초록 ▼

A blood pump apparatus can include a pump housing having a drive chamber containing a drive mechanism. A cupped member can be connected to the housing and the drive mechanism can include a motor for rotating an eccentric shaft. A pumping arm can be provided having one end riding on the eccentric sha

A blood pump apparatus can include a pump housing having a drive chamber containing a drive mechanism. A cupped member can be connected to the housing and the drive mechanism can include a motor for rotating an eccentric shaft. A pumping arm can be provided having one end riding on the eccentric shaft, an intermediate portion pivotably attached to the housing and another end connected to a movable plate. A roller bearing can be mounted on the eccentric shaft on which the arm can ride. A compressible blood chamber having an inlet and an outlet connected can be provided sandwiched between the cupped portion and the movable plate. The motor thus rotates the cam causing the pumping arm to pivot which cycles the movable plate against the blood chamber to pump blood. The movable plate can be implanted adjacent a lung such that the lung moves with the plate as blood is pumped and thereby functions as a compliance chamber. A speed reducer can be provided between the motor and the eccentric shaft. A hermetically sealing bellows can be provided to seal the drive chamber and the end of the pumping arm from body fluids. An enclosure bag can be provided surrounding all or a portion of the blood pump to provide a tissue friendly surface and to prevent tissue from becoming caught in the moving parts of the blood pump. A position sensor can be included for determining a volume of blood in the chamber for use by an electronic controller to control the speed of the motor to optimize pumping action.

대표청구항 ▼

[ What is claimed is:] [1.] A blood pump apparatus implantable in a patient adjacent said patient's lung for supplying blood to the patient's circulatory system, the blood pump apparatus comprising:a. a pump housing having a drive chamberb. a base connected to the pump housing;c. a compressible bloo

[ What is claimed is:] [1.] A blood pump apparatus implantable in a patient adjacent said patient's lung for supplying blood to the patient's circulatory system, the blood pump apparatus comprising:a. a pump housing having a drive chamberb. a base connected to the pump housing;c. a compressible blood chamber having a first side adjacent the base, the blood chamber having an inlet and an outlet each connectable to the circulatory system;d. a movable portion exterior to the base and housing and adjacent a second side of the blood chamber opposite said first side, said movable portion positionable adjacent a portion of said lung such that as the blood is pumped portions of volumetric changes in the compressible blood chamber are compensated for during movement of said movable portion;e. an arm having a first end pivotably connected to the movable portion; andf. a drive mechanism housed in the drive chamber and connected to a second end of the arm, wherein the drive mechanism operates the arm to compress the blood chamber between the movable portion and the base to pump blood through the circulatory system.