title: Hydrodynamics of aortic cannulae during extracorporeal circulation in a mock aortic arch aneurysm model.
abstract: This study was designed to analyze flow pattern, velocity, and strain on the aortic wall of a glass aortic arch aneurysm model during the extracorporeal circulation, and to elucidate the characteristics of flow pattern in three different aortic cannulae. Different patterns of large vortices and helical flow were made by each cannula. With the curved end-hole cannula, the high velocity flow (approximately 0.6-0.8 m/s) was blowing to the aneurismal wall without attenuating the strain rate tensor (approximately 0.2-0.25/s). With the dispersion cannula and the Soft-Flow cannula, cannular jet was attenuated in the ascending aorta creating a large vortex at a velocity less than 0.5 m/s, and the strain rate tensor on the aneurismal wall was small (less than 0.15/s). In conclusion, end-hole cannula should not be used in the operation of aortic arch aneurysm. Dispersion-type aortic cannulae were less invasive on the aortic arch aneurismal wall, but particular attention to alternative cannulation sites should be paid in cases with severe atherosclerosis on the ascending aortic wall.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Hirosaki University School of Medicine, Hirosaki, Japan.
authors.forename: Masahito
authors.initials: M
authors.lastname: Minakawa
authors.forename: Ikuo
authors.initials: I
authors.lastname: Fukuda
authors.forename: Takao
authors.initials: T
authors.lastname: Igarashi
authors.forename: Kozo
authors.initials: K
authors.lastname: Fukui
authors.forename: Hideki
authors.initials: H
authors.lastname: Yanaoka
authors.forename: Takao
authors.initials: T
authors.lastname: Inamura
mesh_terms: D001011:Aorta; D001013:Aorta, Thoracic; D001014:Aortic Aneurysm; D006328:Cardiac Catheterization / Q000295:instrumentation*; D005112:Extracorporeal Circulation / Q000295:instrumentation*; D006801:Humans; D008953:Models, Anatomic; D011673:Pulsatile Flow; D012039:Regional Blood Flow; D012212:Rheology / Q000295:instrumentation*