ORBi: Stevenson D. J. - Processing aortic and pulmonary artery waveforms to derive the ventricle time-varying elastance

Reference : Processing aortic and pulmonary artery waveforms to derive the ventricle time-varying el...


	Document type :	Scientific congresses and symposiums : Paper published in a journal
	Discipline(s) :	Engineering, computing & technology : Multidisciplinary, general & others
	To cite this reference:	http://hdl.handle.net/2268/132099

Title :	Processing aortic and pulmonary artery waveforms to derive the ventricle time-varying elastance
Language :	English
Author, co-author :	Stevenson, D. J. [Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand]
	Hann, C. E. [Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand]
	Chase, G. J. [Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand]
	Revie, J. [Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand]
	Shaw, G. M. [Department of Intensive Care, Christchurch Hospital, Christchurch, New Zealand]
	Desaive, Thomas [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Thermodynamique des phénomènes irréversibles >]
	LAMBERMONT, Bernard [Centre Hospitalier Universitaire de Liège - CHU > > Frais communs médecine >]
	GHUYSEN, Alexandre [Centre Hospitalier Universitaire de Liège - CHU > > Urgences >]
	Kolh, Philippe [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Biochimie et physiologie générales, humaines et path. >]
	Heldmann, S. [Department of Mechanical Engineering, TU Darmstadt, Germany]
Publication date :	2011
Journal title :	IFAC Proceedings Volumes (IFAC-PapersOnline)
Volume :	18
Issue/season :	PART 1
Pages :	587-592
Audience :	International
ISSN :	14746670
Event name :	18th IFAC World Congress
Event date :	28 August 2011 through 2 September 2011
Event place (city) :	Milano
Keywords :	[en] Cardiovascular system ; Intensive Care Unit ; Model-based cardiac diagnosis ; Porcine model ; Pressure waveform ; Signal Processing ; Time-varying elastance
Abstract :	[en] Time-varying elastance of the ventricles is an important metric both clinically and as an input for a previously developed cardiovascular model. However, currently time-varying elastance is not normally available in an Intensive Care Unit (ICU) setting, as it is an invasive and ethically challenging metric to measure. A previous paper developed a method to map less invasive metrics to the driver function, enabling an estimate to be achieved without invasive measurements. This method requires reliable and accurate processing of the aortic and pulmonary artery pressure waveforms to locate the specific points that are required to estimate the driver function. This paper details the method by which these waveforms are processed, using a data set of five pigs induced with pulmonary embolism, and five pigs induced with septic shock (with haemofiltration), adding up to 88 waveforms (for each of aortic and pulmonary artery pressure), and 616 points in total to locate. 98.2% of all points were located to within 1% of their true value, 0.81% were between 1% and 5%, 0.65% were between 5% and 10%, the remaining 0.32% were below 20%.© 2011 IFAC.
Permalink :	http://hdl.handle.net/2268/132099
DOI :	10.3182/20110828-6-IT-1002.02661
Commentary :	86642 9783902661937

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Open access	Processing aortic and pulmonary artery waveforms to derive the ventricle time-varying elastance -FINAL.pdf		Author postprint	431.79 kB	View/Open

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