Patent ID: 6116862
Filing Date: 2000-09-12
Classification: A61M

Abstract:
A blood pump for supporting or replacing the cardiac function, comprising a pump housing (10) in which a motor (16) is arranged that drives a pump impeller wheel (22), and which has an inlet (12) at one end and an outlet (18) at the other end,the motor (16) comprising a motor housing (15) concentrically arranged in the pump housing (10) and sealed off against the blood flow, the pump impeller wheel (22) being arranged at the end of the motor housing (15) that faces the inlet (12) and forming a rotary pump with a transition portion (13) of the pump housing (10), which pump creates an axial flow annularly flowing about the motor housing (15), and said axial flow being enclosed by stationary walls,characterized inthat the pump housing is elongate and tubular and that an annular channel (35) directing a whirling helical flow is provided between the pump housing (10) and the motor housing (15).