Patent ID: 7651473
Filing Date: 2010-01-26
Classification: A61M

Abstract:
1. An extracorporeal blood circulating apparatus comprising: a closed-type venous reservoir having a blood storage chamber for storing blood and a volume adjusting chamber for storing an adjusting liquid for volume adjustment that are disposed adjacently by partitioning a closed space formed by a housing with a flexible septum member; an adjusting liquid tank for storing the adjusting liquid that is connected to the volume adjusting chamber; and a blood pump that is connected to the blood storage chamber, the housing being provided with an inflow port for allowing blood to inflow and an outflow port for allowing blood to outflow that respectively communicate with the blood storage chamber, and an adjusting port for injecting and ejecting the adjusting liquid that communicates with the volume adjusting chamber, the blood pump being connected to the blood storage chamber via the outflow port, the adjusting liquid tank being connected to the volume adjusting chamber via the adjusting port, wherein the apparatus is provided with a supporting unit that holds the adjusting liquid tank so that a height of the adjusting liquid tank is variable, the adjusting liquid tank and the adjusting port are connected by a conduit member having a configuration that can adjust a flowing amount, and configured such that when the height of the adjusting liquid tank is changed, in accordance with a change in a relative height of the adjusting liquid tank with respect to the closed type venous reservoir, an amount of the adjusting liquid stored in the volume adjusting chamber is varied based on a difference in height, thereby the septum member being deformed in the housing so as to vary the volume of the blood storage chamber.