Related Experiment Video
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 2: optimization of the diffuser vane
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 configuration of the vaned diffuser of the integrated heart lung assist device (IHLAD) has been revised to reduce mechanical blood trauma caused by the device. The flow visualization study of the flow near the diffuser vanes revealed the existence of a rotating stall which deteriorates the hydrodynamic performance of the device and augments the chance for blood cells to pass through the regions with intense shearing forces. Design changes of the diffuser included decrease in vane number from 7 to 5 and decrease in passage width from 3 mm to 2 mm. This design change was effective to suppress initiation of a rotating stall. Improvement of hydrodynamic performance and antihemolytic properties was confirmed with the newly designed configuration based on the flow visualization study.
