PROBLEM TO BE SOLVED: To provide a configuration surely exhausting air in priming and preventing generation of a stasis area even during blood circulation.SOLUTION: A hollow-fiber membrane type oxygenator includes: a housing 1 that forms a gas exchange part 3 in which a bundle of a plurality of hollow-fiber membranes 12 are disposed gas ports 9 and 10 that circulate gas including oxygen through lumens of the hollow-fiber membranes a blood flow path 4 that traverses the hollow fiber bundle in the gas exchange part and circulates the blood and a tubular blood introduction port 5 and blood discharge port 6 that are provided in the housing in both end sides of the blood flow path. The blood discharge port is so configured that a base-end-side opening part that is a connecting portion to the housing, includes an uppermost peripheral edge of a flow path cross section of the blood flow path, the direction of a tube axis B of the distal end part of the blood discharge port is upward inclined in a vertical plane that includes a flow path central axis A of the blood flow path, and an angle θ formed by the direction of a tube axis of the blood discharge port heading for the downstream side with respect to the direction of the flow path central axis heading for the downstream side is set within 0<θ<90.COPYRIGHT: (C)2014,JPO&INPIT【課題】プライミング時に確実にエアーを排出し、血液循環中でも滞留部を生じない構造とする。【解決手段】複数本の中空糸膜12の束が配置されたガス交換部3を形成しているハウジング1と、中空糸膜の内腔を通して酸素を含むガスを流通させるガスポート9、10と、ガス交換部内の中空糸束を横切り血液を流通させる血液流路4と、血液流路の両端側のハウジングに設けられた管状の血液導入ポート5および血液排出ポート6とを備えた中空糸膜型人工肺。血液排出ポートは、ハウジングとの結合部位である基端側開口部が、血液流路の流路断面の最上位周縁を含むように設けられ、血液排出ポートの先端部の管軸B方向は、血液流路の流路中心軸Aを含む垂直面内において上方に向かって傾斜しており、流路中心軸の下流に向かう方向に対して、血液排出ポートの管軸の下流に向かう方向が形成する角度θが、0<θ<90の範囲内に設定されている。【選択図】図5
