CN113558708A - Bow covered stent and bow stent component - Google Patents
Bow covered stent and bow stent component Download PDFInfo
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- CN113558708A CN113558708A CN202111104127.4A CN202111104127A CN113558708A CN 113558708 A CN113558708 A CN 113558708A CN 202111104127 A CN202111104127 A CN 202111104127A CN 113558708 A CN113558708 A CN 113558708A
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- embedded portion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12027—Type of occlusion
- A61B17/12031—Type of occlusion complete occlusion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
- A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
- A61B17/12118—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm for positioning in conjunction with a stent
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/12159—Solid plugs; being solid before insertion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/12168—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device having a mesh structure
Abstract
The invention provides an arch part covered stent and an arch part stent component, which relate to the technical field of medical instruments and comprise a main body covered stent and an embedded part; the main body covered stent is tubular, and at least two side openings are arranged on the side wall of the main body covered stent; the embedded part is arranged in the lumen of the main body covered stent; the embedded part adopts a covered stent or a covered membrane, and is provided with an inner cavity which is communicated with the embedded part, and the inner cavity of the embedded part comprises an inlet and at least two outlets; the inner chamber entry of embedded portion is the entry of embedded portion, and the inner chamber export of embedded portion is the export of embedded portion: the quantity of side opening is more than or equal to the quantity of embedded portion export, and each embedded portion export corresponds the intercommunication respectively in a side opening. The invention solves the technical problem that the existing covered stent is not beneficial to the application of the intracavity interventional operation on the A-type interlayer or the aneurysm of the affected arch part.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an arch part covered stent and an arch part stent component.
Background
The aortic disease is a group of cardiovascular diseases seriously threatening human health, including aortic dissection, aortic aneurysm and the like, mainly caused by hypertension, arteriosclerosis, injury, infection and other reasons, has great threat to the life of a patient, particularly the aortic dissection which has wide range of pathological changes and influences blood supply of brain, spinal cord and multiple organs, has large operation trauma, complex operation, long time and much blood consumption, and has higher complication incidence rate and operation death rate of the operation, and the reconstruction of the blood supply of the aorta and the branch arteries thereof in the shortest possible time is always the target pursued by vascular surgeons.
A B-type interlayer or aneurysm of a lacerated position on descending aorta usually adopts an aorta intracavity repair technology with small wound and high success rate, a conveying system loaded with a covered stent is pushed to a diseased part through an aorta far end such as a human femoral artery incision, the covered stent is released and fixed, the diseased aneurysm or interlayer is isolated, a blood transport channel is reconstructed, and the treatment purpose is achieved. However, the more serious A-type dissections or aneurysms involving the arch still mainly adopt surgical methods for treatment at present, because the aortic vascular stent used in the current intracavity interventional therapy needs an anchoring area of at least 15mm close to the heart, when the existing stent is applied to treat the aortic vascular stent, the branched arterial vessels are blocked to different degrees, when the neck vessels are blocked, vascular bypass surgery needs to be performed, the trauma is large, and even the aortic vascular stent cannot be treated by the intracavity technology. At present, the problem of arch vascular reconstruction can be solved clinically through an arch stent windowing technology, a chimney technology and the like, but the physiological structures of 3 branch blood vessels of the aortic arch of each patient are different, so that the problems of complex operation, difficult positioning, high incidence of internal leakage, branch blood vessel occlusion and the like exist in both the windowing technology and the chimney technology, and the clinical popularization is difficult.
In more detail, 3 branch vessels of the aortic arch of each patient: the physiological structures of the innominate artery, the left common carotid artery and the left subclavian artery are different, and the distances among the openings of the three branch blood vessels, the arrangement angles and the thicknesses of the branch blood vessels are different, so that the shape of the combined bow-shaped blood vessel with the three branches is very different, different bow-shaped blood vessels cannot be completely matched through a prefabricated support, and once the support is not matched with the blood vessels, the intracavity repair treatment cannot be completed. At present, except customizing the support, the clinical problem of rebuilding in order to solve bow blood vessel mainly through bow support windowing technique, chimney technique and single branch support etc. to customizing the support, need customize aorta branch support very much according to patient's concrete anatomical situation, require when implanting aorta pathological change position aorta support blood vessel to aim at the branch artery with its side opening simultaneously, guarantee that branch artery blood flow is unobstructed, implant the little support in the branch artery again, but this kind of method has following shortcoming: the stent is specially customized according to the specific anatomical condition of a patient, the cost is high, the batch production cannot be realized, the time for customizing the stent is long, the stent cannot be used for an emergency operation patient, the operation is complex, each side hole is required to be respectively and accurately aligned to an involved branch artery when the stent is released, if the stent is deviated, the blood flow of the branch artery is possibly obstructed, corresponding complications occur, and the life can be threatened when the stent is serious; the chimney technology ensures the smoothness of the branch blood vessels by arranging a parallel naked stent or a covered stent in the covered branch blood vessels, so that the heart-proximal end opening of the branch blood vessels extends to the front of the aorta covered stent, the proximal anchoring area of the aorta covered stent is prolonged, but internal leakage is easy to generate due to the gap between the branch stent and the main stent; the windowing technology comprises in-vitro windowing and in-vivo in-situ windowing, the original complete straight-cylinder bracket is modified, the operation is complex, the technical requirement on a clinician is high, and certain risks exist; single branch stents can only address reconstruction of one branch at present due to individualized differences in vessels.
All of the above limits the application of the intraluminal interventional procedure to the treatment of type a dissections or aneurysms involving the arch.
Disclosure of Invention
The invention aims to provide an arch part covered stent and an arch part stent component, which are used for solving the technical problem that the existing covered stent is not beneficial to application of an intracavitary intervention operation on treating an A-type interlayer or aneurysm involving an arch part.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides an arch-shaped stent graft, including a main stent graft and an embedded portion; the main body covered stent is tubular, and at least two side openings are formed in the side wall of the main body covered stent; the embedded part is arranged in the lumen of the main body covered stent; the embedded part adopts a covered stent or a covered membrane, an inner cavity penetrating through the embedded part is arranged on the embedded part, and the inner cavity of the embedded part comprises an inlet and at least two outlets; use the inner chamber entry of embedded portion is the embedded portion entry, the inner chamber export of embedded portion is the embedded portion export: the quantity of side opening is more than or equal to the quantity of embedded portion export, and each the embedded portion export corresponds respectively and communicates in one the side opening.
The arch part covered stent provided by the embodiment has the advantages of simple structure, convenience for implantation, no need of treating the branch blood vessel of the arch part, simplicity and convenience for operation, capability of reconstructing blood supply of an aorta and a branch artery thereof in the shortest possible time, and capability of relieving the technical problem that the existing covered stent is not beneficial to application of an intra-cavity intervention operation on an A-type interlayer or aneurysm involved in treatment of the arch part.
Optionally, the inner cavity of the embedded portion includes a main cavity and at least two branch cavities, the inlet of the main cavity forms the inlet of the embedded portion, the inlets of the at least two branch cavities converge and communicate with the outlet of the main cavity, and the outlets of the branch cavities form the outlet of the embedded portion respectively.
Optionally, the total outlet cross-sectional area of each of the in-line section outlets is greater than the inlet cross-sectional area of the in-line section inlet.
Optionally, a plurality of connecting lines cover each of the side openings.
Further optionally, the plurality of connecting wires are arranged in a net.
Further optionally, the plurality of connecting wires include a first flat cable and a second flat cable, the first flat cable and the second flat cable respectively include a plurality of connecting wires which are parallel to each other and spaced from each other two by two, and the extending directions of the first flat cable and the second flat cable are different;
wherein: the first flat cable and the second flat cable are interwoven into a single-layer mesh structure; or one of the first flat cable and the second flat cable is positioned at the outer layer, and the other is positioned at the inner layer, so that an inner-outer double-layer net structure is formed.
In addition, optionally, in the case that the covering film on the main body covering film stent adopts a braided net-shaped film, the braiding density of the connecting wires is smaller than that of the covering film on the main body covering film stent.
Optionally, the arch stent graft further comprises a single-branch stent graft; the quantity of side opening is greater than the quantity of embedded portion export, the single branch tectorial membrane support is the tubulose, single branch tectorial membrane support's lumen entry edge sealing connect in one on the main part tectorial membrane support the open-sided edge.
Optionally, the embedded portions comprise at least two, at least two of the embedded portions being separated from each other.
In a second aspect, embodiments of the present disclosure provide an arch stent assembly comprising a single stent graft and the arch stent graft of any one of the preceding embodiments;
under the implantation state, monomer tectorial membrane support is in order from one the embedded portion export is inserted follow behind the inner chamber of embedded portion the mode that the embedded portion entry was worn out runs through the inner chamber of embedded portion, just monomer tectorial membrane support is located in the position of the inner chamber of embedded portion, monomer tectorial membrane support is close to the radial circumference outer wall laminating of embedded portion entry one end in the radial circumference wall of the inner chamber of embedded portion.
Because the arch stent assembly provided by the second aspect of the embodiment of the present invention includes the arch stent graft provided by the first aspect, the arch stent assembly provided by the second aspect of the embodiment of the present invention can achieve all the beneficial effects that the arch stent graft provided by the first aspect can achieve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is an external schematic view of the overall structure of an alternative embodiment of an arcuate stent graft according to embodiments of the present invention;
FIG. 2 is an external schematic view of the overall structure of another alternative embodiment of an arcuate stent graft according to embodiments of the present invention;
FIG. 3 is a schematic overall view of a first alternative embodiment of an embedded portion of an arch stent graft according to an embodiment of the present invention;
FIG. 4 is a schematic overall view of a second alternative embodiment of an embedded portion of an arch stent graft according to an embodiment of the present invention;
FIG. 5 is a schematic overall view of a third alternative embodiment in an arcuate stent graft according to an embodiment of the present invention;
FIG. 6 is an illustration of an implanted state of an arch stent assembly in a human vessel according to an alternative embodiment of the present invention, wherein the arch stent graft employs the arch stent graft shown in FIG. 2;
FIG. 7 is a schematic view of the single body stent graft of FIG. 6 through the inset shown in FIG. 4;
FIG. 8 is a schematic view of the single body stent graft of FIG. 6 through the inset shown in FIG. 5.
Icon: 1-main body covered stent; the 11-side opening; 2-an embedded part; 21-a main chamber; 211-inset entrance; 22-a branch chamber; 221-an inset portion outlet; 3-single branch covered stent; 4-monomer covered stent.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the present invention are used, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In particular, in the present invention, the term "proximal" refers to the end closer to the human heart during surgery, and "distal" refers to the end opposite the "proximal".
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Example one
The present embodiment provides an arch stent graft, which includes a main body stent graft 1 and an embedded portion 2, with reference to fig. 1 to 5. Specifically, the main body covered stent 1 is tubular, and at least two side openings 11 are arranged on the side wall of the main body covered stent 1; the embedded part 2 is arranged inside the tube cavity of the main body covered stent 1; the embedded part 2 adopts a covered stent or a covered membrane, an inner cavity which runs through the embedded part 2 is arranged on the embedded part 2, and the inner cavity of the embedded part 2 comprises an inlet and at least two outlets. The inner cavity inlet of the embedded part 2 is an embedded part inlet 211, and the inner cavity outlet of the embedded part 2 is an embedded part outlet 221: the number of the side openings 11 is larger than or equal to the number of the in-embedding portion outlets 221, and each of the in-embedding portion outlets 221 is correspondingly communicated with one side opening 11, respectively. Wherein, each inlet and outlet respectively refer to the inlet and outlet in the blood flowing direction after being implanted into the blood vessel of the human body.
When in use, the arch part covered stent is implanted into an arch part aorta, then the single covered stent 4 (i.e. a common clinical single-branch stent) is inserted into the inner cavity of the embedded part 2 from the embedded part outlet 221 and penetrates through the inner cavity of the embedded part 2 from the embedded part inlet 211 in a mode of penetrating out of the inner cavity of the embedded part 2 with reference to figures 6 to 8, in the part of the single covered stent 4 positioned in the inner cavity of the embedded part 2, the radial circumferential outer wall surface of one end of the single covered stent 4 close to the embedded part inlet 211 is jointed with the radial circumferential wall surface of the inner cavity of the embedded part 2, thereby closing the communication path between the in-stent inlet 211 and the other in-stent outlet 221, at which time blood can flow only along the single stent graft 4, the outlets 221 of other embedded parts and the side openings 11 corresponding to the outlets are all in a closed state, and the single covered stent 4 can reconstruct the blood supply of the related branch artery; when the number of the side openings 11 is larger than the number of the insertion portion outlets 221, blood may flow out from the side openings 11 of the main stent graft 1, which do not communicate with the insertion portion outlets 221, so as to correspond to other branch vessel channels.
The arch part covered stent provided by the embodiment has the advantages of simple structure, convenience for implantation, no need of treating the branch blood vessel of the arch part, simplicity and convenience for operation, capability of reconstructing blood supply of an aorta and a branch artery thereof in the shortest possible time, and capability of relieving the technical problem that the existing covered stent is not beneficial to application of an intra-cavity intervention operation on an A-type interlayer or aneurysm involved in treatment of the arch part. In the present embodiment, the specific shape of each of the side opening 11, the embedded portion inlet 211, and the embedded portion outlet 221 may be, but is not limited to, a diamond shape, an oval shape, a rounded rectangle shape, and the like, and is not limited thereto.
In the present embodiment, the embedded portions 2 include one or at least two, when the embedded portions 2 include at least two (in the case that the embedded portions 2 include at least two, the term mainly includes two or three embedded portions 2 when used in the aortic arch), the at least two embedded portions 2 are separated from each other, and the at least two embedded portions 2 may respectively correspond to at least two branch arteries to reconstruct blood supply of the aorta and the at least two branch arteries thereof.
In addition, in some alternative embodiments of the present embodiment, the number of the side openings 11 is larger than the number of the embedded portion outlets 221, and specifically, as an alternative structure, the side openings 11 of the main body stent graft 1 that do not correspond to the embedded portion outlets 221 are in a window structure, and the window structure corresponds to other branch vascular flow paths; as another alternative, as shown in FIG. 2, the arch stent graft further includes a single-branch stent graft 3; wherein, the quantity of side opening 11 is greater than the quantity of embedded portion export 221, and single branch covered stent 3 is the tubulose, and single branch covered stent 3's lumen entry edge sealing connection is in the edge of main part covered stent 1 one side opening 11, and single branch covered stent 3 corresponds to other branch vascular flow paths.
In this embodiment, in some optional embodiments of the embedded portion 2, as shown in fig. 3, the inner cavity of the embedded portion 2 is an overall non-branched cavity, and the outlets 221 of adjacent embedded portions are communicated with each other through a narrow channel; in other alternative embodiments of the embedded portion 2, as shown in fig. 4 and 5, the inner cavity of the embedded portion 2 includes a main cavity 21 and at least two branch cavities 22, the inlet of the main cavity 21 forms an embedded portion inlet 211, the inlets of the at least two branch cavities 22 converge and communicate with the outlet of the main cavity 21, the outlets of the branch cavities 22 respectively form an embedded portion outlet 221, and the adjacent branch cavities 22 do not communicate with each other except for the inlet and outlet portions of the branch cavities 22.
Further, in the present embodiment, the total outlet cross-sectional area of the respective embedded portion outlets 221 is larger than the inlet cross-sectional area of the embedded portion inlet 211.
In addition, in some optional embodiments of the present embodiment, it is preferable that each of the side openings 11 is covered with a plurality of connecting lines, and it is further preferable that the plurality of connecting lines are arranged in a mesh; furthermore, the plurality of connecting wires comprise a first flat cable and a second flat cable, the first flat cable and the second flat cable respectively comprise a plurality of connecting wires which are parallel to each other and are spaced from each other pairwise, and the extending directions of the first flat cable and the second flat cable are different; wherein: the first flat cable and the second flat cable are mutually woven in an internally and externally staggered manner to form a single-layer net structure; or one of the first flat cable and the second flat cable is positioned at the outer layer, and the other is positioned at the inner layer, so that an inner-outer double-layer net structure is formed. Preferably, in the case that the covering film on the main body covered stent 1 is a woven mesh film, the weaving density of the connecting wires is less than that of the covering film on the main body covered stent 1, and in these alternative embodiments of the present embodiment, the connecting wires are preferably, but not limited to, yarns, and the specific number of the plurality of connecting wires is not particularly limited.
In these alternative embodiments, a plurality of connecting lines are arranged on each side opening 11, so that firstly, a guide wire and a guide head can conveniently penetrate through a weaving gap and then penetrate through the corresponding side opening 11 to further guide and penetrate through the single covered stent 4 without membrane rupture, and secondly, the single covered stent 4 penetrating through the side opening 11 can be tightly supported and fixed to avoid blood leakage; thirdly, in some special cases, for example but not limited to, the radial circumferential outer wall surface of the single stent graft 4 near one end of the embedded part inlet 211 is not completely attached to the radial circumferential wall surface of the inner cavity of the embedded part 2, so that the communication path between the embedded part inlet 211 and other embedded part outlets 221 is not completely closed, and thus when less blood leaks into other embedded part outlets 221, the side openings 11 corresponding to the other embedded part outlets 221 are blocked to some extent, and the blood embolization is promoted, so that the problem of blood leakage is alleviated.
Example two
The present embodiment provides an arch stent assembly, which, with reference to fig. 6 to 8 in combination with fig. 1 to 5, comprises a single stent graft 4 and an arch stent graft according to any one of the alternative embodiments.
Under the implantation state, the single covered stent 4 penetrates through the inner cavity of the embedded part 2 in a mode of penetrating out of the embedded part inlet 211 after being inserted into the inner cavity of the embedded part 2 from one embedded part outlet 221, the single covered stent 4 is positioned in the position of the inner cavity of the embedded part 2, and the radial circumferential outer wall surface of one end, close to the embedded part inlet 211, of the single covered stent 4 is attached to the radial circumferential wall surface of the inner cavity of the embedded part 2.
Because the arch stent assembly provided by the present embodiment includes the arch stent graft described in the first embodiment, the arch stent assembly provided by the present embodiment can achieve all the advantageous effects that the arch stent graft can achieve in the first embodiment, and the more specific structure and the achievable effects thereof can be obtained with reference to each optional or preferred embodiment in the first embodiment.
Finally, it should be noted that: the embodiments in the present description are all described in a progressive manner, each embodiment focuses on the differences from the other embodiments, and the same and similar parts among the embodiments can be referred to each other; the above embodiments in the present specification are only used for illustrating the technical solutions of the present invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An arch part covered stent is characterized by comprising a main body covered stent (1) and an embedded part (2);
the main body covered stent (1) is tubular, and at least two side openings (11) are formed in the side wall of the main body covered stent (1);
the embedded part (2) is arranged in the lumen of the main body covered stent (1); the embedded part (2) adopts a covered stent or a covered membrane, an inner cavity penetrating through the embedded part (2) is arranged on the embedded part (2), and the inner cavity of the embedded part (2) comprises an inlet and at least two outlets;
the inner cavity inlet of the embedded part (2) is used as an embedded part inlet (211), and the inner cavity outlet of the embedded part (2) is used as an embedded part outlet (221): the number of the side openings (11) is greater than or equal to the number of the embedded portion outlets (221), and each of the embedded portion outlets (221) is correspondingly communicated with one of the side openings (11), respectively.
2. The arch stent graft of claim 1, wherein the inner cavity of the embedded portion (2) comprises a main cavity (21) and at least two branch cavities (22), the inlet of the main cavity (21) forms the embedded portion inlet (211), the inlets of the at least two branch cavities (22) converge and communicate with the outlet of the main cavity (21), and the outlet of each branch cavity (22) forms the embedded portion outlet (221).
3. The arch stent graft of claim 1, wherein the total exit cross-sectional area of each of the in-graft exits (221) is greater than the entrance cross-sectional area of the in-graft entrance (211).
4. The arch stent graft of claim 1, wherein each of the side openings (11) is covered with a plurality of connecting wires.
5. The arch stent graft of claim 4, wherein the plurality of connecting wires are in a mesh arrangement.
6. The arch stent graft of claim 5, wherein the plurality of connecting wires comprise a first flat wire and a second flat wire, the first flat wire and the second flat wire each comprising a plurality of connecting wires parallel to each other and spaced apart from each other two by two, the first flat wire and the second flat wire extending in different directions;
wherein: the first flat cable and the second flat cable are interwoven into a single-layer mesh structure; or one of the first flat cable and the second flat cable is positioned at the outer layer, and the other is positioned at the inner layer, so that an inner-outer double-layer net structure is formed.
7. The arch stent graft of claim 5, wherein in the case of a braided mesh membrane being used as the cover on the main stent graft (1), the braid density of the connecting wires is less than the braid density of the cover on the main stent graft (1).
8. The arch stent graft of claim 1, wherein the arch stent graft further comprises a single-branch stent graft (3);
the quantity of side opening (11) is greater than the quantity of embedded portion export (221), single branch tectorial membrane support (3) are the tubulose, the lumen entry edge sealing connection of single branch tectorial membrane support (3) in main part tectorial membrane support (1) last one the edge of side opening (11).
9. The arch stent graft of claim 1, wherein the embedded portion (2) comprises at least two, at least two of the embedded portions (2) being separated from each other.
10. An arch stent assembly comprising a single stent graft (4) and the arch stent graft of any one of claims 1 to 9;
under the implantation state, monomer tectorial membrane support (4) are in order from one embedded portion export (221) are inserted follow behind the inner chamber of embedded portion (2) the mode that embedded portion entry (211) were worn out runs through the inner chamber of embedded portion (2), just monomer tectorial membrane support (4) are located in the position of the inner chamber of embedded portion (2), monomer tectorial membrane support (4) are close to the radial circumference outer wall surface laminating in of embedded portion entry (211) one end the radial circumference wall surface of the inner chamber of embedded portion (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111104127.4A CN113558708A (en) | 2021-09-22 | 2021-09-22 | Bow covered stent and bow stent component |
| CN202220158859.5U CN217138365U (en) | 2021-09-22 | 2022-01-20 | Bow covered stent and bow stent component |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111104127.4A CN113558708A (en) | 2021-09-22 | 2021-09-22 | Bow covered stent and bow stent component |
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| CN113558708A true CN113558708A (en) | 2021-10-29 |
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| CN202220158859.5U Active CN217138365U (en) | 2021-09-22 | 2022-01-20 | Bow covered stent and bow stent component |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US20140094902A1 (en) * | 2005-02-17 | 2014-04-03 | Khoury Medical Devices, Llc | Vascular endograft |
| US20090048663A1 (en) * | 2007-08-08 | 2009-02-19 | Greenberg Roy K | Branched stent graft system |
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| CN217138365U (en) | 2022-08-09 |
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