轴流血泵最佳左心辅助下的速度变化及内流场分析

Translated title of the contribution: Analysis of speed and internal flow field of axial flow blood pump in optimal left heart assistance

Teng Jing, Lingyu Gu, Fangqun Wang, Zhaoming He

Research output: Contribution to journalArticlepeer-review

Abstract

In order to solve the phenomenon of suction or regurgitation under constant pressure or constant speed assistance of axial flow blood pump, the self-developed aortic valve axial flow blood pump was taken as the research object to establish the multi-scale parametric model with "axial flow blood pump-blood circulation system" in series coupling, which presents the curve of the rotating speed reaching the optimal assisted state under the condition of heart failure at all levels. Compared to constant speed assistance, the hemodynamic results obtained by the variable speed assistance were more fitted to the normal heart. CFD technology was used to compare and analyze the internal flow field of two auxiliary states in one cardiac cycle under grade Ⅳ heart failure. It is found that under the assistance of variable speed, the axial flow blood pump produces obvious eddy current in the isovolumic systolic period, isovolumic diastolic period and filling period, and the flow passage time is longer, but the shear stress is smaller, and hemolysis will not be produced. During the ejection period, the variable speed assistance flow is more stable, and no vortex is generated, but its shear stress is higher than the critical value of 500 Pa in the time period of 0.10 s and hemolysis does not occur.

Translated title of the contributionAnalysis of speed and internal flow field of axial flow blood pump in optimal left heart assistance
Original languageChinese (Simplified)
Pages (from-to)775-780
Number of pages6
JournalPaiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering
Volume38
Issue number8
DOIs
StatePublished - Aug 28 2020

Keywords

  • Axial flow blood pump
  • CFD simulation
  • Multi-scale model
  • Variable speed assistance

Fingerprint

Dive into the research topics of 'Analysis of speed and internal flow field of axial flow blood pump in optimal left heart assistance'. Together they form a unique fingerprint.

Cite this