Abstract: The disclosed subject matter relates to extracorporeal blood processing or other processing of fluids. Volumetric fluid balance, a required element of many such processes, may be achieved with multiple pumps or other proportioning or balancing devices which are to some extent independent of each other. This need may arise in treatments that involve multiple fluids. Safe and secure mechanisms to ensure fluid balance in such systems are described.

Abstract: A ventricular assist device includes a pump such as an axial flow pump, an outflow cannula connected to the outlet of the pump, and an anchor element. The anchor element is physically connected to the pump, as by an elongated element. The pump is implanted within the left ventricle with the outflow cannula projecting through the aortic valve but desirably terminating short of the aortic arch. The anchor element is fixed to the wall of the heart near the apex of the heart so that the anchor element holds the pump and outflow cannula in position.

Abstract: A ventricular assist device includes a pump such as an axial flow pump, an outflow cannula connected to the outlet of the pump, and an anchor element. The anchor element is physically connected to the pump, as by an elongated element. The pump is implanted within the left ventricle with the outflow cannula projecting through the aortic valve but desirably terminating short of the aortic arch. The anchor element is fixed to the wall of the heart near the apex of the heart so that the anchor element holds the pump and outflow cannula in position.

Abstract: The present invention, in one embodiment, is a blood pump for intraventricular placement inside a heart of a mammalian subject including a rigid elongate member having a length between proximal and distal ends and a bore extending along the length, an anchor element connected towards the proximal end of the rigid elongate member and mounted to the subject's heart, a pump having an inlet and an outlet, a rotor and at least one electric drive coil for magnetically driving the rotor, the pump connected at or adjacent to the distal end of the rigid elongate member remote from the anchor element and wiring extending through the bore to the pump, wherein the proximal end of the rigid elongate member extends past the anchor element to a position outside of the subject's heart. Additional embodiments of a blood pump, and various methods of intraventricular placement inside a heart of a mammalian subject are also considered.

Abstract: The present invention, in one embodiment, is a blood pump for intraventricular placement inside a heart of a mammalian subject including a rigid elongate member having a length between proximal and distal ends and a bore extending along the length, an anchor element connected towards the proximal end of the rigid elongate member and mounted to the subject's heart, a pump having an inlet and an outlet, a rotor and at least one electric drive coil for magnetically driving the rotor, the pump connected at or adjacent to the distal end of the rigid elongate member remote from the anchor element and wiring extending through the bore to the pump, wherein the proximal end of the rigid elongate member extends past the anchor element to a position outside of the subject's heart. Additional embodiments of a blood pump, and various methods of intraventricular placement inside a heart of a mammalian subject are also considered.

Abstract: The present invention includes various devices and methods for ventricular assist. In one embodiment, the present invention is a ventricular assist device for intraventricular placement inside a heart of a mammalian subject, the device including a ring configured to be mounted adjacent an apex of the patient's heart; a rigid elongate member having a proximal and distal end; and a pump having a housing and an outflow cannula having a tip, the tip having a distal end projecting through an aortic valve of the subject's heart, wherein the ring and the pump are connected to the rigid elongate member remote from one another so that the rigid elongate member maintains the pump in position relative to the ring.

Abstract: A ventricular assist device includes a pump such as an axial flow pump, an outflow cannula connected to the outlet of the pump, and an anchor element. The anchor element is physically connected to the pump, as by an elongate element. The pump is implanted within the left ventricle with the outflow cannula projecting through the aortic valve but desirably terminating short of the aortic arch. The anchor element is fixed to the wall of the heart near the apex of the heart so that the anchor element holds the pump and outflow cannula in position.

Abstract: A ventricular assist device includes a pump such as an axial flow pump, an outflow cannula connected to the outlet of the pump, and an anchor element. The anchor element is physically connected to the pump, as by an elongate element. The pump is implanted within the left ventricle with the outflow cannula projecting through the aortic valve but desirably terminating short of the aortic arch. The anchor element is fixed to the wall of the heart near the apex of the heart so that the anchor element holds the pump and outflow cannula in position.