Title :
A novel method for the detection of apnea and hypopnea events in respiration signals
Author :
Várady, Péter ; Micsik, Tamás ; Benedek, Sándor ; Benyó, Zoltán
Author_Institution :
Lab. of Med. Informatics, Budapest Univ. of Technol. & Econ., Hungary
Abstract :
The monitoring of breathing dynamics is an essential diagnostic tool in various clinical environments, such as sleep diagnostics, intensive care and neonatal monitoring. This paper introduces an innovative signal classification method that is capable of on-line detection of the presence or absence of normal breathing. Four different artificial neural networks are presented for the recognition of three different patterns in the respiration signals (normal breathing, hypopnea, and apnea). Two networks process the normalized respiration signals directly, while another two use sophisticatedly preprocessed signals. The development of the networks was based on training sets from the polysomnographic records of nine different patients. The detection performance of the networks was tested and compared by using up to 8000 untrained breathing patterns from 16 different patients. The networks which classified the preprocessed respiration signals produced an average detection performance of over 90%. In the light of the moderate computational power used, the presented method is not only viable in clinical polysomnographs and respiration monitors, but also in portable devices.
Keywords :
medical signal detection; medical signal processing; neural nets; patient monitoring; pneumodynamics; sleep; average detection performance; hypopnea events; intensive care; neonatal monitoring; normal breathing; polysomnography; portable devices; respiration monitoring; respiration monitors; respiration signals; sleep apnea; sleep diagnostics; sophisticatedly preprocessed signals; untrained breathing patterns; Biomedical informatics; Biomedical monitoring; Control engineering; Event detection; Humans; Information technology; Power generation economics; Signal processing; Sleep apnea; Synthetic aperture sonar; Algorithms; Apnea; Databases, Factual; Evaluation Studies as Topic; Humans; Models, Statistical; Neural Networks (Computer); Polysomnography; Reproducibility of Results; Sensitivity and Specificity; Signal Processing, Computer-Assisted; Sleep Apnea Syndromes;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2002.802009