Numerical simulation of the flow field of a ventricular assist pump (Luo-Ye pump)

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Author:
XIAO Xue-jun(Department of Cardiovascular Surgery, Guangdong Provincial People's Hospital, Guangdong Provincial Cardiovascular Institute, Guangzhou 510100, China)
DU Song-lin()
WU Yue-heng()
CEN Ren-jing()
QIU Lin()
LIN Jiang-guo()
CHENG An-heng(Department of Cardiovascular Surgery, Guangdong Provincial People's Hospital, Guangdong Provincial Cardiovascular Institute, Guangzhou 510100, China)
Journal Title:
CHINESE JOURNAL OF BIOMEDICAL ENGINEERING
Issue:
Volume 16, Issue 04, 2010
DOI:
10.3760/cma.j.issn.1674-1927.2010.04.002
Key Word:
Computer-aided design;Assisted circulation;Microfluidics;Luo-Ye pump;Berlin Heart pump

Abstract: Objective To study the flow field of Luo-Ye (L-Y) pump, a ventricular assist pump,and to compare it with Berlin Heart (B-H) pump. Methods In this study, computational fluid dynamics (CFD) was adopted to study the flow fields of L-Y pump (80 ml)and B-H pump(80 ml). Between two types of pump, a comparison was made of their typical cross sections in their streamline and pressure distribution charts. Results By streamline charts, continuous streamline flow was demonstrated during early diastole,and steadily involved in a coherent spiral vortex during mid-diastole in L-Y pump. In B-H pump, similar streamline flow was observed during early diastole while the vortex was not formed during mid-diastole. At systole, blood efflux was found in both pumps, with even distribution of streamlines in L-Y pump due to its cross design and somewhat less even streamline distribution in B-H pump owing to the parallel structure of its outlet and inlet. The pressure distribution charts showed a number of local low-pressure areas during diastole in B-H pump but only one in L-Y pump. Similar pressure distribution during systole was found in both L-Y and B-H pumps. Maximum speed of L-Y pump and B-H pump was 0.472 m/s and 0.486 m/s during early diastole; 1.33 m/s and 1.34 m/s during middle systole. Conclusions L-Y pump may favorably preserve a linear flow field as well as rational distribution of streamlines and pressure, in contrast to frequent occurrence of small turbulence at outlet and inlet, as well as less even distribution of pressure seen with B-H pump.

  • [1]Chen CZ,Ye CX.Study on mechanical circulatory support and currently available supporting parts in China.Artif Organ,2006,30:510-513.
  • [2]Ye CX,Umezu M,Nugent AH,et al.Invitro and invivo evaluation of the antithrombogenic properties of the spiral vortex pump for temporary left heart bypass.Perfusion,1991,6:123-129.
  • [3]Ye CX,Umezu M,Nugent AH,et al.The spiral vortex pump:Design concept,flow pattern characteristic and results of invitro tests.Artif Organs.1990,14:46-49.
  • [4]叶椿秀,梅津光生,中村孝夫,等.搏动辅助血泵的设计构思与实践--从旋涡泵到罗叶泵.中国胸心血管外科临床杂志,2002,9:35-40.
  • [5]Song X,Wood HG,Day SW,et al.Studies of turbulence models in a computational fluid dynamics model of a blood pump.Artif Organs,2003,27:935-937.
  • [6]Yamane Y,Miyamoto Y,Taijima K,et al.A comparative study between flow visualization and computational fluid dynamic analysis for the Sun Medical centrifugal blood pump.Artif Organs,2004,28:458-466.
  • [7]Medvitz RB,Kreider JW,Manning KB,et al.Development and validation of a computational fluid dynamics methodology for simulation of pulsatile left ventricular assist devices.ASAIO J,2007,53:122-131.
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