| 摘要 |
PROBLEM TO BE SOLVED: To keep liquid medicine substantially in constant quantity from the first to the last in continuous injection of the liquid medicine for a long period. SOLUTION: In a device comprising a liquid medicine in/out port 2 to which a liquid medicine discharge assembly and a liquid medicine injection syringe can be freely connected, a sealed container 1 having rigidity provided with an air injection port 7, a liquid medicine bag 8 of flexible material contained in the sealed container 1 and connected to the liquid medicine in/out port, and an air pump 13 connected to the air injection port 7 by a tube, discharge is prohibited in the condition where the liquid medicine discharge assembly is not installed on the liquid medicine in/out port 2, while discharge of liquid medicine is allowed in the condition where the liquid medicine discharge assembly is installed to enlarge a check valve by a passage pipe. Since air pressure in the sealed container 1 is kept constant by the sealed container 1, liquid medicine injection quantity can be kept constant for a long period. |
