| 摘要 |
<p>To provide a flow rate control device of a multi stages switching type in which switching of liquid medicine routes by a patient is made difficult, flow path switching operation is simplified and erroneous operation is not caused, a three-way stopcock 10 is integrated to a flow rate control unit 20 of a flow rate control device where the flow rate is controlled by flow resistance of the flow rate control tubes 22, 23 and 24 by which the flow rate can be switched in multi stages, three branch paths 251, 252 and 253 are installed on the side of a inlet 25 of the flow rate control unit 20, the flow rate control tubes 22, 23 and 24 are connected to the respectives of the branch paths 251, 252 and 253, meanwhile, two branch paths 261 and 262 are installed on the side of an outlet 26 of the flow rate control unit 20, the flow rate control tube 22 and a connection tube 27 are connected thereto, the flow rate control tubes 23 and 24 are connected to flow inlet ports 15 and 16 of the three-way stopcock 10 and the connection tube 27 is connected to a flow outlet port 17 of the three-way stopcock 10.</p> |
