title: High-resolution fluorescent particle-tracking flow visualization within an intraventricular axial flow left ventricular assist device.
abstract: Flow visualization is typically applied in blood pump development to both confirm the design expectations and identify regions that may be predisposed to blood element deposition and trauma. Rotary pumps, in particular, place high demands on the technique chosen to visualize the flow given the limited visual accessibility of the flow path and the high impeller speeds. Fluorescent image-tracking velocimetry currently is used at the University of Pittsburgh Medical Center to visualize flow accurately inside of these pumps both qualitatively and quantitatively. Flow patterns under steady conditions within an intraventricular axial flow, left ventricular assist pump (prototype No. 7, SUN Medical Technology Research Corporation, Nagano, Japan) were investigated using this technique. The flow fields at the impeller-stator interface and at the pump outlet were given specific attention. This allowed the assessment of the fluid dynamics throughout the hydrodynamic design limits of the pump.
authors.affiliation: University of Pittsburgh Medical Center, Pennsylvania, USA.
authors.forename: J P
authors.initials: JP
authors.lastname: Kerrigan
authors.forename: K
authors.initials: K
authors.lastname: Yamazaki
authors.forename: R K
authors.initials: RK
authors.lastname: Meyer
authors.forename: T
authors.initials: T
authors.lastname: Mori
authors.forename: Y
authors.initials: Y
authors.lastname: Otake
authors.forename: E
authors.initials: E
authors.lastname: Outa
authors.forename: M
authors.initials: M
authors.lastname: Umezu
authors.forename: H S
authors.initials: HS
authors.lastname: Borovetz
authors.forename: R L
authors.initials: RL
authors.lastname: Kormos
authors.forename: B P
authors.initials: BP
authors.lastname: Griffith
authors.forename: H
authors.initials: H
authors.lastname: Koyanagi
authors.forename: J F
authors.initials: JF
authors.lastname: Antaki
mesh_terms: D001696:Biomechanical Phenomena; D001783:Blood Flow Velocity / Q000502:physiology; D018495:Fluid Shifts; D005453:Fluorescence; D006353:Heart-Assist Devices; D008962:Models, Theoretical; D010316:Particle Size; D012212:Rheology / Q000379:methods*