Apparatus and method for determining respiratory effort from mus

Surgery – Truss – Pad

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A61B 50205

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active

059133082

ABSTRACT:
An apparatus for determining the respiratory effort of a patient is disclosed. The apparatus includes a device for acquiring electrocardiographic (ECG) signal (e.g., conventional electrocardiogram (ECG) signal) that contains pure cardiac signal and respiratory muscle tremor (RMT) signal. The apparatus also includes a processor for processing the ECG signal. The processor includes a filter to filter the ECG signal for reducing the cardiac signal, a device for determining a waveform representing the magnitude of the oscillations in the filtered ECG signal, and a mechanism for smoothing spikes in the waveform. The resulting waveform is related to the respiratory muscle tremor, which is related to the respiratory effort. The estimation of the respiratory effort is derived entirely from the ECG signal.

REFERENCES:
Khaled, et al., "First Approach for Respiratory Monitoring by Amplitude Demodulation of the Electrocardiogram", Oct. 29-Nov. 1, 1992, IEEE Engineering in Medicine and Biology 14th Annual Conference, Paris, France, pp. 2535-2536.
Varanini, et al., "Adaptive Filtering of ECG Signal For Deriving Respiratory Activity", 1990, IEEE Proceedings: Computers In Cardiology, pp. 621-624.
McFarlane, "Lead Systems", 1989, Comprehensive Electrocardiology: Theory and Practice in Health and Disease, vol. 1, Pergamon Press, New York, pp. 315-351.
Pinciroli, et al, "Processing Electrocardiograms Towards Respiratory Signals", IEEE Engineering In Medicine & Biology Society 10th Annual International Conference, pp. 139-140.
Atwood, et al., "High-frequency Electrocardiography: An Evaluation of lead Placement and Measurements", Apr. 25, 1988, Cardiac Catheterization Laboratory, Long Beach VA Medical Center, pp. 733-739.
Amoore, et al., "Respiration and the ECG: A Study Using Body Surface Potential Maps", 1988, J. Electrocardiology, vol. 21(3), pp. 268-271.
Pinciroli, et al.,"Remarks and Experiments on the Construction of Respiratory Waveforms from Electrocardiographic Tracings", 1986, Computers and Biochemical Research, 19, pp. 391-409.
Moody, et al., "Derivation of Respiratory Signals From Multi-lead ECGs", Sep. 8-12, 1985, Computers in Cardiology, Linkoping, Sweden.
Pinciroli, et al., "Detection of Electrical Axis Variation For the Extraction of Respiratory Information", Sep. 8-12, 1985, Computers in Cardiology, Linkoping, Sweden.

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