film 24 is provided with an unlocking structure 240 adjacent to the nick 25, and the cover window covering film 24 can be separated from the main body covering film 20 by pulling the unlocking structure 240. In this embodiment, the unlocking structure 240 is a pull ring. Preferably, the unlocking structure 240 is a developing wire fixedly connected to the cover window covering film 24; more preferably, the developing wire passes through the outer surface of the cover window film 24 after being wound around the notch 25 by one turn, and a pull ring is formed at the end of the developing wire.

When the windowing operation needs to be performed on the preset windowing tectorial membrane bracket 100, a puncture tool of the recovery device is adopted to puncture at least the nick 25 of the cover window tectorial membrane 24 adjacent to the pull ring, so that the cover window tectorial membrane 24 adjacent to the pull ring is loosened along the nick 25; then insert the tab ring through recovery hook of recovery unit to tear lid window tectorial membrane 24 off, make lid window tectorial membrane 24 and main part tectorial membrane 20 separate completely, form the windowing, easy operation, convenient to use has reduced the risk.

Referring to fig. 14, a preset fenestration stent graft provided by the tenth embodiment of the present invention has a structure similar to that of the ninth embodiment, except that: the cover window film 24 and the main body film 20 may be made of the same high-molecular material or different materials. The main body coating 20 is provided with a through hole 221 in the pre-windowing region 22, the window covering coating 24 covers the through hole 221, and the through hole 221 forms a windowing after the window covering coating 24 is removed. The area of the cover window coating film 24 is larger than the area of the through-hole 221 so that the cover window coating film 24 completely covers the through-hole 221.

The cover/window covering film 24 and the main body covering film 20 can be connected by medical glue with weak viscosity so as to facilitate the separation of the cover/window covering film 24 from the main body covering film 20. The unlocking structure 240 is fixedly attached to the edge of the cover window covering film 24. The unlocking structure 240 is a tab.

When windowing operation needs to be performed on the preset windowing tectorial membrane stent 100, the recovery device is adopted to capture the position, close to the pull ring, of the uncapping window tectorial membrane 24, and the uncapping window tectorial membrane 24 is only attached to the main body tectorial membrane 20 through medical glue with weak viscosity, so that the uncapping window tectorial membrane 24 is easy to fall off from the main body tectorial membrane 20; then insert through recovery device's recovery hook in draw the intra-annular to tear lid window tectorial membrane 24 off, make lid window tectorial membrane 24 and main part tectorial membrane 20 separate completely, form the windowing, easy operation, convenient to use has reduced the risk.

The utility model provides a preset tectorial membrane support system of windowing, it includes preset tectorial membrane support 100 of windowing and conveyer, preset tectorial membrane support 100 of windowing and include main part tectorial membrane 20 and be fixed in main part tectorial membrane 20's support chassis 40, main part tectorial membrane 20's wall sets up an at least pre-windowing district 22, pre-windowing district 22 sets up sealing connection in main part tectorial membrane 20's lid window tectorial membrane 24, lid window tectorial membrane 24 removes the back from main part tectorial membrane 20 to form windowing 27 on main part tectorial membrane 20, preset tectorial membrane support 100 of windowing still includes the unlocking device who removes lid window tectorial membrane 24, be provided with the forceps holder structure of connecting unlocking device on the conveyer.

The above is an implementation manner of the embodiments of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principles of the embodiments of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. The utility model provides a preset fenestration tectorial membrane support, its includes the main part tectorial membrane and is fixed in the support chassis of main part tectorial membrane, its characterized in that, the wall of main part tectorial membrane sets up at least one and opens the window district in advance, it sets up sealing connection in to open the window tectorial membrane in the lid of main part tectorial membrane in advance, the lid window tectorial membrane is followed the back is removed on the main part tectorial membrane, in order to form the fenestration on the main part tectorial membrane.

2. The pre-fenestration stent-graft of claim 1, wherein the intersection of the cover-window-graft and the main-body-graft is provided with a non-through score or a suture that can be torn off by a continuous single thread to connect the cover-window-graft and the main-body-graft, the score has a strength that is less than that of the other positions of the main-body-graft, and the cover-window-graft is separated from the main-body-graft along the score.

3. The pre-fenestrated stent graft of claim 2, wherein the body graft provides a support ring around the score.

4. The pre-fenestrated stent graft of claim 3, wherein the support ring is made of a developable material.

5. The pre-fenestrated stent graft of claim 3, wherein the support ring is sewn, heat pressed, mounted, or affixed to the main body stent graft.

6. The pre-fenestration stent graft of claim 2, wherein at least one circle of development points or development wires is disposed on or around the score.

7. The pre-fenestration stent-graft of claim 2, wherein an unlocking structure is disposed on the outer surface of the cover/window membrane adjacent to the score, and the cover/window membrane can be detached from the main body membrane by pulling the unlocking structure.

8. The pre-fenestration stent-graft of claim 7, wherein the unlocking structure is a developing wire fixedly connected to the cover window membrane, the developing wire penetrates out of the outer surface of the cover window membrane after surrounding a circle along the score, and the unlocking structure is formed at the end of the developing wire.

9. The pre-fenestrated stent graft of claim 1, wherein the main body graft defines a window in the pre-fenestrated region, the cover window graft covers the window, and the window defines a branch opening of the blood vessel when the cover window graft is removed.

10. The pre-fenestrated stent graft of claim 9, wherein the body graft provides a support ring around the window, and wherein an edge of the cover window graft is positioned between the edge of the window and the support ring.

11. The pre-fenestration stent graft of claim 9, wherein an unlocking device is arranged on the outer surface of the cover/window membrane, and the cover/window membrane can be separated from the main body membrane by pulling the unlocking device.

12. The pre-fenestration stent graft of claim 11, wherein the unlocking device is made of a contrast material.

13. The pre-fenestration stent graft of claim 12, wherein the unlocking device is defined by nitinol wire.

14. The pre-fenestrated stent graft of claim 9, wherein the edge of the cover-window membrane is connected with the main-body membrane by suture, and after the two sections of the suture are connected by slipknots, a rope loop is tied at the end of the suture.

15. The pre-fenestrated stent graft of claim 14, wherein the suture is a developing wire.

16. The pre-fenestration stent graft of claim 1, wherein the supporting framework comprises a plurality of annular corrugated supporting rods axially arranged on the main body stent graft, at least one of the annular corrugated supporting rods is provided with a relief portion, and at least one of the pre-fenestration areas is an area surrounded by the relief portion.

17. The pre-fenestration stent graft of claim 16, wherein the relief portion comprises two adjacent tie bars and a trough between the two tie bars, each tie bar being curved away from the opposite tie bar; or the yielding part comprises two adjacent connecting rods and a wave crest positioned between the two connecting rods, and each connecting rod bends towards one side far away from the other opposite connecting rod.

18. The utility model provides a predetermine tectorial membrane support system of windowing, is including predetermineeing tectorial membrane support and conveyer of windowing, predetermine tectorial membrane support of windowing include the main part tectorial membrane and be fixed in the support chassis of main part tectorial membrane, a serial communication port, the wall of main part tectorial membrane sets up an at least district of windowing in advance, set up sealing connection in the district of windowing in advance the lid window tectorial membrane of main part tectorial membrane, the lid window tectorial membrane is followed remove the back on the main part tectorial membrane, in order form the windowing on the main part tectorial membrane, the support is including removing the unlocking device of lid window tectorial membrane, be provided with the forceps holder structure of connecting unlocking device on the conveyer.