Patent ID: 8535213

Claim:
A ventricular assist device, comprising: a case; a pair of blood bags installed inside the case, each of the blood bags including an inlet port connected to a ventricle of a heart to introduce therethrough blood flowing out from the ventricle, an internal space formed to store the blood introduced through the inlet port and an outlet port connected to an artery to discharge therethrough the blood stored in the internal space, the internal space having a variable volume; and a squeezing unit installed inside the case, the squeezing unit configured to alternately squeeze the blood bags in such a way that, if one of the blood bags is squeezed to discharge the blood, the other blood bag is inflated to draw the blood, wherein the squeezing unit includes a motor and a squeezer connected to and driven by the motor, the squeezer configured to, when driven, alternately squeeze the blood bags, wherein the motor is configured to rotate in a forward direction and a reverse direction, the squeezer configured to squeeze one of the blood bags when the motor rotates in the forward direction and to squeeze the other blood bag when the motor rotates in the reverse direction.