Blood pump
First Claim
1. 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).
4 Assignments
0 Petitions
Accused Products
Abstract
The blood pump (BP) has an elongate tubular pump housing (10) wherein a motor (16) is arranged that drives a pump impeller wheel (22), the pump housing having an inlet (12) at one end and an outlet (18) at the opposite end. The motor (16) comprises a motor housing (15) sealed off against the blood flow. The pump impeller wheel (22) is located at the end of the motor housing (15) facing the inlet (12) and, together with a transition portion (13) of the pump housing (10), forms a rotary pump flown through diagonally, which creates an axial flow flowing around the motor housing (15). Here, the blood flow exclusively flows between stationary parts, thereby reducing the risk of blood decay caused by shear stresses.
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Citations
16 Claims
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1. 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 in that 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).
Specification