NDLI: Real-time cardiorespiratory coherence detects antinociception during general anesthesia

Content Provider	IEEE Xplore Digital Library
Author	Brouse, C.J. Karlen, W. Dumont, G.A. Myers, D. Cooke, E. Stinson, J. Lim, J. Ansermino, J.M.
Copyright Year	2012
Description	Author affiliation: Dept. of Pediatric Anesthesia, BC Children's Hosp., Vancouver, BC, Canada (Myers, D.; Cooke, E.; Stinson, J.; Lim, J.; Ansermino, J.M.) \|\| Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada (Brouse, C.J.; Karlen, W.; Dumont, G.A.)
Abstract	Heart rate variability (HRV) may provide anesthesiologists with a noninvasive tool for monitoring nociception during general anesthesia. A novel real-time cardiorespiratory coherence (CRC) algorithm has been developed to analyze the strength of linear coupling between heart rate (HR) and respiration. CRC values range from 0 (low coherence, strong nociception) to 1 (high coherence, no nociception). The algorithm uses specially designed filters to operate in real-time, minimizing computational complexity and time delay. In the standard HRV high frequency band of 0.15 - 0.4 Hz, the real-time delay is only 5.25 - 3.25 s. We have assessed the algorithm's response to 60 anesthetic bolus events (a large dose of anesthetics given over a short time; strongly antinociceptive) recorded in 47 pediatric patients receiving general anesthesia. Real-time CRC responded strongly to bolus events, changing by an average of 30%. For comparison, three traditional measures of HRV (LF/HF ratio, SDNN, and RMSSD) responded on average by only 3.8%, 14%, and 3.9%, respectively. Finally, two traditional clinical measures of nociception (HR and blood pressure) responded on average by only 3.9% and 0.91%, respectively. CRC may thus be used as a real-time nociception monitor during general anesthesia.
Sponsorship	IEEE Eng. Medicine Biol. Soc.
Starting Page	3813
Ending Page	3816
File Size	331945
Page Count	4
File Format	PDF
ISBN	9781424441198
ISSN	1557170X
e-ISBN	9781457717871
DOI	10.1109/EMBC.2012.6346798
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Real-time systems Coherence Algorithm design and analysis Delay Anesthesia Heart rate variability
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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