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Updated: Aug 30, 2026
Evaluating Regional Pulmonary Deposition using Patient-Specific 3D Printed Lung Models
Published on: November 11, 2020
Design progress of the ultracompact integrated heart lung assist device--part 1: effect of vaned diffusers on
Tomonori Tsukiya1, Eisuke Tatsumi, Tomohiro Nishinaka
1Department of Artificial Organs, Research Institute of National Cardiovascular Center, Suita, Osaka, Japan. tsukiya@ri.ncvc.go.jp
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.
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