An implantable ventricular assist device comprising:
- an intraventricular stent used for the creation of an artificial chamber inside a ventricle by a three-dimensional mesh-like hollow supporting structure;
- a balloon-like structure is disposed inside the intraventricular stent to drive the change of the artificial chamber between a contractile configuration and a diastolic configuration, wherein in the contractile configuration, the balloon-like structure expands and occupies the space of the artificial chamber and drives the blood inside the artificial chamber to flow to outside the artificial chamber through the mesh-like structure of the intraventricular stent;
- wherein in the diastolic configuration, the balloon-like structure shrinks and releases the space inside the artificial chamber, and the blood outside the artificial chamber flows back into the artificial chamber through the mesh-like structure of the intraventricular stent;
- a power system for driving the change of the balloon-like structure between the contractile configuration and the diastolic configuration;
- wherein the power system comprises a magnetic squeeze drive structure which is used for driving the changes of the balloon-like structure between the contractile configuration and diastolic configuration, and comprises a driving pad, a driving chamber, a driving medium, a driving tube and a driving holder;—
- the driving chamber provided on the driving holder is a soft structure with a resilient outer wall and adjacent to a first driving pad and a second driving pad;
- the first driving pad is attached on the one side of the resilient outer wall of the driving chamber and further fixed on the one side of the driving holder, and the second driving pad is attached on the opposite side of the resilient outer wall of the driving chamber and free from the driving holder, the driving chamber is filled with the driving medium, and the first driving pad has a magnetic field generator and the second driving pad has a magnetic material which is able to be attracted to the magnetic field generator when the magnetic field generator generates a magnetic field;
- the driving chamber is compressible when the first driving pad generates a magnetic field and the second driving pad is attracted to the first driving pad and moves toward the first driving pad, so as to drive the driving medium inside the driving chamber into the balloon-like structure through the driving tube and expand the balloon-like structure to the contractile configuration;
- the driving chamber is able to be decompressed and restored by actuating the resilient outer wall of the driving chamber along with the second driving pad when the first driving pad stops generating a magnetic field and the second driving pad is not attracted to the first driving pad and released from the first driving pad, so as to suck the driving medium in the balloon-like structure to flow back into the driving chamber and shrink the balloon-like structure to the diastolic configuration.