Patent ID: 6572530
Filing Date: 2003-06-03
Classification: A61M

Abstract:
A blood circulation assisting device comprising:a continuous flow blood pump comprising a non-displacement-type pump for blood feeding assistance, a motor for driving said continuous flow blood pump, a blood removing pipe having one end attachable to a blood removal site in an organism and the other end connected to an inflow portion of said continuous flow blood pump, a blood feeding pipe having one end attachable to a blood feed site in the organism and the other end connected to an outflow portion of said continuous flow blood pump, wherein blood is removable via said blood removing pipe and drivable out via said blood feeding pipe by said continuous flow blood pump so as to attain a predetermined flow rate, said blood circulation assisting device further comprising flow rate detection means for directly or indirectly obtaining data corresponding to a blood flow rate flowing through said continuous flow blood pump, fluctuation amplitude detection means for obtaining, from an output of said flow rate detection means, data corresponding to a fluctuation amplitude of the flow rate, specific point detection means for detecting at least one of a t-point and a s-point, the t-point and the s-point being a starting point and an end point, respectively of a range where the fluctuation amplitude of the flow rate shows a negative correlation with a speed of the motor, and adjusting means for adjusting a motor speed based on an output of said specific point detection means.