Patent application number | Description | Published |
20080208244 | VARIABLE THICKNESS EMBOLIC FILTERING DEVICES AND METHODS OF MANUFACTURING THE SAME - A strut assembly to be used in conjunction with an embolic filtering device has varying strut thicknesses, with the thickness selected based at least in part on the flexing characteristics of the particular portion of the strut assembly. The strut assembly is formed with patterns having flexing portions and stable portions, with the flexing portions contributing to the flexibility of the strut assembly during delivery and recovery in the patient's vasculature. The stable portions remain relatively unflexed and stiff when being delivered or recovered from the patient's vasculature. The stable portions provide strength and increased radiopacity to the strut assembly which is needed when the strut assembly is deployed in the body vessel. The flexing portions act much like a mechanical hinges in providing the needed flexibility to resiliently bend when being delivered through tortuous anatomy of the patient. | 08-28-2008 |
20080288056 | RADIOPAQUE MARKERS COMPRISING BINARY ALLOYS OF TITANIUM - There is disclosed a radiopaque marker comprising a binary alloy of titanium and one binary element selected from platinum, palladium, rhodium, and gold. There is also disclosed various medical devices, such as stents, guidewires and embolic filters, that have the radiopaque marker attached thereto. Methods of attaching the radiopaque marker to the medical devices, such as by welding, are also disclosed. | 11-20-2008 |
20090099645 | Radiopaque markers and medical devices comprising binary alloys of titanium - There is disclosed medical devices, such as stents, guidewires and embolic filters, comprising a binary alloy of titanium and one binary element selected from platinum, palladium, rhodium, and gold. There is also disclosed a radiopaque marker comprising the disclosed binary alloy, as well as medical devices having the radiopaque marker attached thereto. Methods of attaching the radiopaque marker to the medical devices, such as by welding, are also disclosure also disclosed. | 04-16-2009 |
20090248130 | NITINOL ALLOY DESIGN AND COMPOSITION FOR VASCULAR STENTS - A stent and a delivery system for implanting the stent in a body lumen is disclosed. The stent is made from a superelastic alloy such as nickel-titanium or nitinol, and includes a ternary element in order to minimize the stress hysteresis of the superelastic material. The stress hysteresis is defined by the difference between the loading plateau stress and the unloading plateau stress of the superelastic material. The resulting delivery system has a small profile and includes a sheath covering the stent that has a thin wall. | 10-01-2009 |
20100114295 | THERMOELASTIC AND SUPERELASTIC NI-TI-W ALLOY - A radiopaque nitinol stent for implantation in a body lumen is disclosed. The stent is made from a superelastic alloy such as nickel-titanium or nitinol, and includes a ternary element including tungsten. The added tungsten in specified amounts improve the radiopacity of the nitinol stent comparable to that of a stainless steel stent of the same strut pattern coated with a thin layer of gold. Furthermore, the nitinol stent has improved radiopacity yet retains its superelastic and shape memory behavior and further maintains a thin strut/wall thickness for high flexibility. | 05-06-2010 |
20110288622 | EXPANDABLE ENDOPROSTHESES, SYSTEMS, AND METHODS FOR TREATING A BIFURCATED LUMEN - An endoprosthesis for treating a bifurcated lumen. The distal end of the endoprosthesis can include at least two wings and at least two troughs so the endoprosthesis can adequately scaffold the ostium of a bifurcated lumen by at least partially straddling the carina of the lumen bifurcation. The distal end of the endoprosthesis can also be configured to have increased expandability to help allow conformity to the anatomy of a bifurcated lumen. | 11-24-2011 |
20130166014 | THERMOELASTIC AND SUPERELASTIC NI-TI-W ALLOY - A radiopaque nitinol stent for implantation in a body lumen is disclosed. The stent is made from a superelastic alloy such as nickel-titanium or nitinol, and includes a ternary element including tungsten. The added tungsten in specified amounts improve the radiopacity of the nitinol stent comparable to that of a stainless steel stent of the same strut pattern coated with a thin layer of gold. Furthermore, the nitinol stent has improved radiopacity yet retains its superelastic and shape memory behavior and further maintains a thin strut/wall thickness for high flexibility. | 06-27-2013 |
20140243947 | THERMOELASTIC AND SUPERELASTIC NI-TI-W ALLOY - A radiopaque nitinol stent for implantation in a body lumen is disclosed. The stent is made from a superelastic alloy such as nickel-titanium or nitinol, and includes a ternary element including tungsten. The added tungsten in specified amounts improve the radiopacity of the nitinol stent comparable to that of a stainless steel stent of the same strut pattern coated with a thin layer of gold. Furthermore, the nitinol stent has improved radiopacity yet retains its superelastic and shape memory behavior and further maintains a thin strut/wall thickness for high flexibility. | 08-28-2014 |
20140255246 | MEDICAL DEVICE HAVING NIOBIUM NITINOL ALLOY - Guide wire devices and other intra-corporal medical devices fabricated from a Ni—Ti—Nb alloy and methods for their manufacture. The Ni—Ti alloy includes nickel, titanium, and niobium either up to its solubility limit in Ni—Ti, or in amounts over 15 atomic percent so as to provide a dual phase alloy. In either case, the Ni—Ti—Nb alloy provides increased stiffness to provide better torque response, steerability, stent scaffolding strength, and similar properties associated with increased stiffness, while still providing super-elastic or linear pseudo-elastic properties. | 09-11-2014 |
20140257247 | GUIDE WIRE UTILIZING A NICKEL-TITANIUM ALLOY HAVING HIGH ELASTIC MODULUS IN THE MARTENSITIC PHASE - Guide wire devices fabricated from a linear pseudo-elastic Ni—Ti alloy and methods for their manufacture. The Ni—Ti alloy that includes nickel, titanium, and about 3 atomic % (at %) to about 30 at % niobium (Nb). Cold working the Ni—Ti alloy stabilizes the alloy's martensitic phase and yields a linear pseudo-elastic microstructure where reversion to the austenite phase is retarded or altogether blocked. The martensitic phase of cold worked, linear pseudo-elastic Ni—Ti—Nb alloy has an elastic modulus that is considerably higher than the comparable cold worked, linear pseudoelastic binary Ni—Ti alloy. This yields a guide wire device that has better torque response and steerability as compared to cold worked, linear pseudoelastic binary Ni—Ti alloy or superelastic binary Ni—Ti alloy. | 09-11-2014 |
20140257451 | MEDICAL DEVICE UTILIZING A NICKEL-TITANIUM TERNARY ALLOY HAVING HIGH ELASTIC MODULUS - Medical devices that include a Ni—Ti ternary alloy and methods for their manufacture. The medical devices described herein include at least one part fabricated from the Ni—Ti ternary alloy. In the Ni—Ti alloys, the ternary alloying element is selected to be compatible with Ni—Ti. Example Ni—Ti ternary alloys include nickel (Ni), titanium (Ti), and one or more of tantalum (Ta), hafnium (Hf), vanadium (V), zirconium (Zr), scandium (Sc), or yttrium (Y). By virtue of their compatibility with Ni—Ti, additions of the ternary alloying element(s) may substitute for titanium in the Ni—Ti phase up to the solubility of the ternary element and the remainder can exist as a second phase whose mechanical properties resemble that of the pure ternary element and whose elastic modulus exceeds that of the Ni—Ti matrix. | 09-11-2014 |