|Publication number||US6293968 B1|
|Application number||US 09/422,747|
|Publication date||Sep 25, 2001|
|Filing date||Oct 21, 1999|
|Priority date||Sep 2, 1999|
|Publication number||09422747, 422747, US 6293968 B1, US 6293968B1, US-B1-6293968, US6293968 B1, US6293968B1|
|Inventors||Syde A. Taheri|
|Original Assignee||Syde A. Taheri|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (35), Referenced by (108), Classifications (8), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present application claims priority based on provisional application Ser. No. 60/152,094, filed Sep. 2, 1999.
1. Field of the Invention
The present invention generally relates to the treatment of arterial disease including, for example, an abdominal aortic aneurism or occlusive disease of an artery. More particularly, the present invention relates to an improved method for treating arterial disease using a novel intraluminal vascular stent formed of a meshwork of inflatable conduits. This construction provides for readily deploying the stent and for repositioning it should the stent not be initially deployed in the most optimum position in the vasculature.
2. Prior Art
The prior art describes the treatment of arterial disease by various surgical techniques, some involving the use of stents and grafts. For example, it is well known to interpose a stent within a diseased portion of the human vasculature to prop open and support the vasculature and provide unhindered fluid flow there through. Conventional stents are made of stainless steel wire, Nitinol wire and the like constructed in a meshwork form. Such stents are balloon or self-expandable inside an arterial lumen to provide for supporting and strengthening the walls of a stenotic or occluded artery. Similarly, it is well known in the prior art to use a graft in conjunction with a stent to repair damaged portions of the aorta or other arteries. Grafts, comprised of hollow tubes of prosthetic material such as Dacron, are normally inserted within the walls of a damaged artery and can be deployed into position through the use of a stented balloon catheter, thereby ensuring blood flow and reducing the risk of an aneurysm rupturing.
One of the problems with current stent designs is that it is difficult to control the supporting force which they exert against the vasculature side wall. Although the inflation pressure of the balloon catheter can be controlled, once the balloon is deflated and removed leaving the deployed stent in place, the force of the stent supporting the vasculature wall can change over time. Eventually, it is possible that a conventional wire mesh stent could become fatigued and bend and fracture to the extent that the supporting force it exerts is less than desirable to maintain open and unhindered flow through the vasculature. Conventional practice is to re-enter the treatment zone with a balloon catheter which is moved inside the relaxed stent and inflated to re-position the stent against the vasculature side wall. If the stent has relaxed to the point that it no longer sufficiently supports the vasculature wall, it must be removed and replaced.
U.S. Pat. Nos. 4,183,102 to Guiset and 5,370,691 to Samson describe inflatable devices for supporting the vasculature. However these devices do not provide a meshwork of intersecting conduits as in the present invention. Guiset disclosed a plurality of hollow toroidal sleeves while Samson relates to a helically wound polymeric tubing. These devices do not provide for lateral flow at the junction of two arteries, for example.
The present invention solves the drawbacks of the prior art by providing a novel inflatable intraluminal vascular stent or stented graft and method for treating vasculature diseases. The inflatable characteristic of the present stent means that the supporting force exerted by the stent will not change. Also, the present inflatable stent is selectively deflatable for repositioning should it later be determined that the stent is not positioned in the most desirable location within the vasculature.
The present inflatable intraluminal vascular stent incorporates fine conduits of synthetic material in a meshwork like structure forming a tubular vascular prosthesis. The conduits provide for inflating and deflating the meshwork structure to deploy the stent, adjust its force and for repositioning or removing the stent, if needed. Accordingly, the present invention includes a method for repairing a treatment zone in a vasculature and the like by positioning the inflatable intraluminal vascular stent bridging the treatment zone. Following insertion of the stent into the vasculature spanning the treatment zone, the meshwork structure is inflated to expand the stent against the vasculature wall. Importantly, the inflation pressure is controllable to regulate the supporting force of the stent as it conforms to the shape of the vasculature.
These and other aspects and advantages of the present invention will become increasingly more apparent to those skilled in the art by reference to the following description and the accompanying drawings.
FIG. 1A is a perspective view of one embodiment of an inflatable intraluminal vascular stent 10 according to the present invention in a deflated condition.
FIG. 1B is a perspective view of the stent 10 shown in FIG. 1A in an inflated condition.
FIG. 2A is a perspective view of a second embodiment of an inflatable intraluminal vascular stent 50 according to the present invention in a deflated condition.
FIG. 2B is a perspective view of the stent 50 shown in FIG. 2A in an inflated condition.
FIG. 3 is a partial cross-sectional view of the fill port 28 for the stent 10, 50 and the mating fitting 84 for the inflation conduit 72.
FIG. 4 is a perspective view of a release plunger 116 for opening the fill port 28 and a pump 122 for inflating the stent.
FIG. 5 is a perspective view of the stent of FIGS. 2A and 2B secured to a graft 132 according to the present invention.
Turning now to the drawings, FIGS. 1A and 1B illustrate one exemplary embodiment of an inflatable intraluminal vascular stent 10 comprising a tubular shaped prosthesis 12 for a body passageway and FIGS. 2A and 2B show another embodiment of an inflatable intraluminal vascular stent 50 comprising a tubular shaped prosthesis 52, both according to the present invention. It should be understood that the terms “inflatable intraluminal vascular stent” and “inflatable prosthesis” are interchangeably used to some extent in describing the present invention, insofar as the methods, apparatus, and structures of the present invention may be utilized not only in connection with an inflatable intraluminal vascular stent for expanding partially occluded segments of a blood vessel or a body passageway, but may also be utilized as an inflatable prosthesis for many other types of body passageways. For example, the inflatable prostheses 12, 52 may also be used for such purposes as: (1) supportive stent placement within blocked arteries opened by transluminal recanalization, but which are likely to collapse in the absence of an internal support; (2) similar use following catheter passage through mediastinal and other veins occluded by inoperable cancers; (3) reinforcement of catheter created intrahepatic communications between portal and hepatic veins in patients suffering from portal hypertension; (4) supportive stent placement of narrowing of the esophagus, the intestine, the ureters, the urethra; and (5) supportive stent reinforcement of reopened and previously obstructed bile ducts. Accordingly, the term “intraluminal vascular stent” encompasses use for expanding the lumen of a body passageway and the term “body passageway” encompasses any duct within the human body, such as those previously described, as well as any vein, artery, or blood vessel within the human vasculature.
FIGS. 1A and 1B show one embodiment of a stent 10 according to the present invention as a tubular shaped prosthesis 12 including first and second ends 14 and 16 and an outer wall surface 18 disposed between the ends. Preferably, the wall surface 18 is formed by a plurality of intersecting elongate members 20 and 22 of a conduit-shaped synthetic material. In that respect and with reference to the orientation of FIGS. 1A and 1B, the prosthesis 12 comprises the plurality of parallel elongate members 20 disposed in an orientation running generally south-west to north-east from the first end 14 to the second end 16 of the stent 10, and the plurality of parallel elongate members 22 disposed in an orientation running generally south-east to north-west from the first end 14 to the second end 16 of the stent 10.
In the deflated condition, the conduit-shaped elongate members 20 and 22 intersect with one another at acute angles designated 24 in FIG. 1A, intermediate the first and second ends 14 and 16. This intersecting construction is shown, for example, at junctions 26. In an alternate embodiment of the present invention, the plurality of elongate members 20 and 22 do not necessarily have fluid flow communication with one another at each of their intersections 26. Instead, the outer surface of each of them are fixedly secured to one another at their intersections by ultrasonic welding, gluing and the like. What is important is that each of the plurality of elongate members 20 and 22 have fluid flow communication from a fill port 28, which is shown in FIG. 3 and will be described in greater detail hereinafter.
FIGS. 1A and 1B also show an optical radiopaque marker 30 secured to the stent 10. The radiopaque marker 30 is optional, but is necessary to determine the position of the stent in the vasculature during deployment. The marker 30 may be any suitable radiopqaue material, preferably metal. Materials such as the platinum series of metals (platinum, palladium, etc.) and gold, silver, and tantalum may be used as the marker 30. Certain stainless steels are also suitable for use as the marker. It should also be understood that the marker 30 can have various shapes and sizes and should not be limited to that shown.
Also shown in FIG. 1A, the tubular shaped prosthesis 12 has a first diameter, d, which permits intraluminal delivery of the prosthesis 12 into a body passage (not shown). With reference to FIG. 1B, upon the application of an inflating force to the conduit construction of the intersecting elongate members 20 and 22, the tubular shaped prosthesis 12 inflates to a second diameter, D. The second diameter D is variable in size and dependent upon the force of the medium inflated into the intersecting elongate members 20 and 22 of the tubular shaped prosthesis 12
The elongate members 20 and 22 forming the outer wall surface 18 of the tubular shaped prosthesis 12 may be of any suitable synthetic polymeric material which is inflatable and compatible with the human body and with bodily fluids with which the vascular graft or prosthesis 12 may come into contact. In that respect, the elongate members 20 and 22 must be made of a synthetic material which has the requisite strength and elasticity characteristics to permit the tubular shaped prosthesis 12 to be inflated from the configuration shown in FIG. 1A to the configuration illustrated in FIG. 1B and further to permit the tubular shaped prostheses 12 to retain its inflated configuration providing the enlarged diameter D. Exemplary synthetic polymeric materials for the stent 10 include high-density polyethylene, low-density polyethylene, and polypropylene, as well as interpolymers and block copolymers of these polyolefins. Other polymers such as polyacrylonitrile, polyethylene terephthalate, polybutylene terephthalate, silicones, natural and synthetic rubbers and polytetrafluoroethylene are also suitable materials. Further, it is within the scope of the present invention to provide an inflatable stent as a hybrid of these materials. For example, it may be desirable to provide the stent made of two of the materials so that different portions of the stent inflate at different rates.
Preferably, the elongate members 20 and 22 are fabricated from PTFE having a cylindrical cross-section. The elongate members 20 and 22 can, of course, have other cross-sectional configurations, such as triangular, square, rectangular, hexagonal, etc.
Finally, the prosthesis 12 is provided with loops 32 and 34 at the respective first and second ends 14 and 16. The loops 32 and 34 provide for positioning the prosthesis 12 at a treatment zone in the vasculature using the apparatus and method set forth in U.S. Pat. No. 5,948,017 to Taheri. This patent is incorporated herein by reference.
FIGS. 2A and 2B show another preferred embodiment of an inflatable intraluminal vascular stent 50 comprising a tubular shaped prosthesis 52 having first and second ends 54 and 56 and an outer wall surface 58 disposed between the ends. The outer wall surface 58 is formed of a plurality of longitudinal members 60 intersecting with lateral numbers 62, both of a conduit-shaped synthetic material. In the deflated condition, the conduit-shaped elongate members 60 and 62 intersect with one another at right angle junctions, designated 64 in FIG. 2A. The connecting members 60 and 62 are of a conduit-shaped material in fluid flow communication with each other and with a fill port 28. The fill port 28, which is similar to that shown in FIGS. 1A and 1B, is described in detail hereinafter with respect to FIG. 3 and provides for inflating the connecting members 60 and 62 of the stent 50 having a deflated diameter d to provide the expanded stent configuration shown in FIG. 2B having the inflated diameter D.
As with the prosthesis 10 shown in FIGS. 1A and 1B, prosthesis 50 is provided with a radiopaque marker 67 and with loops 68 and 70 at its respective ends 54 and 56 for positioning the prosthesis in the vasculature according to U.S. Pat. No. 5,948,017 to Taheri.
It should be pointed out that the prosthesis configurations illustrated in FIGS. 1A, 1B, 2A and 2B are only illustrative. In that respect, FIGS. 1A and 1B are provided to illustrate that the present invention covers stents having conduit-shaped members meeting each other at an acute angle in the deflated condition and FIGS. 2A and 2B are provided to illustrate that the present invention also covers stents having conduit-shaped members meeting each other at right angles in the deflated condition. Accordingly, stents 10 and 50 are illustrative and inflatable prosthesis according to the present invention can have a myriad of configurations that are only limited by the imagination of those skilled in the art. For example, U.S. Pat. Nos. B1 4,733,665, 4,994,071, 5,104,404, 5,382,261, 5,449,373, 5,514,154, 5,549,663, 5,569,295, 5,591,197, 5,603,721, 5,697,971, 5,728,131, 5,733,303, 5,735,893, 5,776,161, 5,776,183, 5,800,515, 5,810,872, 5,827,321 and 5,836,964 are illustrative of various alternative shapes of prosthesis devices which can be made of conduit-material, instead of the wire material described in the respective patents, to provide an inflatable prosthesis according to the present invention.
FIGS. 1A, 1B, 2A and 2B show the respective stents 10 and 50 having an inflation conduit 72 connectable to the fill port 28 for inflating the stents. As shown in greater detail in FIG. 3, the inflation conduit 72 is a cylindrically shaped member having a threaded fitting 74 at its distal end. The inflation conduit 72 is made of a synthetic material that is flexible enough to travel through the vasculature to the stents 10, 50 positioned at a treatment zone in the vasculature. In the alternative, the inflation conduit is connected to the stent as the stent is being deployed to the treatment zone.
The threaded fitting 74 is a female shaped member connected to a reduced diameter portion 76 of the distal end of the inflation conduit 72 by a hose clamp 78 and the like. The fitting 74 is provided with double threads 80 that threadingly mate with the double threads 82 of a male fitting 84 secured to a reduced diameter portion 86 of the stent 10, 50 by a hose clamp 88. The male fitting 84 has an internal bore 90 comprising a cylindrical shaped portion 92 leading to a dome-shaped restriction 94. The dome-shaped restriction 94 communicates with a frusto-conical portion 96 forming a seat 98. The frusto-conical portion 96 tapers outwardly from the seat 98 to the threaded end of the fitting 84. The female fitting 74 is provided with an internal frusto-conical bore 100 that tapers outwardly from the threads 80 towards the inflation conduit 72. When the female fitting 74 is threadingly mated to the male fitting 84 the respective frusto-conical portions 96 and 100 align with each other. The male fitting 84 is also provided with an annular groove 102 intermediate the length of the cylindrical shaped portion 92 of the bore 90. The annular groove 102 is of a greater diameter than the cylindrical portion 92 and supports a snap-ring 104 that confines a coil spring 106 biasing a ball check valve 108 against the seat 98. Preferably the ball 108 is of deformable synthetic material to seal against the seat 98 to thereby seal the inflatable stent 10, 50.
To inflate the stent 10, 50, the female fitting 74 at the end of the inflation conduit 72 is threadingly mated to the male fitting 84. Those skilled in the art will readily understand that the inflation conduit 72 could be provided with male threads and the stent fitting 84 with female threads without departing from the spirit and scope of the present invention. The inflation conduit 72 supports an internal release wire 110 having its distal end 112 residing in the frusto-conical sections 96 and 100 and its proximal end 114 disposed in a release plunger 116 (FIG. 4).
The release plunger 116 has a piston 118 connected to the release wire 110 for moving the wire towards and away from the ball check valve 108. When the release wire 110 contacts the ball check valve 108, it overcomes the biasing force of spring 106 to open communication between the inflation tube 72 and the stent 10, 50. With the check valve 108 opened, an inflation plunger 120 of an inflation pump 122 is actuated to fill an inflation medium into the stent 10, 50. This is done by first opening a shut-off valve 124 and moving the plunger 120 toward the opened check valve 108 to move the inflation medium into the stent 10, 50. The inflation medium can comprise a gaseous material such as carbon dioxide, air, a flowable gelatinous material, a metal powder, water or similar fluid and the like. In that manner, the prosthesis is radially and laterally expanded from its collapsed or deflated diameter d to its inflated diameter D. The second diameter D is variable and controlled by the amount of inflation medium flowed into the prosthesis.
When the stent 10, 50 is properly inflated, the piston 118 of the release plunger 116 is moved away from the stent 10, 50 to move the release wire 110 back into the female fitting 74. This enables the ball check valve 108 to seal against the seat 98 to close communication into and out of the stent. The shut-off valve 124 is closed and if desired, the pump 122 is disconnected from the inflation conduit 72 by coupling 126.
Should it be determined that the stent has been inflated too much, the plunger 120 is actuated to move the release wire 110 to open the check valve 108 as has previously been described. A needle valve 128 on the release plunger 116 is then actuated to open communication with the inflation conduit 72 to bleed off a quantity of the inflation medium through a vent opening 130 of the release plunger 116. That way, the inflation medium is removed from the stent to deflate it, as needed. This could occur if it is later determined after deployment that the stent is in a position in the vasculature that is not optimum, or if the stent is initially over inflated.
At such time as the prosthesis is completely inflated to support the vasculature, the inflation conduit 72 is rotated in the opposite direction from that used to connect the inflation conduit to the stent 10, 50. The inflation conduit 72 is withdrawn from the vasculature and the vasculature is then closed in the normal manner.
FIG. 5 is a perspective view showing that it is also within the scope of the present invention to combine the stent 50 with a graft 132. The graft 132 is a hollow tube of prosthetic material such as Dacron, that is secured to the stent 50 such as by sewing, gluing and the like. The graft further helps to ensure blood flow through the vasculature and to reduce the risk of an aneurysm rupturing, as is well known to those skilled in the art.
It is intended that the foregoing description be only representative of the present invention and that the present invention be only limited by it hereinafter appended claims.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3868986||Jan 4, 1974||Mar 4, 1975||Ford Motor Co||Pattern alignment means for use with lost foam molding process|
|US4140126||Feb 18, 1977||Feb 20, 1979||Choudhury M Hasan||Method for performing aneurysm repair|
|US4183102||Sep 8, 1977||Jan 15, 1980||Jacques Guiset||Inflatable prosthetic device for lining a body duct|
|US4416028||Jun 4, 1980||Nov 22, 1983||Ingvar Eriksson||Blood vessel prosthesis|
|US4503569||Mar 3, 1983||Mar 12, 1985||Dotter Charles T||Transluminally placed expandable graft prosthesis|
|US4512338||Jan 25, 1983||Apr 23, 1985||Balko Alexander B||Process for restoring patency to body vessels|
|US4994071||May 22, 1989||Feb 19, 1991||Cordis Corporation||Bifurcating stent apparatus and method|
|US5104404||Jun 20, 1991||Apr 14, 1992||Medtronic, Inc.||Articulated stent|
|US5192310||Sep 16, 1991||Mar 9, 1993||Atrium Medical Corporation||Self-sealing implantable vascular graft|
|US5320100||Mar 12, 1993||Jun 14, 1994||Atrium Medical Corporation||Implantable prosthetic device having integral patency diagnostic indicia|
|US5330528 *||Nov 30, 1990||Jul 19, 1994||British Technology Group Limited||Vascular surgical devices|
|US5370681||Mar 12, 1993||Dec 6, 1994||Atrium Medical Corporation||Polyumenal implantable organ|
|US5370691||Jan 26, 1993||Dec 6, 1994||Target Therapeutics, Inc.||Intravascular inflatable stent|
|US5382261||Sep 1, 1992||Jan 17, 1995||Expandable Grafts Partnership||Method and apparatus for occluding vessels|
|US5411550||Aug 19, 1993||May 2, 1995||Atrium Medical Corporation||Implantable prosthetic device for the delivery of a bioactive material|
|US5449373||Mar 17, 1994||Sep 12, 1995||Medinol Ltd.||Articulated stent|
|US5514154||Jul 28, 1994||May 7, 1996||Advanced Cardiovascular Systems, Inc.||Expandable stents|
|US5549663||Mar 9, 1994||Aug 27, 1996||Cordis Corporation||Endoprosthesis having graft member and exposed welded end junctions, method and procedure|
|US5554180 *||Jul 7, 1995||Sep 10, 1996||Aeroquip Corporation||Intraluminal stenting graft|
|US5569295||May 31, 1995||Oct 29, 1996||Advanced Cardiovascular Systems, Inc.||Expandable stents and method for making same|
|US5591197||Mar 14, 1995||Jan 7, 1997||Advanced Cardiovascular Systems, Inc.||Expandable stent forming projecting barbs and method for deploying|
|US5603721||Nov 13, 1995||Feb 18, 1997||Advanced Cardiovascular Systems, Inc.||Expandable stents and method for making same|
|US5649978 *||Oct 25, 1994||Jul 22, 1997||Target Therapeutics, Inc.||Temporary inflatable intravascular prosthesis|
|US5697971||Jun 11, 1996||Dec 16, 1997||Fischell; Robert E.||Multi-cell stent with cells having differing characteristics|
|US5728131||Jun 12, 1995||Mar 17, 1998||Endotex Interventional Systems, Inc.||Coupling device and method of use|
|US5733303||May 31, 1995||Mar 31, 1998||Medinol Ltd.||Flexible expandable stent|
|US5735893||Jan 14, 1997||Apr 7, 1998||Advanced Cardiovascular Systems, Inc.||Expandable stents and method for making same|
|US5776161||Oct 16, 1995||Jul 7, 1998||Instent, Inc.||Medical stents, apparatus and method for making same|
|US5776183||Aug 23, 1996||Jul 7, 1998||Kanesaka; Nozomu||Expandable stent|
|US5782789||Oct 19, 1994||Jul 21, 1998||Atrium Medical Corporation||Macrochannel phosthetic/delivery patch|
|US5800515||Aug 1, 1996||Sep 1, 1998||B. Braun Celsa (Societe Anonyme)||Prosthesis implantable in a human or animal duct such as a stent or a prosthesis for aneurism|
|US5810872||Mar 14, 1997||Sep 22, 1998||Kanesaka; Nozomu||Flexible stent|
|US5827321||Feb 7, 1997||Oct 27, 1998||Cornerstone Devices, Inc.||Non-Foreshortening intraluminal prosthesis|
|US5836964||Oct 30, 1996||Nov 17, 1998||Medinol Ltd.||Stent fabrication method|
|USB14733665||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US6953476||Mar 27, 2000||Oct 11, 2005||Neovasc Medical Ltd.||Device and method for treating ischemic heart disease|
|US7150758||Mar 6, 2003||Dec 19, 2006||Boston Scientific Santa Rosa Corp.||Kink resistant endovascular graft|
|US7407508 *||Sep 29, 2003||Aug 5, 2008||Terumo Kabushiki Kaisha||Indwelling stent and living organ dilator|
|US7540881||Dec 22, 2005||Jun 2, 2009||Boston Scientific Scimed, Inc.||Bifurcation stent pattern|
|US7578841||Jun 6, 2005||Aug 25, 2009||Boston Scientific Scimed, Inc.||Stent with protruding branch portion for bifurcated vessels|
|US7678217||Mar 16, 2010||Trivascular2, Inc.||Method for manufacturing an endovascular graft section|
|US7731654||May 13, 2005||Jun 8, 2010||Merit Medical Systems, Inc.||Delivery device with viewing window and associated method|
|US7731741 *||Sep 8, 2005||Jun 8, 2010||Boston Scientific Scimed, Inc.||Inflatable bifurcation stent|
|US7758634||Jul 20, 2010||Boston Scientific Scimed, Inc.||Bifurcated stent and delivery system|
|US7766954||Aug 3, 2010||Trivascular2, Inc.||Advanced endovascular graft|
|US7803178||Sep 28, 2010||Trivascular, Inc.||Inflatable porous implants and methods for drug delivery|
|US7815675||Oct 19, 2010||Boston Scientific Scimed, Inc.||Stent with protruding branch portion for bifurcated vessels|
|US7833264||Mar 6, 2006||Nov 16, 2010||Boston Scientific Scimed, Inc.||Bifurcated stent|
|US7833266||Nov 28, 2007||Nov 16, 2010||Boston Scientific Scimed, Inc.||Bifurcated stent with drug wells for specific ostial, carina, and side branch treatment|
|US7842081||Nov 30, 2010||Boston Scientific Scimed, Inc.||Stent with spiral side-branch|
|US7842082||Nov 30, 2010||Boston Scientific Scimed, Inc.||Bifurcated stent|
|US7846199||Nov 18, 2008||Dec 7, 2010||Cook Incorporated||Remodelable prosthetic valve|
|US7850725||Jun 15, 2006||Dec 14, 2010||Boston Scientific Scimed, Inc.||Extendible stent apparatus|
|US7875068||Sep 30, 2003||Jan 25, 2011||Merit Medical Systems, Inc.||Removable biliary stent|
|US7887579||Feb 15, 2011||Merit Medical Systems, Inc.||Active stent|
|US7892279||Feb 22, 2011||Boston Scientific Scimed, Inc.||Extendible stent apparatus|
|US7922758||Jun 20, 2007||Apr 12, 2011||Boston Scientific Scimed, Inc.||Nesting twisting hinge points in a bifurcated petal geometry|
|US7951191||May 31, 2011||Boston Scientific Scimed, Inc.||Bifurcated stent with entire circumferential petal|
|US7951192||Aug 25, 2009||May 31, 2011||Boston Scientific Scimed, Inc.||Stent with protruding branch portion for bifurcated vessels|
|US7959669||Sep 12, 2007||Jun 14, 2011||Boston Scientific Scimed, Inc.||Bifurcated stent with open ended side branch support|
|US7959671||Jun 14, 2011||Merit Medical Systems, Inc.||Differential covering and coating methods|
|US8007528||May 23, 2007||Aug 30, 2011||Boston Scientific Scimed, Inc.||Bifurcated stent|
|US8016878||Jun 1, 2009||Sep 13, 2011||Boston Scientific Scimed, Inc.||Bifurcation stent pattern|
|US8038706||Oct 18, 2011||Boston Scientific Scimed, Inc.||Crown stent assembly|
|US8043366||Sep 8, 2005||Oct 25, 2011||Boston Scientific Scimed, Inc.||Overlapping stent|
|US8066755||Nov 29, 2011||Trivascular, Inc.||System and method of pivoted stent deployment|
|US8083789||Dec 27, 2011||Trivascular, Inc.||Securement assembly and method for expandable endovascular device|
|US8118861||Mar 28, 2007||Feb 21, 2012||Boston Scientific Scimed, Inc.||Bifurcation stent and balloon assemblies|
|US8197534||Mar 30, 2006||Jun 12, 2012||Cook Medical Technologies Llc||Valve device with inflatable chamber|
|US8206429||Nov 2, 2006||Jun 26, 2012||Boston Scientific Scimed, Inc.||Adjustable bifurcation catheter incorporating electroactive polymer and methods of making and using the same|
|US8206436||Jun 26, 2012||Merit Medical Systems, Inc.||Coated stent with geometry determinated functionality and method of making the same|
|US8216267||Sep 12, 2006||Jul 10, 2012||Boston Scientific Scimed, Inc.||Multilayer balloon for bifurcated stent delivery and methods of making and using the same|
|US8216299||Jul 10, 2012||Cook Medical Technologies Llc||Method to retract a body vessel wall with remodelable material|
|US8226701||Jul 24, 2012||Trivascular, Inc.||Stent and delivery system for deployment thereof|
|US8241349||Feb 3, 2011||Aug 14, 2012||Boston Scientific Scimed, Inc.||Extendible stent apparatus|
|US8257425||Dec 4, 2006||Sep 4, 2012||Boston Scientific Scimed, Inc.||Stent with protruding branch portion for bifurcated vessels|
|US8267989||Aug 20, 2010||Sep 18, 2012||Trivascular, Inc.||Inflatable porous implants and methods for drug delivery|
|US8277501||Oct 2, 2012||Boston Scientific Scimed, Inc.||Bi-stable bifurcated stent petal geometry|
|US8298278||Oct 30, 2012||Boston Scientific Scimed, Inc.||Bifurcated stent with improvement securement|
|US8298280||Oct 30, 2012||Boston Scientific Scimed, Inc.||Stent with protruding branch portion for bifurcated vessels|
|US8317855||Nov 27, 2012||Boston Scientific Scimed, Inc.||Crimpable and expandable side branch cell|
|US8328861||Nov 16, 2007||Dec 11, 2012||Trivascular, Inc.||Delivery system and method for bifurcated graft|
|US8343211||Dec 14, 2005||Jan 1, 2013||Boston Scientific Scimed, Inc.||Connectors for bifurcated stent|
|US8361136||Sep 25, 2009||Jan 29, 2013||Trivascular, Inc.||Endovascular graft|
|US8425590||May 31, 2011||Apr 23, 2013||Boston Scientific Scimed, Inc.||Stent with protruding branch portion for bifurcated vessels|
|US8435284||May 7, 2013||Boston Scientific Scimed, Inc.||Telescoping bifurcated stent|
|US8454679||Jul 10, 2009||Jun 4, 2013||Atrial Systems, Llc||Endovascular conduit device for increasing safety of cardiac lead extraction and other vascular procedures|
|US8454680||Oct 1, 2010||Jun 4, 2013||Atrial Systems, Llc||Endovascular conduit device with low profile occlusion members|
|US8480728||May 26, 2005||Jul 9, 2013||Boston Scientific Scimed, Inc.||Stent side branch deployment initiation geometry|
|US8556954||Oct 21, 2009||Oct 15, 2013||Neovasc Medical Ltd||Methods for treating abnormal growths in the body using a flow reducing implant|
|US8556955||Jun 22, 2012||Oct 15, 2013||Boston Scientific Scimed, Inc.||Adjustable bifurcation catheter incorporating electroactive polymer and methods of makings and using the same|
|US8647376||Mar 30, 2007||Feb 11, 2014||Boston Scientific Scimed, Inc.||Balloon fold design for deployment of bifurcated stent petal architecture|
|US8663309||Sep 26, 2007||Mar 4, 2014||Trivascular, Inc.||Asymmetric stent apparatus and method|
|US8702776 *||Mar 18, 2013||Apr 22, 2014||Paul Heltai||Method for deploying a sleeve and tubing device for restricting and constricting aneurysms and a sleeve and tubing device and system|
|US8747456||Dec 31, 2008||Jun 10, 2014||Boston Scientific Scimed, Inc.||Bifurcation stent delivery system and methods|
|US8801769||Jan 9, 2013||Aug 12, 2014||Trivascular, Inc.||Endovascular graft|
|US8801776 *||Feb 24, 2009||Aug 12, 2014||Medtronic Vascular, Inc.||Infundibular reducer devices|
|US8858612||Sep 13, 2013||Oct 14, 2014||Neovasc Medical Inc.||Methods for treating abnormal growths in the body using a flow reducing implant|
|US8932340||May 29, 2008||Jan 13, 2015||Boston Scientific Scimed, Inc.||Bifurcated stent and delivery system|
|US8992595||Mar 13, 2013||Mar 31, 2015||Trivascular, Inc.||Durable stent graft with tapered struts and stable delivery methods and devices|
|US9017348||Jun 6, 2007||Apr 28, 2015||Luiz Gonzaga Granja Filho||Insufflable prosthesis for anastomosis|
|US9017397||Jun 11, 2012||Apr 28, 2015||Cook Medical Technologies Llc||Valve device with inflatable chamber|
|US20030097172 *||Mar 27, 2001||May 22, 2003||Ilan Shalev||Narrowing implant|
|US20040127972 *||Sep 29, 2003||Jul 1, 2004||Terumo Kabushiki Kaisha||Indwelling stent and living organ dilator|
|US20040176836 *||Mar 6, 2003||Sep 9, 2004||Trivascular, Inc.||Kink resistant endovascular graft|
|US20040267352 *||Mar 17, 2004||Dec 30, 2004||Davidson Charles J.||Stent with protruding branch portion for bifurcated vessels|
|US20050055082 *||Oct 3, 2002||Mar 10, 2005||Shmuel Ben Muvhar||Flow reducing implant|
|US20060036315 *||Jun 6, 2005||Feb 16, 2006||Advanced Stent Technologies, Inc.||Stent with protruding branch portion for bifurcated vessels|
|US20060085061 *||Nov 4, 2005||Apr 20, 2006||Vardi Gil M||Extendible stent apparatus and method for deploying the same|
|US20060106449 *||Aug 7, 2003||May 18, 2006||Neovasc Medical Ltd.||Flow reducing implant|
|US20060106450 *||Apr 10, 2003||May 18, 2006||Neovasc Medical Ltd.||Geometric flow regulator|
|US20060167538 *||Dec 21, 2005||Jul 27, 2006||Rucker Brian K||Inflatable biliary stent|
|US20060235512 *||Mar 30, 2006||Oct 19, 2006||Cook Incorporated||Valve device with inflatable chamber|
|US20060241740 *||Jun 15, 2006||Oct 26, 2006||Advanced Stent Technologies, Inc.||Extendible stent apparatus|
|US20070032855 *||Oct 10, 2006||Feb 8, 2007||Advanced Stent Technologies, Inc.||Extendible stent apparatus|
|US20070034209 *||Nov 22, 2003||Feb 15, 2007||Lotfy Wael M N||Lined balloon mounted stent|
|US20070050016 *||Aug 29, 2005||Mar 1, 2007||Boston Scientific Scimed, Inc.||Stent with expanding side branch geometry|
|US20070055356 *||Sep 8, 2005||Mar 8, 2007||Boston Scientific Scimed, Inc.||Inflatable bifurcation stent|
|US20070078509 *||Nov 23, 2003||Apr 5, 2007||Lotfy Wael M N||Valved balloon stent|
|US20070112419 *||Nov 27, 2006||May 17, 2007||Boston Scientific Scimed, Inc.||Stent with spiral side-branch|
|US20070142904 *||Dec 20, 2005||Jun 21, 2007||Boston Scientific Scimed, Inc.||Bifurcated stent with multiple locations for side branch access|
|US20070150046 *||Dec 22, 2005||Jun 28, 2007||Meyer Michael P||Bifurcation stent pattern|
|US20070208415 *||Mar 6, 2006||Sep 6, 2007||Kevin Grotheim||Bifurcated stent with controlled drug delivery|
|US20070225798 *||Mar 23, 2006||Sep 27, 2007||Daniel Gregorich||Side branch stent|
|US20070260304 *||May 2, 2006||Nov 8, 2007||Daniel Gregorich||Bifurcated stent with minimally circumferentially projected side branch|
|US20080051879 *||Aug 23, 2007||Feb 28, 2008||Cook Incorporated||Methods of treating venous valve related conditions with a flow-modifying implantable medical device|
|US20080228257 *||Mar 15, 2007||Sep 18, 2008||Jacob Richter||Covered stent balloon and method of using same|
|US20100010502 *||Jul 10, 2009||Jan 14, 2010||Sumit Verma||Endovascular conduit device for increasing safety of cardiac lead extraction and other vascular procedures|
|US20100049306 *||Feb 24, 2009||Feb 25, 2010||Medtronic Vascular, Inc.||Infundibular Reducer Devices|
|US20100114299 *||Oct 21, 2009||May 6, 2010||Neovasc Medical Ltd.||Flow reducing implant|
|US20100249812 *||Jun 6, 2007||Sep 30, 2010||Luiz Gonzaga Granja Filho||Insufflable prosthesis for anastomose|
|US20110082465 *||Apr 7, 2011||Atrial Systems, Llc||Endovascular conduit device with low profile occlusion members|
|US20110112625 *||May 27, 2010||May 12, 2011||Neovasc Medical Ltd.||Varying diameter vascular implant and balloon|
|US20130268048 *||Mar 15, 2013||Oct 10, 2013||Trivascular, Inc.||Delivery catheter for endovascular device|
|CN104013481A *||Mar 3, 2013||Sep 3, 2014||王光强||Sacculus support for tracheal stenosis patient|
|EP1534180A1 *||Apr 10, 2003||Jun 1, 2005||Neovasc Medical Ltd.||Geometric flow regulator|
|WO2004014257A1 *||Apr 10, 2003||Feb 19, 2004||Neovasc Medical Ltd.||Geometric flow regulator|
|WO2005027790A1 *||Nov 23, 2003||Mar 31, 2005||Wael Mohamed Nabil Lotfy||Valved balloon stent|
|WO2005027791A1 *||Nov 22, 2003||Mar 31, 2005||Wael Mohamed Nabil Lotfy||Lined balloon mounted stent|
|WO2006071707A1 *||Dec 21, 2005||Jul 6, 2006||Wilson-Cook Medical Inc.||Inflatable biliary stent|
|WO2007140563A2 *||Jun 6, 2007||Dec 13, 2007||Filho Luiz Gonzaga Granja||Insufflable prosthesis for anastomose|
|WO2012099704A3 *||Jan 17, 2012||Dec 12, 2013||Novita Therapeutics, Llc||Blockstent device and methods of use|
|WO2014150403A1 *||Mar 11, 2014||Sep 25, 2014||Cook Medical Technologies Llc||Medical device with selective rigidity|
|International Classification||A61F2/82, A61F2/02|
|Cooperative Classification||A61F2/82, A61F2002/9534, A61F2/91, A61F2250/0003|
|Nov 29, 2004||AS||Assignment|
Owner name: BOSTON SCIENTIFIC CORPORATION, MASSACHUSETTS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TRIVASCULAR, INC.;REEL/FRAME:015409/0438
Effective date: 20041124
|Mar 1, 2005||AS||Assignment|
Owner name: TRIVASCULAR, INC., CALIFORNIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TAHERI, SYDE A.;REEL/FRAME:015711/0336
Effective date: 20041105
|Apr 13, 2005||REMI||Maintenance fee reminder mailed|
|Sep 26, 2005||LAPS||Lapse for failure to pay maintenance fees|
|Nov 22, 2005||FP||Expired due to failure to pay maintenance fee|
Effective date: 20050925