Xtent, Inc. Patent applications |
Patent application number | Title | Published |
20130211494 | DEVICES AND METHODS FOR CONTROLLING EXPANDABLE PROSTHESES DURING DEPLOYMENT - Prosthesis delivery devices and methods are provided that enable precise control of prosthesis position during deployment. The catheter for delivering a prosthesis to a treatment site in a body lumen typically carries one or more self-expanding tubular prostheses within a sheath. A radially expandable control member is positionable within the prostheses and has an expanded shape which engages an inner surface of the prostheses to urge the prostheses outwardly against the sheath. The radially expandable control member therefore controls axial position of the prostheses during deployment. Thus one or more prostheses may be deployed at a treatment site precisely. When multiple prostheses are deployed, excessive spacing or overlap between adjacent prostheses is minimized. The prostheses of the present invention are often deployed in stenotic lesions in peripheral arteries as well as coronary arteries and other body lumens. | 08-15-2013 |
20110178589 | APPARATUS AND METHODS FOR DELIVERY OF BRAIDED PROSTHESES - Blood vessels and other body lumens are expanded using an evertible braided prosthesis. The braided prosthesis is delivered to the blood vessel in a radially collapsed configuration. A leading edge of the braided prosthesis is then everted so that it expands as it is advanced through the blood vessel. Optionally, the prosthesis can be provided with a biologically active substance in order to inhibit hyperplasia or have other desired biological effects. | 07-21-2011 |
20110152996 | APPARATUS AND METHODS FOR DELIVERY OF MULTIPLE DISTRIBUTED STENTS - Delivery catheters and systems are adapted for delivering multiple discreet prostheses in body lumens. An exemplary delivery catheter comprises a sheath, a pusher for moving the prostheses relative to the sheath, and a valve member for selectively retaining the prostheses in the sheath. For balloon expandable stents, an elongated shaft and an expandable member are slidably disposed in the sheath, and the prostheses are positionable on the expandable member for deployment in the body lumen. The valve member allows a selected number of prostheses to be deployed from the sheath while retaining other prostheses within the sheath. | 06-23-2011 |
20110125248 | CUSTOM LENGTH STENT APPARATUS - Apparatus and methods for delivering prosthetic segments to a body lumen, utilize a device having an elongated flexible member including proximal and distal ends, a plurality of prosthetic segments releasably arranged axially along the elongated flexible member near the distal end and an outer sheath slidably disposed over at least a portion of the prosthetic segments. The apparatus further includes a separator disposed on the outer sheath and adapted to engage the prosthetic segments. The separator is also adapted to be retracted proximally over the prosthetic segments and advanced distally to separate a proximal group of the prosthetic segments from a distal group of the prosthetic segments which are to be deployed in the body lumen. | 05-26-2011 |
20110093056 | Use of Plasma in Formation of Biodegradable Stent Coating - Metallic stents are treated with a gaseous species in a plasma state under conditions causing the species to polymerize and to be deposited in polymerized form on the metallic stent surface prior to the application of a drug-polymer mixture, which is done by conventional non-plasma deposition methods. The drug-polymer mixture once applied forms a coating on the stent surface that releases the drug in a time-release manner and gradually erodes, leaving only the underlying plasma-deposited polymer. In certain cases, the plasma-deposited polymer itself erodes or dissolves into the physiological medium over an extended period of time, leaving only the metallic stent. While the various polymers and drug remain on the stent, the plasma-deposited polymer enhances the adhesion of the drug-polymer anchor coating and maintains the coating intact upon exposure to the mechanical stresses encountered during stent deployment. | 04-21-2011 |
20110022148 | THERMO-MECHANICALLY CONTROLLED IMPLANTS AND METHODS OF USE - An implant comprises a structure that may be implanted into tissue and that has a first material property at normal body temperature. The first material property is variable at elevated temperatures above normal body temperature. The implant also has a plurality of particles dispersed in the structure that are adapted to convert incident radiation into heat energy when irradiated with electromagnetic radiation. The particles are in thermal contact with the structure such that exposure of the particles to incident radiation raises the temperature of the structure thereby changing the first material property relative to the first material property at normal body temperature. | 01-27-2011 |
20100004729 | APPARATUS AND METHODS FOR DELIVERY OF MULTIPLE DISTRIBUTED STENTS - Blood vessels and other body lumens are stented using multiple, discreet stent structures. Stent structures may be balloon expandable or self-expanding and are delivered by a delivery catheter which is repositioned to spaced-apart delivery sights. By coating the stents with particular biologically active substances, hyperplasia within and between the implanted stents can be inhibited. An exemplary delivery catheter comprises a catheter body having both a pusher rod for advancing the stents relative to a sheath and a reciprocatable delivery catheter for implanting the stents. | 01-07-2010 |
20090299461 | BALLOON CATHETER FOR MULTIPLE ADJUSTABLE STENT DEPLOYMENT - A catheter configured to carry one or more stents and having an inflatable balloon for expanding a stent surrounding the balloon. The catheter is characterized in having a positioner for moving the one or more stents relative to the balloon from a first position in which the stent does not surround the balloon to a second position in which the stent surrounds the balloon. Also disclosed is a method for deploying a stent at a desired location in the vascular system. | 12-03-2009 |
20090299458 | BALLOON CATHETER FOR MULTIPLE ADJUSTABLE STENT DEPLOYMENT - A catheter configured to carry one or more stents and having an inflatable balloon for expanding a stent surrounding the balloon. The catheter is characterized in having a positioner for moving the one or more stents relative to the balloon torn a first position in which the stent does not surround the balloon to a second position in which the stent surrounds the balloon. Also disclosed is a method for deploying a stent at a desired location in the vascular system. | 12-03-2009 |
20090276031 | APPARATUS AND METHODS FOR DEPLOYMENT OF MULTIPLE CUSTOM-LENGTH PROSTHESES (II) - Apparatus for delivering stents to body lumens include one or more tubular prostheses carried at the distal end of a catheter shaft, a sheath slidably disposed over the prostheses, and a guidewire tube extending from within the sheath to the exterior of the sheath through an exit port in a sidewall thereof A guidewire extends slidably through the guidewire tube. The sheath can be moved relative to the catheter shaft and the guidewire tube to expose the prostheses for deployment. Methods of delivering stents are also provided. | 11-05-2009 |
20090264979 | MULTIPLE INDEPENDENT NESTED STENT STRUCTURES AND METHODS FOR THEIR PREPARATION AND DEPLOYMENT - Blood vessels and other body lumens are stented using stent structures comprising a plurality of radially expansible rings where at least some of the rings comprise axially extending elements which interleave with axially extending elements on adjacent unconnected rings. The ring structures may be open cell structures or closed cell structures, and the axially extending elements will typically be formed as part of the open cell or closed cell structure. | 10-22-2009 |
20090248137 | EXPANDABLE STENT - An expandable stent comprising a tubular body made up of a plurality of separated tubular elements ( | 10-01-2009 |
20090149863 | FIXED STENT DELIVERY DEVICES AND METHODS - Stent delivery devices and methods include multiple stents or stent segments mounted at fixed positions on an expandable member of the stent delivery catheter. One or more of the fixed-position stents may be selectively deployed in a body lumen such as a blood vessel by positioning one or more sheaths to constrain some stents while exposing others for deployment. Some embodiments include two axially movable sheaths for serially deploying stents while containing a portion of the expandable balloon from which stents have been deployed. Other embodiments include inner and outer balloon shafts to allow the balloon to be retracted into the delivery catheter as stents are deployed. Devices and methods of the invention provide enhanced serial deployment of multiple stents or stent segments while reducing the risk of damage to an expandable deployment member. | 06-11-2009 |
20090105686 | ADJUSTABLE-LENGTH DRUG DELIVERY BALLOON - A drug or agent coated balloon having a length which is adjustable in vivo is described herein. The balloon is configured to be coated or coatable with one or more drugs where the coating may be applied prior to advancement into a patient body or prior to balloon expansion within the patient body. The length of the expandable portion of the balloon is adjustable to approximate a length of the tissue region to be treated. Moreover, the drug-coated balloon may be used alone or it may be utilized to deploy luminal prostheses having one or more linked or otherwise coupled segments. | 04-23-2009 |
20090088832 | APPARATUS AND METHODS FOR DELIVERY OF VARIABLE LENGTH STENTS - Blood vessels and other body lumens are stented using multiple, discrete stent structures, or continuous coiled or mesh stent structures. Stent structures may be a balloon expandable or self-expanding and are delivered by a delivery catheter which is repositioned to spaced-apart delivery sites. By coating the stents with particular biologically active substances, hyperplasia within and between the implanted stents can be inhibited. An exemplary delivery catheter comprises a catheter body having a deployment mechanism for deploying one or more stents of selectable length into the vessel. | 04-02-2009 |
20090076584 | APPARATUS AND METHODS FOR DEPLOYMENT OF MULTIPLE CUSTOM-LENGTH PROSTHESES - A catheter for delivering a prosthesis to a target treatment site comprises an inner shaft and an expansion member coupled to the inner shaft. A plurality of radially expandable prosthetic segments are positionable over the expansion member and they are releasably interlocked with one another while unexpanded. Adjacent pairs of prosthetic segments may decouple from one another upon radial expansion of the distal prosthetic segment in the adjacent pair while the proximal segment in the pair remains at least partially unexpanded. The catheter also includes an outer sheath that is axially movable and positionable at least partially over the prosthetic segments to constrain expansion of a selectable number of segments. A segment mover is coupled to at least one of the prosthetic segments and is axially movable so as to retract one or more of the segments when the one or more prosthetic segments are unexpanded. | 03-19-2009 |
20080269865 | Custom Length Stent Apparatus - Apparatus and methods for delivering prosthetic segments to a body lumen include an elongated flexible member having both proximal and distal ends along with a plurality of prosthetic segments releasably arranged axially along the elongated flexible member near the distal end. Additionally, the apparatus has a sheath slidably disposed over at least a portion of the prosthetic segments and an outer shaft slidably disposed over at least a portion of the sheath. A separator is disposed on the outer shaft and is biased into engagement with at least one prosthetic segment so that the outer shaft may be retracted to separate a proximal group of prosthetic segments from a distal group of prosthetic segments which are to be deployed into the body lumen. The sheath is positionable between the separator and the prosthetic segments to selectively disengage the separator from the prosthetic segments. | 10-30-2008 |
20080234799 | CUSTOM-LENGTH STENT DELIVERY SYSTEM WITH INDEPENDENTLY OPERABLE EXPANSION ELEMENTS - A stent delivery system for delivering a plurality of stent segments to at least one treatment site includes a catheter shaft having a proximal end and a distal end, a plurality of expandable members arranged axially along the catheter shaft near the distal end, a plurality of stent segments, and a selecting mechanism adapted for selecting one or more expandable members for expansion. Each expandable member is expandable independently of at least one other expandable member, and each expandable member has at least one stent segment positioned on it. One or more of the expandable members may be selectively expanded to deploy the one or more stent segments positioned thereon at the treatment site. | 09-25-2008 |
20080234798 | APPARATUS AND METHODS FOR DELIVERY OF MULTIPLE DISTRIBUTED STENTS - Blood vessels and other body lumens are stented using multiple, discreet stent structures. Stent structures may be balloon expandable or self-expanding and are delivered by a delivery catheter which is repositioned to spaced-apart delivery sights. By coating the stents with particular biologically active substances, hyperplasia within and between the implanted stents can be inhibited. An exemplary delivery catheter comprises a catheter body having both a pusher rod for advancing the stents relative to a sheath and a reciprocatable delivery catheter for implanting the stents. | 09-25-2008 |
20080234795 | DEVICES AND METHODS FOR CONTROLLING EXPANDABLE PROSTHESES DURING DEPLOYMENT - A catheter for delivering a prosthesis to a treatment site in a body lumen comprises an elongate flexible member and a sheath slidably disposed thereover. A plurality of self-expanding tubular prostheses are carried in axially spaced apart locations along the elongate member, within the sheath. The prostheses may be selectively interlocked with one another and are constrained by the sheath in a radially contracted configuration. The prostheses are separately releasable from the sheath when the sheath is retracted relative to the elongate member. The catheter also has a pusher member slidably disposed along the elongate member within the sheath. The pusher is adapted to move past the prostheses in a first direction without displacing the prostheses, while in a second direction the pusher engages a selected prosthesis so as to move the prosthesis with the pusher to interlock the selected prosthesis with a second prosthesis. | 09-25-2008 |
20080208318 | MULTIPLE INDEPENDENT NESTED STENT STRUCTURES AND METHODS FOR THEIR PREPARATION AND DEPLOYMENT - Blood vessels and other body lumens are stented using stent structures comprising a plurality of radially expansible rings where at least some of the rings comprise axially extending elements which interleave with axially extending elements on adjacent unconnected rings. The ring structures may be open cell structures or closed cell structures, and the axially extending elements will typically be formed as part of the open cell or closed cell structure. | 08-28-2008 |
20080208311 | MULTIPLE INDEPENDENT NESTED STENT STRUCTURES AND METHODS FOR THEIR PREPARATION AND DEPLOYMENT - Blood vessels and other body lumens are stented using stent structures comprising a plurality of radially expansible rings where at least some of the rings comprise axially extending elements which interleave with axially extending elements on adjacent unconnected rings. The ring structures may be open cell structures or closed cell structures, and the axially extending elements will typically be formed as part of the open cell or closed cell structure. | 08-28-2008 |
20080199510 | THERMO-MECHANICALLY CONTROLLED IMPLANTS AND METHODS OF USE - An implant comprises a structure that may be implanted into tissue and that has a first material property at normal body temperature. The first material property is variable at elevated temperatures above normal body temperature. The implant also has a plurality of particles dispersed in the structure that are adapted to convert incident radiation into heat energy when irradiated with electromagnetic radiation. The particles are in thermal contact with the structure such that exposure of the particles to incident radiation raises the temperature of the structure thereby changing the first material property relative to the first material property at normal body temperature. | 08-21-2008 |