37results about "Ball valves" patented technology

A venous valve prosthesis having a substantially non-expandable, valve portion comprising a valve-closing mechanism, such as a pair of opposing leaflets; and an anchoring portion, such as one or more self-expanding frames or stents that are expandable to anchor the prosthesis at the implantation site. In one embodiment, the rigid valve portion includes a deposition of material such as pyrolitic carbon to reduce the thrombogenecity of the blood-contacting surfaces. The anchoring portions preferably include a covering, such as a tubular construct of synthetic or collagen-derived material (such as a bioremodelable ECM material), which attaches about the support structure such that blood flow is directed through the valve mechanism as it transitions from the larger diameter anchoring portion to the intermediate, smaller-diameter portion of the prosthesis. In another embodiment, the valve support housing and valve-closing elements are delivered in a collapsed, folded, and/or dissembled state sized for delivery, then manipulated in situ to the second expanded configured following deployment.

The present invention relates to devices and methods for improving the function of a defective heart valve, and particularly for reducing regurgitation through an atrioventricular heart valve—i.e., the mitral valve and the tricuspid valve. For a tricuspid repair, the device includes an anchor deployed in the tissue of the right ventricle, in an orifice opening to the right atrium, or anchored to the tricuspid valve. A flexible anchor rail connects to the anchor and a coaptation element on a catheter rides over the anchor rail. The catheter attaches to the proximal end of the coaptation element, and a locking mechanism fixes the position of the coaptation element relative to the anchor rail. Finally, there is a proximal anchoring feature to fix the proximal end of the coaptation catheter subcutaneously adjacent the subclavian vein. The coaptation element includes an inert covering and helps reduce regurgitation through contact with the valve leaflets.

The present invention relates to devices and methods for improving the function of a defective heart valve, and particularly for reducing regurgitation through an atrioventricular heart valve—i.e., the mitral valve and the tricuspid valve. For a tricuspid repair, the device includes an anchor deployed in the tissue of the right ventricle, in an orifice opening to the right atrium, or anchored to the tricuspid valve. A flexible anchor rail connects to the anchor and a coaptation element on a catheter rides over the anchor rail. The catheter attaches to the proximal end of the coaptation element, and a locking mechanism fixes the position of the coaptation element relative to the anchor rail. Finally, there is a proximal anchoring feature to fix the proximal end of the coaptation catheter subcutaneously adjacent the subclavian vein. The coaptation element includes an inert covering and helps reduce regurgitation through contact with the valve leaflets.

The invention provides a catheter for insertion into a biological passage which contains a first flowing fluid, the catheter including a tubular member having a proximal end and a distal end; a fluid delivery lumen contained within the tubular member; an inflatable balloon assembly disposed at the distal end of the tubular member, the balloon assembly including an inflatable balloon member having an uninflated state and an inflated state, the balloon assembly including apertures in communication with the fluid delivery lumen; an inflation lumen in communication with the balloon member; and a valve contained within the inflatable balloon assembly. The inflatable balloon is assembly configured such that when the balloon member is in the inflated state: (i) sections of the balloon member contact the biological passage defining at least one containment pocket; (ii) the apertures are disposed in the containment pocket, (iii) a flow lumen is defined through the balloon member to allow the first fluid to flow through the balloon member; and (iv) the valve functions to allow the first flowing fluid to flow through the flow lumen in a physiologic direction, while blocking backflow of the first fluid through the flow lumen.

Intravascular devices are delivered to the aorta percutaneously via the femoral artery. The devices are anchored within the vasculature in the region of the renal artery ostia. These embodiments function to increase the flow of blood from the aorta to the renal arteries, thus delivering a higher relative percentage of the blood flowing through the aorta to the kidneys. The elevation in blood low to the kidneys improves the natural removal of excess fluids from the body. In one embodiment, the device is a diverter element positionable upstream of the renal artery ostia. In another embodiment, the device is a flow restrictor positionable downstream of the ostia to cause an elevation is pressure upstream of the ostia.

Systems and methods for controlling blood pressure by controlling atrial pressure and atrial stretch are disclosed. In some embodiments, a stimulation circuit may be configured to deliver a stimulation pulse to at least one cardiac chamber of a heart of a patient, and at least one controller may be configured to execute delivery of one or more stimulation patterns of stimulation pulses to the at least one cardiac chamber, wherein at least one of the stimulation pulses stimulates the heart such that an atrial pressure resulting from atrial contraction of an atrium overlaps in time a passive pressure build-up of the atrium.

A valve that includes an expandable valve body defining a lumen and a longitudinally moveable obstructer retained within the lumen of the valve body between the proximal and distal ends of the valve when the valve is in an expanded configuration. The valve, in the collapsed configuration, is delivered to a native valve site by a catheter where the valve body is expanded to anchor the valve at the valve annulus and the collapsed obstructer is subsequently expanded so that the valve is in the expanded configuration.

The invention relates to a heart valve regurgitation drum and optional closure disk and/or tubular stent to manage and provide levels of intentional regurgitation within an orthogonally delivered transcatheter prosthetic heart valve having a first inner flow control component/valve, a second inner regurgitation control component, and an outer annular support frame having compressible wire cells that facilitate folding flat along the z-axis and compressing the valve vertically along the y-axis, or orthogonally to the central axis of the flow control component, allowing a very large diameter valve to be delivered and deployed to the tricuspid valve from the inferior vena cava or superior vena cava, or trans-atrially to the mitral valve, the valve having a height of about 5-60 mm and a diameter of about 25-80 mm, without requiring an oversized diameter catheter and without requiring delivery and deployment from a catheter at an acute angle of approach.

A valve prosthetic implant for treating a vein or other blood vessel includes a tubular, expandable anchoring frame extending from a proximal end to a distal end of the implant, a valve seat formed at or near the middle of the anchoring frame, an expandable ball disposed within the lumen of the anchoring frame, and a ball retention tether attached to the expandable ball and to the valve seat and/or the anchoring frame. The anchoring frame may include a cylindrical proximal portion at the proximal end, a cylindrical distal portion at the distal end, an inwardly angled inlet portion between the cylindrical proximal portion and a middle of the anchoring frame, and an inwardly angled outlet portion between the cylindrical distal portion and the middle of the anchoring frame.

The present invention relates to an implantable device 10; 100; 200; 300 for treating heart valve regurgitation, the device 10; 100; 200; 300 being configured to expand from a compressed state into an expanded state. The device according to the invention comprises a stent element 11 consisting of (i) an atrial anchoring stent- portion 12, and (ii) a valve-carrying stent-portion 14 being fixedly connected with one another, and a valve-element 18. The atrial anchoring stent- portion 12 has a balloon-like shape 13 and the valve-carrying stent-portion 14 has a cylindrical shape 15, such, that the valve-carrying stent-portion 14 is positioned intra-annular without contacting the annulus 70 of a native heart valve 66.

The invention provides a liquid injection type cage ball aortic valve support system and belongs to the technical field of medical instruments. The liquid injection type cage ball aortic valve support system comprises a support body and a liquid injection ball. The system is delivered to the position of the aortic valve of a patient through a catheter after passing through the artery or the cardiac apex of the human body, so that the lesion aortic valve is substituted, and the system controls the blood to flow from the left ventricle to the artery blood vessel in one direction. The support body is divided into four sections which are the valve ring anchoring section, the ball cage section, the transitional section and the aorta anchoring section in sequence. The liquid injection ball moves in the ball cage section of the support body in a reciprocating mode, so that the function of blood one-way flow control is achieved. The liquid injection type cage ball aortic valve support system has the advantages that the system can be implanted into the human body through the catheter and circumferential leakage can be reduced in the valve closing process; the liquid injection ball is adopted in a valve support so that the function of blood one-way flow control can be achieved and the center backflow phenomenon generated when valve leaflets are folded can be eliminated; the force receiving state of the liquid injection ball is better than that of a triple lobe type valve and the service life can be prolonged.

The invention relates to an interventional aortic valve stent system with an inflating type ball bag. The interventional aortic valve stent system with the inflating type ball bag comprises a flexiblecylindrical aortic valve stent, a ring-shaped valve ring and the ball bag; the aortic valve stent is anchored on the inner wall of an aorta; the valve ring is arranged in the aortic valve stent, thecenter line of the valve ring and the center line of the aortic valve stent are superposed, and the outer wall of the valve ring is connected and fixed to the inner wall of the aortic valve stent; theend, which is away from the aortic valve, of the valve ring is connected with an elastic ball cage, and the ball bag is arranged in the ball cage; and under the effect of blood pressure difference, and the ball bag moves between the top of the ball cage and the valve ring until part of the ball bag extends into the valve ring and is attached to the inner wall of the valve ring or the ball bag moves towards the top of the ball cage and away from the valve ring. The interventional aortic valve stent system with the inflating type ball bag has the advantages that the ball bag replaces a traditional valve leaflet, disassembling and changing are facilitated, compared with a biological tissue valve leaflet, the ball bag does not have the 'chronic disease' of dysfunction of the valve, the risk of secondary surgical valve change of a patient is reduced, and the surgical safety is high.

The invention discloses a valve prosthesis and a valve prosthesis system. The valve prosthesis comprises a valve stent, the valve stent comprises an outer stent and an inner stent, the outer stent and the inner stent are connected and located on the periphery of the inner stent, the outer stent comprises: an atrium matching part, wherein the atrium matching part comprises a plurality of first support rods, the plurality of first support rods are distributed in the circumferential direction and connected in sequence, and each first support rod is provided with a movable end; a valve leaflet which is fixed on the inner stent; a skirt edge which covers the inner surface and/or the outer surface of the valve stent; connectors which are arranged at the movable ends of the first support rods and allow the first support rods to move between the contraction position and the expansion position. The connectors are arranged at the movable ends of the first support rods, so that the first support rods can move between the contraction positions and the expansion positions, and the first support rods can be smoothly expanded or contracted.

The invention provides an anchoring device of a heart valve prosthesis and a heart valve prosthesis system.The heart valve prosthesis system comprises the anchoring device and the heart valve prosthesis, the anchoring device comprises an anchoring section and a supporting section which are axially connected with each other, and the anchoring section is provided with an annular first cavity capable of containing the heart valve prosthesis; the supporting section is arranged on one side of the anchoring section in the axial direction, the supporting section comprises at least two elastic wires which are sequentially arranged in the circumferential direction of the anchoring section, one end of each elastic wire is connected with the anchoring section, and the other end of each elastic wire extends in the direction away from the anchoring section. According to the anchoring device, anchoring of the heart valve prosthesis can be achieved through the structure of the preset cavity, the anchoring device does not need to cross an original valve ring in the implanting process, and then perivalvular leakage can be effectively prevented after the heart valve prosthesis is implanted.