60 results about "Venous valve" patented technology

A clip for immobilizing leaflets of a cardiac or venous valve includes a hub having a pair of tangle resistant spring-biased outer arms coupled to an inferior end of the hub and a pair of tangle resistant spring-biased inner arms adjacent to the outer arms and coupled to a superior end of the hub. A delivery catheter may be used to position the valve clip adjacent a target valve while the outer and inner arms are biased in an opened position relative to each other. After the valve leaflets are located between the opened outer and inner arms, the biasing forces may be released to allow the clip to self-close the clip over the valve leaflets.

An implantable valve having a valve element or leaflet and a base that is attachable to a vessel wall using a connector such as a screw, pin or a staple. The valve can be implanted using a catheter to position the valve in a desired location and drive the connector into the vessel wall. The valve can be used as a venous valve to control blood flow within the veins, arteries, heart or the aorta of a patient.

A venous valve with a frame and a cover on the frame for unidirectional flow of a liquid through the valve.

A venous valve-with a structural member and valve leaflets that provide a sinus.

A venous valve prosthesis includes a hollow conduit (40) defining a central passageway through which blood may flow. Opposing, pliable leaflet members (30) are located within the conduit and move back and forth between a first, open position, whereby blood may flow through the central passageway in a first direction, and a second, closed position, whereby blood is prevented from backflowing through the central passageway in a second direction which is opposite the first direction. A hollow and generally cylindrical support member (10, 20) retains the leaflet members and is coaxially disposed within the conduit. The support member includes opposing cutaway regions (18) defining two axially extending struts (16) supporting the leaflet members. The cutaway regions, in cooperation with the struts, allow the leaflet members to collapse inwardly to the closed position.

A venous valve with a frame and a cover on the frame for unidirectional flow of a liquid through the valve.

Percutaneous methods and apparatus for forming a venous valve from autologous tissue by creating at least one subintimal longitudinal dissection that forms at least one flap of intimal tissue are disclosed. In one method, a balloon catheter having a dissecting blade mounted thereon is delivered to a target site where a new venous valve is to be created. The balloon is inflated to deploy the blade against the vein wall, and the catheter is longitudinally translated such that the blade dissects a subintimal layer of the vein wall. The balloon is subsequently deflated such that the blade pulls a flap of the dissected tissue towards the vein lumen, thereby creating a leaflet and corresponding pocket / sinus in the vein that collectively act as a monocuspid venous valve. Methods of forming new bicuspid and tricuspid venous valves utilizing two or three dissecting blades mounted on the balloon are also disclosed.

The present invention relates to an exterior support which can be implanted into periphery of venous blood vessel along its length and is used for restoring shell valve function of venous blood vessel. It includes front and rear arcuate frame external shells on a thin-long material, the rear frame external shell includes two branches of sharp-pointed thin-long material, every frame external shell includes the correspondent drawing side with longitudinal straight-line side branch-drawing device, and two frame external shells are mutually parallelly arranged. Said invention also provides the concrete application method of said exterior support for restoring function of venous valve by drawing mutually combined wall of venous valve.

A bioprosthetic valve for repairing a deep venous insufficiency in a subject includes a single leaflet from a xenogeneic heart valve attached at natural margins of attachment to a patch of valve wall tissue. The patch may extend axially above and below the leaflet and circumferentially on either side of the leaflet to provide a region for attaching the patch to a fenestration in a host vein. A bioprosthetic valve may be manufactured by excising a portion of a xenogeneic heart valve including a single leaflet and contiguous wall tissue, and may further comprise shaving off excess leaflet tissue from adjacent leaflets. A method of replacing a malfunctioning venous valve in a subject includes providing a bioprosthetic valve as described above and inserting it to the host vein.

The invention provides prosthetic venous valves, and method of use thereof, for the effective treatment of individuals with venous reflux in chronic venous insufficiency (CVI). The development of such prosthetic venous valves in the areas of valve design, design specifications, verification and / or validation testing, computational analysis, valve placement and clinician guidance and procedure are provided. Manufacturing the prosthetic venous valves of the invention is also provided.

Methods and systems for improving the competency of a venous valve wherein one or more compressor(s) (e.g., space occupying material(s) or implantable device(s)) is / are delivered to one or more location(s) adjacent to a venous valve to compress the venous valve in a manner that causes one or both leaflets of the valve to move toward the other, thereby improving closure or coaptation of the valve leaflets. The compressor(s) may be delivered by an open surgical approach, by a direct percutaneous approach or by a transluminal catheter-based approach.

Endovascular prostheses are disclosed that are configured to repair a native venous valve having improper or non-existent valve leaflet coaptation caused by vessel weakness and / or distention. The prostheses are configured to be implanted in the venous system immediately downstream of the malfunctioning valve and act as repair devices to restore proper function to the venous valve by reconfiguring and supporting the valve leaflets and thereby improving their coaptation.

The invention relates to a thrombus treatment platform. The thrombus treatment platform comprises a suction catheter with a suction channel, a suction pump communicated with the near end of the suction catheter, a stirring device and a filter screen assembly, and the filter screen assembly comprises a filter rod and a filter screen; the stirring device comprises a first catheter, a second catheter slidably arranged outside the first catheter in a sleeving mode, a stirrer arranged at the far end of the first catheter and having an open state and a closed state, and an operating device arranged between the first catheter and the second catheter and capable of relatively sliding the first catheter and the second catheter so as to enable the stirrer to be switched between the open state and the closed state; and the thrombus treatment platform further comprises a driving device which is connected with the first catheter or the second catheter and can drive the stirrer to rotate. The thrombus treatment platform can remove thrombus while ensuring relative safety, and is especially suitable for removing a large number of thrombus in inferior vena cava, protecting venous valve and venous vessel wall, has controllable blood loss and simple operation steps, shortens operation time and reduces hospitalization cost of patients.