| 摘要 |
PURPOSE: To provide a blood collecting device which may collect the most adequate amount of blood consecutively from a blood donator by controlling speed of a blood pump current so that a pressure fluctuation, caused by a particular speed change of the current, stays at a figure just under the maximum allowable one. CONSTITUTION: This control device controls blood speed Q of a blood pump so that pressure changeΔPA caused by a particular change of blood speedΔQ stays at a figure Qm which is just under the maximum allowable pressure figureΔPAm . That is, a blood speed measurement device outputs electrical signal of measured speed that is inputted to a control device 8 by a signal line 13, then the control device controls blood speed of a blood pump 7 according to measured figures of a pressure PA and the blood speed Q. The control device 8 is installed with a microprocessor, which confirms the control device is driven according to a specified controlling algorithm. Thus, collecting blood from a donator with a consecutive and adequate speed is made possible.
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