Abstract: An extracorporeal circulation apparatus capable of maintaining hypothermia for a prolonged period when used in the selective cooling method. The extracorporeal circulation apparatus used in the selective cooling method includes (1) a diluent supply unit for cooling a diluent and metering the diluent into a blood vessel; (2) a blood concentration unit for metering a diluted blood out from a blood vessel and concentrating the diluted blood thus drawn out by filtering the diluted blood; and (3) a blood supply unit for heating the concentrated blood and metering the concentrated blood into a blood vessel, wherein a flow rate of the injected diluent flow rate, Vd and a flow rate of a filtrate, Vb are so controlled that a relationship 0.1 Vd≦Vb≦Vd is maintained.

Abstract: A hollow polysulfonic fiber intended for a selectively transmissive membrane contains a hydrophilic polymer which is cross-linked into a water-insoluble form (for example polyvinylpyrrolidone) and is used in the form of a hydrogel containing water. A method for the production of a membrane module consists in spinning a hollow fiber by the use of a spinning solution containing a polysulfonic resin and a hydrophilic polymer, wetting the fiber above the saturated moisture content, and then, with the wet condition maintained, subjecting the fiber to the processes of module molding and radiation induced cross-linking, these processes being performed in either order. The method provides a selectively transmissive hollow polysulfone fiber membrane which displays less elution into water and a sharp molecular weight fractionation, so as to be usable safely in the fields of medicine and foodstuffs.

Abstract: A hollow polysulfonic fiber intended for a selectively transmissive membrane contains a hydrophilic polymer which is cross-linked into a water-insoluble form (for example polyvinylpyrrolidone) and is used in the form of a hydrogel containing water. A method for the production of a membrane module consists in spinning a hollow fiber by the use of a spinning solution containing a polysulfonic resin and a hydrophilic polymer, wetting the fiber above the saturated moisture content, and then, with the wet condition maintained, subjecting the fiber to the processes of module molding and radiation induced cross-linking, these processes being performed in either order. The method provides a selectively transmissive hollow polysulfone fiber membrane which displays less elution into water and a sharp molecular weight fractionation, so as to be usable safely in the fields of medicine and foodstuffs.

Abstract: This invention provides method and membrane for hemodialysis which has a total protein permeability of not more than 0.2%, and has a reduction rate of .beta..sub.2 -microglobulin of not less than 5%. The hemodialysis membrane of the present invention selectively removes .beta..sub.2 -microglobulin which was shown to cause some long-term complications such as carpal tunnel syndrome in the patients undergoing hemodialysis, while preventing the leakage of useful proteins.

Abstract: This invention provides method and membrane for hemodialysis which has a total protein permeability of not more than 0.2%, and has a reduction rate of .beta.2-microglobulin of not less than 5%. The hemodialysis membrane of the present invention selectively removes .beta.2-microglobulin which was shown to cause some long-term complications such as carpal tunnel syndrome in the patients undergoing hemodialysis, while preventing the leakage of useful proteins.

Abstract: Method for producing a synthetic fiber substantially comprising dissolving a composition consisting essentially of:A. 5-40 percent by weight of a copolymer consisting ofA. 20-80 percent by weight of polyvinyl alcohol, andB. 80-20 percent by weight of acrylonitrile, andB. 60-95 percent by weight of a copolymer consisting ofC. 55-95 percent by weight of styrene, andD. 5-45 percent by weight of acrylonitrile, in dimethyl sulfoxide or dimethyl acetamide as a solvent, and wet-spinningThis fiber is used for producing paper and has a potentially fibrillar texture. When beaten, it forms a synthetic pulp having stalk fibrils and micro fibrils extending from the stalk fibrils.High-tenacity synthetic paper can be made because this synthetic pulp is self-adhesive.