CN118717354B

CN118717354B - Abdominal aorta multi-branch stent

Info

Publication number: CN118717354B
Application number: CN202410849091.XA
Authority: CN
Inventors: 李晓强; 杨云鹤; 吴浩田; 崔继涛; 谈帮顺; 温智
Original assignee: Guichuang Tongqiao Medical Technology Co ltd
Current assignee: Guichuang Tongqiao Medical Technology Co ltd
Priority date: 2024-06-27
Filing date: 2024-06-27
Publication date: 2025-09-05
Anticipated expiration: 2044-06-27
Also published as: CN118717354A

Abstract

The application relates to an abdomen main multi-branch support, which comprises a main support frame, a connecting support frame, a main body covering film, a branch covering film and a connecting covering film, wherein the main body covering film is provided with a first mounting hole, and the branch covering film is connected with the first mounting hole through the connecting covering film. The main support frames support the main body covering film, the plurality of main support frames are arranged along the axial direction of the main body covering film, and the plane unfolding structure of each main support frame is wavy. The connecting support frame supports the connecting tectorial membrane, and the connecting support frame includes a plurality of peak values towards the wave form section that keeps away from branch tectorial membrane direction extension, and a plurality of wave form sections end to end form wave form closed loop structure. Defining a straight line parallel to the main body tectorial membrane axis intersecting with the tectorial membrane central axis as an axial fold line, wherein the axial fold line passes through the wave crest or the wave trough of the main support frame and the wave crest of the wave-shaped section or the wave trough between the adjacent wave-shaped sections. The abdomen main multi-branch stent provided by the application solves the technical problem that the tectorial membrane stent is difficult to synchronously achieve good compressibility and sealing performance.

Description

Abdominal multi-branch support

Technical Field

The application relates to the technical field of lumen stents, in particular to an abdomen main multi-branch stent.

Background

The human body has various tubular cavities, such as lumen, trachea, esophagus, biliary tract, intestinal tract, urethra, etc., with diameters ranging from several millimeters to tens of millimeters.

When the tubular cavities are subjected to pathological changes such as stenosis, leakage breaking or tumor expansion, the tubular cavities are generally expanded by implantation of a lumen stent, or the tubular cavities of a human body are restored to be unobstructed by implantation of a covered stent into the lumen tumor and leakage breaking positions for repair.

Thus, not only does the stent graft require superior compressibility to facilitate passage through a narrow tubular lumen. Moreover, the stent graft also needs to be capable of being tightly adhered to the inner wall of the tubular cavity to prevent leakage of the stent graft.

Disclosure of Invention

Based on the above, it is necessary to provide a main abdominal multi-branch stent, so as to solve the technical problem that the prior art of the covered stent is difficult to simultaneously achieve better compressibility and sealing performance.

The abdomen main multi-branch support comprises a main support frame, a connecting support frame, a main body covering film, a branch covering film and a connecting covering film, wherein the main body covering film and the branch covering film are cylindrical, the connecting covering film is annular surrounding the branch covering film, one or more first mounting holes are formed in the side wall of the main body covering film, and each branch covering film is connected to the side edge of each first mounting hole through the corresponding connecting covering film. The main support frames are used for supporting the main body covering film, the plurality of main support frames are arranged along the axial direction of the main body covering film, and each main support frame is wavy along the plane unfolding structure of the circumferential direction of the main body covering film. The connecting support frame is used for supporting the connecting tectorial membrane, and the connecting support frame includes a plurality of peak values towards the wave-shaped section that keeps away from branch tectorial membrane direction and extends, and a plurality of wave-shaped sections are arranged in proper order and end to end along the circumferencial direction of connecting tectorial membrane and form wave-shaped closed loop structure. Defining a straight line parallel to the axis of the main body tectorial membrane as a bus, defining a bus intersecting with the central axis of the connecting tectorial membrane as an axial fold line, wherein the axial fold line passes through the wave crest or the wave trough of each main support frame, and the axial fold line passes through the wave crest of the corresponding wave section or the wave trough between the adjacent wave sections, so that the abdomen main multi-branch support frame can be radially folded through the axial fold line.

In one embodiment, each main support frame has a simple harmonic shape along the plane unfolding structure of the circumferential direction of the main body tectorial membrane.

In one embodiment, the central axis of the connecting tectorial membrane and the central axis of the main body tectorial membrane are defined to form a vertical plane, a straight line perpendicular to the vertical plane and intersecting the central axis of the connecting tectorial membrane is defined as a radial fold line, the radial fold line passes through a gap between adjacent main support frames, and the radial fold line passes through a crest of a corresponding wave-shaped section or passes through a trough between adjacent wave-shaped sections, so that the main abdominal multi-branch support can be axially folded through the radial fold line.

In one embodiment, the number of the waveform segments is four, which are respectively defined as a first wave band, a second wave band, a third wave band and a fourth wave band, and the first wave band, the second wave band, the third wave band and the fourth wave band are sequentially connected end to form the connecting support frame. The axial fold line passes through a trough between the first band and the fourth band, and the axial fold line passes through a trough between the second band and the third band. The radial fold line passes through a trough between the first band and the second band, and the radial fold line passes through a trough between the third band and the fourth band.

In one embodiment, the main abdominal multi-branch stent further comprises a branch strut for supporting the branch stent graft. The branch support frame is wavy along the plane unfolding structure of the circumferential direction of the branch coating film, the axial fold line passes through the wave crest or the wave trough of the branch support frame, and the radial fold line passes through the wave crest or the wave trough of the branch support frame.

In one embodiment, the body cover includes a plurality of first annular void regions extending circumferentially about itself, and the body cover further includes a plurality of second annular void regions extending circumferentially about itself, the first annular void regions and the second annular void regions being alternately arranged along an axial direction of the body cover. The first annular pore region is provided with a plurality of densely distributed first pores, the second annular pore region is provided with a plurality of densely distributed second pores, and the pore diameter value of the first pores is larger than that of the second pores.

In one embodiment, the main body cover includes a first end and a second end, and the branch cover is disposed between the first end and the second end. Along the direction from the first end to the branch tectorial membrane, a plurality of main support frames are defined as first metal support body, second metal support body and third metal support body in proper order, and the planar expansion structure of first metal support body, second metal support body and third metal support body along main part tectorial membrane circumferencial direction all is the simple harmonic wave form, and the angular frequency of first metal support body expansion structure and the angular frequency of second metal support body expansion structure all are less than the angular frequency of third metal support body expansion structure. Along the direction from the second end to the branch tectorial membrane, a plurality of main support frames are defined as fourth metal support body, fifth metal support body and sixth metal support body in proper order, and the planar expansion structure of fourth metal support body, fifth metal support body and sixth metal support body along main part tectorial membrane circumferencial direction all is the harmonic wave form, and the angular frequency of fourth metal support body expansion structure and the angular frequency of fifth metal support body expansion structure all are less than the angular frequency of sixth metal support body expansion structure.

In one embodiment, the first metal frame body and the fourth metal frame body are arranged in a mirror symmetry manner, or the first metal frame body and the fourth metal frame body are arranged in a periodic manner along the axial direction of the main body coating;

And/or the second metal frame body and the fifth metal frame body are arranged in mirror symmetry, or the second metal frame body and the fifth metal frame body are arranged periodically along the axial direction of the main body coating film;

And/or the third metal frame body and the sixth metal frame body are arranged in mirror symmetry, or the third metal frame body and the sixth metal frame body are arranged periodically along the axial direction of the main body coating film;

And/or the first metal frame body and the second metal frame body are arranged in mirror symmetry, or the first metal frame body and the second metal frame body are arranged periodically along the axial direction of the main body coating;

And/or the fourth metal frame body and the fifth metal frame body are arranged in mirror symmetry, or the fourth metal frame body and the fifth metal frame body are arranged periodically along the axial direction of the main body coating.

In one embodiment, the third metal frame body comprises a first waveform support and a second waveform support, one of the first waveform support and the second waveform support is sleeved on the outer peripheral side of the other one, or one of the first waveform support and the second waveform support is arranged on the inner wall of the main body tectorial membrane, and the other one is arranged on the outer wall of the main body tectorial membrane. The sixth metal frame body comprises a third waveform support and a fourth waveform support, one of the third waveform support and the fourth waveform support is sleeved on the outer periphery side of the other one, or one of the third waveform support and the fourth waveform support is arranged on the inner wall of the main body tectorial membrane, and the other one is arranged on the outer wall of the main body tectorial membrane.

In one embodiment, the peaks of the first and second wave brackets are staggered along the circumference of the main body coating;

And/or, the wave crest of the third wave-shaped bracket and the wave crest of the fourth wave-shaped bracket are staggered along the circumferential direction of the main body tectorial membrane;

And/or, the wave crest of the first wave-shaped bracket and the wave crest of the third wave-shaped bracket are arranged opposite to each other along the circumferential direction of the main body coating, or the wave crest of the first wave-shaped bracket and the wave crest of the third wave-shaped bracket are arranged in a staggered manner along the circumferential direction of the main body coating;

and/or the wave crest of the second wave-shaped bracket and the wave crest of the fourth wave-shaped bracket are arranged opposite to each other along the circumferential direction of the main body coating, or the wave crest of the second wave-shaped bracket and the wave crest of the fourth wave-shaped bracket are arranged in a staggered manner along the circumferential direction of the main body coating.

In one embodiment, the first metal frame body includes a fifth wave-shaped support and a sixth wave-shaped support, one of the fifth wave-shaped support and the sixth wave-shaped support is sleeved on the outer peripheral side of the other, or one of the fifth wave-shaped support and the sixth wave-shaped support is arranged on the inner wall of the main body covering film, and the other is arranged on the outer wall of the main body covering film. The fourth metal frame body comprises a seventh waveform support and an eighth waveform support, one of the seventh waveform support and the eighth waveform support is sleeved on the outer periphery side of the other one, or one of the seventh waveform support and the eighth waveform support is arranged on the inner wall of the main body tectorial membrane, and the other one is arranged on the outer wall of the main body tectorial membrane.

In one embodiment, at least a portion of the peaks of the fifth wave form stent protrude from the end of the main body cover along the axial direction of the main body cover;

and/or, at least part of the wave crest of the seventh wave-shaped bracket protrudes out of the end part of the main body coating along the axial direction of the main body coating.

In one embodiment, the diameter of the branch film is smaller than the inner diameter of the first mounting hole, and the axial direction of the main body film and the axial direction of the branch film are not arranged in parallel. The connecting coating film is in a truncated cone shape, one end of the connecting coating film is connected to the edge of the first mounting hole, the other end of the connecting coating film is sunken towards the inner side of the main coating film and is connected to one end edge of the branch coating film, the branch coating film is arranged on the outer side of the connecting coating film, and one end of the branch coating film, far away from the connecting coating film, extends towards the direction far away from the axis of the main coating film.

Compared with the prior art, the main abdominal multi-branch support provided by the application has the advantages that firstly, the main support frame and the connecting support frame are arranged, so that the main abdominal multi-branch support in an unfolded state can keep the shape of the main abdominal multi-branch support and cannot deform, the main body tectorial membrane can be tightly attached to the inner wall of the tubular cavity, the main abdominal multi-branch support is prevented from leaking inwards, namely, the main abdominal multi-branch support is arranged in such a way, and the tightness of the main abdominal multi-branch support is greatly improved.

Further, since the main support frames are waved in a plane deployment structure along the circumferential direction of the main body stent graft, and the axial folding lines pass through the peaks or valleys of each main support frame.

It can be seen that when the main support frames are folded in half in the radial direction, the crease lines (i.e., axial crease lines) pass through the crest or trough of each main support frame, and since the main support frames extend in the circumferential direction of the main body covering film, the tangent lines of the main support frames at the crest or trough are perpendicular to the axial crease lines, and at this time, the stress resistance of the main support frames to folding is minimal, i.e., the main support frames are most easily folded.

Furthermore, as the connecting support frame is a wave-shaped closed loop structure formed by sequentially arranging a plurality of wave-shaped sections along the circumferential direction of the connecting tectorial membrane and connecting the wave-shaped sections end to end, the axial folding lines penetrate through wave crests of the corresponding wave-shaped sections or wave troughs between the adjacent wave-shaped sections.

Therefore, when the main support frame is folded in half along the radial direction, the crease (namely the axial fold line) passes through the wave crest of the corresponding wave-shaped section or the trough between the adjacent wave-shaped sections, and the connecting support frame is in a circular ring shape surrounding the branch tectorial membrane, so that the tangent line of the connecting support frame at the wave crest or the trough is also perpendicular to the axial fold line, and at the moment, the resistance stress generated by folding the connecting support frame is minimum, namely the connecting support frame is most easily folded.

Therefore, in summary, the abdomen main multi-branch stent provided by the application not only has stronger sealing performance, but also can be folded and compressed along the radial direction of the abdomen main multi-branch stent so as to be convenient to convey into a tubular cavity.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following descriptions are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic view of a main abdominal multi-branch stent according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a main abdominal multi-branch stent according to an embodiment of the present application;

FIG. 3 is an enlarged view of a part of the main abdominal multi-branch stent according to an embodiment of the present application;

FIG. 4 is a schematic view of a main abdominal multi-branch stent according to another embodiment of the present application;

FIG. 5 is a schematic view of a main abdominal multi-branch stent according to another embodiment of the present application;

fig. 6 is a schematic structural view of an abdominal main multi-branch stent according to still another embodiment of the present application.

The reference numerals comprise 110, a first metal frame body, 111, a fifth waveform frame body, 112, a sixth waveform frame body, 120, a second metal frame body, 130, a third metal frame body, 131, a first waveform frame body, 132, a second waveform frame body, 140, a fourth metal frame body, 141, a seventh waveform frame body, 142, an eighth waveform frame body, 150, a fifth metal frame body, 160, a sixth metal frame body, 161, a third waveform frame body, 162, a fourth waveform frame body, 200, a connecting support frame, 210, a first wave band, 220, a second wave band, 230, a third wave band, 240, a fourth wave band, 300, a main body covering film, 310, a first end, 320, a second end, 400, a branch covering film, 500, a connecting covering film, 600, a branch support frame, 700, a reference covering film and 800 and a reference support frame.

Detailed Description

The application provides an abdomen main multi-branch bracket, which aims to solve the technical problem that a film covered bracket in the prior art is difficult to synchronously achieve better compressibility and sealing performance.

Referring to fig. 1 to 6, the main abdominal multi-branch stent comprises a main stent, a connection stent 200, a main stent graft 300, a branch stent graft 400 and a connection stent graft 500. The main body cover film 300 and the branch cover film 400 are both cylindrical, the connecting cover film 500 is annular around the branch cover film 400, one or more first mounting holes are formed in the side wall of the main body cover film 300, and each branch cover film 400 is connected to the side edge of the first mounting hole through the corresponding connecting cover film 500.

The main support hoop is provided on the outer surface or the inner surface or the inside of the side wall of the main body cover 300 to support the main body cover 300. The plurality of main support frames are arranged along the axial direction of the main body cover 300, and each of the main support frames has a wave shape along a planar deployment structure of the main body cover 300 in the circumferential direction.

The wavy form is a form that extends in a continuous S shape or an approximately S shape along a certain direction, and in the present application, the wavy main support extends in the circumferential direction of the main body cover 300.

Specifically, in one embodiment, as shown in FIGS. 1-6, each primary support frame has a simple harmonic shape along the planar deployment structure of the circumferential direction of the main body cover 300.

Note that the circumferential direction of the main body coating 300 corresponds to the x-axis direction of the simple harmonic waveform, and the axial direction of the main body coating 300 corresponds to the y-axis direction of the simple harmonic waveform.

The wave function of the simple harmonic waveform is in the form of a sine or cosine function.

However, the present invention is not limited thereto, and in another embodiment, the wave shape of the main support frame may be other forms, for example, the main support frame is formed by connecting a plurality of splayed unit modules end to end, and adjacent unit modules and the inside of the unit modules are connected through arc transition sections.

The connection support frame 200 is provided at an outer surface or an inner surface or inside a sidewall of the connection film 500 to support the connection film 500.

Specifically, the whole connecting support frame 200 is in a shape of a truncated cone, and the connecting support frame 200 is a truncated cone-shaped metal frame formed by shaping and processing a metal wire.

The main support frame and the main body cover 300 are fixed by a fiber line suture, and the connection support frame 200 and the connection cover 500 are fixed by a fiber line suture.

The connection support frame 200 includes a plurality of wave segments having peaks extending away from the branch coating 400, and the wave segments are sequentially arranged along the circumferential direction of the connection coating 500 and connected end to form a wave-shaped closed loop structure.

A straight line parallel to the axis of the main body stent graft 300 is defined as a generatrix, a generatrix intersecting the central axis of the connecting stent graft 500 is defined as an axial fold line, the axial fold line passes through the peak or trough of each main stent graft, and the axial fold line passes through the peak of the corresponding wave segment or through the trough between the adjacent wave segments, so that the abdominal main multi-branch stent can be radially folded by the axial fold line.

It will be appreciated that there are numerous axial fold lines, with different positions corresponding to different axial fold lines.

Firstly, by providing the main support frame and the connection support frame 200, the main abdominal multi-branch support in the unfolded state can maintain its shape and cannot be deformed, so that the main body covering film 300 can be ensured to be tightly attached to the inner wall of the tubular cavity, and thus the main abdominal multi-branch support is prevented from leaking inwards, that is, the main abdominal multi-branch support is provided in such a way, and the tightness of the main abdominal multi-branch support is greatly improved.

Further, since the main support frames are waved along the plane deployment structure of the circumferential direction of the main body cover 300, and the axial folding lines pass through the peaks or valleys of each main support frame.

It can be seen that when the main support frames are folded in half in the radial direction, the crease (i.e., the axial crease line) passes through the peak or trough of each main support frame, and since the main support frames extend in the circumferential direction of the main body cover 300, the tangent line of the main support frame at the peak or trough is perpendicular to the axial crease line, and at this time, the stress resistance of the main support frame caused by folding the main support frames is minimal, i.e., the main support frames are most easily folded.

Further, since the connection supporting frame 200 is a wave-shaped closed loop structure formed by sequentially arranging a plurality of wave-shaped segments along the circumferential direction of the connection covering film 500 and connecting the wave-shaped segments end to end, and the axial folding lines pass through the wave crests of the corresponding wave-shaped segments or pass through the wave troughs between the adjacent wave-shaped segments.

It can be seen that, when the main support frame is folded in half along the radial direction, the crease (i.e., the axial fold line) passes through the crest of the corresponding wave segment or the trough between the adjacent wave segments, and the connecting support frame 200 is in a circular ring shape surrounding the branch covering film 400, so that the tangent line of the connecting support frame 200 at the crest or trough is also perpendicular to the axial fold line, at this time, the stress resistance generated by folding the connecting support frame 200 is minimal, i.e., the connecting support frame 200 is most easily folded.

In one embodiment, the axis connecting the central axis of the stent graft 500 and the axis of the main stent graft 300 is defined to form a vertical plane, the straight line perpendicular to the vertical plane and intersecting the central axis connecting the stent graft 500 is defined as a radial fold line, the radial fold line passes through the gap between adjacent main stent struts, and the radial fold line passes through the peaks of the corresponding undulating segments or passes through the valleys between adjacent undulating segments, so that the main abdominal multi-branch stent can be folded axially by the radial fold line.

By the arrangement, the main abdominal multi-branch stent can be axially folded, and the length of the main abdominal multi-branch stent is reduced so as to further compress the main abdominal multi-branch stent.

Further, in an embodiment, as shown in fig. 3, the number of the waveform segments is four, which are respectively defined as a first wave segment 210, a second wave segment 220, a third wave segment 230 and a fourth wave segment 240, and the first wave segment 210, the second wave segment 220, the third wave segment 230 and the fourth wave segment 240 are sequentially connected end to form the connection support frame 200.

The axial fold line passes through the trough between the first band 210 and the fourth band 240 and the axial fold line passes through the trough between the second band 220 and the third band 230.

The radial fold line passes through the trough between the first band 210 and the second band 220 and the radial fold line passes through the trough between the third band 230 and the fourth band 240.

So set up, the simple structure of connection support frame 200 just easily folds.

However, in other embodiments, the number of waveform segments may be six, eight, ten, etc., not specifically recited herein.

In one embodiment, as shown in fig. 3, the main abdominal multi-branch stent further comprises a branch stent 600, and the branch stent 600 is disposed on the outer surface or the inner surface or the inside of the side wall of the branch stent 400 to support the branch stent 400.

Specifically, the branch strut 600 and the branch cover 400 are fixed by fiber suture.

The branch stent 600 is waved along the plane deployment structure of the circumferential direction of the branch stent graft 400, and the axial folding lines pass through the peaks or the valleys of the branch stent 600, and the radial folding lines pass through the peaks or the valleys of the branch stent 600.

By the arrangement, on one hand, the supportability of the branch coating film 400 is greatly improved, and the branch coating film 400 is prevented from being deformed to cause internal leakage. In addition, the rigidity of the branched coating 400 is improved, which is beneficial to the movement adjustment of the branched coating 400. On the other hand, since the radial folding lines and the axial folding lines respectively pass through the peaks or the troughs of the branch stent 600, the branch stent 400 and the branch stent 600 can also be folded to a certain extent, and the compressibility of the whole abdominal main multi-branch stent is greatly improved.

However, the present invention is not limited thereto, and in other embodiments, the corresponding support structure may be formed by reinforcement of the structures of the main body cover film 300, the branch cover film 400, and the connection cover film 500 themselves.

In one embodiment, the body cover 300 includes a plurality of first annular void regions (not shown) extending circumferentially therealong, and the body cover 300 further includes a plurality of second annular void regions (not shown) extending circumferentially therealong, the first and second annular void regions being alternately arranged along the axial direction of the body cover 300.

The first annular pore region is provided with a plurality of densely distributed first pores (not shown), and the second annular pore region is provided with a plurality of densely distributed second pores (not shown), wherein the pore diameter value of the first pores is larger than that of the second pores.

This arrangement facilitates anchoring between the body cover 300 and the inner wall of the tubular cavity. Specifically, the pore diameter value of the first pore is larger, so that the first annular pore region is easy to climb by the growth of cells on the inner wall of the tubular cavity, the average pore diameter of the second pore is smaller, and the second annular pore region and the inner wall of the tubular cavity can be prevented from being completely adhered together.

Further, in an embodiment, the distribution density of the first voids within the first annular void region is greater than the distribution density of the second voids within the second annular void region.

In an embodiment, the sealability of the branch film 400 tends to decrease in a direction from approaching the main body film 300 to separating from the main body film 300. Because of the greater pressure at the proximal end, the branched cover 400 provides greater sealing near the main body cover 300 (proximal end), which is more advantageous in preventing leakage of bodily fluids.

In one embodiment, as shown in fig. 1-6, the main body cover 300 includes a first end 310 and a second end 320, and the branch cover 400 is disposed between the first end 310 and the second end 320.

Along the direction from the first end 310 to the branch coating 400, the plurality of main support frames are sequentially defined as a first metal frame 110, a second metal frame 120 and a third metal frame 130, the planar unfolding structures of the first metal frame 110, the second metal frame 120 and the third metal frame 130 along the circumferential direction of the main body coating 300 are all in simple harmonic waveforms, and the angular frequency of the unfolding structure of the first metal frame 110 and the angular frequency of the unfolding structure of the second metal frame 120 are smaller than the angular frequency of the unfolding structure of the third metal frame 130.

Along the direction from the second end 320 to the branch coating 400, the plurality of main support frames are sequentially defined as a fourth metal frame 140, a fifth metal frame 150 and a sixth metal frame 160, the planar unfolding structures of the fourth metal frame 140, the fifth metal frame 150 and the sixth metal frame 160 along the circumferential direction of the main body coating 300 are all in simple harmonic waveforms, and the angular frequency of the unfolding structure of the fourth metal frame 140 and the angular frequency of the unfolding structure of the fifth metal frame 150 are smaller than the angular frequency of the unfolding structure of the sixth metal frame 160.

It will be appreciated that the greater the angular frequency, the denser the wave form and, thus, the arrangement may improve the support of the main support adjacent the branch stent 400.

In an embodiment, the number of the second metal frames 120 is one or more, and when the number of the second metal frames 120 is plural, the plurality of second metal frames 120 are distributed at intervals.

Similarly, the number of the fifth metal frames 150 is one or more, and when the number of the fifth metal frames 150 is plural, the plurality of fifth metal frames 150 are spaced apart.

In one embodiment, as shown in fig. 1, 2, 4, 5 and 6, the first metal frame 110 and the fourth metal frame 140 are disposed in mirror symmetry.

By the arrangement, the stress at the two ends of the main abdominal multi-branch bracket tends to be consistent, and the integral support of the main abdominal multi-branch bracket is improved.

However, in another embodiment, the first metal frame 110 and the fourth metal frame 140 are arranged in a periodic arrangement along the axial direction of the main body coating 300, that is, the first metal frame 110 and the fourth metal frame 140 are identical in shape except for the positions thereof.

The arrangement is beneficial to improving the flexibility of the main abdominal multi-branch stent and adapting to larger bending angle.

In one embodiment, as shown in fig. 1, 2, 4, 5 and 6, the second metal frame 120 and the fifth metal frame 150 are disposed in mirror symmetry.

However, in another embodiment, the second metal frame 120 and the fifth metal frame 150 are arranged in a periodic arrangement along the axial direction of the main body coating 300, that is, the second metal frame 120 and the fifth metal frame 150 are identical in shape except for the positions thereof.

In one embodiment, as shown in fig. 1, 2, 4, 5 and 6, the third metal frame 130 and the sixth metal frame 160 are disposed in mirror symmetry.

However, in another embodiment, the third metal frame 130 and the sixth metal frame 160 are arranged in a periodic arrangement along the axial direction of the main body coating 300, that is, the third metal frame 130 and the sixth metal frame 160 are identical in shape except for the positions thereof.

In one embodiment, the first metal frame 110 and the second metal frame 120 are disposed in mirror symmetry.

By the arrangement, the stress at the same end of the main abdominal multi-branch bracket tends to be consistent, and the integral support of the main abdominal multi-branch bracket is improved.

However, in another embodiment, as shown in fig. 6, the first metal frame 110 and the second metal frame 120 are arranged in a periodic arrangement along the axial direction of the main body coating 300, that is, the first metal frame 110 and the second metal frame 120 are identical in shape except for the positions thereof.

In one embodiment, the fourth metal frame 140 and the fifth metal frame 150 are disposed in mirror symmetry.

However, in another embodiment, as shown in fig. 6, the fourth metal frame 140 and the fifth metal frame 150 are arranged in a periodic arrangement along the axial direction of the main body coating 300, that is, the fourth metal frame 140 and the fifth metal frame 150 are identical in shape except for the positions thereof.

In an embodiment, as shown in fig. 1-5, the third metal frame 130 includes a first wave bracket 131 and a second wave bracket 132, one of the first wave bracket 131 and the second wave bracket 132 is sleeved on the outer peripheral side of the other, or one of the first wave bracket 131 and the second wave bracket 132 is disposed on the inner wall of the main body covering film 300, and the other is disposed on the outer wall of the main body covering film 300.

By this arrangement, the support of the third metal frame 130 to the main body cover 300 is greatly improved.

Further, in an embodiment, as shown in fig. 1-5, the peaks of the first wave bracket 131 and the peaks of the second wave bracket 132 are staggered along the circumference of the main body covering film 300, and similarly, the troughs of the first wave bracket 131 and the troughs of the second wave bracket 132 are staggered along the circumference of the main body covering film 300.

With this arrangement, the support of the first and second wave brackets 131 and 132 to the main body cover 300 is further improved.

Preferably, the peaks of the first wave bracket 131 and the valleys of the second wave bracket 132 are disposed opposite to each other.

It should be noted that the peak amplitude of the first wave bracket 131 is not fixed, and the peak amplitude of the first wave bracket 131 is smaller when blocked by the connection film 500, and the peak amplitude of the first wave bracket 131 is larger when blocked by the connection film 500.

Thus, the respective empty regions of the main body cover film 300 can be filled up well, and the empty regions of the main body cover film 300 can be prevented from being lack of support.

Preferably, the sum of the wire diameter value of the first wave bracket 131 and the wire diameter value of the second wave bracket 132 is greater than the wire diameter value of the fifth metal frame 150. Further, the wire diameter of the first wave bracket 131 and the wire diameter of the second wave bracket 132 are smaller than the wire diameter of the fifth metal frame 150.

The "wire diameter value" refers to the width dimension of the cross section of the elongated body constituting the wave bracket or the metal frame body, and may be understood as the diameter dimension of a general metal wire.

By the arrangement, the uniformity and the compliance of the support property of the main abdominal multi-branch support can be ensured.

In an embodiment, as shown in fig. 1-5, the sixth metal frame 160 includes a third wave-shaped bracket 161 and a fourth wave-shaped bracket 162, one of the third wave-shaped bracket 161 and the fourth wave-shaped bracket 162 is sleeved on the outer peripheral side of the other, or one of the third wave-shaped bracket 161 and the fourth wave-shaped bracket 162 is disposed on the inner wall of the main body covering film 300, and the other is disposed on the outer wall of the main body covering film 300.

With this arrangement, the support of the sixth metal frame 160 to the main body cover 300 is greatly improved.

Further, in an embodiment, as shown in fig. 1-5, the peaks of the third wave form stent 161 and the peaks of the fourth wave form stent 162 are staggered along the circumference of the main body stent 300, and similarly, the troughs of the third wave form stent 161 and the troughs of the fourth wave form stent 162 are staggered along the circumference of the main body stent 300.

With this arrangement, the support of the third and fourth wave brackets 161, 162 to the main body cover 300 is further improved.

Preferably, the peaks of the third wave form support 161 and the valleys of the fourth wave form support 162 are disposed opposite to each other.

Note that the peak amplitude of the third wave form holder 161 is not fixed, and the peak amplitude of the third wave form holder 161 is smaller when blocked by the connection film 500, and the peak amplitude of the third wave form holder 161 is larger when blocked by the connection film 500.

In one embodiment, as shown in fig. 1-4, the peaks of the first wave bracket 131 and the peaks of the third wave bracket 161 are disposed directly opposite along the circumferential direction of the body cover 300, and the valleys of the first wave bracket 131 and the valleys of the third wave bracket 161 are disposed directly opposite along the circumferential direction of the body cover 300.

The peaks of the second wave form stent 132 and the peaks of the fourth wave form stent 162 are disposed directly opposite along the circumferential direction of the main body stent graft 300, and the valleys of the second wave form stent 132 and the valleys of the fourth wave form stent 162 are disposed directly opposite along the circumferential direction of the main body stent graft 300.

By the arrangement, the stress at the two ends of the connecting tectorial membrane 500 tends to be consistent, and the overall support property of the two ends of the connecting tectorial membrane 500 is improved.

However, in another embodiment, as shown in fig. 5 and 6, the peaks of the first and third wave brackets 131 and 161 are disposed offset along the circumferential direction of the body cover 300, and the valleys of the first and third wave brackets 131 and 161 are disposed offset along the circumferential direction of the body cover 300.

The peaks of the second and fourth undulating brackets 132, 162 are arranged offset along the circumferential direction of the main body cover 300, and the troughs of the second and fourth undulating brackets 132, 162 are arranged offset along the circumferential direction of the main body cover 300.

In an embodiment, as shown in fig. 1,2,4 and 5, the first metal frame 110 includes a fifth wave-shaped bracket 111 and a sixth wave-shaped bracket 112, one of the fifth wave-shaped bracket 111 and the sixth wave-shaped bracket 112 is sleeved on the outer periphery side of the other, or one of the fifth wave-shaped bracket 111 and the sixth wave-shaped bracket 112 is disposed on the inner wall of the main body covering film 300, and the other is disposed on the outer wall of the main body covering film 300.

By this arrangement, the support of the main body cover 300 by the first metal frame 110 is greatly improved.

Further, in an embodiment, as shown in fig. 1,2, 4 and 5, at least part of the peaks of the fifth wave bracket 111 protrude from the end of the main body cover 300 along the axial direction of the main body cover 300.

This arrangement facilitates the firm clamping of the main abdominal multi-branch stent within the core of the delivery system by the fifth undulating stent 111.

In an embodiment, as shown in fig. 1, 2, 4 and 5, the fourth metal frame 140 includes a seventh wave-shaped bracket 141 and an eighth wave-shaped bracket 142, one of the seventh wave-shaped bracket 141 and the eighth wave-shaped bracket 142 is sleeved on the outer circumference side of the other, or one of the seventh wave-shaped bracket 141 and the eighth wave-shaped bracket 142 is disposed on the inner wall of the main body covering film 300, and the other is disposed on the outer wall of the main body covering film 300.

By this arrangement, the support of the fourth metal frame 140 to the main body cover 300 is greatly improved.

Further, in an embodiment, as shown in fig. 1,2, 4 and 5, at least a portion of the peak of the seventh wave bracket 141 protrudes from the end of the main body cover 300 along the axial direction of the main body cover 300.

This arrangement facilitates the firm clamping of the main abdominal multi-branch stent within the core of the delivery system by the seventh undulating stent 141.

In one embodiment, as shown in fig. 1-6, the diameter of the branched cover 400 is smaller than the inner diameter of the first mounting hole, and the axial direction of the main body cover 300 and the axial direction of the branched cover 400 are not arranged in parallel.

The connection film 500 is in a truncated cone shape, one end of the connection film 500 is connected to the edge of the first mounting hole, the other end of the connection film 500 is recessed toward the inner side of the main body film 300 and connected to the edge of one end of the branch film 400, the branch film 400 is disposed on the outer side (the side away from the cavity of the main body film 300) of the connection film 500, and one end of the branch film 400 away from the connection film 500 extends in a direction away from the axis of the main body film 300.

The main body film 300 is disposed in the main lumen, and the branch film 400 is used to communicate with the branch lumen so that the body fluid in the main lumen enters the branch lumen through the main body film 300 and the branch film 400.

Because the connection coating 500 is in a truncated cone shape, and one end of the connection coating 500 is connected to the edge of the first mounting hole, and the other end is recessed toward the inner side of the main body coating 300 and connected to the edge of one end of the branch coating 400, the difference between the area of the first mounting hole and the cross-sectional area of the branch coating 400 is smaller than the surface area of the connection coating 500, and it can be understood that, compared with the case where the main body coating 300 is directly connected to the branch coating 400, the movement range of the branch coating 400 can be greatly increased by providing the connection coating 500, that is, the branch coating 400 can be moved along the radial direction of the first mounting hole so as to adjust the position of the branch coating 400, thereby aligning the branch coating 400 with the corresponding branch pipe cavity.

That is, the main abdominal multi-branch stent provided by the application can adapt to various anatomical forms.

In one embodiment, as shown in fig. 1,2, 4 and 5, the main abdominal multi-branch stent further comprises a reference film 700, the side wall of the main body film 300 is further provided with a second mounting hole, one end of the reference film 700 is connected to the edge of the second mounting hole, and the other end extends toward a direction away from the main body film 300.

Specifically, the reference coating film 700 is disposed between the second metal frame 120 and the third metal frame 130, or the reference coating film 700 is disposed between the fifth metal frame 150 and the sixth metal frame 160.

It should be noted that the reference film 700 serves as a reference, and when the main abdominal multi-branch stent is mounted, the reference film 700 is directly aligned with the corresponding branch lumen, and then the positions of the other branch films 400 are adjusted, so that the reference film 700 does not need to be connected to the main body film 300 through the connection film 500.

Further, in an embodiment, as shown in fig. 1, 2, 4 and 5, the main abdominal multi-branch stent further comprises a reference stent 800, and the reference stent 800 is disposed on the outer surface or the inner surface or the inside of the side wall of the reference stent 700 to support the reference stent 700.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be determined from the following claims.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. The abdomen main multi-branch bracket is characterized by comprising a main support frame, a connecting support frame (200), a main body covering film (300), a branch covering film (400) and a connecting covering film (500), wherein the main body covering film (300) and the branch covering film (400) are both cylindrical, the connecting covering film (500) is annular surrounding the branch covering film (400), one or more first mounting holes are formed in the side wall of the main body covering film (300), and each branch covering film (400) is connected to the side edge of the first mounting hole through the corresponding connecting covering film (500);

the main support is used for supporting the main body covering film (300), a plurality of the main support are arranged along the axial direction of the main body covering film (300), and each main support is in a wave shape along the plane unfolding structure of the main body covering film (300) along the circumferential direction;

The connecting support frame (200) is used for supporting the connecting tectorial membrane (500), the connecting support frame (200) comprises a plurality of wave-shaped sections with peak values extending towards the direction far away from the branch tectorial membrane (400), and the wave-shaped sections are sequentially arranged along the circumferential direction of the connecting tectorial membrane (500) and are connected end to form a wave-shaped closed loop structure;

Defining a straight line parallel to the axis of the main body tectorial membrane (300) as a bus, defining the bus intersecting with the central axis of the connecting tectorial membrane (500) as an axial fold line, wherein the point at which the axial fold line intersects with the main support frame is a peak or a trough of the main support frame, and two points at which the axial fold line intersects with the wave-shaped closed-loop structure are two peaks or two troughs of the wave-shaped closed-loop structure which are axisymmetric with respect to the central axis of the connecting tectorial membrane (500), so that the abdomen main multi-branch support frame can be radially folded through the axial fold line.

2. The main abdominal multi-branch stent according to claim 1, wherein each of the main support frames has a simple harmonic shape along a planar deployment structure of the main body cover (300) in a circumferential direction.

3. The main abdominal multi-branch stent according to claim 1, wherein defining the central axis of the connecting stent graft (500) and the central axis of the main body stent graft (300) to form a vertical plane defines a straight line perpendicular to the vertical plane and intersecting the central axis of the connecting stent graft (500) as a radial fold line, the axial fold line being non-intersecting the main stent, the two points at which the radial fold line intersects the wave-shaped closed-loop structure being two peaks or two valleys of the wave-shaped closed-loop structure that are axisymmetric about the central axis of the connecting stent graft (500) so that the main abdominal multi-branch stent can be folded axially by the radial fold line.

4. The main abdominal multi-branch stent according to claim 3, wherein the number of the wave segments is four, and the wave segments are respectively defined as a first wave segment (210), a second wave segment (220), a third wave segment (230) and a fourth wave segment (240), and the first wave segment (210), the second wave segment (220), the third wave segment (230) and the fourth wave segment (240) are sequentially connected end to form the connecting support frame (200);

the axial fold line passes through a trough between the first band (210) and the fourth band (240) and the axial fold line passes through a trough between the second band (220) and the third band (230);

the radial fold line passes through a trough between the first band (210) and the second band (220), and the radial fold line passes through a trough between the third band (230) and the fourth band (240).

5. A main abdominal multi-branch stent according to claim 3, further comprising a branch stent (600), the branch stent (600) being for supporting the branch stent (400);

the branch support (600) is in a wave shape along a plane unfolding structure of the circumferential direction of the branch coating film (400), the axial folding line passes through a wave crest or a wave trough of the branch support (600), and the radial folding line passes through the wave crest or the wave trough of the branch support (600).

6. The main abdominal multi-branch stent according to claim 1, wherein the main body cover (300) includes a plurality of first annular void regions extending in the circumferential direction thereof, and the main body cover (300) further includes a plurality of second annular void regions extending in the circumferential direction thereof, the first annular void regions and the second annular void regions being alternately arranged in the axial direction of the main body cover (300);

the first annular pore region is provided with a plurality of densely distributed first pores, the second annular pore region is provided with a plurality of densely distributed second pores, and the pore diameter value of the first pores is larger than that of the second pores.

7. The main abdominal multi-branch stent of claim 1, wherein the main body cover (300) includes a first end (310) and a second end (320), the branch cover (400) being disposed between the first end (310) and the second end (320);

Along the direction from the first end (310) to the branch coating film (400), the plurality of main support frames are sequentially defined as a first metal frame body (110), a second metal frame body (120) and a third metal frame body (130), the planar unfolding structures of the first metal frame body (110), the second metal frame body (120) and the third metal frame body (130) along the circumferential direction of the main body coating film (300) are in simple harmonic waveforms, and the angular frequency of the unfolding structure of the first metal frame body (110) and the angular frequency of the unfolding structure of the second metal frame body (120) are smaller than the angular frequency of the unfolding structure of the third metal frame body (130);

Along the direction from the second end (320) to the branch coating film (400), a plurality of main support frames are sequentially defined as a fourth metal frame body (140), a fifth metal frame body (150) and a sixth metal frame body (160), the plane unfolding structures of the fourth metal frame body (140), the fifth metal frame body (150) and the sixth metal frame body (160) along the circumferential direction of the main body coating film (300) are in simple harmonic waveforms, and the angular frequency of the unfolding structures of the fourth metal frame body (140) and the angular frequency of the unfolding structures of the fifth metal frame body (150) are smaller than the angular frequency of the unfolding structures of the sixth metal frame body (160).

8. The abdominal main multi-branch stent according to claim 7, wherein the first metal frame body (110) and the fourth metal frame body (140) are arranged in mirror symmetry, or the first metal frame body (110) and the fourth metal frame body (140) are arranged in a periodic arrangement along the axial direction of the main body coating film (300);

And/or the second metal frame body (120) and the fifth metal frame body (150) are arranged in a mirror symmetry manner, or the second metal frame body (120) and the fifth metal frame body (150) are arranged in a periodic manner along the axial direction of the main body coating film (300);

and/or the third metal frame body (130) and the sixth metal frame body (160) are arranged in a mirror symmetry manner, or the third metal frame body (130) and the sixth metal frame body (160) are arranged in a periodic manner along the axial direction of the main body coating film (300);

And/or the first metal frame body (110) and the second metal frame body (120) are arranged in a mirror symmetry manner, or the first metal frame body (110) and the second metal frame body (120) are arranged in a periodic manner along the axial direction of the main body coating film (300);

And/or the fourth metal frame body (140) and the fifth metal frame body (150) are arranged in a mirror symmetry mode, or the fourth metal frame body (140) and the fifth metal frame body (150) are arranged in a periodic mode along the axial direction of the main body coating film (300).

9. The main abdominal multi-branch stent according to claim 7, wherein the third metal frame body (130) comprises a first wave-shaped stent (131) and a second wave-shaped stent (132), one of the first wave-shaped stent (131) and the second wave-shaped stent (132) is sleeved on the outer peripheral side of the other, or one of the first wave-shaped stent (131) and the second wave-shaped stent (132) is provided on the inner wall of the main body covering film (300), and the other is provided on the outer wall of the main body covering film (300);

the sixth metal frame body (160) comprises a third waveform support (161) and a fourth waveform support (162), wherein one of the third waveform support (161) and the fourth waveform support (162) is sleeved on the outer periphery side of the other, or one of the third waveform support (161) and the fourth waveform support (162) is arranged on the inner wall of the main body coating film (300), and the other is arranged on the outer wall of the main body coating film (300).

10. The main abdominal multi-branch stent according to claim 9, wherein the peaks of the first wave stent (131) and the peaks of the second wave stent (132) are staggered along the circumferential direction of the main body stent graft (300);

And/or, the wave crests of the third wave form bracket (161) and the wave crests of the fourth wave form bracket (162) are staggered along the circumferential direction of the main body coating film (300);

And/or, the wave crest of the first wave bracket (131) and the wave crest of the third wave bracket (161) are arranged opposite to each other along the circumferential direction of the main body coating film (300), or the wave crest of the first wave bracket (131) and the wave crest of the third wave bracket (161) are arranged in a staggered manner along the circumferential direction of the main body coating film (300);

and/or, the wave crest of the second wave-shaped bracket (132) and the wave crest of the fourth wave-shaped bracket (162) are arranged opposite to each other along the circumferential direction of the main body coating film (300), or the wave crest of the second wave-shaped bracket (132) and the wave crest of the fourth wave-shaped bracket (162) are arranged in a staggered manner along the circumferential direction of the main body coating film (300).

11. The main abdominal multi-branch stent according to claim 7, wherein the first metal frame body (110) comprises a fifth wave-shaped stent (111) and a sixth wave-shaped stent (112), one of the fifth wave-shaped stent (111) and the sixth wave-shaped stent (112) is sleeved on the outer peripheral side of the other, or one of the fifth wave-shaped stent (111) and the sixth wave-shaped stent (112) is provided on the inner wall of the main body covering film (300), and the other is provided on the outer wall of the main body covering film (300);

The fourth metal frame body (140) comprises a seventh waveform support (141) and an eighth waveform support (142), wherein one of the seventh waveform support (141) and the eighth waveform support (142) is sleeved on the outer periphery side of the other, or one of the seventh waveform support (141) and the eighth waveform support (142) is arranged on the inner wall of the main body coating film (300), and the other is arranged on the outer wall of the main body coating film (300).

12. The main abdominal multi-branch stent according to claim 11, wherein at least a portion of the peaks of the fifth wave stent (111) protrude from the end of the main body stent (300) along the axial direction of the main body stent (300);

And/or, at least part of the wave crest of the seventh wave bracket (141) protrudes out of the end part of the main body coating film (300) along the axial direction of the main body coating film (300).

13. The main abdominal multi-branch stent according to claim 1, wherein the diameter of the branch stent (400) is smaller than the inner diameter of the first mounting hole, and the axial direction of the main body stent (300) and the axial direction of the branch stent (400) are not arranged in parallel;

the connecting coating film (500) is in a round table shape, one end of the connecting coating film (500) is connected to the edge of the first mounting hole, the other end of the connecting coating film is towards the inner side of the main body coating film (300) and is connected to the edge of one end of the branch coating film (400), the branch coating film (400) is arranged on the outer side of the connecting coating film (500), and one end of the branch coating film (400) away from the connecting coating film (500) extends towards the direction away from the axis of the main body coating film (300).