Evaluation of a morphological filter in mean cardiac output determination: application to left ventricular assist devices

Stevens, Michael Charles, Bradley, Andrew P., Wilson, Stephen J. and Mason, David Glen (2013) Evaluation of a morphological filter in mean cardiac output determination: application to left ventricular assist devices. Medical and Biological Engineering and Computing, 51 8: 891-899. doi:10.1007/s11517-013-1061-6


Author Stevens, Michael Charles
Bradley, Andrew P.
Wilson, Stephen J.
Mason, David Glen
Title Evaluation of a morphological filter in mean cardiac output determination: application to left ventricular assist devices
Journal name Medical and Biological Engineering and Computing   Check publisher's open access policy
ISSN 0140-0118
1741-0444
Publication date 2013-08
Sub-type Article (original research)
DOI 10.1007/s11517-013-1061-6
Volume 51
Issue 8
Start page 891
End page 899
Total pages 9
Place of publication Germany
Publisher Springer
Collection year 2014
Language eng
Formatted abstract
A morphological filter (MF) is presented for the determination of beat-to-beat mean rotary left ventricular assist device (LVAD) flow rate, measured using an implanted flow probe. The performance of this non-linear filter was assessed using LVAD flow rate (QLVAD) data sets obtained from in silico and in vivo sources. The MF was compared with a third-order Butterworth filter (BWF) and a 10-s moving average filter (MAF). Performance was assessed by calculating the response time and steady state error across a range of heart rates and levels of noise. The response time of the MF was 3.5 times faster than the MAF, 0.5 s slower than the BWF, and had a steady state error of 2.61 %. It completely removed pulsatile signal components caused by residual ventricular function, and tracked sharp transient changes in QLVAD better than the BWF. The use of a two-stage MF improved the noise immunity compared to the single-stage MF. This study showed that the good performance characteristics of the non-linear MF make it a more suitable candidate for embedded real-time processing of QLVAD than linear filters.
Keyword Morphological filter
Ventricle assist device
Cardiac output
Signal processing
System
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Information Technology and Electrical Engineering Publications
 
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