title: Progress in the development of the DexAide right ventricular assist device.
abstract: The DexAide right ventricular assist device (RVAD) is an implantable centrifugal pump modified from the CorAide left ventricular assist device. As previously published, in vitro performance testing of the DexAide RVAD has met design criteria, and the nominal operating condition of 4 l/min and 20 mm Hg pressure rise was achieved at 2,000 rpm, with a power consumption of 1.9 watts. In vivo studies in 14 calves have demonstrated acceptable hemodynamic characteristics. The calf inflow cannula design is still evolving to minimize depositions on the cannula observed in most experiments. Fitting studies were performed in 5 cadavers and 2 patients to reconfigure the cannulae for use in humans. The design and development of external electronics have been completed for the stand-alone RVAD system, and verification tests are under way in preparation for preclinical tests. Work on the external electronics design for the biventricular assist system is ongoing. In conclusion, the initial in vitro and in vivo studies have demonstrated acceptable hemodynamic characteristics of the DexAide RVAD. The design and development of the external electronic components for the stand-alone RVAD system have been completed. The calf inflow cannula is being redesigned, and chronic in vivo tests are under way.
authors.affiliation: Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA.
authors.forename: Kiyotaka
authors.initials: K
authors.lastname: Fukamachi
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Ootaki
authors.forename: David J
authors.initials: DJ
authors.lastname: Horvath
authors.forename: Alex L
authors.initials: AL
authors.lastname: Massiello
authors.forename: Keiji
authors.initials: K
authors.lastname: Kamohara
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Akiyama
authors.forename: Faruk
authors.initials: F
authors.lastname: Cingoz
authors.forename: Chiyo
authors.initials: C
authors.lastname: Ootaki
authors.forename: Michael W
authors.initials: MW
authors.lastname: Kopcak
authors.forename: Raymond
authors.initials: R
authors.lastname: Dessoffy
authors.forename: Jenny
authors.initials: J
authors.lastname: Liu
authors.forename: Ji-Feng
authors.initials: JF
authors.lastname: Chen
authors.forename: Qun
authors.initials: Q
authors.lastname: Zhou
authors.forename: Stephen
authors.initials: S
authors.lastname: Benefit
authors.forename: Leonard A R
authors.initials: LA
authors.lastname: Golding
authors.forename: Sue
authors.initials: S
authors.lastname: Alfini
authors.forename: David T
authors.initials: DT
authors.lastname: Rowe
mesh_terms: D000818:Animals; D001698:Biomedical Engineering; D001794:Blood Pressure; D002417:Cattle; D006333:Heart Failure / Q000601:surgery*; D006353:Heart-Assist Devices / Q000639:trends*; D006801:Humans; D011474:Prosthesis Design; D011673:Pulsatile Flow