49results about "Venous valves" patented technology

A stent including a tubular body formed of one or more interwoven wires, a first anchor member disposed adjacent the first open end of the stent, a second anchor member disposed adjacent the second open end of the stent, and at least one divider disposed between the first and second anchor members. The first and second anchor members and the divider extend radially outward from the tubular body to divide the tubular body into at least a first saddle region extending between the first anchor member and the divider and a second saddle region extending between the second anchor member and the divider.

An implantable prosthetic valve includes a radially collapsible and expandable annular frame having three commissure attachment posts and four rows of circumferential struts. The rows include a first row, a second row downstream of the first row, a third row downstream of the second row, and a fourth row downstream of the third row and defining an outflow end of the frame. Each row of circumferential struts includes angled struts arranged in a zig-zag pattern. A leaflet structure includes three leaflets forming three commissures, each commissure being connected to one of the commissure attachment posts only at locations along the commissure attachment posts between a first plane that is perpendicular to a longitudinal axis of the frame and intersects crowns of the third row of struts and a second plane that is perpendicular to the longitudinal axis and intersects crowns of the fourth row of struts.

A flow restrictor for a blood vessel can include a frame positionable within a blood vessel, an inner cell, a leaflet, and a lumen through the flow restrictor. The lumen is defined at least in part by the leaflet. An inflow edge of the leaflet can be coupled to a movable junction of the inner cell, and an outflow edge of the leaflet can be coupled to an anchoring junction of the inner cell. The movable junction of the inner cell and the inflow edge of the leaflet can be configured to move axially in response to a first increase in a blood pressure within the blood vessel, and in response to the blood pressure within the blood vessel being within a first blood pressure range. The movable junction and the leaflet can be configured such that the lumen changes size when the movable junction moves.

This invention relates to a valve prosthesis and a stent, the stent comprising a first stent. The first stent includes two first rod groups, and a first axial rod and a second axial rod connecting the two first rod groups and arranged along the axial direction of the stent. Each first rod group includes a plurality of first rods connected end-to-end and arranged in a W-shape. The first crests of the two first rod groups are arranged opposite each other, and the first troughs are arranged opposite each other. At least one or more of the two oppositely arranged first crests are connected by one or more first axial rods, and the two oppositely arranged first troughs are connected by one or more second axial rods. In this way, the arrangement density of the axial rods can be increased, thereby improving the radial support strength, so that it can be stably fixed at the location of the original valve; in addition, the enclosed quadrilateral structure can be easily bent under stress, that is, it will not affect the normal storage and folding of the stent.

This application generally relates to an transcatheter anti-reflux venous valve endoprosthesis system, including a replacement valve, a valve support frame, crimping system, and delivery system to treat patients with chronic venous insufficiency, and method for using such a system.

A flow restrictor for a blood vessel can include a frame positionable within a blood vessel, an inner cell, a leaflet, and a lumen through the flow restrictor. The lumen is defined at least in part by the leaflet. An inflow edge of the leaflet can be coupled to a movable junction of the inner cell, and an outflow edge of the leaflet can be coupled to an anchoring junction of the inner cell. The movable junction of the inner cell and the inflow edge of the leaflet can be configured to move axially in response to a first increase in a blood pressure within the blood vessel, and in response to the blood pressure within the blood vessel being within a first blood pressure range. The movable junction and the leaflet can be configured such that the lumen changes size when the movable junction moves.

Medical systems, devices and methods for creation of autologous tissue valves within a mammalian body are disclosed. One example of a device for creating a valve flap from a vessel wall includes an elongate tubular structure having a proximal portion and a distal portion and a longitudinal axis; a first lumen having a first exit port located on the distal portion of the elongate tubular structure; a second lumen having a second exit port located on the distal portion of the elongate tubular structure; a recessed distal surface on the distal portion of the elongate tubular structure, wherein the recessed distal surface is located distally to the first exit port; and an open trough on the recessed distal surface extending longitudinally from the first exit port.

An apparatus for crimping expandable prosthetic heart valves, the apparatus comprising jaws having a linear movement towards a centre, a stationary base including guidance slits facing the centre, and a rotating mechanical member rotating around the centre, the member including a spiral track, and three removable accessories consisting of: a handle level stop member 108 removably attached to the valve crimping device within an aperture formed in the housing 2, the handle stop member 108 calibrated to stop movement of the handle 5 when the proper aperture size is reached for a particular crimping operation; a crimped valve gauge 112 removably mounted on the base 4 and providing a tube 116 having a tapered throughbore with a minimum diameter that is equal to the minimum aperture diameter as limited by the stop member 108; and a balloon gauge removably mounted on the base 4 having an inner diameter calibrated to the desired maximum size of the expanding balloon used to deliver the prosthetic valve.

Devices, systems, and / or methods can treat aneurysms and / or other conditions, while providing compliance characteristics to fluid vessels. Examples of the present disclosure can include an implant device that includes a tubular structure with multiple first sections that deflect radially inward and that are separated by multiple second sections. The second sections can include lobes. The first sections can be configured to deflect radially outward based on radial / luminal pressure within a fluid vessel to provide a change in volume for the implant device.

A nested valve conduit comprises an outer conduit, a conduit support on the inner wall of the outer conduit, and a valve leaf set arranged on the conduit support, wherein 3-5 main ribs extend from the center of the root of the valve leaf to the edge of the valve leaf, secondary branch ribs are distributed between the main ribs, and the main ribs and the secondary branch ribs constitute a mesh-shaped supporting reinforcing rib; the reinforcing rib is embedded in the interior of the valve leaf and integrally formed with the valve leaf; the root of the reinforcing rib extends to the attachment area of the valve leaf and the conduit support, forming a T-shaped anchoring structure; an annular groove is designed near the edge of the root of the valve leaf of the conduit support; the T-shaped anchoring structure of the reinforcing rib is embedded in the groove of the conduit support, and the gap between the valve leaf and the conduit support is filled with biological glue; and the conduit support and the outer conduit are combined and fixed through physical and chemical methods. The present application reduces the risk of valve leaf shedding, prolongs the fatigue life, and reduces the risk of regurgitation and thrombosis; the nested design of the outer conduit and the conduit support reduces the connection difficulty between the valve leaf and the outer conduit, facilitating the realization of 3D complex design and mass production of the valve leaf.

This disclosure provides a tissue-engineered transcatheter vein valve and methods of making such a tissue-engineered transcatheter vein valve. Methods of making the valve include casting or molding a polymer into a tubular structure having a first end and a second end, where the first end of the tubular structure is cast or molded around a tubular support structure and where the second end of the tubular structure is cast or molded in the absence of the support structure; everting the polymer at the second end through the support structure; anchoring the second end of the tubular structure to the support structure at a first position and a second position, where the anchored first position and the anchored second position result in commissures, forming leaflets therebetween.

Various systems, devices, components and methods are disclosed for controllably and selectively occluding, restricting, and / or diverting flow within a patient's vasculature. The flow restriction systems can include an implant having a flow restrictor and an implantable controller having an actuator for actuating the flow restrictor. The flow restriction systems can also include an external device for controlling operation of the implant via the implantable controller.

The present disclosure relates to a stent device for forming a fistula between two vessels of a subjects vascular system, said stent comprising a stent body including: a fluid passageway between a first end opening and a second end opening; at least one fistula opening configured to allow blood flow between two vessels of a subjects vascular system; and an occlusion device configured to selectively close at least one of the first end opening or the second end opening.

A device (14) for delivering prosthetic valve (12) such as a prosthetic heart valve at a desired position for deployment. The invention includes extendable positioning elements (34, 36), which provide tactile feedback to a user to confirm proper positioning of the catheter with respect to the native valve annulus. During delivery, the extendable positioning elements lie against the catheter, over the prosthetic valve and expandable balloon, providing a low profile for advancing the catheter to the desired treatment location via small passages such as body lumens. Prior to valve deployment, the positioning elements are extended and brought into contact with tissue of the native annulus to confirm the proper positioning of the delivery system and prosthetic valve.

A cardiac implant device comprises a frame configured for placement at least partially within a blood vessel of a heart, a skirt configured to at least partially enclose the frame, and two or more arms extending from a distal end of the frame.

A self-expanding or otherwise expandable artificial valve prostheses for deployment within a body passageway, such as a vessel or duct of a patient. The valve prostheses include a support structure having an outer frame, a supporting member and a valve leaflet. The portion of the valve leaflet is supported by the supporting member and is positioned away from the wall of the body passageway when the device is deployed within the body passageway.

The present disclosure relates to a system for closing a valve of a vessel or a vessel in a patient's vascular system, said system comprising: a delivery tool for delivering a closing device, and comprising a delivery catheter with a lumen configured to receive at least a portion of the valve therein; and a closing device configured to be coupled to said at least a portion of the valve so as to close the valve.

The invention relates to a medical implant (1) such as an implantable valve. The medical implant (1) comprises a main body (2) and a leaflet assembly (5). The leaflet assembly (5) is formed separate from the main body (2) and is attachable or attached thereto.

This disclosure provides a tissue-engineered transcatheter vein valve and methods of making such a tissue-engineered transcatheter vein valve.

Apparatus for progressively dilating the lumen of a narrow natural vessel (60) such as an iliac artery and implanting a tubular device (240) enabling access through the dilated lumen to conduct subsequent procedures via the dilated lumen, includes an inflatable integrated balloon (245) locatable at least partially within the tubular device, the tubular device (240) having a length L1 providing a self-expanding tubular body having at least a portion (250) including stents (244), so that when the integrated balloon (245) is removed the dilated lumen of the natural vessel (60) remains dilated and supported by the tubular device (240).

An implantable prosthetic valve (10), according to one embodiment, comprises a frame (12), a leaflet structure (14), and a skirt member (16). The frame can have a plurality of axial struts (20) interconnected by a plurality of circumferential struts (22, 24). The leaflet structure comprises a plurality of leaflets (e.g., three leaflets arrange to form a tricuspid valve). The leaflet structure has a scalloped lower edge portion secured to the frame. The skirt member can be disposed between the leaflet structure and the frame.

Described here are wireless monitoring devices, systems, and methods for estimating one or more physiological parameters of a patient. These devices and systems may measure or receive a signal waveform transmitted through one or more of fluid and a physiological structure of a patient. This measured signal waveform may be processed to generate waveform parameter data used to estimate a physiological parameter such as blood velocity, heart wall thickness, and the like.

Systems, devices, and methods for the treatment of varicocele and related conditions are described. In some embodiments, the systems, devices, and methods described herein can include forming one or more fluid connections or fistulas between a blood vessel, such as a gonadal vein (e.g., testicular vein, ovarian vein), and a surrounding vein. In some embodiments, the systems, devices, and methods described herein can include occluding one or more blood vessels, such as a gonadal vein (e.g., testicular vein, ovarian vein). In some embodiments, the systems, devices, and methods described herein relate to flow diverters, replacement valves, and the like, for the treatment of, for example, varicocele and related conditions.

An implantable prosthetic valve (10), according to one embodiment, comprises a frame (12), a leaflet structure (14), and a skirt member (16). The frame can have a plurality of axial struts (20) interconnected by a plurality of circumferential struts (22, 24). The leaflet structure comprises a plurality of leaflets (e.g., three leaflets arrange to form a tricuspid valve). The leaflet structure has a scalloped lower edge portion secured to the frame. The skirt member can be disposed between the leaflet structure and the frame.

Fixation device for fixation of leaflets of a heart valve includes a central assembly and at least one arm moveably coupled to the central assembly. The at least one arm includes a body portion having a first end and a second end and a longitudinal axis defined therebetween, the second end being moveable between a closed position and an open position, the body portion having opposing body lateral sides, each body lateral side extending between the first end and the second end, the body portion having a body portion width defined between the opposing body lateral sides. The at least one arm further includes first and second nondeformable wing extensions, each wing extension extending laterally from a respective lateral side, each wing extension having a lateral outer edge, wherein a maximum arm width is defined between the outer lateral edge of the first wing extension and the outer lateral edge of the second wing extension. The fixation device further includes at least one gripping element moveable relative to the at least one arm to capture a native leaflet therebetween.

Described here are devices, systems, and methods for improving blood flow in a vessel. Generally, the method may comprise advancing a catheter into a first vessel proximal to an occlusion in the first vessel and forming a fistula between the first vessel and a second vessel. This may deliver blood flow around an occlusion to ischemic tissues located in the peripheral vasculature.

The invention provides devices, systems and methods for tissue approximation and repair at treatment sites. The devices, systems and methods of the invention will find use in a variety of therapeutic procedures, including endovascular, minimally-invasive, and open surgical procedures, and can be used in various anatomical regions, including the abdomen, thorax, cardiovascular system, heart, intestinal tract, stomach, urinary tract, bladder, lung, and other organs, vessels, and tissues. The invention is particularly useful in those procedures requiring minimally-invasive or endovascular access to remote tissue locations, where the instruments utilized must negotiate long, narrow, and tortuous pathways to the treatment site.; In addition, many of the devices and systems of the invention are adapted to be reversible and removable from the patient at any point without interference with or trauma to internal tissues.