Multi-lumen-catheter flow valve system

A medical multi-lumen-catheter patency maintaining system comprising:

• at least two sources of medical liquid;
• at least two liquid communicating tubes, each liquid communicating tube connected at a proximal end to one of the at least two sources of medical liquid;
• a valve comprising at least two inlet ports, each inlet port being in liquid communication with one of said tubes, said valve further comprising at least two outlet ports;
• a patient insertable catheter comprising at least two lumens and means for connecting a proximal end of the catheter to said outlet ports such that each lumen of said catheter communicates with one outlet port;
• said valve further comprising a single rotary switching element interposed between the inlet ports and the outlet ports for switching pathways of liquid through the valve at at least two switchable positions whereat at a first position each inlet port and therefore each source is only fluidly connected to a different outlet port and therethrough to an individual lumen of said catheter and at a second position one inlet port only is fluidly connected to at least two outlet ports and therethrough to at least two lumens of the catheter thereby providing liquid from one source to at least two lumens of said catheter and liquid from at least one source is supplied to each lumen of the catheter in every switch position.