In vivo evaluation of pressure head and flow rate estimation on a continuous-flow artificial heart

A. Tanaka, Y. Aizawa, M. Yoshizawa, P. Olegario, K. Abe, H. Takeda, T. Yambe, S. Nitta

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

For monitoring or control of a fully implantable TAH, we should avoid using special sensors that may lose reliability and biocompatibility. Instead of direct measurement of pressure head and flow rate of a centrifugal blood pump, the authors previously proposed a method of estimating these measurements. The method uses an auto-regressive exogenous (ARX) model whose inputs are supplied power, rotational speed and the gain constant expressing the relationship between the two. The gain constant was introduced to compensate for reduction in accuracy caused by the change in blood viscosity or vascular dynamics. In this study, to ascertain the adequacy of the proposed method, an acute animal experiment was carried out using an adult goat equipped with a TAH consisting of two centrifugal pumps. The results indicated that the ARX model identified even in a mock circulation could estimate flow rate in the recipient accurately enough, although estimation accuracy of pressure head was not high.

Original languageEnglish
Pages (from-to)1573-1574
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume2
Publication statusPublished - 2002
EventProceedings of the 2002 IEEE Engineering in Medicine and Biology 24th Annual Conference and the 2002 Fall Meeting of the Biomedical Engineering Society (BMES / EMBS) - Houston, TX, United States
Duration: 2002 Oct 232002 Oct 26

Keywords

  • ARX model
  • Artificial heart
  • Continuous-flow pump
  • Estimation
  • Flow rate
  • Pressure head

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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