摘要:
An implantable heart system for the treatment of a heart with impaired function. The implantable heart system includes a prosthetic heart chamber assembly and a cooperative mechanism. The prosthetic heart chamber assembly comprises a first prosthesis, a second prosthesis, and a prosthetic heart chamber interconnecting the first and second prostheses. One of the prostheses is a valve and the other prosthesis is either a valve or a tubular prosthesis. The cooperative mechanism is selected from the group consisting of an adhesive; an anchor; a filler material; a shape memory element; an expandable member; a pumping agent; material attached to, or forming a part of, the wall of the prosthetic heart chamber; and combinations thereof.
摘要:
Mechanical circulatory supports configured to operate in series with the native heart are disclosed. In an embodiment, a centrifugal pump is used. In an embodiment, inlet and outlet ports are connected into the aorta and blood flow is diverted through a lumen and a centrifugal pump between the inlet and outlet ports.
摘要:
A medical device used in patients with inefficient heart function to improve the efficiency of the pumping action of the heart. This device adds one or more one-way valves in the blood vessels and/or arteries, very near, but not in, the heart, thereby increasing the efficiency of the native heart. The device includes one or more one-way heart valves designed to go in arteries/veins that are connected to the heart, and which arteries and/or veins are the conduits for taking blood into/out of the heart. The one-way heart valve allows blood flow in only one direction. An optional sleeve (stent) may be placed outside the arteries/veins where the valve(s) are located to add support to the walls. An optional sleeve (stent) may also be used on the inside of the artery to insure the artery does not collapse during a vacuum phase of the beating.
摘要:
A connecting element for connecting a blood pump or a cannula to a heart, the connecting element including a sealing element, which is designed to at least temporarily close an opening formed in the cardiac wall and to be opened via insertion of a preferably cylindrical object in the direction of an axis of the opening.
摘要:
A ventricular assist device (VAD) having static seal structure for a pump housing which includes a support structure, a first sealing element, and a second sealing element. The support structure circumscribes a pump chamber and includes a first sealing surface, an opposing second sealing surface, and a fluid transfer end interposed between the sealing surfaces. The support structure provides a fluid flow path running through the fluid transfer end and into the pump chamber via an inlet bore and from the pump chamber back through the fluid transfer end via an outlet bore. The first sealing element is disposed on the first sealing surface, and the second sealing element is disposed on the second sealing surface. The sealing elements are configured for forming sealing interfaces in the pump housing, establishing a static seal that isolates the pump chamber from an environment external to the fluid pump housing.
摘要:
A device is provided for transferring mass and/or exchanging energy between two media, particularly between blood and a gas/gas mixture. The device includes a chamber (2), through which the first medium flows and inside which at least one mass-permeable and/or energy-permeable hollow fiber (5), preferably a plurality of mass-permeable and/or energy-permeable hollow fibers (5), is/ are arranged. The second medium can flow through the at least one hollow fiber (5), while the first medium can flow therearound. At least one pumping element (5), which allows the first medium to be displaced from the chamber (2) and/or to be sucked into the chamber (2), is disposed in the chamber (2) of the device.
摘要:
A pulsatile, positive-displacement mechanical circulatory support pump which can be used for assistance or replacement of one or both ventricles. The pump includes a plurality of contractile elements radiating outward from an apex of a compliance chamber, the elements being incorporated in and/or in contact with at least a portion of an outer surface of the compliance chamber. These contractile elements include an electroactive dielectric elastomer or an ion exchange membrane metallic composite. Application of electric field pulses from an implantable electrical energy source such as a pacemaker will cause the contractile elements to compress and expand the compliance chamber.
摘要:
The present invention is thus directed to methods and apparatus for decreasing pressure in a first portion of a vessel of the cardiac structure of a patient by implanting a shunt communicating with an area outside said first portion, whereby a volume of blood sufficient to reduce pressure in said first portion is released. Preferably, the first portion comprises the left ventricle and the pressure reduced is the end diastolic pressure, which is accomplished by having the shunt communicate with the left ventricle so a small volume of blood is released from the left ventricle to reduce the end diastolic pressure. Most preferably, the shunt selectively permits flow when a pressure differential between the left ventricle and another chamber of a heart above a threshold pressure, whereby shunting is prevented during left ventricular systole, or, alternatively, selectively permits flow when a pressure differential between the left ventricle and another chamber of a heart is between a lower threshold and a higher threshold, whereby shunting is again prevented during left ventricular systole. In certain embodiments a semi-passive check-valve is controlled and actuated by an external signal, either using a signal generated by an intra-corporeal electrical battery or an externally coupled energy source. In certain embodiments, the shunt has a pump with an input connected to the left ventricle, or other portion with excessive pressure, and an output connected to a volume of lower pressure. The preferred method of implanting the shunt to effect the present invention is by deploying a tubular element having two ends and a tissue affixation element disposed at each of said ends via a catheter, preferably, the fixation element is a shape retaining metallic material that returns to its original shape as part of the retention aspect of its function. In preferred embodiments of the apparatus, the tubular element is comprised of a biologically inert non-metallic material.
摘要:
A coring knife can be used to make a circular incision. The coring knife includes an abutment that is inserted into an initial slit through the heart wall. The abutment can be inserted into the slit while oriented in a direction that minimizes its insertion profile. After insertion, the abutment is reoriented by turning a key so that its abutment surface faces toward a circular cutting edge of the coring knife on the other side of the heart wall. The circular incision through the heart wall is made by pressing the circular cutting edge of the coring knife against the abutment.
摘要:
A primary scotch yoke and a secondary scotch yoke are coupled in opposing arrangement and rigidly attached to a linearly reciprocating element. Each scotch yoke includes a rotary actuator with a cam follower and a yoke attached to the reciprocating element. Each yoke has a cam with an open gap through which the follower may be disengaged from the cam and stopped to an idle position. The follower of the secondary scotch yoke is kept idle in a position similarly disengaged from its cam. A controller detects a failure in the primary scotch yoke, disengages the cam follower of the primary yoke from its cam, and energizes the secondary scotch yoke, thereby causing its cam follower to engage its yoke and continue to provide uninterrupted motion to the reciprocating element, in particular the portable pneumatic pump driving an artificial heart.