Estimation of Coupled Assist Flows in a Moving-Actuator Bi-Ventricular Assist Device using Interventricular Pressure-Reference-Cited by-同舟云学术

Estimation of Coupled Assist Flows in a Moving-Actuator Bi-Ventricular Assist Device using Interventricular Pressure

Published:2003-08 Issue:8 Volume:26 Page:758-763
ISSN:0391-3988
Container-title:The International Journal of Artificial Organs
language:en
Short-container-title:Int J Artif Organs

Author:

Choi J.¹,Park J.W.²,Jo Y.H.²,Lee J.J.²,Kim W.E.²,Park C.Y.²,Kim J.¹,Min B.G.³⁴

Affiliation:

1. Korea Artificial Organ Center, Korea University, Seoul - Korea

2. Interdisciplinary Program in Medical and Biological Engineering Major, Graduate School, Seoul National University, Seoul - Korea

3. Institute of Medical and Biological Engineering, Medical Research Center, Seoul National University, Seoul - Korea

4. Department of Biomedical Engineering, College of Medicine, Seoul National University, Seoul - Korea

Abstract

An assist flow estimation scheme for a moving-actuator biventricular assist device (MA-BVAD) using interventricular pressure (IVP) has been developed. The scheme uses a waveform feature parameter of IVP, peak IVP time (PIT), for estimation of the filling volumes of both left and right blood sacs simultaneously. In a regression analysis on data from an in vivo test in an 85 Kg male calf for 20 days, the PIT was found to have high correlation with the blood sac filling volume (R=0.883: left filling volume, R=0.967: right filling volume). A conceptual equation hypothesizing this correlation between PIT and filling volume was established based on the observation and the unknown parameters were identified using least squares parameter optimization. The estimation equation identified proved highly accurate (R=0.916 for left flow, R=0.970 for right flow). The accuracy of the estimation scheme promises very good practical applicability.

Publisher

SAGE Publications

Subject

Biomedical Engineering,Biomaterials,General Medicine,Medicine (miscellaneous),Bioengineering

Link

http://journals.sagepub.com/doi/pdf/10.1177/039139880302600809

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