Patient-controlled analgesia (PCA) apparatus capable of continuous injection and additional administration of drugs solution

摘要

A patient-controlled analgesia (PCA) apparatus capable of additional administration simultaneously with continuous injection is provided, in which a drug solution can be administered additionally via a release valve (4,6) while being injected continuously in a slight amount via a flow rate control tube. The period of drug solution injection can be controlled by changing the length of the flow rate control tube, the amount of administration can be selected as desired by changing the size of a sub-reservoir (7), the line is simple, operation is easy, defects such as leakage are prevented, and manufacturing cost is low.