WO2008119837A2 - Bendable stent - Google Patents
Bendable stent Download PDFInfo
- Publication number
- WO2008119837A2 WO2008119837A2 PCT/EP2008/054007 EP2008054007W WO2008119837A2 WO 2008119837 A2 WO2008119837 A2 WO 2008119837A2 EP 2008054007 W EP2008054007 W EP 2008054007W WO 2008119837 A2 WO2008119837 A2 WO 2008119837A2
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- WO
- WIPO (PCT)
- Prior art keywords
- stent
- adjacent
- struts
- cusps
- cusp
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/89—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/91508—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other the meander having a difference in amplitude along the band
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/9155—Adjacent bands being connected to each other
- A61F2002/91558—Adjacent bands being connected to each other connected peak to peak
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0028—Shapes in the form of latin or greek characters
- A61F2230/0054—V-shaped
Definitions
- This invention relates to radially expansible stents for transluminal delivery to a stenting site within the body of a patient, the stent having an enhanced capacity for bending, after deployment in the body.
- the present applicant is a specialist in the manufacture of stents of nickel-titanium shape memory alloy, manufactured from a raw material that is a tubular workpiece of that alloy.
- the alloy tube workpiece is subjected to a laser-cutting step in which the laser cuts a multiplicity of slits in the tubular workpiece.
- Each slit extends through the entire wall thickness of the tube, and for the most part, the slits all have the same length and are all parallel to the longitudinal axis of the tubular workpiece.
- each slitted tube When one advances around the circumference of the tubular workpiece, crossing transversely over a multiplicity of the slits, one by one, alternate slits that one crosses are staggered, in the axial direction of the tube, by a distance that is around half the length of each slit.
- each slitted tube When such a slitted tube is slipped over a mandrel, and expanded radially, each slit opens out into a diamond-shaped aperture in the wall thickness of the tube.
- the creation of the slits at the same time creates struts of material that lie between adjacent slits, and the struts in the radially expanded tube emerge as zig-zag stenting rings with a characteristic strut length within any one zig-zag ring that is more or less half the length of each of the slits cut by the laser.
- zig-zag stent matrix For enhanced flexibility of the zig-zag stent matrix, many of the "connector portions" between facing cusps of adjacent zig-zag stenting rings can be parted, to leave only a few (typically four or less) connector bridges between any two axially adjacent zig-zag stenting rings. See our WO94/17754.
- the surviving connector bridges have a length direction parallel to the longitudinal axis of the stent matrix.
- Self-expanding stents of nickel-titanium shape memory alloy are not particularly radiopaque and so are often equipped with radiopaque markers, of which one favoured material is tantalum because it is close to the nickel-titanium alloy in electrochemical potential, thereby minimising galvanic corrosion in the electrolyte of a bodily fluid.
- Self-expanding stents are usually deployed by proximal withdrawal of a sheath of a catheter delivery system.
- the present inventor knows that one way to manage that peak stress is to build the stent so that the end zone has all its cusps touching a notional circle transverse to the longitudinal axis of the stent, so that the stress form the pushing annulus is shared equally amongst all those cusps.
- a stent with such an end zone see WO 2006/047977.
- EP-A-1767240 offers ways to increase the flexibility of a stent in its radially compact delivery disposition. It suggests resorting to portions not parallel to the stent length, such as struts that are curved, or bridges that are skewed to the long axis of the stent.
- the invention takes the form of a laser-cut stent in which the slits cut by the laser in the tubular workpiece that is the precursor of the stent are staggered with respect to each other, in the length direction of the stent cylinder such that the slits cut by the laser are, in general, all the same length but the struts created by cutting the laser slits are not all the same length because the axial stagger between clrcumferentially adjacent slits is arranged to be something other than half the common slit length.
- Fig. 1 is a view from above, of a slitted tube opened out flat
- Fig. 2 shows a portion of the matrix of Fig. 1, radially expanded (but also opened out flat)
- Fig. 3 shows another embodiment of slitted tube opened out flat
- Fig. 4 shows the Fig. 3 strut matrix, opened out flat, and expanded, and
- Fig. 5 is a perspective view of the Fig. 4 strut matrix, not opened out flat
- Fig. 6 is a view of another slitted tube opened out flat
- Fig. 7 is a view of the slitted tube of Fig. 6, radially expanded and opened out flat and Fig. 8 is a perspective view of the radially expanded tube of Figs. 6 and 7;
- Fig. 9 is a view from above, like that of Figs. 1, 3 and 6 but of yet another embodiment of a slitted tube opened out flat.
- a slitted tube 10 opened out flat by parting the slitted tube at interface portions 12, 14 and 16 to display, opened out flat, a succession of stenting rings I, II, III, IV arranged next to each other along the length of the slitted tube parallel to its long axis direction X.
- Each of the four stenting rings exhibits a serial progression of n ⁇ struts, here 24 struts, (20) separated from each other by the slits through the wall thickness of the tubular workpiece, the succeeding struts of each stenting ring being joined by successive cusps 24.
- n ⁇ struts here 24 struts
- each cusp is in "head-to-head” relationship, along the axis direction X of the slitted tube, with a cusp of the adjacent stenting ring.
- each stenting ring is connected to the next adjacent stenting ring by four bridges 26 distributed at regular intervals (90° ⁇ around the circumference of the slitted tube.
- a strut matrix made by slitting a precursor tube is conventional.
- Fig. 2 we see a portion of the Fig. 1 slitted tube radially expanded so that the struts of each stenting ring are inclined to the axial direction X and present themselves as a zig-zag sequence of struts around the circumference of the stent. It will be noted that the cusps 24 of adjacent stenting rings are still in head-to-head disposition. Skilled readers will appreciate that any gross bending of a deployed stent is liable to bring opposing cusps on the inside of the bend into physical contact with each other.
- each cusp 24 is in head-to-head relationship with a cusp of the next adjacent stenting ring.
- each stenting ring is connected to the next adjacent stenting ring by four bridges 26.
- the slits 22 in the tube 10, that have created the strut matrix are axially staggered relative to each other, in a way which is not present in drawing Fig. 1.
- this axial staggering there is also axial staggering of the gaps 30 between each pair of facing cusps 24.
- Fig. 3 there is shown a greater axial separation between facing cusps 24 than is apparent from Fig. 1, but this is not the decisive difference between the Fig. 1 concept and that of Fig, 3.
- each cusp points towards a gap between two adjacent cusps of the adjacent zig-zag stenting ring.
- each cusp is free to advance axially into the gap between two adjacent cusps of the adjacent stenting ring, rather than striking, head on, the facing cusp of the adjacent stenting ring, as in Fig. 2.
- Fig. 5 is a perspective view but shows the same phenomenon as is drawn in drawing Fig. 4, with the same strut matrix.
- each stenting ring need not be 24, and the number of bridges between adjacent stenting rings need not be four.
- Another arrangement that shows promise is one in which each stenting ring has 42 struts and adjacent stenting rings are connected by three bridges distributed at 120° intervals. Such an arrangement is shown in Fig. 9, and is described below.
- Figs. 6, 7 and 8 show another attractive design, namely, a slitted tube with 40 struts per ring and four bridges. Since other aspects of the design are described above with reference to Figs. 3 and 4, the same reference numbers are used to identify corresponding features of the design. Again, it can be seen that when the Fig. 6 slitted tube is opened out radially, the cusps 24 automatically move to positions where they are no longer facing head to head any cusp of the adjacent zig-zag stenting ring, with consequential advantages of avoiding cusp to cusp contact when the deployed stent is subjected to bending deformation.
- Bridges Bl and B3 connect loop III to loop IV.
- Bridge B2 is one of the four bridges that connect loop III.
- Between bridges Bl and B2 , and between bridge B2 and B3 is a sequence of five struts.
- Three of these struts Sl, S2 , S3, have the same length. Each extends between two free cusps.
- the other two struts, S4 and S5, have lengths different from each other. This length difference is what takes the free cusps of adjacent loops out of a head-to-head facing relationship in the expanded configuration of the stent, as can be understood from Figs. 7 and 8, which also reveal that the bridges are correspondingly skewed, relative to the long axis of the stent, in the expanded disposition of the stent.
- the lengthwise staggering of cusps that characterises the present invention can deliver useful technical effects that include the following.
- the design features non-identical proximal and distal ends, so that it is critically important to load the stent in the delivery system with its distal end nearer the distal end of the delivery system.
- An advantage of the present invention is that it permits the building of stents with identical distal and proximal ends, that are indifferent to the choice of stent end to lie closer to the distal end of the delivery system.
- the axial staggering opens up possibilities for "recesses” such as recesses 40 in Fig 3, where radiopaque marker elements 50 can be located. These elements thus lie snug between circumferentlally spaced apart cusps 42, 44 and axially adjacent to Intervening cusps 46, to which it will be convenient to attach the marker. Any axial pushing on the stent, while the confining sleeve is withdrawn, is customarily applied to the end surface of the stent.
- Fig. 3 shows one possible arrangement of tantalum markers 60, 62, 64, 66 which is not far from an even distribution in the compact form of the stent (although further from evenly distributed when the stent is expanded) .
- Fig. 9 design it is clear that each end of the stent offers only three recesses for installation of a set of three markers evenly distributed around the circumference of the stent .
- the markers can be of different shapes, in order to meet these design objectives, as is illustrated in Fig. 6, as one example.
- the present invention delivers a simple pattern of linear slits in the compact configuration that exhibits in each stenting loop a sequence of stepwise displacements, up and down the axis of the stent, in the positions of the free cusps, yet, in the expanded disposition of the stent, the axial steps are gone. Instead, the bridges are skewed, and the free cusps are circumferentialIy displaced, relative to the free cusps of the adjacent stenting loop that were facing them, head-to- head, in the compact disposition.
- the zig-zag struts of each stenting rings march around the circumference of the lumen in a progression in which axial displacement of free cusps, relative to each other, is difficult to discern.
- the stenting loops deploys in a way that is close to an optimal planar hoop, transverse t the axis, for generating a large mechanical radially outward stenting force.
- Applicant's WO2007/135090 discloses a stent that is "bend- capable" in that cusps move out of a "head-to-head” facing relationship in the expanded deployed stent, when the stent tube is bent out of a straight configuration. It will be apparent to the skilled reader that the present invention (lengthwise staggering of cusps) can be combined with the invention of WO2007/135090 (skewed unit cell) to deliver a stent matrix that avoids a head to head facing relationship of cusps, regardless of the extent to which the stent is bent out of a straight line after deployment .
- One way to accomplish the result explained in WO2007/135090 is to arrange the strut matrix such that n s /2 is an even number.
- the stents taught in this disclosure can be used in the same way as prior art stents are used. They can carry graft material, or drugs, for example. They can be delivered transluminalIy, by a suitable catheter delivery system. They can carry radiopaque markers, as is taught in the state of the art. They will find particular application in situations where the stent, after deployment, is subject to a high degree of bending.
- the present drawings show specific embodiments which are to be assessed as exemplary, not limiting.
- the stent need not be made from shape memory metal and need not be laser cut.
- the inventive concept disclosed herein is applicable to a wide range of known stent technologies.
Abstract
A stent formed by slitting a tube to create a matrix of struts, the slitted tube being radially expandable to a stenting disposition in which the struts exhibit a zig-zag pattern in successive loops around the circumference of the stent, the zig-zag pattern exhibiting a cusp between any two adjacent struts, with selected tied cusps of any one loop being connected by a bridge to a facing cusp of the adjacent loop and with intervening free cusps, characterised by lengthwise staggering of circumferentially adjacent said slits within said loops, wherein any two struts that are contiguous with a said tied cusp are of different lengths and any strut that extends from one free cusp to another free cusp has the same length as any other such strut such that, in the said stenting disposition, the free cusps of adjacent loops are circumferentially displaced from each other.
Description
Bendable Stent
Field of the Invention
This invention relates to radially expansible stents for transluminal delivery to a stenting site within the body of a patient, the stent having an enhanced capacity for bending, after deployment in the body.
There are some stenting sites within the body in which there is substantial deformation of the lumen that is stented. Consider, for example, a peripheral vascular stent at a site near the knee. When an expanded stent suffers severe bending, there can be buckling on the inside of the bend. Even before there is any catastrophic buckling, the likelihood exists that portions of the stent matrix, spaced apart along the axis of the stent lumen, will approach each other and impact, on the inside of any temporary tight bend, to the detriment not only of the tissue caught between the impacting portions of the stent, but also the stent matrix itself. It is an object to the present invention to ameliorate this problem.
Background of the Invention
The present applicant is a specialist in the manufacture of stents of nickel-titanium shape memory alloy, manufactured from a raw material that is a tubular workpiece of that alloy. To make the stent matrix, the alloy tube workpiece is subjected to a laser-cutting step in which the laser cuts a multiplicity of slits in the tubular workpiece. Each slit extends through the entire wall thickness of the tube, and for the most part, the slits all have the same length and are
all parallel to the longitudinal axis of the tubular workpiece. When one advances around the circumference of the tubular workpiece, crossing transversely over a multiplicity of the slits, one by one, alternate slits that one crosses are staggered, in the axial direction of the tube, by a distance that is around half the length of each slit. When such a slitted tube is slipped over a mandrel, and expanded radially, each slit opens out into a diamond-shaped aperture in the wall thickness of the tube. Looked at in another way, the creation of the slits at the same time creates struts of material that lie between adjacent slits, and the struts in the radially expanded tube emerge as zig-zag stenting rings with a characteristic strut length within any one zig-zag ring that is more or less half the length of each of the slits cut by the laser.
Where two struts, next adjacent within the circumference of a zig-zag ring, come together, we can call this a "cusp". The cusps of each zig-zag ring are contiguous with cusps of the next adjacent stenting ring.
For enhanced flexibility of the zig-zag stent matrix, many of the "connector portions" between facing cusps of adjacent zig-zag stenting rings can be parted, to leave only a few (typically four or less) connector bridges between any two axially adjacent zig-zag stenting rings. See our WO94/17754. The surviving connector bridges have a length direction parallel to the longitudinal axis of the stent matrix.
However, where these connector bridges have been removed, there are still cusps of adjacent zig-zag stenting rings that are effectively "head to head" across the narrow gap with a cusp belonging to the adjacent zig-zag ring. When such a narrow gap is on the inside of the bend, upon bending the expanded stent (by movement of the body after the stent has been placed in the body) , there is the likelihood of the two
cusps head to head impacting on each other. It is common to call this "peak to peak" .
In this discussion, it is important to distinguish between the radially compact trans-luminal delivery disposition of the stent matrix (not very different from the as-cut disposition of the stent matrix, before expansion on the mandrel to diamond-shaped apertures) and the radially expanded and deployed configuration of the stent, where the struts form zig-zag rings. A head to head facing configuration of parted connector portion cusps is tolerable for the delivery procedure but to be avoided, if that is feasible, after stent deployment and radial expansion.
The present applicant has been interested in this objective for some years . For a previous proposal for improvements see its WO 01/76508, published October 18, 2001. The present invention represents a fresh approach to the problem and, it is thought, a more elegant solution.
Other makers of stents have concerned themselves with the same objective. See for example US2004/0073290 Al where (paragraph 0002} it is explained that "if adjacent rings are spaced too close together" then "interference can occur between adjacent rings on the inside of a bend". Clearly, the idea of spacing the axially adjacent rings further apart has limited appeal, because it leaves the space between the rings unstented.
Self-expanding stents of nickel-titanium shape memory alloy are not particularly radiopaque and so are often equipped with radiopaque markers, of which one favoured material is tantalum because it is close to the nickel-titanium alloy in electrochemical potential, thereby minimising galvanic corrosion in the electrolyte of a bodily fluid.
Self-expanding stents are usually deployed by proximal withdrawal of a sheath of a catheter delivery system. To prevent the stent moving proximally with the withdrawing sheath, it is conventional to use a pushing annulus, that abuts the proximal end zone of the stent and resists any proximal movement of the stent relative to the stent delivery catheter as such. As stent performance and length go up, so does the compressive stress imposed on the end zone of the stent by the pushing annulus during withdrawal. It is important to avoid imposing on any part of the end zone a magnitude of stress higher than that of the design performance limits for that stent. The present inventor knows that one way to manage that peak stress is to build the stent so that the end zone has all its cusps touching a notional circle transverse to the longitudinal axis of the stent, so that the stress form the pushing annulus is shared equally amongst all those cusps. For an example of a stent with such an end zone, see WO 2006/047977.
EP-A-1767240 offers ways to increase the flexibility of a stent in its radially compact delivery disposition. It suggests resorting to portions not parallel to the stent length, such as struts that are curved, or bridges that are skewed to the long axis of the stent.
Summary of the... Invention
The present invention is defined in the claims below in which different aspects are presented in respective independent claims, and dependent claims are directed to optional or preferred features. In one embodiment, the invention takes the form of a laser-cut stent in which the slits cut by the laser in the tubular workpiece that is the precursor of the stent are staggered with respect to each other, in the length direction of the stent cylinder such that the slits cut by the laser are, in general, all the same length but the struts created by cutting the laser slits are not all the same
length because the axial stagger between clrcumferentially adjacent slits is arranged to be something other than half the common slit length. However, as the accompanying drawings will reveal, even when many of the slits can be made free of axial displacement (staggering) relative to the circumferentially next adjacent slits, the effect of eliminating head to head cusps on adjacent stenting rings can still be accomplished. As long as some of the adjacent slits are staggered, by an amount other than a one half slit length, the necessary circumferential displacement of facing cusps away from each other can still be achieved, as the slitted tube undergoes radial expansion.
Brief description of the drawings
Fig. 1 is a view from above, of a slitted tube opened out flat
Fig. 2 shows a portion of the matrix of Fig. 1, radially expanded (but also opened out flat)
Fig. 3 shows another embodiment of slitted tube opened out flat and
Fig. 4 shows the Fig. 3 strut matrix, opened out flat, and expanded, and
Fig. 5 is a perspective view of the Fig. 4 strut matrix, not opened out flat
Fig. 6 is a view of another slitted tube opened out flat and
Fig. 7 is a view of the slitted tube of Fig. 6, radially expanded and opened out flat and
Fig. 8 is a perspective view of the radially expanded tube of Figs. 6 and 7; and
Fig. 9 is a view from above, like that of Figs. 1, 3 and 6 but of yet another embodiment of a slitted tube opened out flat.
Detailed description
Referring to Fig. 1, we see a slitted tube 10, opened out flat by parting the slitted tube at interface portions 12, 14 and 16 to display, opened out flat, a succession of stenting rings I, II, III, IV arranged next to each other along the length of the slitted tube parallel to its long axis direction X. Each of the four stenting rings exhibits a serial progression of n^ struts, here 24 struts, (20) separated from each other by the slits through the wall thickness of the tubular workpiece, the succeeding struts of each stenting ring being joined by successive cusps 24. In the unexpanded slitted configuration of Fig. 1, each cusp is in "head-to-head" relationship, along the axis direction X of the slitted tube, with a cusp of the adjacent stenting ring. As can be seen, each stenting ring is connected to the next adjacent stenting ring by four bridges 26 distributed at regular intervals (90°} around the circumference of the slitted tube. The number of bridges per ring is n^ and the number of struts between successive bridges is ns so: nt = ns • nb.
In stent technology, particularly stents made of shape memory alloy (NITINOL) , a strut matrix made by slitting a precursor tube is conventional.
Turning to Fig. 2, we see a portion of the Fig. 1 slitted tube radially expanded so that the struts of each stenting ring are inclined to the axial direction X and present themselves as a zig-zag sequence of struts around the
circumference of the stent. It will be noted that the cusps 24 of adjacent stenting rings are still in head-to-head disposition. Skilled readers will appreciate that any gross bending of a deployed stent is liable to bring opposing cusps on the inside of the bend into physical contact with each other.
Turning to Fig. 3, we can recognise the same pattern of 24 struts 20 making up 4 adjacent stenting rings I, II, III, IV, recognisably equivalent to what is shown in Fig. 1. Further, just as in Fig. 1, each cusp 24 is in head-to-head relationship with a cusp of the next adjacent stenting ring. Just as in Fig. 1, each stenting ring is connected to the next adjacent stenting ring by four bridges 26.
However, the slits 22 in the tube 10, that have created the strut matrix, are axially staggered relative to each other, in a way which is not present in drawing Fig. 1. In consequence of this axial staggering, there is also axial staggering of the gaps 30 between each pair of facing cusps 24. In Fig. 3, there is shown a greater axial separation between facing cusps 24 than is apparent from Fig. 1, but this is not the decisive difference between the Fig. 1 concept and that of Fig, 3.
Reverting to Fig. 1, and concentrating on a pair of struts defining between them an individual gap 22, one can see that the axial length of the two struts, one each side of the slit 22, is the same. However, when we look at Fig. 3, and a particular slit 22, we notice that the length of the strut that extends down each side of the slit 22, from the common cusp 24 at one end of the slit, are different. This has repercussions for the way the struts deform when the slitted tube of Fig. 3 is radially expanded, to the zig-zag pattern shown in Fig. 4.
Comparing Fig. 4 with Fig. 2, it is immediately evident that there are no longer pairs of cusps 24 facing each other, head to head. Instead, each cusp points towards a gap between two adjacent cusps of the adjacent zig-zag stenting ring. The skilled reader will appreciate that when the stent of Fig. 4 is bent (into a banana shape) each cusp is free to advance axially into the gap between two adjacent cusps of the adjacent stenting ring, rather than striking, head on, the facing cusp of the adjacent stenting ring, as in Fig. 2.
Fig. 5 is a perspective view but shows the same phenomenon as is drawn in drawing Fig. 4, with the same strut matrix.
The skilled reader will grasp that the number of struts in each stenting ring need not be 24, and the number of bridges between adjacent stenting rings need not be four. Another arrangement that shows promise is one in which each stenting ring has 42 struts and adjacent stenting rings are connected by three bridges distributed at 120° intervals. Such an arrangement is shown in Fig. 9, and is described below.
Figs. 6, 7 and 8 show another attractive design, namely, a slitted tube with 40 struts per ring and four bridges. Since other aspects of the design are described above with reference to Figs. 3 and 4, the same reference numbers are used to identify corresponding features of the design. Again, it can be seen that when the Fig. 6 slitted tube is opened out radially, the cusps 24 automatically move to positions where they are no longer facing head to head any cusp of the adjacent zig-zag stenting ring, with consequential advantages of avoiding cusp to cusp contact when the deployed stent is subjected to bending deformation.
In Fig. 6, in loop III, three successive bridges are labelled Bl, B2, B3. Bridges Bl and B3 connect loop III to loop IV. Bridge B2 is one of the four bridges that connect loop III. Between bridges Bl and B2 , and between bridge B2 and B3 , is a
sequence of five struts. Three of these struts Sl, S2 , S3, have the same length. Each extends between two free cusps. The other two struts, S4 and S5, have lengths different from each other. This length difference is what takes the free cusps of adjacent loops out of a head-to-head facing relationship in the expanded configuration of the stent, as can be understood from Figs. 7 and 8, which also reveal that the bridges are correspondingly skewed, relative to the long axis of the stent, in the expanded disposition of the stent.
The lengthwise staggering of cusps that characterises the present invention can deliver useful technical effects that include the following.
When a self-expanding strut is to be released from its catheter delivery system, the usual way is to withdraw proximally, relative to the stent, a restraining sheath that surrounds its abluminal surface. When all cusps in a loop are at the same point along the axis of the stent, all can spring radially outwardly from the sheath simultaneously. This impulsive release is not ideal for controlled release. Axial staggering of cusps can assist in releasing the stent more progressively and steadily, cusps escaping one by one from the inward radial confinement of the proximally retreating sheath.
For some stents, the design features non-identical proximal and distal ends, so that it is critically important to load the stent in the delivery system with its distal end nearer the distal end of the delivery system. An advantage of the present invention is that it permits the building of stents with identical distal and proximal ends, that are indifferent to the choice of stent end to lie closer to the distal end of the delivery system.
The axial staggering opens up possibilities for "recesses" such as recesses 40 in Fig 3, where radiopaque marker
elements 50 can be located. These elements thus lie snug between circumferentlally spaced apart cusps 42, 44 and axially adjacent to Intervening cusps 46, to which it will be convenient to attach the marker. Any axial pushing on the stent, while the confining sleeve is withdrawn, is customarily applied to the end surface of the stent. By locating markers in the end recesses and arranging for the end elevation of the stent to comprise both cusps and markers, the stresses on the end elevation are distributed around the circumference as evenly as possible, and over the maximum area of surface of the implant, which is good for fatigue performance, quality control, and efficiency of stent release. Finally, with markers recessed into the end zone of a stent, the markers when imaged give a true impression of where the stent matrix is, and where It is not. A short look at US 2006/0025847 serves to reveal the advantages of the present proposal over another recent proposal to deal with pushing forces .
Not to be underestimated is the advantage yielded by this invention, that a "peak-to-valley" distribution of cusps in the expanded deployed disposition is automatic, regardless how short are the bridges between adjacent stenting loops. Short, strong, robust bridges that connect axially adjacent stenting loops are greatly to be welcomed, for many reasons. In particular, they are less vulnerable to Inadvertent straining {bad for fatigue performance if nothing else) when stent matrices are being installed in a catheter delivery system, or when being deployed out of one. Put another way, the stent with short stubby bridges can be rated for greater loads imposed on It during loading or deployment. Since the radial force that a stent can exert on surrounding bodily tissue increases with the number of stenting loops per unit (axial) length of the stent, a reduction in the length of the bridges connecting axially adjacent stenting loops will give rise to an increased stenting force.
However, short stubby bridges are disadvantageous, to the extent that they prejudice stent flexibility. The more flexible a stent is, the better its resistance to fatigue failure (other things being equal) . One way to deliver more flexibility, despite an absence of much flexibility in the bridges, is to increase the number of struts in the sequence of struts between each bridge and the next bridge. On that basis, the arrangement of Fig. 9, with 7 struts between any two bridges Bl, B2 or B2 , B3 , is superior to the Fig. 6 design with 5 struts, itself superior to that of Fig. 3, with 3 struts .
When it comes to radiopaque markers, it is important to arrange the markers so that they are distributed around the circumference of the stent, in the radially compact delivery disposition of the stent, as evenly as is practicable. In Fig. 3, the arrangement is even. Fig. 6 shows one possible arrangement of tantalum markers 60, 62, 64, 66 which is not far from an even distribution in the compact form of the stent (although further from evenly distributed when the stent is expanded) . In the Fig. 9 design it is clear that each end of the stent offers only three recesses for installation of a set of three markers evenly distributed around the circumference of the stent .
The markers can be of different shapes, in order to meet these design objectives, as is illustrated in Fig. 6, as one example.
One thing that is striking about the present invention is how it delivers a simple pattern of linear slits in the compact configuration that exhibits in each stenting loop a sequence of stepwise displacements, up and down the axis of the stent, in the positions of the free cusps, yet, in the expanded disposition of the stent, the axial steps are gone. Instead, the bridges are skewed, and the free cusps are circumferentialIy displaced, relative to the free cusps of
the adjacent stenting loop that were facing them, head-to- head, in the compact disposition. Of significance is that, in the expanded disposition, when the stent must exert radially outward stenting force on the bodily tissue that forms the wall of the stented bodily lumen, the zig-zag struts of each stenting rings march around the circumference of the lumen in a progression in which axial displacement of free cusps, relative to each other, is difficult to discern. Instead, the stenting loops deploys in a way that is close to an optimal planar hoop, transverse t the axis, for generating a large mechanical radially outward stenting force.
Applicant's WO2007/135090 discloses a stent that is "bend- capable" in that cusps move out of a "head-to-head" facing relationship in the expanded deployed stent, when the stent tube is bent out of a straight configuration. It will be apparent to the skilled reader that the present invention (lengthwise staggering of cusps) can be combined with the invention of WO2007/135090 (skewed unit cell) to deliver a stent matrix that avoids a head to head facing relationship of cusps, regardless of the extent to which the stent is bent out of a straight line after deployment . One way to accomplish the result explained in WO2007/135090 is to arrange the strut matrix such that ns/2 is an even number.
It hardly needs to be added, that the stents taught in this disclosure can be used in the same way as prior art stents are used. They can carry graft material, or drugs, for example. They can be delivered transluminalIy, by a suitable catheter delivery system. They can carry radiopaque markers, as is taught in the state of the art. They will find particular application in situations where the stent, after deployment, is subject to a high degree of bending.
The present drawings show specific embodiments which are to be assessed as exemplary, not limiting. The stent need not be made from shape memory metal and need not be laser cut. The
inventive concept disclosed herein is applicable to a wide range of known stent technologies.
Claims
1. A stent formed by slitting a tube to create a matrix of struts which lie more or less parallel to each other and to the longitudinal axis of the tube, the slitted tube being radially expandable to a stenting disposition in which the struts exhibit a zigzag pattern in successive loops around the circumference of the stent, the angle each strut makes with the longitudinal axis increasing as the stent diameter increases the zig-zag pattern exhibiting a cusp between any two adjacent struts with selected tied cusps of any one loop being connected by a bridge to a facing cusp of the adjacent loop, the bridge extending in a direction parallel to the longitudinal axis of the tube and with intervening free cusps, between any two bridge of a loop, not being connected to the adjacent loop characterised by lengthwise staggering of circumferentially adjacent said slits such that the length of the two circumferentially adjacent struts in the zig-zag pattern that flank a tied cusp are different and further such that, in the said stenting disposition, the free cusps of adjacent loops are circumferentially displaced from each other; and further characterised by: a plurality of radiopaque markers distributed around the circumference of the stent tube and located axially adjacent to one cusp and circumferentially in a recess flanked by the two cusps that are circumferentially adjacent said one cusp.
2. Stent as claimed in claim 1, the loops being endless.
3. Stent as claimed in claim 1, the loops being successive turns of a spiral.
4. Stent as claimed in any one of the preceding claims, with the number of bridges between two adjacent loops being at least 2 and up to 6.
5. Stent as claimed in any one of the preceding claims, with 40 struts in each loop.
6. Stent as claimed in any one of claims 1 to 4, with 24 struts in each loop.
7. Stent as claimed in claim 5 or 6 , with 4 bridges connecting each pair of adjacent loops.
8. Stent as claimed in any one of claims 1 to 4 , with 42 struts per loop.
9. Stent as claimed in claim 8, with 3 bridges connecting any two loops.
10. Stent as claimed in any one of the preceding claims, with the bridges between any two adjacent loops being evenly distributed around the circumference.
11. Stent as claimed in any one of the preceding claims, in which there are N struts between two successive bridges connecting two adjacent loops A and B, N being an integral even number, and N/2 is an integral odd number.
12. Stent as claimed in any one of claims 1 to 4, in which there are N struts between successive bridges connecting two adjacent loops A and B, N being an integral even number, and N/2 being also an integral even number.
13. Stent as claimed in any one of the preceding claims, with an end zone in which at least a majority of the cusps touch a notional circle transverse to the longitudinal axis of the stent, whereby the stress imposed on the stent by the pushing annulus is shared amongst all those cusps, said majority including the cusps that carry one of said radiopaque markers.
14. Stent as claimed in any one of the preceding claims in which the radiopaque markers in an end zone of the stent are evenly spaced around the circumference, at least when the stent is in its radially compact disposition prior to deployment .
15. Stent as claimed in claim 14, in which the markers are not all of the same shape, because of a conflict between the requirement for even spacing and the requirement that each marker fits within its respective recess.
16. A stent formed by slitting a tube to create a matrix of struts which lie more or less parallel to each other and to the longitudinal axis of the tube, the slitted tube being radially expandable to a stenting disposition in which the struts exhibit a zig-zag pattern in successive loops around the circumference of the stent, the angle each strut makes with the longitudinal axis increasing as the stent diameter increases the zig-zag pattern exhibiting a cusp between any two adjacent struts with selected tied cusps of any one loop being connected by a bridge to a facing cusp of the adjacent loop and with intervening free cusps, between any two bridges of a loop, not being connected to the adjacent loop, there being at least four such free cusps, and characterised by lengthwise staggering of circumferentially adjacent said slits wherein within one said loops, wherein any two struts that are contiguous with a said tied cusp are of different lengths and any strut that extends from one free cusp to another free cusp has the same length as any other such strut such that, in the said stenting disposition, the free cusps of adjacent loops are circumferentially displaced from each other .
17. Stent as claimed in claim 16, the loops being endless.
18. Stent as claimed in claim 16 or 17, with 40 struts in each loop.
19. Stent as claimed in claim 13, 14 or 15, with 42 struts per loop, and 3 bridges connecting any two loops.
20. Stent as claimed in any one of the preceding claims, with a plurality of radiopaque markers distributed around the circumference of the stent tube and located axially adjacent to one cusp and circumferentially in a recess flanked by the two cusps that are circumferentially adjacent said one cusp.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US12/594,531 US8518101B2 (en) | 2007-04-03 | 2008-04-03 | Bendable stent |
EP08735755A EP2134301B1 (en) | 2007-04-03 | 2008-04-03 | Bendable stent |
US13/975,147 US9050203B2 (en) | 2007-04-03 | 2013-08-23 | Bendable stent |
US14/728,981 US9668895B2 (en) | 2007-04-03 | 2015-06-02 | Bendable stent |
Applications Claiming Priority (2)
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GBGB0706499.1A GB0706499D0 (en) | 2007-04-03 | 2007-04-03 | Bendable stent |
GB0706499.1 | 2007-04-03 |
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US13/975,147 Continuation US9050203B2 (en) | 2007-04-03 | 2013-08-23 | Bendable stent |
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WO2008119837A2 true WO2008119837A2 (en) | 2008-10-09 |
WO2008119837A3 WO2008119837A3 (en) | 2009-03-12 |
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GB (1) | GB0706499D0 (en) |
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010130788A1 (en) * | 2009-05-14 | 2010-11-18 | Angiomed Gmbh & Co. Medizintechnik Kg | Stent |
US8152842B2 (en) | 2006-08-21 | 2012-04-10 | C. R. Bard, Inc. | Self-expanding stent |
US8403978B2 (en) | 2006-05-17 | 2013-03-26 | C. R. Bard, Inc. | Bend-capable tubular prosthesis |
US8475520B2 (en) | 2006-12-06 | 2013-07-02 | C. R. Bard, Inc. | Stenting ring with marker |
US8500793B2 (en) | 2006-09-07 | 2013-08-06 | C. R. Bard, Inc. | Helical implant having different ends |
USRE44463E1 (en) | 2000-08-18 | 2013-08-27 | Angiomed Gmbh & Co. Medizintechnik Kg | Implant with attached element and method of making such an implant |
US8551156B2 (en) | 2006-11-10 | 2013-10-08 | C. R. Bard, Inc. | Stent |
US8574286B2 (en) | 2006-05-18 | 2013-11-05 | C. R. Bard, Inc. | Bend-capable stent prosthesis |
US8721709B2 (en) | 2007-09-07 | 2014-05-13 | C. R. Bard, Inc. | Self-expansible stent with radiopaque markers and method of making such a stent |
US9050203B2 (en) | 2007-04-03 | 2015-06-09 | C. R. Bard, Inc. | Bendable stent |
US9254207B2 (en) | 2006-08-29 | 2016-02-09 | C.R. Bard, Inc. | Annular mesh |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0616729D0 (en) * | 2006-08-23 | 2006-10-04 | Angiomed Ag | Method of welding a component to a shape memory alloy workpiece |
GB0703379D0 (en) * | 2007-02-21 | 2007-03-28 | Angiomed Ag | Stent with radiopaque marker |
WO2010077973A2 (en) * | 2008-12-17 | 2010-07-08 | Sanjay Shrivastava | Methods and apparatus for filtering a body lumen |
KR20160103151A (en) * | 2010-08-02 | 2016-08-31 | 코디스 코포레이션 | Flexible helical stent having different helical regions |
US8840659B2 (en) * | 2011-04-28 | 2014-09-23 | Cook Medical Technologies Llc | Stent and stent-graft designs |
KR101410623B1 (en) * | 2012-03-02 | 2014-06-20 | 주식회사 시브이바이오 | Stent for improving crookedness |
US9233015B2 (en) | 2012-06-15 | 2016-01-12 | Trivascular, Inc. | Endovascular delivery system with an improved radiopaque marker scheme |
DE102013104550B4 (en) * | 2013-05-03 | 2021-07-01 | Acandis Gmbh | Medical device for insertion into a hollow organ in the body |
EP3346928A4 (en) | 2015-09-08 | 2019-04-17 | Transit Scientific, LLC | Exoskeleton devices for use with elongated medical instruments |
CA3018182A1 (en) | 2016-03-31 | 2017-10-05 | Vesper Medical, Inc. | Intravascular implants |
US10368991B2 (en) | 2017-02-06 | 2019-08-06 | C. R. Bard, Inc. | Device and associated percutaneous minimally invasive method for creating a venous valve |
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US11628076B2 (en) | 2017-09-08 | 2023-04-18 | Vesper Medical, Inc. | Hybrid stent |
US10271977B2 (en) | 2017-09-08 | 2019-04-30 | Vesper Medical, Inc. | Hybrid stent |
JP7356974B2 (en) * | 2017-10-27 | 2023-10-05 | トランジット サイエンティフィック,エルエルシー | Exoskeleton device with expandable part for scoring |
US11406801B2 (en) | 2017-10-27 | 2022-08-09 | Transit Scientific, LLC | Exoskeleton device with expandable section for scoring |
US11364134B2 (en) | 2018-02-15 | 2022-06-21 | Vesper Medical, Inc. | Tapering stent |
US10500078B2 (en) | 2018-03-09 | 2019-12-10 | Vesper Medical, Inc. | Implantable stent |
WO2021030632A1 (en) * | 2019-08-13 | 2021-02-18 | Transit Scientific, LLC | Exoskeleton device with expandable section for scoring |
US20230035464A1 (en) * | 2021-07-30 | 2023-02-02 | Stryker Corporation | Medical stents |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040073290A1 (en) | 2002-10-09 | 2004-04-15 | Scimed Life Systems, Inc. | Stent with improved flexibility |
WO2006047977A1 (en) | 2004-09-22 | 2006-05-11 | Campus Gmbh & Co. Kg | Stent to be implanted in or around a hollow organ, comprising marker elements made of an x-ray opaque material |
EP1767240A1 (en) | 2004-06-25 | 2007-03-28 | Zeon Corporation | Stent |
WO2008025762A1 (en) | 2006-08-29 | 2008-03-06 | Angiomed Gmbh & Co. Medizintechnik Kg | Annular mesh |
Family Cites Families (147)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB453944A (en) | 1935-04-10 | 1936-09-22 | John Walter Anderson | Improvements in couplings for vehicles |
FR2626046A1 (en) | 1988-01-18 | 1989-07-21 | Caoutchouc Manuf Plastique | Device for joining panels or for producing conduits and its applications |
US5091205A (en) * | 1989-01-17 | 1992-02-25 | Union Carbide Chemicals & Plastics Technology Corporation | Hydrophilic lubricious coatings |
DE9014230U1 (en) | 1990-10-13 | 1991-11-21 | Angiomed Ag, 7500 Karlsruhe, De | |
US5683448A (en) * | 1992-02-21 | 1997-11-04 | Boston Scientific Technology, Inc. | Intraluminal stent and graft |
US5383926A (en) * | 1992-11-23 | 1995-01-24 | Children's Medical Center Corporation | Re-expandable endoprosthesis |
AU673878B2 (en) * | 1993-01-19 | 1996-11-28 | Schneider (Usa) Inc. | Clad composite stent |
DE4303181A1 (en) | 1993-02-04 | 1994-08-11 | Angiomed Ag | Implantable catheter |
NL9300500A (en) * | 1993-03-22 | 1994-10-17 | Industrial Res Bv | Expandable hollow sleeve for locally supporting and / or strengthening a body vessel, as well as a method for manufacturing it. |
DE69330132T2 (en) | 1993-07-23 | 2001-11-15 | Cook Inc | FLEXIBLE STENT WITH A CONFIGURATION MOLDED FROM A MATERIAL SHEET |
US5527353A (en) * | 1993-12-02 | 1996-06-18 | Meadox Medicals, Inc. | Implantable tubular prosthesis |
US5609627A (en) | 1994-02-09 | 1997-03-11 | Boston Scientific Technology, Inc. | Method for delivering a bifurcated endoluminal prosthesis |
JP2825452B2 (en) * | 1994-04-25 | 1998-11-18 | アドヴァンスド カーディオヴァスキュラー システムズ インコーポレーテッド | Radiopak stent marker |
JPH07315147A (en) | 1994-05-23 | 1995-12-05 | Nishikawa Rubber Co Ltd | Attachment structure for drip weather strip |
US5636641A (en) * | 1994-07-25 | 1997-06-10 | Advanced Cardiovascular Systems, Inc. | High strength member for intracorporeal use |
IL115755A0 (en) | 1994-10-27 | 1996-01-19 | Medinol Ltd | X-ray visible stent |
CA2163824C (en) * | 1994-11-28 | 2000-06-20 | Richard J. Saunders | Method and apparatus for direct laser cutting of metal stents |
EP0758216B1 (en) | 1995-03-01 | 2002-07-10 | SciMed Life Systems, Inc. | Improved longitudinally flexible expandable stent |
US7204848B1 (en) * | 1995-03-01 | 2007-04-17 | Boston Scientific Scimed, Inc. | Longitudinally flexible expandable stent |
US6451047B2 (en) * | 1995-03-10 | 2002-09-17 | Impra, Inc. | Encapsulated intraluminal stent-graft and methods of making same |
US6579314B1 (en) | 1995-03-10 | 2003-06-17 | C.R. Bard, Inc. | Covered stent with encapsulated ends |
AU7458596A (en) * | 1995-10-20 | 1997-05-07 | Bandula Wijay | Vascular stent |
AU690862B2 (en) * | 1995-12-04 | 1998-04-30 | Target Therapeutics, Inc. | Fibered micro vaso-occlusive devices |
US5645532A (en) * | 1996-03-04 | 1997-07-08 | Sil-Med Corporation | Radiopaque cuff peritoneal dialysis catheter |
US6334871B1 (en) | 1996-03-13 | 2002-01-01 | Medtronic, Inc. | Radiopaque stent markers |
US5824042A (en) * | 1996-04-05 | 1998-10-20 | Medtronic, Inc. | Endoluminal prostheses having position indicating markers |
DE19614160A1 (en) * | 1996-04-10 | 1997-10-16 | Variomed Ag | Stent for transluminal implantation in hollow organs |
US5855596A (en) * | 1996-06-25 | 1999-01-05 | International Business Machines Corporation | Modular wire band stent |
US5922020A (en) * | 1996-08-02 | 1999-07-13 | Localmed, Inc. | Tubular prosthesis having improved expansion and imaging characteristics |
US6174329B1 (en) * | 1996-08-22 | 2001-01-16 | Advanced Cardiovascular Systems, Inc. | Protective coating for a stent with intermediate radiopaque coating |
US6099561A (en) * | 1996-10-21 | 2000-08-08 | Inflow Dynamics, Inc. | Vascular and endoluminal stents with improved coatings |
DE59610182D1 (en) | 1996-11-01 | 2003-04-03 | Theva Duennschichttechnik Gmbh | DEVICE FOR PRODUCING OXIDIC THIN FILMS |
WO1998020810A1 (en) * | 1996-11-12 | 1998-05-22 | Medtronic, Inc. | Flexible, radially expansible luminal prostheses |
DE29621207U1 (en) | 1996-12-06 | 1997-01-30 | Roland Man Druckmasch | Fastening a heat sink on a printed circuit board |
DE19653720A1 (en) | 1996-12-10 | 1998-06-18 | Biotronik Mess & Therapieg | Stent |
IT1291001B1 (en) * | 1997-01-09 | 1998-12-14 | Sorin Biomedica Cardio Spa | ANGIOPLASTIC STENT AND ITS PRODUCTION PROCESS |
US5858556A (en) * | 1997-01-21 | 1999-01-12 | Uti Corporation | Multilayer composite tubular structure and method of making |
US5810872A (en) | 1997-03-14 | 1998-09-22 | Kanesaka; Nozomu | Flexible stent |
US5902475A (en) * | 1997-04-08 | 1999-05-11 | Interventional Technologies, Inc. | Method for manufacturing a stent |
US5868783A (en) * | 1997-04-16 | 1999-02-09 | Numed, Inc. | Intravascular stent with limited axial shrinkage |
US5741327A (en) * | 1997-05-06 | 1998-04-21 | Global Therapeutics, Inc. | Surgical stent featuring radiopaque markers |
DE19728337A1 (en) | 1997-07-03 | 1999-01-07 | Inst Mikrotechnik Mainz Gmbh | Implantable stent |
US5824059A (en) * | 1997-08-05 | 1998-10-20 | Wijay; Bandula | Flexible stent |
US6231598B1 (en) | 1997-09-24 | 2001-05-15 | Med Institute, Inc. | Radially expandable stent |
US6086611A (en) * | 1997-09-25 | 2000-07-11 | Ave Connaught | Bifurcated stent |
US6022374A (en) * | 1997-12-16 | 2000-02-08 | Cardiovasc, Inc. | Expandable stent having radiopaque marker and method |
US6503271B2 (en) | 1998-01-09 | 2003-01-07 | Cordis Corporation | Intravascular device with improved radiopacity |
US6113627A (en) | 1998-02-03 | 2000-09-05 | Jang; G. David | Tubular stent consists of horizontal expansion struts and contralaterally attached diagonal-connectors |
US6241762B1 (en) * | 1998-03-30 | 2001-06-05 | Conor Medsystems, Inc. | Expandable medical device with ductile hinges |
FR2777771B1 (en) | 1998-04-27 | 2000-08-25 | Microval | TUBULAR AND FLEXIBLE VASCULAR ENDOPROSTHESIS |
US6261319B1 (en) * | 1998-07-08 | 2001-07-17 | Scimed Life Systems, Inc. | Stent |
US6355057B1 (en) | 1999-01-14 | 2002-03-12 | Medtronic, Inc. | Staggered endoluminal stent |
EP1154735A1 (en) | 1999-02-26 | 2001-11-21 | Advanced Cardiovascular Systems, Inc. | Stent with customized flexibility |
US7029492B1 (en) | 1999-03-05 | 2006-04-18 | Terumo Kabushiki Kaisha | Implanting stent and dilating device |
DE29904817U1 (en) | 1999-03-16 | 1999-05-27 | Amg Handelsgesellschaft Fuer A | Blood vessel support device |
US6464723B1 (en) | 1999-04-22 | 2002-10-15 | Advanced Cardiovascular Systems, Inc. | Radiopaque stents |
US6551351B2 (en) | 1999-07-02 | 2003-04-22 | Scimed Life Systems | Spiral wound stent |
US6379381B1 (en) * | 1999-09-03 | 2002-04-30 | Advanced Cardiovascular Systems, Inc. | Porous prosthesis and a method of depositing substances into the pores |
US6585757B1 (en) * | 1999-09-15 | 2003-07-01 | Advanced Cardiovascular Systems, Inc. | Endovascular stent with radiopaque spine |
US6387123B1 (en) * | 1999-10-13 | 2002-05-14 | Advanced Cardiovascular Systems, Inc. | Stent with radiopaque core |
DE19952295A1 (en) | 1999-10-29 | 2001-05-23 | Angiomed Ag | Method of making a stent |
US6471721B1 (en) * | 1999-12-30 | 2002-10-29 | Advanced Cardiovascular Systems, Inc. | Vascular stent having increased radiopacity and method for making same |
GB0003387D0 (en) | 2000-02-14 | 2000-04-05 | Angiomed Ag | Stent matrix |
GB0009030D0 (en) | 2000-04-12 | 2000-05-31 | Angiomed Ag | Self-expanding metal stent and method of making it |
US20030114918A1 (en) | 2000-04-28 | 2003-06-19 | Garrison Michi E. | Stent graft assembly and method |
EP1284683B1 (en) * | 2000-05-22 | 2011-08-10 | OrbusNeich Medical, Inc. | Self-expanding stent |
DE10026307A1 (en) | 2000-05-26 | 2001-11-29 | Variomed Ag Balzers | Stent, positioning element and insertion catheter |
GB0020491D0 (en) | 2000-08-18 | 2000-10-11 | Angiomed Ag | Stent with attached element and method of making such a stent |
US20020072792A1 (en) | 2000-09-22 | 2002-06-13 | Robert Burgermeister | Stent with optimal strength and radiopacity characteristics |
US20070276474A1 (en) * | 2000-09-29 | 2007-11-29 | Llanos Gerard H | Medical Devices, Drug Coatings and Methods for Maintaining the Drug Coatings Thereon |
US6547818B1 (en) * | 2000-10-20 | 2003-04-15 | Endotex Interventional Systems, Inc. | Selectively thinned coiled-sheet stents and methods for making them |
US6758859B1 (en) * | 2000-10-30 | 2004-07-06 | Kenny L. Dang | Increased drug-loading and reduced stress drug delivery device |
EP1343436A4 (en) | 2000-12-19 | 2008-05-28 | Vascular Architects Inc | Biologically active agent delivery apparatus and method |
US6565599B1 (en) * | 2000-12-28 | 2003-05-20 | Advanced Cardiovascular Systems, Inc. | Hybrid stent |
US6540777B2 (en) * | 2001-02-15 | 2003-04-01 | Scimed Life Systems, Inc. | Locking stent |
US20020138136A1 (en) * | 2001-03-23 | 2002-09-26 | Scimed Life Systems, Inc. | Medical device having radio-opacification and barrier layers |
EP1245203B1 (en) | 2001-03-30 | 2006-03-08 | Terumo Kabushiki Kaisha | Stent |
US6629994B2 (en) * | 2001-06-11 | 2003-10-07 | Advanced Cardiovascular Systems, Inc. | Intravascular stent |
US8197535B2 (en) | 2001-06-19 | 2012-06-12 | Cordis Corporation | Low profile improved radiopacity intraluminal medical device |
US20020198589A1 (en) * | 2001-06-22 | 2002-12-26 | Leong Veronica Jade | Tessellated stent and method of manufacture |
US6605110B2 (en) * | 2001-06-29 | 2003-08-12 | Advanced Cardiovascular Systems, Inc. | Stent with enhanced bendability and flexibility |
US6979346B1 (en) * | 2001-08-08 | 2005-12-27 | Advanced Cardiovascular Systems, Inc. | System and method for improved stent retention |
US20030055485A1 (en) * | 2001-09-17 | 2003-03-20 | Intra Therapeutics, Inc. | Stent with offset cell geometry |
AU2002339717A1 (en) | 2001-10-18 | 2003-07-15 | Advanced Stent Technologies, Inc. | Stent for vessel support, coverage and side branch accessibility |
US20050182477A1 (en) * | 2001-12-20 | 2005-08-18 | White Geoffrey H. | Intraluminal stent and graft |
DE10201151B4 (en) | 2002-01-15 | 2007-10-04 | Qualimed Innovative Medizinprodukte Gmbh | Stent with marker |
GB0206061D0 (en) | 2002-03-14 | 2002-04-24 | Angiomed Ag | Metal structure compatible with MRI imaging, and method of manufacturing such a structure |
US7691461B1 (en) | 2002-04-01 | 2010-04-06 | Advanced Cardiovascular Systems, Inc. | Hybrid stent and method of making |
US7195648B2 (en) * | 2002-05-16 | 2007-03-27 | Cordis Neurovascular, Inc. | Intravascular stent device |
US20030225448A1 (en) | 2002-05-28 | 2003-12-04 | Scimed Life Systems, Inc. | Polar radiopaque marker for stent |
US20040015229A1 (en) * | 2002-07-22 | 2004-01-22 | Syntheon, Llc | Vascular stent with radiopaque markers |
US6969402B2 (en) * | 2002-07-26 | 2005-11-29 | Syntheon, Llc | Helical stent having flexible transition zone |
US6878162B2 (en) * | 2002-08-30 | 2005-04-12 | Edwards Lifesciences Ag | Helical stent having improved flexibility and expandability |
AU2003254132A1 (en) | 2002-08-30 | 2004-03-19 | Advanced Cardiovascular Systems, Inc. | Stent with nested rings |
US7135038B1 (en) * | 2002-09-30 | 2006-11-14 | Advanced Cardiovascular Systems, Inc. | Drug eluting stent |
US7331986B2 (en) * | 2002-10-09 | 2008-02-19 | Boston Scientific Scimed, Inc. | Intraluminal medical device having improved visibility |
US8105373B2 (en) * | 2002-12-16 | 2012-01-31 | Boston Scientific Scimed, Inc. | Flexible stent with improved axial strength |
CN100563789C (en) | 2002-12-17 | 2009-12-02 | 弗劳尔公司 | Configuration and method near the removal sour gas and the impurity of zero-emission |
US20050033410A1 (en) * | 2002-12-24 | 2005-02-10 | Novostent Corporation | Vascular prothesis having flexible configuration |
US7771463B2 (en) | 2003-03-26 | 2010-08-10 | Ton Dai T | Twist-down implant delivery technologies |
US6846323B2 (en) * | 2003-05-15 | 2005-01-25 | Advanced Cardiovascular Systems, Inc. | Intravascular stent |
US20040236409A1 (en) * | 2003-05-20 | 2004-11-25 | Pelton Alan R. | Radiopacity intraluminal medical device |
EP2286771B1 (en) * | 2003-05-23 | 2016-05-11 | Boston Scientific Limited | Stents with attached looped ends |
DE10325678A1 (en) * | 2003-06-02 | 2004-12-23 | Biotronik Meß- und Therapiegeräte GmbH & Co. Ingenieurbüro Berlin | Connection system for connecting a stent to a radio-opaque marker and method for establishing a connection between a stent and two or more radio-opaque markers |
US20040254637A1 (en) * | 2003-06-16 | 2004-12-16 | Endotex Interventional Systems, Inc. | Sleeve stent marker |
US7479157B2 (en) * | 2003-08-07 | 2009-01-20 | Boston Scientific Scimed, Inc. | Stent designs which enable the visibility of the inside of the stent during MRI |
US20050060025A1 (en) | 2003-09-12 | 2005-03-17 | Mackiewicz David A. | Radiopaque markers for medical devices |
US7175654B2 (en) * | 2003-10-16 | 2007-02-13 | Cordis Corporation | Stent design having stent segments which uncouple upon deployment |
US20050149168A1 (en) * | 2003-12-30 | 2005-07-07 | Daniel Gregorich | Stent to be deployed on a bend |
US7021893B2 (en) | 2004-01-09 | 2006-04-04 | United Technologies Corporation | Fanned trailing edge teardrop array |
GB0400571D0 (en) | 2004-01-12 | 2004-02-11 | Angiomed Gmbh & Co | Implant |
US7572289B2 (en) | 2004-01-27 | 2009-08-11 | Med Institute, Inc. | Anchoring barb for attachment to a medical prosthesis |
US7243408B2 (en) * | 2004-02-09 | 2007-07-17 | Boston Scientific Scimed, Inc. | Process method for attaching radio opaque markers to shape memory stent |
TW200528463A (en) * | 2004-02-19 | 2005-09-01 | Chung Shan Inst Of Science | A method for preparing an bifunctional arylphosphonite antioxidant |
US8034096B2 (en) * | 2004-03-31 | 2011-10-11 | Cook Medical Technologies Llc | Stent-graft with graft to graft attachment |
DE602004022461D1 (en) * | 2004-05-05 | 2009-09-17 | Invatec Srl | Endoluminalprothese |
US20050278017A1 (en) * | 2004-06-09 | 2005-12-15 | Scimed Life Systems, Inc. | Overlapped stents for scaffolding, flexibility and MRI compatibility |
US7763066B2 (en) | 2004-07-28 | 2010-07-27 | Cook Incorporated | Stent with an end member having a lateral extension |
GB0417077D0 (en) | 2004-07-30 | 2004-09-01 | Angiomed Ag | Medical implant such as a stent |
GB0417078D0 (en) | 2004-07-30 | 2004-09-01 | Angiomed Ag | Flexible implant |
US20060064155A1 (en) | 2004-09-01 | 2006-03-23 | Pst, Llc | Stent and method for manufacturing the stent |
DE102004043166A1 (en) * | 2004-09-03 | 2006-03-09 | Carl Baasel Lasertechnik Gmbh & Co. Kg | Intravascular stent and method for its production |
DE202004014789U1 (en) | 2004-09-22 | 2005-01-27 | Campus Medizin & Technik Gmbh | Stent for implantation into or onto a hollow organ comprises a cutout serving as receptacle for a conical marker element which is X-ray opaque and is oriented radially relative to the stent axis |
WO2006036912A2 (en) | 2004-09-27 | 2006-04-06 | Echobio Llc | Systems, apparatus and methods related to helical, non-helical or removable stents with rectilinear ends |
US20060085065A1 (en) * | 2004-10-15 | 2006-04-20 | Krause Arthur A | Stent with auxiliary treatment structure |
FR2879131B1 (en) | 2004-12-14 | 2010-12-17 | Saint Gobain | COMPLEX GLAZING CONSISTS OF AT LEAST TWO CONTIGUOUS GLASS ELEMENTS AND METHOD FOR PRODUCING THE COMPLEX GLAZING. |
US20060216431A1 (en) * | 2005-03-28 | 2006-09-28 | Kerrigan Cameron K | Electrostatic abluminal coating of a stent crimped on a balloon catheter |
US7854760B2 (en) | 2005-05-16 | 2010-12-21 | Boston Scientific Scimed, Inc. | Medical devices including metallic films |
US20060265049A1 (en) * | 2005-05-19 | 2006-11-23 | Gray Robert W | Stent and MR imaging process and device |
US20070250148A1 (en) * | 2005-09-26 | 2007-10-25 | Perry Kenneth E Jr | Systems, apparatus and methods related to helical, non-helical or removable stents with rectilinear ends |
US20070112421A1 (en) * | 2005-11-14 | 2007-05-17 | O'brien Barry | Medical device with a grooved surface |
US7381217B2 (en) | 2005-12-23 | 2008-06-03 | Boston Scientific Scimed, Inc. | Serpentine stent pattern |
GB0609841D0 (en) | 2006-05-17 | 2006-06-28 | Angiomed Ag | Bend-capable tubular prosthesis |
GB0609911D0 (en) | 2006-05-18 | 2006-06-28 | Angiomed Ag | Bend-capable stent prosthesis |
GB0613670D0 (en) | 2006-07-10 | 2006-08-16 | Angiomed Ag | Tubular metal prosthesis and method of making it |
GB0616579D0 (en) | 2006-08-21 | 2006-09-27 | Angiomed Ag | Self-expanding stent |
GB0616729D0 (en) | 2006-08-23 | 2006-10-04 | Angiomed Ag | Method of welding a component to a shape memory alloy workpiece |
WO2008028964A2 (en) | 2006-09-07 | 2008-03-13 | Angiomed Gmbh & Co. Medizintechnik Kg | Helical implant having different ends |
FR2907587B1 (en) | 2006-10-23 | 2008-12-26 | Commissariat Energie Atomique | MAGNETIC DEVICE WITH PERPENDICULAR ANIMATION AND INTERCOUNTING COMPENSATORY INTERCONNECTIVE LAYER. |
GB0622465D0 (en) | 2006-11-10 | 2006-12-20 | Angiomed Ag | Stent |
GB0624419D0 (en) | 2006-12-06 | 2007-01-17 | Angiomed Ag | Stenting ring with marker |
GB0703379D0 (en) | 2007-02-21 | 2007-03-28 | Angiomed Ag | Stent with radiopaque marker |
GB0706499D0 (en) | 2007-04-03 | 2007-05-09 | Angiomed Ag | Bendable stent |
GB0717481D0 (en) | 2007-09-07 | 2007-10-17 | Angiomed Ag | Self-expansible stent with radiopaque markers |
US20090204203A1 (en) | 2008-02-07 | 2009-08-13 | Medtronic Vascular, Inc. | Bioabsorbable Stent Having a Radiopaque Marker |
EP2555811B1 (en) | 2010-04-06 | 2017-09-27 | Boston Scientific Scimed, Inc. | Endoprosthesis |
CA2802753C (en) | 2010-06-21 | 2018-07-31 | Zorion Medical, Inc. | Bioabsorbable implants |
-
2007
- 2007-04-03 GB GBGB0706499.1A patent/GB0706499D0/en not_active Ceased
-
2008
- 2008-04-03 EP EP12174308.2A patent/EP2508151B1/en active Active
- 2008-04-03 US US12/594,531 patent/US8518101B2/en active Active
- 2008-04-03 WO PCT/EP2008/054007 patent/WO2008119837A2/en active Application Filing
- 2008-04-03 EP EP08735755A patent/EP2134301B1/en active Active
-
2013
- 2013-08-23 US US13/975,147 patent/US9050203B2/en active Active
-
2015
- 2015-06-02 US US14/728,981 patent/US9668895B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040073290A1 (en) | 2002-10-09 | 2004-04-15 | Scimed Life Systems, Inc. | Stent with improved flexibility |
EP1767240A1 (en) | 2004-06-25 | 2007-03-28 | Zeon Corporation | Stent |
WO2006047977A1 (en) | 2004-09-22 | 2006-05-11 | Campus Gmbh & Co. Kg | Stent to be implanted in or around a hollow organ, comprising marker elements made of an x-ray opaque material |
WO2008025762A1 (en) | 2006-08-29 | 2008-03-06 | Angiomed Gmbh & Co. Medizintechnik Kg | Annular mesh |
Cited By (22)
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US8900290B2 (en) | 2000-08-17 | 2014-12-02 | Angiomed Gmbh & Co. Medizintechnik Kg | Implant with attached element and method of making such an implant |
US10213327B2 (en) | 2000-08-17 | 2019-02-26 | Angiomed Gmbh & Co. Medizintechnik Kg | Implant with attached element and method of making such an implant |
US9480587B2 (en) | 2000-08-17 | 2016-11-01 | Angiomed Gmbh & Co. Medizintechnik Kg | Implant with attached element and method of making such an implant |
USRE44463E1 (en) | 2000-08-18 | 2013-08-27 | Angiomed Gmbh & Co. Medizintechnik Kg | Implant with attached element and method of making such an implant |
US9155642B2 (en) | 2006-05-17 | 2015-10-13 | C.R. Bard, Inc. | Bend-capable tubular prosthesis |
US10849770B2 (en) | 2006-05-17 | 2020-12-01 | C. R. Bard, Inc. | Bend-capable tubular prosthesis |
US8403978B2 (en) | 2006-05-17 | 2013-03-26 | C. R. Bard, Inc. | Bend-capable tubular prosthesis |
US10231854B2 (en) | 2006-05-18 | 2019-03-19 | C. R. Bard, Inc. | Bend-capable stent prosthesis |
US8574286B2 (en) | 2006-05-18 | 2013-11-05 | C. R. Bard, Inc. | Bend-capable stent prosthesis |
US9364353B2 (en) | 2006-05-18 | 2016-06-14 | C.R. Bard, Inc. | Bend-capable stent prosthesis |
US8152842B2 (en) | 2006-08-21 | 2012-04-10 | C. R. Bard, Inc. | Self-expanding stent |
US9254207B2 (en) | 2006-08-29 | 2016-02-09 | C.R. Bard, Inc. | Annular mesh |
US8500793B2 (en) | 2006-09-07 | 2013-08-06 | C. R. Bard, Inc. | Helical implant having different ends |
US9084691B2 (en) | 2006-11-10 | 2015-07-21 | C. R. Bard, Inc. | Stent |
US8551156B2 (en) | 2006-11-10 | 2013-10-08 | C. R. Bard, Inc. | Stent |
US10500075B2 (en) | 2006-11-10 | 2019-12-10 | C. R. Bard, Inc. | Stent |
US8475520B2 (en) | 2006-12-06 | 2013-07-02 | C. R. Bard, Inc. | Stenting ring with marker |
US9050203B2 (en) | 2007-04-03 | 2015-06-09 | C. R. Bard, Inc. | Bendable stent |
US10016291B2 (en) | 2007-09-07 | 2018-07-10 | C. R. Bard, Inc. | Self-expansible stent with radiopaque markers and method of making such a stent |
US8721709B2 (en) | 2007-09-07 | 2014-05-13 | C. R. Bard, Inc. | Self-expansible stent with radiopaque markers and method of making such a stent |
US8852262B2 (en) | 2009-05-14 | 2014-10-07 | C. R. Bard, Inc. | Stent |
WO2010130788A1 (en) * | 2009-05-14 | 2010-11-18 | Angiomed Gmbh & Co. Medizintechnik Kg | Stent |
Also Published As
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US9050203B2 (en) | 2015-06-09 |
US9668895B2 (en) | 2017-06-06 |
EP2508151A1 (en) | 2012-10-10 |
US8518101B2 (en) | 2013-08-27 |
EP2134301A2 (en) | 2009-12-23 |
EP2508151B1 (en) | 2013-12-18 |
WO2008119837A3 (en) | 2009-03-12 |
EP2134301B1 (en) | 2012-08-08 |
US20130345791A1 (en) | 2013-12-26 |
US20150257909A1 (en) | 2015-09-17 |
US20100211161A1 (en) | 2010-08-19 |
GB0706499D0 (en) | 2007-05-09 |
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