Implantable blood pump with inextensible deformable closed bag

Details Implantable blood pump with inextensible deformable closed bag Implantable blood pump with inextensible deformable closed bag

1992-03-18

1993-12-21

Kamm, William E.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Corporeal artificial heart, heart assist , control...

600 16, A61M 112

Patent

active

052717461

ABSTRACT:
The invention relates to an implantable blood pump of the type comprising a shell, a closed deformable bag, an inlet valve and an outlet valve, a drum arranged to roll over a wall of the bag, a bracket mounted to rotate about the axis of the drum and connected by an inextensible flexible component to one of the end edges of the bag, and an electric motor integrated inside the drum and suitable for driving the bracket and the drum in mutual and antagonistic rotation over a fraction of a turn to compress the bag which winds onto the drum to expel blood fluid. According to the invention, the outer shell is rigid and constitutes a sealed housing in which the bag can deform, and the bag is made, at least in part, of a material that is inextensible in two directions so that its original volume remains constant, said bag thus being made insensitive to external underpressure tending to increase its volume while blood fluid is being expelled. The invention is applicable to making non-displacement peristaltic cardiac prosthesis.

REFERENCES:
patent: 4750903 (1988-06-01), Cheng
patent: 4902291 (1990-02-01), Kolff
patent: 4976729 (1990-12-01), Holfert et al.

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