Title :
Frequency and Time-Frequency Based Indices For Suction Detection in Rotary Blood Pumps
Author :
Ferreira, A. ; Simaan, M.A. ; Boston, J.R. ; Antaki, J.F.
Author_Institution :
Dept. of Electr. Eng., Pittsburgh Univ., PA
Abstract :
A new suction detection system for rotary blood pumps used in left ventricular assist devices is presented. The system is based on frequency indices combined with a time-frequency extraction feature algorithm. The frequency based indices can detect the changes in the harmonic and subharmonic energy content of the pump flow signal, when a suction event is occurring. The time-frequency extraction feature algorithm can track variations in the standard deviation of the instantaneous frequency of that signal. These two pieces of information are then combined in a weighted decision system to generate a suction alarm. The proposed system has been tested in simulations, in a mock-loop system, and in-vivo tests and produced very satisfactory results
Keywords :
biomedical equipment; feature extraction; haemodynamics; medical signal processing; patient care; patient treatment; signal detection; frequency based indices; harmonic energy content; in-vivo tests; left ventricular assist devices; mock-loop system; pump flow signal; rotary blood pumps; subharmonic energy content; suction detection system; time-frequency based indices; time-frequency extraction feature algorithm; Biomedical engineering; Blood; Contracts; Data mining; Event detection; Feature extraction; Heart; Pattern analysis; System testing; Time frequency analysis;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on
Conference_Location :
Toulouse
Print_ISBN :
1-4244-0469-X
DOI :
10.1109/ICASSP.2006.1660530
