Patent ID: 7241378

Claim:
A hemodialysis apparatus, comprising: means for measuring or calculating a blood volume or a blood volume change as a blood index level; a hemodialysis means; and a controlling means for controlling hemodialysis conditions of the hemodialysis means according to the blood index level, wherein the controlling means controls the hemodialysis means so that a hemodialysis operation is carried out without performing water removal when initiating the hemodialysis operation until the blood volume stabilizes, and the hemodialysis operation is carried out by performing water removal after the blood volume is stabilized by the hemodialysis operation, and wherein the controlling means enables calculation of a primary blood volume (BV 0 ) of an individual according the equation: ( BV 0 )=increased blood volume circulating outside the body (space outside the body)/% Δ BV x , wherein % ΔBV x is a ratio of the volume change of the blood volume (BV) when the hemodialysis operation is performed without performing water removal.