30 results about "Heart prosthesis" patented technology

The invention concerns an automated ancillary device (100) for inserting and fixing by means of clips an annular body (200), namely a prosthesis, on a annular resilient volume (23) including, coaxial about an axis (D), means for receiving and supporting (8) said body (200) coaxial to its axis, means for radially unfolding (500) about said axis (D) articulated supports (4) capable of bearing clips (21), the latter being capable of passing through both a thickness of material belonging to such a volume (23) and a thickness of material belonging to said body (200), under the action of means for longitudinally pushing (600) said supports (4) with respect to said means for receiving and supporting (8).

It includes means for gripping (300) material of the volume (23) capable of radially retracting said material. The means for radially unfolding (500) are capable of moving said clips (21) parallel to said axis (D).

A delivery system for rapid placement of heart implants is provided that includes a delivery platform. The delivery system includes a tubular catheter body, a piercing member, and a delivery platform. The tubular catheter body is sufficiently long and flexible to be advanced from a peripheral blood vessel access site to an atrium of the heart. The piercing member is configured to create a transapical channel from an internal apical portion of a ventricle to an outside heart wall. The delivery system includes an elongate tension member and an enlargeable member disposed on a distal portion of the elongate tension member. The enlargeable member is configured to be enlarged in a pericardial space of an intact chest wall to cover an area of the outside heart wall surrounding an opening of the transapical channel. When tensioned, the tension member provides a stable zone for positioning a heart implant within the heart.

A multi-chamber ventricular assist device (VAD) for blood pumping includes a rigid outer housing having an inlet and outlet, a pre-filling chamber disposed within the housing fluidly connected to the inlet, and an a ejection chamber disposed within the outer housing. A movable plate is flexibly secured to the housing and is in a flow path of the blood being disposed between the pre-filling and the ejection chamber. The movable plate has a one-way valve for flowing blood from said pre-filling chamber to the ejection chamber. An outlet valve is disposed between the ejection chamber and the outlet of the device. A structure is provided for moving the movable plate. The multi-chamber VAD is suitable as a heart prosthesis which can be implanted in the body or used externally.

An active implantable medical device such as a cardiac prosthesis for the treatment of a heart failure by controlled adjustment of the atrioventricular and interventricular delays. The device provides atrioventricular and/or biventricular stimulation, a sensor delivering at least one hemodynamic parameter correlated with time intervals representative of the succession of the systolic and diastolic phases, and circuits to adjust the AV delay and/or VV delay. The device determines (12) during one cardiac cycle several parameters such as the left ventricular pre-ejection interval LPEI, the left ventricular ejection time LVET, the diastolic filling time FT and the conduction time PR. The device compares (14, 18) these parameters with at least one predetermined criterion. If a condition is met, the device readjusts (16) the AV delay and/or VV delay to maximize the ventricular filling and ejection.

Percutaneous endovascular delivery of cardiac prosthetic devices is described through deep vascular access. Specifically, minimally intrusive access is achieved at points in the vascular tree having a size not usually achievable with existing tools. Localizing guide wires having visualization markings enable controlled passage through the vascular system.

The invention relates to a telescopic movable stent and an interventional heart prosthesis valve, the telescopic movable stent comprises an upper-layer stent, a lower-layer stent and a traction piece,and the upper-layer stent comprises an upper-layer stent wall and a plurality of straight sleeves; the lower-layer stent is movably arranged at the lower part of the upper-layer stent and comprises alower-layer stent wall, a plurality of straight rods and a plurality of connecting pieces; one end of the traction piece is connected with the straight rod, and the other end of the traction piece penetrates the straight sleeve, the upper-layer stent wall is in an inverted circular truncated cone shape; the plurality of straight sleeves are respectively arranged on the wall of the upper-layer stent; a concave linear slideway communicated with the outside is arranged in the straight sleeve; a plurality of grooves are formed in the inner wall of the linear slideway; extension lines of the plurality of straight sleeves are intersected at the same point of the axis of the upper-layer stent wall; the lower-layer stent wall is in an inverted circular truncated cone shape, the straight rods arearranged on the lower-layer stent wall corresponding to the straight sleeves respectively, the straight rods are provided with protruding strips, a plurality of buckles are arranged on the outer wallsof the protruding strips, and the lower-layer stent is connected with or separated from the lower-layer stent, so that the distance between the end of the upper-layer stent and claw lugs is changed.

A heart prosthesis system may include a prosthetic heart valve and a length of suture. The prosthetic heart valve may include a collapsible and expandable stent and a valve assembly mounted within the stent. The stent may have an aortic end, an annulus end, and a plurality of openings arranged circumferentially around the aortic end, the aortic end having a first diameter in an expanded condition. The length of suture may be threaded through the openings such that tension applied to the length of suture in a direction away from the stent may collapse the aortic end of the stent from the first diameter to a second diameter less than the first diameter.

The invention discloses a heart valve prosthesis, an artificial valve formed by the heart valve prosthesis and a preparation method of the artificial valve. The heart valve prosthesis comprises a supporting element of a tubular structure and at least two frondlets connected to the inner wall of the supporting element. The supporting element comprises an outer layer fabric with selvedges on the two opposite sides and a suture line fixing the other two sides of the outer layer fabric to form the tubular structure. Each frondlet is formed by stacking at least one frondlet layer; two opposite sides of the frondlet are respectively an interweaving side and a free side, the interweaving side is fixed between two selvedges of the outer fabric by a weaving method, and the free side is a selvedge. According to the heart prosthesis, the defect that the prosthesis is invalid or the material and the shape cannot meet the requirements due to the fact that the bending area of a full-textile heart prosthesis disclosed in the prior art is still overfatigued is overcome; and the durability is improved.

Disclosed is an implantable one-piece heart prosthesis having a driving artificial ventricle and a driven artificial ventricle. A main actuator is configured to transmit to the driving artificial ventricle diastolic and systolic flow rates having desired respective values for the driving artificial ventricle. An auxiliary actuator is configured to transmit to the driven artificial ventricle correction systolic and diastolic flow rates that correct the systolic and diastolic flow rates transmitted by the main actuator to the driven artificial ventricle.

The invention aims to provide a valve stent with small volume, good fatigability and strong anchoring force and an interventional prosthetic heart valve. The valve stent is characterized by comprisingan upper ring stent, a middle ring stent located at one side of the upper ring stent, and a lower ring stent located on one side, far away from the upper ring stent, of the middle ring stent, whereinthe upper ring support is provided with an upper ring, upper ring connecting rods and upper ring barbs, the upper ring connecting rods and the upper ring barbs are arranged on the extending direction, towards the middle ring stent, of the upper ring; the middle ring support is provided with a middle ring, middle ring connecting rods, a middle ring connecting holes, middle ring barbs and middle ring traction rings; the middle ring connecting holes are evenly distributed in the middle ring and inserted by the corresponding upper ring connecting rods, so that the middle ring stent is connected with the upper ring stent, the middle ring connecting rods are arranged on the extending direction, towards the lower ring stent, of the middle ring, and the middle ring barbs are arranged on the extending direction, towards the upper ring stent, of the middle ring; and the lower ring support is provided with a lower ring, lower ring connecting holes and lower ring traction rings.

A prosthesis for a cardiac valve including prosthetic leaflets which are intended to functionally replace the native leaflets of a cardiac valve following the implantation of the cardiac prosthesis. The prosthesis also including a prosthetic member on which there are mounted the prosthetic leaflets and which is intended to take up a stable, predetermined functional configuration in which the prosthetic member and the prosthetic leaflets reproduce the functionally correct configuration for the purpose of the physiological replacement of the native cardiac valve. The prosthetic member is preconfigured so as to move gradually from an altered, temporary functional configuration, in which the prosthetic member has a deformed geometry with respect to the stable, predetermined stable functional configuration, to said stable, predetermined functional configuration.