Patent ID: 9011678
Filing Date: 2015-04-21
Classification: A61M

Abstract:
1. a blood purification apparatus comprising: a first supply fluid channel having one end connected to a supply fluid container containing a supply fluid flowing in said first supply fluid channel; a first branched part connected to an other end of said first supply fluid channel; a second supply fluid channel having one end connected to said first branched part, and an other end connected to a hemofilter that purifies blood, said second supply fluid channel having a first pump; a third supply fluid channel having one end connected to said first branched part, and an other end connected to a blood channel in which blood taken from a patient flows, said third supply fluid channel having a second pump; a supply fluid measurement container having one end connected to said first branched part, and used for measuring an amount of the supply fluid flowing from said supply fluid container; a filtrate channel (i) which has one end connected to said hemofilter, (ii) which includes a third pump, and (iii) in which a filtrate from said hemofilter flows; a second branched part connected to an other end of said filtrate channel; a discharged-fluid container connected to said second branched part and containing the filtrate flowing in said filtrate channel; a filtrate measurement container connected to said second branched part, and used for measuring an amount of the filtrate flowing from said hemofilter; a balance detector which detects whether or not there is a balance between (i) an amount of decrease in a supply fluid contained in said supply fluid measurement container and (ii) an amount of increase in a filtrate contained in said filtrate measurement container, and which measures both an amount of the filtrate in said filtrate measurement container and an amount of the supply fluid in said supply fluid measurement container, said balance detector comprising a weight change amount calculation unit that calculates a flow amount of the filtrate and a flow amount of the supply fluid, and an increased/decreased amount calculation unit that calculates the amount of filtrate in said filtrate measurement container and the amount of the supply fluid in said supply fluid measurement container; and a control unit configured to control said first pump, said second pump, and said third pump, to maintain a balance between (i) the supply fluid contained in said supply fluid measurement container and the filtrate contained in said filtrate measurement container, and (ii) an amount of decrease in the supply fluid in said supply fluid measurement container and an amount of increase in the filtrate stocked in said filtrate measurement container based on a determination made by said weight change amount calculation unit.