The composite membrane for the artificial lung, the production manner and uses that the composite membrane die artificial lung

摘要

PURPOSE:To provide the above artificial lunge which obviates the leakage of blood plasma during long-term use, maintains a sufficient gas exchange capacity and has an excellent antithrombotic property by forming a film consisting of a specific water-swellable polymer compd. on the inside surfaces of the pores of a specific porous membrane. CONSTITUTION:The porous membrane is a hollow yarn-like porous membrane having 5 to 80mum thickness, 20 to 80% porosity, 0.01 to 5mum pore size and 100 to 1000mum inside diameter and the water-swellable high-polymer compd. has 30 to 80wt.% moisture content and =2 swelling ratio. The water-swellable polymer compd. is at least one kind of the water-swellable polymer compds. selected from a group consisting of a (meth)acrylic acid system, polyvinyl alcohol system, etc. The porous membrane is formed by coating the inside surfaces of the pores of the porous membrane with the water-swellable polymer compd. The composite membrane which does not allow the leakage of the blood plasma during the long-term use, has the sufficient gas exchange capacity and has the excellent antithrombotic property is obtd.