A Wavelet Approach to Detecting Electrocautery Noise in the ECG

TitleA Wavelet Approach to Detecting Electrocautery Noise in the ECG
Publication TypeConference Paper
Year of Publication2005
AuthorsBrouse, C., G. Dumont, F. Herrmann, and J. M. Ansermin
Conference NameEngineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Pagination788 -792
Date Publishedjan.
Keywordsclinical monitoring expert system, decision making, ECG, electrocardiogram, Electrocardiography, electrocautery noise, medical expert systems, medical signal processing, noise, patient monitoring, wavelet, wavelet transforms

A software approach has been developed for detecting electrocautery noise in the electrocardiogram (ECG) using a wavelet decomposition of the signal. With this approach, a clinical monitoring expert system can be forewarned of potential artefacts in trend values derived from the ECG, allowing it to proceed with caution when making decisions based on these trends. In 15 operations spanning 38.5 hours of ECG data, we achieved a false positive rate of 0.71% and a false negative rate of 0.33%. While existing hardware approaches detect the source of the noise without any ability to assess its impact on the measured ECG, our software approach detects only the presence of noise in the signal itself. Furthermore, the software approach is cheaper and easier to implement in a clinical environment than existing hardware approaches


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