title: Design progress of the ultracompact integrated heart lung assist device--part 1: effect of vaned diffusers on gas-transfer performances.
abstract: The integrated heart lung assist device (IHLAD) has been developed to overcome the problems of currently available extracorporeal membrane oxygenation devices. The integrated structure of a centrifugal blood pump and cylindrical bundle of polyolefin hollow-fibers has allowed a remarkably compact size for the device. This study deals with the design change of the IHLAD that added to the vaned diffuser between the impeller of the centrifugal pump and the hollow-fiber bundle with a view to enhancing the gas-transfer performance. Ex vivo gas-transfer performance tests were carried out, as well as hydrodynamic characteristics and hemolysis test using fresh goat blood. The oxygen transfer rate was generally improved, and the carbon dioxide removal rate was slightly improved. Intolerable amount of hemolysis (index of hemolysis= 0.177) was caused by the IHLAD, which must be resolved by improving the design in the future.
authors: Department of Artificial Organs, Research Institute of National Cardiovascular Center, Suita, Osaka, Japan. tsukiya@ri.ncvc.go.jp
authors: Tomonori
authors: T
authors: Tsukiya
authors: Eisuke
authors: E
authors: Tatsumi
authors: Tomohiro
authors: T
authors: Nishinaka
authors: Nobumasa
authors: N
authors: Katagiri
authors: Yoshiaki
authors: Y
authors: Takewa
authors: Hiroyuki
authors: H
authors: Ohnishi
authors: Mitsuo
authors: M
authors: Oshikawa
authors: Kyoko
authors: K
authors: Shioya
authors: Toshihide
authors: T
authors: Mizuno
authors: Yoshiyuki
authors: Y
authors: Taenaka
authors: Hisateru
authors: H
authors: Takano
authors: Soichiro
authors: S
authors: Kitamura
mesh_terms: D000818:Animals; D002245:Carbon Dioxide / Q000097:blood; D004867:Equipment Design; D006041:Goats; D006353:Heart-Assist Devices; D006355:Heart-Lung Machine; D008422:Materials Testing; D008567:Membranes, Artificial; D010100:Oxygen; D010107:Oxygenators, Membrane
chemical_list: D008567:Membranes, Artificial; D002245:Carbon Dioxide; D010100:Oxygen