Abstract
Rotary blood pumps are used as blood pumps in the recent mechanical circulatory support, MCS. The magnetic suspension technique is a key to develop durable and bio-compatible rotary blood pumps for MCS. One of advantages of the magnetically suspended blood pump, MSBP, is a wide blood gap with the active magnetic suspension mechanism. The magnetic suspension mechanism can maintain wide blood gap between the rotated impeller and the fixed inner casing with a range of several hundreds micrometers. The wide blood gap guarantees better anti-hemolysis and anti-thrombogenicity properties of the pump with an enhanced blood stream in the gap. Also, the suspension of the impeller can be maintained under a wide range of rotating speeds from low speeds to high speeds. This feature contributes easier operation and wider usage of the mechanical circulatory support. The MSBP with a magnetic bearing has been designed based on the finite element simulation methods in magnetic field and fluid mechanics. The MSBP has indicated sufficient suspended performance and pump performance.
