Title :
Detection and quantification of venous air embolism by wavelet analysis of Doppler heart sound
Author :
Chan, Francis H Y ; Chan, Brent C B ; Lam, F.K. ; Poon, Paul W F ; Lui, P.W. ; Wang, H.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong
fDate :
31 Oct-3 Nov 1996
Abstract :
The wavelet analysis of the Doppler heart sound detected under controlled venous air embolism at sub-clinically and clinically significant volumes was studied in anaesthetized dogs. Signal processing with wavelet enhances the Dower of embolic signal and facilitates the simple detection and extraction of embolic heart beats by thresholding. The cumulative power of the extracted embolic heart beats is found to be linearly related to the volume of embolic air on the log-log scale, suggesting that it is feasible to estimate clinically significant volume of embolic air in human subjects by linearly extrapolating from sub-clinical embolic volumes
Keywords :
Doppler measurement; acoustic signal processing; bioacoustics; cardiology; medical signal processing; wavelet transforms; Doppler heart sound wavelet analysis; anaesthetized dogs; clinically significant volume; embolic heart beats extraction; human subjects; linear extrapolation; log-log scale; subclinical embolic volumes; venous air embolism detection; Acoustical engineering; Dogs; Electrocardiography; Heart beat; Humans; Physiology; Signal analysis; Signal processing; Veins; Wavelet analysis;
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
DOI :
10.1109/IEMBS.1996.652689
