DocumentCode :
591302
Title :
Suppression of the respiration artefact and extraction of the cardiac component in the thoracic impedance recorded through defibrillation pads
Author :
Alonso, E. ; Aramendi, Elisabete ; Ruiz, Juan-Carlos ; Ayala, Unai ; Gonzalez-Otero, Digna
Author_Institution :
Univ. of the Basque Country UPV/EHU, Bilbao, Spain
fYear :
2012
fDate :
9-12 Sept. 2012
Firstpage :
677
Lastpage :
680
Abstract :
Circulation detection by checking the carotid pulse in cardiac arrest patients during cardiopulmonary resuscitation (CPR) has been reported inaccurate. Thoracic impedance (TI) measured via the defibrillator pads has been recently proposed for the assessment of circulation during CPR. However, ventilation artefacts severely corrupt and spectrally overlap the cardiac component of the TI. This study proposes an adaptive scheme to suppress respiration artefacts and extract the circulation component from the TI recorded through the defibrillation pads. The database consisted of 12 records from hemodynamically stable volunteers including the TI and the ECG. Each record contained intervals without respiration and intervals with 5 respiration rates. R-R intervals detected in the ECG were used to estimate the instantaneous frequency of the cardiac component of the TI. An adaptive scheme was applied to estimate the amplitude and phase of the three-harmonic model of the cardiac component. The method was evaluated in terms of signal-to-noise ratio (SNR) improvement, and in terms of the normalized cross correlation coefficient of the circulation components obtained during respiration and in artefact-free intervals.
Keywords :
bioelectric potentials; defibrillators; electrocardiography; feature extraction; frequency estimation; haemodynamics; medical signal processing; pneumodynamics; ECG; R-R intervals; artefact-free intervals; cardiac arrest patients; cardiac component; cardiopulmonary resuscitation; carotid pulse; circulation detection; database; defibrillation pads; electrocardiography; hemodynamically stable volunteers; instantaneous frequency estimation; normalized cross correlation coefficient; respiration artefact extraction; respiration artefact suppression; signal-to-noise ratio; thoracic impedance recording; three-harmonic model; ventilation artefacts; Cardiac arrest; Correlation; Electrocardiography; Heart beat; Impedance; Signal to noise ratio; Ventilation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computing in Cardiology (CinC), 2012
Conference_Location :
Krakow
ISSN :
2325-8861
Print_ISBN :
978-1-4673-2076-4
Type :
conf
Filename :
6420484
Link To Document :
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