Oxygenator of hollow fiber membrane type

摘要

An oxygenator 1 of hollow fiber membrane type of the present invention includes a cylindrical core 5; a cylindrical hollow fiber membrane bundle 3 consisting of a plurality of gas-exchange hollow fiber membranes 3a wound on an outer surface of the cylindrical core 5; a housing accommodating the cylindrical hollow fiber membrane bundle 3; a gas inlet portion and a gas outlet portion both communicating with the interior of the hollow fiber membrane 3a; and a blood inlet portion and a blood outlet portion communicating with the outside of the hollow fiber membrane 3a and the interior of the housing. The hollow fiber membranes of the cylindrical hollow fiber membrane bundle wound on cylindrical core 5 are multi-layered on the outer surface thereof. Each hollow fiber membrane layer has cross portions 3b of the hollow fiber membranes 3a in the neighborhood of the center of the cylindrical core 5 in a longitudinal direction thereof. Positions of the cross portions 3b of each of the respective hollow fiber membrane layers are differentiated from one another to prevent contact between the cross portions 3b of the hollow fiber membrane layers laminated on each other.