Hybrid gyroscopic switchable blood pump

A method of switching between two types of blood pumps, comprising a step of activating a switching mechanism of a switchable pump device implanted within a patient, the switchable pump device including a first pump in an operational condition and a second pump in an inoperative condition and being connected via cannulas to large blood vessels or ventricles of the patient, and upon activating the switching mechanism, the first pump of the switchable pump device is switched in vivo to the inoperative condition and the second pump of the switchable pump device is switched in vivo to the operational condition, wherein the switchable pump device comprises a pump assembly including the first and second pumps each having a separate inlet and outlet, an inner shell housing said pump assembly, and an outer shell housing said inner shell and having a pair of openings, said outer shell being interconnected to said inner shell such that said inner shell is movable relative to said outer shell during said activating step to enable the inlet and outlet of the second pump to be aligned with said pair of openings in said outer shell to place the second pump in the operational condition while the first pump is placed in the inoperative condition.