초록 ▼

A device for treatment of blood by extracorporeal circulation comprises a dialysis liquid circuit having a supply tube (9a, 9b) on which is arranged a filter (21) having a first chamber and a second chamber (22, 23) which are separated by a filtering membrane (24), the supply tube having a first por

A device for treatment of blood by extracorporeal circulation comprises a dialysis liquid circuit having a supply tube (9a, 9b) on which is arranged a filter (21) having a first chamber and a second chamber (22, 23) which are separated by a filtering membrane (24), the supply tube having a first portion (9a) connecting a dialysis liquid source (10) to an inlet of the first chamber (22), and a second portion (9b) having an end connected to an outlet of the second chamber (23) of the filter (21) and another end which can be connected to an inlet of a compartment (3) of an exchanger (1) with semipermeable membrane (4). A feedback tube (25) connects the inlet of the first chamber (22) of the filter (21) to the outlet of the first chamber (22). A flushing pump (26) is arranged on the feedback tube (25) for circulating liquid in the first chamber (22) of the filter (21) and causing cleaning of the membrane (24) by tangential flushing.

대표청구항 ▼

[ We claim:] [1.] A method for cleaning a filter having a first chamber and a second chamber separated by a filtering membrane, the first chamber having an outlet and having an inlet connected to a treatment liquid source, and the second chamber having an outlet for the filtered treatment liquid, th

[ We claim:] [1.] A method for cleaning a filter having a first chamber and a second chamber separated by a filtering membrane, the first chamber having an outlet and having an inlet connected to a treatment liquid source, and the second chamber having an outlet for the filtered treatment liquid, the method comprising the steps of:conveying treatment liquid from the source through the first chamber;recirculating during a recirculation mode, all treatment liquid from the outlet of the first chamber to the inlet of the first chamber so that all treatment liquid exiting the first chamber is fed-back through a feedback line into the first chamber;adding to the recirculating treatment liquid additional treatment liquid from the source;measuring a clogging level of the filter;comparing the measured clogging level with a predetermined clogging threshold;intermittently purging during a purge mode, the first chamber when the measured clogging level reaches the predetermined clogging threshold;measuring a frequency of purges of the first chamber;comparing the measured purge frequency with a purge frequency reference value; andincreasing flow speed of treatment liquid through the first compartment when the measured purge frequency exceeds the purge frequency reference value.