The roller type micropump driven by the pulse motor was developed as the insulin infusion pump for artificial cell. Flow rate of this pump is able to control by output signals of microcomputer. The volume displacement for one pulse was about 0.006μl. The pump output was increased in quite linear fashion from 0.003 to 0.1ml/min as increase the pulse number. The reproducibility was better than 2 % and pump flow rate was independent of load pressure.
As the next version of this type of pump, smaller one was also developed. Dimensions and weight of this pump are almost same as those of an usual wrist watch, so that it can be put on the patient's hand.
