Abstract
The gaps between the blades and the shroud (or hub) of an axial blood pump affect the hydraulics, efficiency, and hemolytic performance. These gaps are critical parameters when a blood pump is manufactured. To evaluate the influence of blade gaps on axial blood pump performance, the flow characteristics inside an axial blood pump with different radial blade gaps were numerically simulated and analyzed with special attention paid to the hydraulic characteristics, gap flow, hydraulic efficiency, and hemolysis index (HI). In vitro hydraulic testing and particle image velocimetry testing were conducted to verify the numerical results. The simulation results showed that the efficiency and pressure rise decreased when the gap increased. The efficiency of the axial blood pump at design point decreased from 37.1% to 27.1% and the pressure rise decreased from 127.4 to 71.2 mm Hg when the gap increased from 0.1 to 0.3 mm. Return and vortex flows were present in the outlet guide vane channels when the gap was larger than 0.2 mm. The HI of the blood pump with a 0.1 mm gap was 1.5-fold greater than that with a 0.3 mm gap. The results illustrated poor hydraulic characteristics when the gap was larger than 0.15 mm and rapidly deteriorated hem...Continue Reading
References
Jan 1, 1980·Biorheology·G Heuser, R Opitz
Feb 1, 1995·Artificial Organs·J T WernickeM E DeBakey
Jul 1, 1995·Artificial Organs·C Bludszuweit
Aug 27, 1999·Artificial Organs·P E AllaireD B Olsen
Aug 29, 2000·Anesthesia and Analgesia·D M EckmannA T Cheung
Jun 14, 2001·Artificial Organs·G W BurgreenA J Holmes
Jun 14, 2001·Artificial Organs·J ApelH Reul
Jun 5, 2003·Artificial Organs·Reinhard PaulHelmut Reul
Jul 11, 2003·European Journal of Cardio-thoracic Surgery : Official Journal of the European Association for Cardio-thoracic Surgery·S SalzbergM Turina
Jun 23, 2005·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Lei Gu, William A Smith
Jun 29, 2005·Artificial Organs·Arash ArvandHelmut Reul
Dec 3, 2005·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Amy L ThrockmortonDon B Olsen
Dec 13, 2005·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Alexandrina UntaroiuDon B Olsen
Jun 23, 2007·Artificial Organs·Leok Poh ChuaTongming Zhou
Mar 22, 2008·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Yan ZhangDong-Hai Jin
Nov 26, 2009·Circulation·Stuart D RussellUNKNOWN HeartMate II Clinical Investigators
Jul 16, 2010·Artificial Organs·M Ertan TaskinZhongjun J Wu
Apr 27, 2011·Artificial Organs·Xiao-Chen YangSheng-Shou Hu
Jun 27, 2013·Seminars in Thoracic and Cardiovascular Surgery·Ezequiel J Molina, Steven W Boyce
Sep 30, 2014·The International Journal of Artificial Organs·Po-Lin HsuUlrich Steinseifer
Mar 11, 2015·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Nandan K MondalZhongjun J Wu
Oct 22, 2016·The Annals of Thoracic Surgery·J Trent MagruderAshish S Shah