Abstract: A conduit forming unit includes: a cylindrical tubular body having flanges, on both end portions of the cylindrical tubular body; a first connection tubular body and a second connection tubular body respectively connected to a first end portion and a second end portion of the cylindrical tubular body; and tube joints for connecting the cylindrical tubular body and the first connection tubular body and the second connection tubular body to each other. The tube joint includes: a pawl equipped nut where a plurality of pawl portions which are engageable with the flange of the cylindrical tubular body are formed in the pawl equipped nut, the pawl portions engage with the flange so as to connect the first connection tubular body and the cylindrical tubular body to each other; and a retaining ring being annularly mountable on the pawl equipped nut and retaining engagement of the pawl portions with the flange.

Abstract: A connecting device is provided for connecting a pipe or tube-shaped element to the heart or a blood vessel of a patient, comprising a suture ring that has an opening, which can be closed by means of a closure element and through which said pipe or tube-shaped element is guided in the axial direction. The closure element is secured to the suture ring by means of at least one elastic securing element. A radially-expandable sealing element can also be provided in order to establish a sealing placement of the closure element against the suture ring.

Abstract: An apical cuff axial compression assembly including a ring member for coupling an apical cuff of a Ventricular Assist Device pump, to left ventricular apical tissue. Tissue anchors are employed to engage with the ring member and the apical cuff to exert direct or axial compression of the ring member to the apical cuff and to the left ventricular apical tissue. A first variant includes an axial compression ring and a plurality of openings to accommodate the tissue anchors. A second variant includes a segmented axial compression ring composed of a plurality of arcuate members, which may be contiguous or joined to each other or not. Each of the plurality of arcuate members has at least one tissue anchor opening passing there through.

Abstract: Methods and devices for implanting a ventricular assist device employ a coupler that engages an aperture formed in a heart wall and provides a conduit by which blood is pumped from the ventricle via the ventricular assist device. A method includes penetrating a distal end of a delivery device through a wall of a heart into a ventricle of the heart to form an aperture having a diameter in the wall. A coupler is deployed from the delivery device so that the coupler engages the aperture, expands the diameter of the aperture, and forms a conduit for a flow of blood from the ventricle. The delivery device is removed from the ventricle by retracting the delivery device through the conduit. The ventricular assist device is coupled to the coupler to receive the flow of blood from the ventricle and pump the flow of blood to assist circulation in the patient.

Abstract: An apical cuff axial compression assembly including a ring member for coupling an apical cuff of a Ventricular Assist Device pump, to left ventricular apical tissue. Tissue anchors are employed to engage with the ring member and the apical cuff to exert direct or axial compression of the ring member to the apical cuff and to the left ventricular apical tissue. A first variant includes an axial compression ring and a plurality of openings to accommodate the tissue anchors. A second variant includes a segmented axial compression ring composed of a plurality of arcuate members, which may be contiguous or joined to each other or not. Each of the plurality of arcuate members has at least one tissue anchor opening passing therethrough.

Abstract: A system is provided for connecting a blood pump to a heart, the system comprising: a blood pump for conveying blood, wherein the blood pump comprises a first tubular portion and a second tubular portion, and between the first and the second tubular portion, there is a flange-shaped portion; and comprising a connector having a tubular connector portion extending in an axial direction between a distal end and a proximal end having a lumen for receiving the first tubular portion of the blood pump, and having a flange-shaped connector portion arranged at the distal end for fastening the connector to an organ.

Abstract: A catheter pump includes an impeller and a drive shaft coupled with the impeller. The catheter pump includes a motor assembly coupled with the drive shaft. The motor assembly includes a motor housing having an opening through a wall of the motor housing and a flexible member disposed about the opening, the flexible member configured to engage a connection portion of a platform.

Abstract: An axial flow blood pump comprises: an impeller (2) that rotates around an axis and is provided with axial flow blades on the peripheral surface thereof, a permanent magnet inside the impeller (2), and a dynamic bearing or a pivot bearing; a first casing (5) that surrounds the peripheral surface of the impeller (2) and is provided with an intake port (11); an annular fixed element (6) that generates a rotating magnetic field in the impeller (2) and can be fitted onto the outer surface of the first casing (5); an outlet port (12); a second casing (3) that is provided with guide vanes (diffusers) (31) in the inner surface thereof; and a socket member (4) that is fittably and securely mounted onto the outer peripheral surface of the second casing (3) and is provided with a joining portion that can join with the fixed element (6).

Abstract: Embodiments of the disclosed technology are directed to a self-contained, totally implantable blood pump that replaces the whole heart. It is a small spherical device that encloses all of its blood propulsion dynamics. The dynamics are controlled by a built-in microcontroller that regulates the speed of the motor in response to hemodynamic changes like blood pressure fluctuations, level of body activity, and/or posture. The hemodynamic changes are detected using a plurality of sensors disposed around the body. An implantable transcutaneously rechargeable battery provides power to the microcontroller, motor and/or sensors.

Abstract: Various embodiments of the present invention provide a conduit device including an attaching device configured for defining a helical pathway through a tissue wall and complementary ring in cooperation for securing the device within an aperture defined in the tissue wall. Some embodiments of the present invention further provide a system for implanting a conduit device in a tissue wall. More specifically, some embodiments provide a system including a coring device for defining an aperture in a tissue by removing and retaining a tissue core and securely implanting a conduit device therein so as to provide fluid communication between a first and second surface of the tissue wall via the conduit device.

Abstract: In one general aspect, a cuff for attachment to a heart includes an attachment component configured to engage a blood pump to attach the cuff to the blood pump and a sewing ring for attachment to the heart. The sewing ring is coupled to the attachment component, and the attachment component and the sewing ring each define a central opening configured to admit an inflow cannula of a blood pump. The sewing ring comprises a member that provides rigidity to flatten a portion of a myocardium of the heart when the cuff is attached to the heart.

Abstract: A ventricular apex connector for quick connection and disconnection of an inflow tube of a ventricular assist device, comprising a sewing ring, a cylindrical ring, gripping pins, a spring ring and a sealing O-ring is provided. The cylindrical ring defines two openings, diametrically opposed to each other, in its walls. Gripping pins, comprising rods with gripping pads, are placed in the openings in the cylindrical ring so that the gripping pads are at rest within the inner circumference of the cylindrical ring. The spring ring is placed around the cylindrical ring and the rods of the gripping pads, which extend out of the outer wall of the cylindrical ring, are welded to the spring ring. The gripping pins are thus biased towards each other by the force of the spring ring. When the spring ring is squeezed, at points away from the gripping pin connection points, the deformation of the spring ring causes the gripping pads to be pulled out towards the inner wall of the cylindrical ring.

Abstract: A blood pump is implantable within the vasculature, such as within the pulmonary artery. The pump may project through a native valve such as the pulmonary valve. In use, the pump opposes retrograde flow and thus acts as a replacement for the native valve. The pump may be an axial flow pump having a generally tubular housing adapted to fit within the space proximal to the bifurcation of the pulmonary artery while projecting only slightly proximally of the annulus of the native pulmonary valve.

Abstract: 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.

Abstract: The present invention is directed to methods and apparatus for decreasing pressure in the left atrium of a patient by implanting a valved shunt through the atrial septum, whereby a volume of blood sufficient to reduce pressure in said left atrium is released to the right atrium.

Abstract: The disclosure relates to an artificial heart implant comprising a blood pump with a pump drive, a controller for controlling and regulating the pump drive, and an electrode that is connected to the controller and is used for detecting electrical quantities on the patient's heart. The controller controls the pump drive in accordance with the signals detected by the electrode.

Abstract: An artificial heart pump system is provided independently with a controlling processor for controlling an operation status of a blood pump so as to perform in a preset condition and with an observing processor for controlling a display unit displaying an operation status and an operation condition of the blood pump. In addition, a memory device is mounted in an outside-the-body type battery pack included in the artificial heart pump system; data such as pump data, event log or the like is stored therein; and data are collected and managed automatically by a battery charger when charging the battery charger for a daily performance. Further, an interface unit of an artificial heart pump is proposed where a user can confirm displayed contents of the controller without exposing the controller externally.

Abstract: This document relates to materials and methods for circulatory bypass of a ventricle in the heart of a mammal. For example, materials and methods for bypassing a permanently or temporarily impaired left ventricle in the heart of a mammal (e.g., a human) are provided.

Abstract: Methods and apparatus for decreasing cardiac pressure in a patient by implanting a shunt communicating with an area outside a first portion, whereby a volume of blood sufficient to reduce pressure in a first portion is released. Preferably, the end diastolic pressure in the left ventricle is reduced, which is accomplished by having the shunt communicate with the left ventricle so a small volume of blood is released from the left ventricle. 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, so that 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. In certain embodiments a semi-passive check-valve is controlled and actuated by an external signal.

Abstract: A device for connection between a heart prosthesis and a person's natural auricles includes a structure for joining to the natural auricles with individual suture attachments mounted so as to be free in rotation and movable.

Abstract: Device for rapid connection between a totally implantable heart prosthesis and natural articles. According to the invention, said prosthesis comprises: fastening means (16, 25) for fastening an end of one of the lunettes (2, 3) to the other lunette (3, 2), said fastening means being able to permit folding of said lunettes relative to each other; guide means (10, 11, 20, 21) for guiding said lunettes relative to each other before and during fastening and also during folding; and snap-fit means (19, 26) for engaging said lunettes on each other in the operating position corresponding to the end of said folding.

Abstract: A heart assist device connection system comprises an inflow connector in fluid-tight communication with an inflow section of a heart assist device. The connector is configured to be releasably connected to an inlet extension inserted into a patient's ventricle. The connector has one or more recesses configured to match a protrusion on the inlet extension. The system also comprises an outflow connector in fluid communication with an outflow section of the heart assist device. The outflow connector is configured to be releasably connected to a conduit attached-to the patient's vasculature.

Abstract: The disclosure relates to an artificial heart implant comprising a blood pump with a pump drive, a controller for controlling and regulating the pump drive, and an electrode that is connected to the controller and is used for detecting electrical quantities on the patient's heart. The controller controls the pump drive in accordance with the signals detected by the electrode.

Abstract: An extracardiac pumping for supplementing the circulation of blood, including the cardiac output, in a patient without any component thereof being connected to the patient's heart, and methods of using same. One embodiment provides a vascular graft that has a first end that is sized and configured to couple to a non-primary blood vessel and a second end that is fluidly coupled to a pump to conduct blood between the pump and the non-primary blood vessel. An outflow conduit is also provided that has a first end sized and configured to be positioned within the same or different blood vessel, whether primary or non-primary, through the vascular graft. The outflow conduit is fluidly coupled to the pump to conduct blood between the pump and the patient. The vascular graft may be connected to the blood vessel subcutaneously to permit application of the extracardiac pumping system in a minimally-invasive procedure.

Abstract: For connecting a cardiac biventricular assist means including a dual-chamber pumping device, and an electrically powered compressor means provided between the two chambers (12, 15) a partially flexible one-part or multi-part adapter (20) is provided with two through-passageways (21, 22; 34, 35) each separate from the other, said adapter being securely held, on the one hand, in a port (4a) in the apical portion of the septum (4) and, on the other, in a port (2a) in/at the apex of the left ventricle (2) so that the through-passageway (22; 35) extending into the left ventricle (2) is connected directly or by means of a first flexible tube (11) to the inlet (12a) of the one chamber (12) and the other through-passageway (21; 34) extending into said right ventricle (3) is connected directly or by means of a second flexible tube (14) to the inlet (15a) of the other chamber (15).

Abstract: A low profile pump inlet for an implantable blood pump is disclosed. The low profile pump inlet has an inflow diffuser for attachment to a conduit bearing an inflow of a fluid such as blood and an outflow orifice in fluid connection with the diffuser. The outflow orifice is configured to direct the fluid from the diffuser into a pump such as an implantable blood pump. The low profile pump inlet helps to suppress the effects of upstream pipe bends on the blood traveling through the inlet. The inlet thus provides a flow having a substantially uniform velocity profile into the blood pump.

Abstract: A prosthesis for large blood vessels includes a main conduit. At least one tract of the main conduit is subdivided into a plurality of smaller conduits located parallel to one another.

Abstract: Systems and methods for providing cardiac support provide a cannula body having an inlet and an outlet. The cannula includes a preformed bend sized and configured to extend within the heart chamber between the inlet and the outlet. The cannula is inserted through a first valve into a heart chamber and through a second valve out of the heart chamber. Blood is drawn into the cannula through the inlet and discharged from the cannula through the outlet, thereby bypassing the heart chamber.

Abstract: An improved intravascular blood pump system (10) and related methods involving the broad inventive concept of equipping the intravascular blood pump (12) with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient.

Abstract: The present invention relates to systems and methods for transporting fluid between different locations within a body cavity and, in one particular application, systems and methods for transporting fluids to maintain at least partial blood flow through a protected blood flow path within the right and/or left side of the heart during surgery. The protected blood flow path may be established by positioning one or more conduits within at least a portion of the right and/or left sides(s) of the heart. At least partial blood flow may be maintained through the protected blood flow path by the pumping action of a blood pump disposed within the conduit.

Abstract: The present invention is a unique method for the surgical introduction and implantation in-vivo of a ventricular assist device and the sutureless juncture of prepared inflow and outflow conduits extending from the ventricular assist device to the interior spatial volume of a chosen blood vessel and/or a cardiac chamber within a living subject. The present method employs an introducer assembly which serves as the means for placement of the inflow and outflow conduits of the implanted ventricular assist device.

Abstract: A ventricular apex connector for quick connection and disconnection of an inflow tube of a ventricular assist device, comprising a sewing ring, a cylindrical ring, gripping pins, a spring ring and a sealing O-ring is provided. The cylindrical ring defines two openings, diametrically opposed to each other, in its walls. Gripping pins, comprising rods with gripping pads, are placed in the openings in the cylindrical ring so that the gripping pads are at rest within the inner circumference of the cylindrical ring. The spring ring is placed around the cylindrical ring and the rods of the gripping pads, which extend out of the outer wall of the cylindrical ring, are welded to the spring ring. The gripping pins are thus biased towards each other by the force of the spring ring. When the spring ring is squeezed, at points away from the gripping pin connection points, the deformation of the spring ring causes the gripping pads to be pulled out towards the inner wall of the cylindrical ring.

Abstract: An extracorporeal vascular conduit for circulating blood outside a patient's body over an extended period of time in a manner that minimizes risk of thrombosis and complement activation and maximizes the ability of a patient to be ambulatory during recovery stages. The inventive vascular conduit comprises a first biocompatible material and a second synthetic material that is employed over a portion of the biocompatible material that extends outside the patient's body when is use. The majority of the portion that extends within the patient's body remains uncoated. A third synthetic material is applied around the conduit near the distal end of the second coating material of the catheter to permit a physician to secure the catheter to the patient's skin to minimize relative movement.

Abstract: An orthotopic total artificial heart for replacing the human heart comprising a new design of two assembled blood chambers with an original layout between themselves and between their inlet and outlet ports. Such design enables a significantly better space utilization inside the anterior mediastinum than the prior art; realizing the required anatomical fit.

Abstract: A dual pusher-plate blood pump implanted into the body with either mechanical or biological valves (17) for unidirectional blood circulation through a circulation variable chamber (blood chamber) (12) to assist circulation. LVAS comprises a receptacle (housing) (4) provided with an inlet (3) and an outlet (5) The pump inflow (3) is connected to the left atrium and the pump outflow to the descending thoracic aorta (5,7) and a pulsating external pneumatic unit (8).

Abstract: A blood pump having a pump housing and an impeller disposed in the housing and driven by an electric drive includes at least two connection devices directly disposed at the housing for connection to an artery outside the heart such as for example a suture ring or a vascular prosthesis and configured in such a manner to realize a direct connection of the artery to the pump housing, and wherein a pump conduit can be implanted into the aorta ascendens for relieving the left ventricle and in the truncus pulmonalis or into the pulmonalis furcation for reliving the right cardiac ventricle and other blood vessels for improving the blood circulation or elevating the pressure in a certain vascular section.

Abstract: A balloon is positionable in the patient's descending aorta. The balloon includes a balloon catheter and two pressure sensors that electrically couple to an extra-corporeal controller. The balloon itself also couples pneumatically to the extra-corporeal controller. An extra-corporeal pump electrically couples to the extra-corporeal controller, the pump having an outlet connectable to the patient's infra-diaphragmatic The pump inlet is connectable via a cannula to the patient's supra-diaphragmatic artery. artery. A doctor inserts the balloon into the descending aorta, and positions the balloon near the level of the patient's diaphragm. A balloon catheter, coupled to the extra-corporeal controller, inflates and deflates the balloon. An electrocardiogram ECG and proximal aortic blood pressure, measured in the upper arterial compartment via a lumen in the balloon catheter, serve as inputs to cycle the balloon synchronously with the heartbeat.

Abstract: A low profile pump inlet for an implantable blood pump is disclosed. The low profile pump inlet has an inflow diffuser for attachment to a conduit bearing an inflow of a fluid such as blood and an outflow orifice in fluid connection with the diffuser. The outflow orifice is configured to direct the fluid from the diffuser into a pump such as an implantable blood pump. The low profile pump inlet helps to suppress the effects of upstream pipe bends on the blood traveling through the inlet. The inlet thus provides a flow having a substantially uniform velocity profile into the blood pump.

Abstract: Pulsatile blood flow in a heart-lung machine is accomplished by pumping blood into a bladder at a constant rate, and cyclically emptying the bladder into aortic line of the heart-lung machine either by means of the bladder's own elasticity or by a mechanical compression mechanism which can be programmed to simulate the human heartbeat.

Abstract: A blood pump intended to be carried by a freely moving patient uses perpendicular magnetic and electrical fields to propel blood. A rod mounted coaxially inside a tube has electrodes in blood contact for establishing a radial electric field, and an inductor having windings parallel to the axis of the tube is used to establish a circumferential magnetic field. To avoid the evolution of gas at the electrode surfaces the magnetic and electric fields are periodically reversed, and the electrodes are made to have very high surface areas. The blood pump is powered by batteries or fuel cells (or a combination of both) to provide long service between recharging and to reduce the weight carried by the patient.

Abstract: An extracorporeal vascular conduit for circulating blood outside a patient's body over an extended period of time in a manner that minimizes risk of thrombosis and complement activation and maximizes the ability of a patient to be ambulatory during recovery stages. The inventive vascular conduit comprises a first biocompatible material and a second synthetic material that is employed over a portion of the biocompatible material that extends outside the patient's body when is use. The majority of the portion that extends within the patient's body remains uncoated. A third synthetic material is applied around the conduit near the distal end of the second coating material of the catheter to permit a physician to secure the catheter to the patient's skin to minimize relative movement.

Abstract: A connector for connecting a blood processing device to vascular tissue includes a vascular tissue connecting element that is suturable to a portion of the cardiovascular system for providing a flow connection. A junction ring is affixed to the vascular tissue connecting portion in order to form a substantially shape retaining connecting element. A locking ring for locking the junction ring to a blood processing device includes a coupling element configured to engage a port on the blood processing device so that rotation of the locking ring draws the junction ring to the port and locks the junction ring into a sealing relationship with the port. The locking ring is freely rotatable about the junction ring so that the locking ring can be rotated to lock the junction ring to the port without twisting the vascular tissue connecting element.

Abstract: A blood pumping device includes a receptacle for receiving blood and having a non-valved inlet and outlet openings coupled to an aorta and the femoral artery. The receptacle includes a surface having a peripheral portion coupled to a peripheral portion of a diaphragm, and having a port coupled to a pump. The pump may shrink the diaphragm to draw the blood into the receptacle and may expand the diaphragm to pump the blood in the chamber of the receptacle out of the inlet opening and the outlet opening of the receptacle and into the aorta and the femoral artery of the patient.

Abstract: Cooled and oxygenated blood is shunted from the heart or proximal aorta into the open ends of intercostal arteries severed during thoracoabdominal aortic surgery to prevent or minimize the effects of spinal ischemia. This cooled perfusion can be accomplished with a variety of perfusion assembly. For instance, a single vessel perfusion assembly can be employed to shunt the oxygenated blood from the heart or aorta to the lumen of a single intercostal artery. Cooled perfusion can also be performed with a branched multiple vessel perfusion assembly, which includes a branched conduit comprising a common portion and branch portions. The arterial perfusion assembly further comprises an inflow cannula formed at the end of the common portion and a plurality of outflow cannulae formed at the respective ends of the branch portions. The inflow cannula is configured to be inserted through the wall of the aorta, and the outflow cannulae are configured to be inserted within the open ends of the severed intercostal arteries.

Abstract: A medical connector for connecting a cardiac assist device to vascular tissue includes a base connector adapted to be attached to the cardiac assist device and a vascular tissue connector adapted to be attached to the vascular tissue. A retaining ring holds the base connector to the vascular tissue connector. The medical connector also includes an alignment feature and an engagement feature, each defined by a portion of either the base connector or the vascular tissue connector and a portion of the retaining ring. The alignment feature causes the vascular tissue connector to axially self-align with the base connector. The engagement feature causes the retaining ring to move first into a biased position and then to snap into engagement when the vascular tissue connector attaches to the base connector in an axially-oriented motion.

Abstract: An artificial heart has a driving section, a nozzle section, a pump section for insertion into a ventricle of a human heart, and a sealing section forming a seal for a driving shaft extending from the driving section for driving the pump section. A sealing liquid chamber filled with a sealing liquid is formed around the driving shaft between the sealing mechanism and the driving section. The sealing liquid in the sealing liquid chamber maintains the sealing mechanism in a liquid-tight state and lubricates the sealing mechanism, whereby blood is prevented from entering the driving section. Even if blood happens to enter the driving section, the blood is mixed with the sealing liquid and does not coagulate. Thus, the operation of the artificial heart is not suppressed.