An apparatus for circulating a purge solution in an artificial organ has an ultrafiltration filter or reverse osmosis filter in a purge solution circulation route to inhibit passage of substances having molecular weights of 340,000 or more. A portion of the purge solution circulated by ...http://www.google.co.uk/patents/US5810758?utm_source=gb-gplus-sharePatent US5810758 - Purge solution circulating apparatus for artificial organ
