7820results about "Stents" patented technology

Loading systems for prosthetic heart valve devices are disclosed. A loading funnel is provided within a watertight interior space that is at least partially filled or fillable with biocompatible fluid. Funnel may have a cylindrical end to which is connected a delivery catheter having a lumen that will receive the collapsed prosthetic heart valve device. An expanded prosthetic heart valve device may be placed within the funnel and pushed or pulled into the funnel which provides a predictable, reliable and repeatable surface for collapsing the prosthetic heart valve device. Ultimately the prosthetic heart valve device is collapsed and translated into the lumen of the delivery catheter for further translation therealong and release into the heart chamber of interest.

Devices are provided with an internal dimension that can be reduced and increased in vivo. In one example, an interatrial shunt for placement at an atrial septum of a patient's heart includes a body. The body includes first and second regions coupled in fluid communication by a neck region. The body includes a shape-memory material. The body defines a passageway through the neck region for blood to flow between a first atrium and a second atrium. The first and second regions are superelastic at body temperature, and the neck region is malleable at body temperature. A flow area of the passageway through the neck region may be adjusted in vivo.

Devices are provided with an internal dimension that can be reduced and increased in vivo. In one example, an interatrial shunt for placement at an atrial septum of a patient's heart includes a body. The body includes first and second regions coupled in fluid communication by a neck region. The body includes a shape-memory material. The body defines a passageway through the neck region for blood to flow between a first atrium and a second atrium. The first and second regions are superelastic at body temperature, and the neck region is malleable at body temperature. A flow area of the passageway through the neck region may be adjusted in vivo.

The invention discloses a windowing covered stent blood vessel and a delivery system, and belongs to the field of medical instruments, the windowing covered stent blood vessel comprises a covered stent blood vessel main body and a windowing assembly arranged on the covered stent blood vessel main body; wherein the windowing assembly at least comprises a barrel-shaped structural part and a connecting part, and the barrel-shaped structural part is provided with a channel matched with the branch support; the connecting piece is used for connecting the cylindrical structural piece and the covered stent blood vessel main body; the connecting piece is provided with a buffer part, so that the cylindrical structural piece is flexibly connected with the covered stent blood vessel main body; according to the windowing assembly, blocking of the branch support can be effectively avoided, and good wall attaching performance can be provided for the embedded branch support through the buffering part.

An asymmetric device for regulating blood volume distribution across a patient's atrial septum having a first expandable end region and a second expandable end region. The first expandable end region is transitionable from a contracted delivery state to an expanded deployed state in which the first expandable end region extends into the patient's left atrium and an inlet end of the first expandable end region is in a first plane. The second expandable end region is transitionable from a contracted delivery state to an expanded deployed state in which the second expandable end region extends into the patient's right atrium and an outlet end of the second expandable end region is in a second plane, such that the first plane intersects the second plane. The device further includes a neck region joining the first expandable end region to the second expandable end region, wherein the neck region is sized and shaped for placement in the patient's atrial septum.

An intra-vessel transcatheter filter device (1) designed to capture and remove emboli, thus preventing distal embolization, comprising: • a tubular filter (2) comprising a flexible porous material and defined by a distal element and a proximal element, namely a main body (3) and a funnel (4); i. said main body (3) having a length adapted to extend within a suitable vessel zone; said main body (3) comprising: a) a distal end (5) that is adapted to be radially coupled with said zone and hermetically sealed to it when the device is in an active configuration, said distal end (5) being provided of selectively actionable closure means so that said distal end is designed to be open when the device is in an active configuration and closed before the device retraction, b) a proximal end (6); ii. said funnel (4) forming an extension of said main body (3), with the funnel base located at said proximal end (6). • a support structure assembly (8) comprising: i. a supporting catheter (11) extending within said main body (3), ii. one radially expandable distal structure (9) fixed to said distal end (5), iii. one radially expandable proximal structure (10) positioned in correspondence of said proximal end (6), said distal structure (9) and said proximal structure (10) being fixed at least in an end to said supporting catheter (11).

Delivery systems for placing an implantable cardiac device at a native comprising a delivery catheter and an attachment assembly. The delivery catheter can include a proximal portion and a distal portion, and the attachment assembly can be at the distal portion of the delivery catheter. The attachment assembly can include arm pairs in which individual arm pairs include a first arm with connector and a second arm with a retainer. Each first arm extends along a corresponding second arm, and the first arm and / or the second arm in each arm pair moves relative to the other from a locked position to a released position. In the locked position, the retainer interfaces with the connector to maintain engagement between the implantable device and the connector. In the released position, the retainer is positioned relative to the connector such that the implantable device can disengage the connector.

Balloon catheters, sleeves, cages, cylindrical structures and endoluminal prostheses are provided with stress-applying and spacing features coupled to expandable surfaces thereof. At least one or at least some stress-applying features are immobilized onto the surface or into pre-formed indentations formed in the expandable surface. The stress-applying and spacing features may have blunt and / or rounded contact regions which contact tissue or calcified regions in the vasculature. The contact regions dent or fracture occlusive material on the wall of a vascular lumen and / or patient valve leaflets when expanded. The spacing of features can permit blood, drug, and contrast perfusion past structures expanded in the vasculature, particularly balloon catheters.

The invention relates to a covered stent, a stent system and a manufacturing method of the stent system.The covered stent comprises a main stent body, a covering film and binding wires, the main stent body comprises a main corrugated ring and a main covering film, the main corrugated ring is covered with the main covering film, the binding wires comprise the first binding wire, and the covering film and the main stent body are connected to one side of the main stent body through the first binding wire; the covered stent further comprises a first positioning piece and a second positioning piece, the first positioning piece is arranged at the proximal end of the main stent, the second positioning piece is arranged at the proximal end of the envelope, and when the covered stent is in a natural expansion state, when the envelope is naturally attached to the main stent in the circumferential direction, the envelope is located at the proximal end of the main stent. The first positioning piece and the second positioning piece are roughly located on the same radial line. According to the covered stent provided by the invention, a second fixed connection point of the envelope of the covered stent and the main stent can be determined, and the envelope is prevented from being fixed to the circumferential opposite side of the target position of the main stent, so that the problem of release of the proximal end of the main stent is avoided.

The invention discloses a human body intravascular positioning support, and relates to the field of medical instruments. Comprising a metal wire support which is used for expanding in a blood vessel of a human body to dilate the blood vessel, a plurality of positioning units are arranged on the metal wire support, and each positioning unit comprises a spring and a penetrating type positioning head fixedly connected with the far end of the spring; the near end of the spring is fixedly connected with the metal wire support, and the penetrating type positioning head is used for penetrating into the inner wall of a blood vessel to achieve positioning when the metal wire support is unfolded. Through the design that the spring is combined with the positioning unit of the piercing type positioning head, the unification of stable fixing and safe taking-out of the intravascular positioning stent is achieved.

Delivery systems for implanting cardiac valve repair devices are disclosed herein. In some embodiments, a delivery system includes a delivery catheter, a hub shaft extending through the delivery catheter, and a core shaft extending through the hub shaft. The delivery catheter is configured to hold a valve repair device in a compressed configuration. The hub shaft includes a hub configured to releasably engage a first portion of the valve repair device, and the core shaft includes a plug configured to releasably engage a second portion of the valve repair device. When the valve repair device is unsheathed from the delivery catheter, the hub shaft and the core shaft are independently movable to axially elongate / compress the valve repair device. When the valve repair device is properly positioned, the hub can be actuated to release the first portion of the valve repair device, and the plug can be actuated to release the second portion of the valve repair device.

A heart valve prosthesis for replacing a diseased native valve in a patient. The valve prosthesis includes a compressible and expandable frame structure and an anchor connected to an outer periphery of the frame structure. The anchor comprises a helical wire having a free end. The valve may further include a valve segment mounted within the frame structure and expanded with the frame structure. The frame structure may be configured for receiving a valve segment.

A system for delivering a prosthetic heart valve may include, a handle, an outer catheter, an inner catheter, a nose cone coupled to the inner catheter, and an inflatable balloon having a proximal leg coupled to the outer catheter and a distal leg coupled to the nose cone or the inner catheter. A first valve retainer may be coupled to the inner catheter and positioned within the balloon. In an assembled state of the first valve retainer, an inner stop is directly fixed to the inner catheter and an outer stop is positioned around and coupled to the inner stop. The inner stop has a maximum outer diameter that is smaller than a maximum inner diameter of the distal leg. In the assembled condition of the first valve retainer, the outer stop has a maximum outer diameter that is larger than the maximum inner diameter of the distal leg.

A surgical anchor device for being anchored on the mucous membrane of the inner wall of the intestine, the device having a temporary anchor element presenting anchoring that can be modified in a controlled manner and having a first substantially cylindrical multiply-perforated wall presenting properties of radial elasticity whereby the first wall presents an outer diameter that can be varied in controlled manner, wherein a portion of the inner surface of the first wall is lined with an independent leakproof inner sheath having only its longitudinal ends fastened to the anchor element to define a suction chamber between the inner sheath and the first wall, the temporary anchor element being coupled to a flexible or semi-rigid tube extending outside the anchor element, an open end of the injection-suction tube opening out into the suction chamber enabling air to be injected into or sucked out from the suction chamber.

A delivery apparatus can include a handle, a first shaft extending from the handle and having a proximal end portion coupled to the handle and a distal end portion and a second shaft extending coaxially over the first shaft and having a proximal end portion coupled to the handle and a distal end portion. The delivery apparatus can further include a shoulder coupled to the distal end portion of the second shaft and having a flared end portion configured to abut a prosthetic valve positioned around the first shaft in a radially compressed state, an extension portion extending from the shoulder, and at least one radiopaque marker disposed on the extension portion at a location within the prosthetic valve when the prosthetic valve is in a radially compressed configuration on the first shaft.

Systems, apparatuses, and methods disclosed herein are provided for a motorized implant delivery system. The delivery system may utilize a processor for control of at least one motor for actuating a delivery apparatus. The delivery system may include sensors configured sense one or more of a condition of the patient's body or a condition of the delivery apparatus. The processor may process the signals provided by the sensors, which may comprise feedback signals to the processor.

The present disclosure relates to the technical field of medical devices, and in particular to catheter implant systems and included associated device, prosthetic heart valves and method. The interventional delivery system included includes a catheter assembly and a control handle connected to the catheter assembly, the catheter assembly has opposing distal and proximal ends and includes an inner sheath and an outer sheath slidably engaged with each other, the outer sheath includes a loading section and a sheath section in sequence from the distal end to the proximal end, the loading section is configured to enclose and keep the interventional device in a compressed state; the control handle includes a main handle and an auxiliary handle slidably fitted over the inner sheath, the proximal end of the inner sheath is connected to the main handle and the proximal end of the outer sheath is connected to the auxiliary handle.

The invention relates to a covered stent and a stent system.The covered stent comprises a main stent body and a wrapping piece, the main stent body comprises a main corrugated ring and a main covering film, the main corrugated ring is covered with the main covering film, the wrapping piece is connected with the main stent body through a binding wire, the main stent body comprises a binding piece, and the binding piece is connected with the main stent body through a connecting wire. The binding piece comprises a part of the main body wave ring or comprises a binding line, the binding piece extends along the main body covering film, the main body covering film comprises a first through hole and a second through hole, and the first through hole and the second through hole are formed in the two sides of the extending direction of the binding piece respectively; and the binding wire passes through the first through hole and the second through hole and crosses the binding piece. The binding wire of the covered stent provided by the invention crosses the binding piece when penetrating through the main body covering film, when the covered stent is loaded or released, although the covering film and the main body covering film are pulled and stressed by the binding wire, the binding wire mainly pulls the binding piece, and when the binding wire is stressed, the possibility that film holes of the first through hole and the second through hole are expanded can be reduced, so that internal leakage is prevented.

A catheter system can include a tubular body, and at least one of a targeting system coupled to the tubular body, an expandable member, or a fluid injection port. A method of identifying a bifurcation can include inserting a catheter system into a first vessel, positioning the catheter system at a first location, expanding an expandable member to occlude the first vessel, delivering contrast material so the contrast material pooling proximate to the expandable member, and reviewing a shape of the contrast material in the first vessel under fluoroscopy.

Medical appliances may be formed of multilayered constructs. The layers of the constructs may be configured with various physical properties or characteristics. The disposition and arrangement of each layer may be configured to create an overall construct with a combination of the individual properties of the layers. Constructs may be used to create vascular prostheses or other medical devices.

Delivery systems are used for medical devices. For example, this document describes delivery systems for implantable medical devices such as, but not limited to, prosthetic heart valves that are deliverable in a minimally invasive manner using a system of catheters. The delivery systems may include a valve stop member that establishes the longitudinal position of the prosthetic heart valve on a balloon member. Such a valve stop member can be constructed as a braided wire body or cellular body to provide multiple advantages.

Coaptation assist device for repairing cardiac valves and associated systems and methods are disclosed herein. A coaptation assist device configured in accordance with embodiments of the present technology can include, for example, a fixation member configured to press against cardiac tissue proximate to a native valve annulus, and a stationary coaptation structure extending away from the fixation member. The coaptation structure can include an anterior surface configured to coapt with a first native leaflet during systole and a posterior surface configured to displace at least a portion of a second native leaflet. The device also includes at least one sensor configured to detect parameters associated with at least one of cardiac function and device functionality. The sensors can be pressure sensors configured to detect left atrial pressure and / or left ventricular pressure.

Interatrial shunts having incorporated physiologic sensors are provided for monitoring and treating cardiovascular syndromes, including heart failure and pulmonary hypertension, in which the one or more sensors are affixed to the shunt to measure a physiologic parameter within the interatrial shunt. The one or more sensors may be directly affixed to or within a lumenal surface of the shunt or may be disposed on a support structure in a spaced relation to the shunt lumen, the one or more sensors disposed at locations subject to little or no pannus formation or cardiac wall motion artifact.

Delivery systems for placing an implantable cardiac device at a native comprising a delivery catheter and an attachment assembly. The delivery catheter can include a proximal portion and a distal portion, and the attachment assembly can be at the distal portion of the delivery catheter. The attachment assembly can include arm pairs in which individual arm pairs include a first arm with connector and a second arm with a retainer. Each first arm extends along a corresponding second arm, and the first arm and / or the second arm in each arm pair moves relative to the other from a locked position to a released position. In the locked position, the retainer interfaces with the connector to maintain engagement between the implantable device and the connector. In the released position, the retainer is positioned relative to the connector such that the implantable device can disengage the connector.

This disclosure relates to a catheter system for introducing a heart valve stent into the body of a patient. The catheter system includes a catheter tip having a seat portion for accommodating the stent in its collapsed state and a stent holder for releasably fixing the stent, wherein the seat portion is constituted by a first sleeve and a second sleeve, said sleeves being moveable relative to each other and relative to the stent holder, and a catheter shaft for connecting the catheter tip to a handle.

Apparatuses, systems, and methods for various devices, such as prosthetic valves. Some examples are directed to improvements in anchoring at a native heart valve, which may reduce possible trauma to a treatment or implantation site. Compliant and flexible anchoring features and methods are disclosed to reduce force upon a treatment or implantation site including heart tissue that surrounds leaflets of a mitral or tricuspid valve. Improved mechanisms for deployment of devices including motorized methods are also disclosed.

Delivery catheters for delivery of prosthetic heart valves are provided. The delivery catheters include brim recapture funnels configured for recapture of prosthetic heart valves. The brim recapture funnels are configured to recapture valve brims of partially deployed prosthetic heart valves to reduce or minimize damage to patient anatomy during a valve withdrawal procedure. Brim recapture funnels as described herein may be activated via suture control.

A medical appliance or prosthesis may comprise one or more layers of rotational spun nanofibers, including rotational spun polymers. The rotational spun material may comprise layers including layers of polytetrafluoroethylene (PTFE). Rotational spun nanofiber mats of certain porosities may permit tissue ingrowth into or attachment to the prosthesis. Additionally, one or more cuffs may be configured to allow tissue ingrowth to anchor the prosthesis.

The invention relates to a delivery device for delivering a self-expanding tubular implant and a system comprising the same. The conveying device comprises a pushing rod; at least one expandable body disposed at a distal end of the push rod, the expandable body configured to: axially elongate in a radially constrained contracted state; under the expansion state of releasing the constraint, radial expansion and axial contraction are realized; the elastic core wire is arranged in the expandable body in a penetrating mode and connected with the two ends of the expandable body, and the core wire is kept in a straight line shape in the natural state and the contraction state of the expandable body. The conveying device provided by the invention can be matched with a small-size micro catheter and can provide enhanced axial pushing force in the conveying process, so that the pushing efficiency and the operation stability of the tubular implant are improved; meanwhile, the radial expansion force provided by the expandable body can form effective auxiliary support for the implant, rapid wall attachment and stable expansion of the implant are promoted, and therefore the release effect of the implant is improved.