CPC F04D 13/027 (2013.01) [A61M 60/13 (2021.01); A61M 60/148 (2021.01); A61M 60/17 (2021.01); A61M 60/237 (2021.01); A61M 60/405 (2021.01); A61M 60/419 (2021.01); A61M 60/422 (2021.01); A61M 60/523 (2021.01); A61M 60/861 (2021.01); A61M 60/414 (2021.01); A61M 60/833 (2021.01)] | 30 Claims |
1. A system for assisting the blood circulation of a heart, comprising:
a heart assist pump device deliverable to the heart and comprising:
an inflow tube defining a blood inflow path and having a suction end insertable into a ventricle of the heart;
a magnetically driven rotor assembly configured to be axially aligned with the inflow tube and to be spaced apart from the suction end when the suction end of the inflow tube is inserted into the ventricle, the magnetically driven rotor assembly comprising a first magnetic device that is rigidly coupled to and axially adjacent to a rotor having guide surfaces to produce centrifugal flow components, the magnetically driven rotor assembly being rotatable about a central axis within a surrounding stationary housing to act upon blood flowing from the inflow tube to the rotor while the magnetically driven rotor assembly is entirely spaced apart from the stationary housing by a gap sized for passage of the blood;
a second magnetic device axially aligned with the inflow tube and positioned to magnetically drive rotation of the magnetically driven rotor assembly via a magneto coupling with the first magnetic device while being spaced apart and sealed from both the rotor and the first magnetic device of the magnetically driven rotor assembly, the second magnetic device being positioned axially spaced apart from the guide surfaces of the rotor;
a blood outflow port positioned radially adjacent the guide surfaces of the rotor such that, when the blood is driven by the magnetically driven rotor assembly, the blood exits the surrounding stationary housing in a direction substantially perpendicular to the central axis of the magnetically driven rotor assembly, wherein the magneto coupling is configured to both drive rotation of the magnetically driven rotor assembly and orient the magnetically driven rotor assembly such that the magnetically driven rotor assembly remains entirely spaced apart from the surrounding stationary housing by the gap sized for passage of the blood; and
an external control unit configured to regulate operation of the second magnetic device based upon a control value indicative of cardiac output, wherein the external control unit is connectable to the heart assist pump device for controlling the second magnetic device to thereby magnetically drive the rotation of the magnetically driven rotor assembly via the magneto coupling with the first magnetic device.
|