Diaphragm electromyography analysis method and system

Details Diaphragm electromyography analysis method and system Diaphragm electromyography analysis method and system

1995-03-31

1997-09-30

Rimell, Sam

Surgery

Truss

Pad

128777, A61B 504

Patent

active

056717520

ABSTRACT:
In the method and system for electromyographic analysis of a striated muscle, electromyographic signals produced by the muscle are detected by means of an array of electrodes passing through the center of the muscle depolarizing region. Each electromyographic signal comprises an electromyographic component and a noise component. The position of the center of the muscle depolarizing region is then determined by detecting a reversal of polarity of the electromyographic components of the signals. Finally, two signals of opposite polarities amongst the electromyographic signals are subtracted. The subtraction subtracts the noise components of the two signals from each other but adds the electromyographic components of the two signals together to produce an electromyographic signal of improved signal-to-noise ratio. Advantageously, the array of electrodes is a linear array of successive electrodes, the center of the muscle depolarizing region is located between the electrodes of a given pair of successive electrodes, and the two signals of opposite polarities detected through the two pairs of successive electrodes adjacent to the given pair on opposite sides thereof are subtracted.

REFERENCES:
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patent: 5212476 (1993-05-01), Moloney
patent: 5349963 (1994-09-01), Eskelinen
"The Role of the Human Diaphragm Configuration on the EMG Centre Frequency" Ruiz-Neto, P.P. 1993 ALA/ATS International Conference.
"The Role of Diaphragmatic Recruitment in EMG Signal Analysis" Weinberg, J. 1993 ALA/ATS International Conference.
"Automatic EMG Selection for Muscle Fatigue Diagnosis" Sinderby, C. 1993 ALA/ATS International Conference.
"Effect of Esophageal Electrode Distance from the Diaphragm on EMG Center Frequency" Beck, J. 1993 ALA/ATS International Conference.
"The Influence of Innervation Zones of Esophageal Recordings of Diaphragmatic EMG" Beck, J. 1994 ALA/ATS International Conference.
"Effect of Chest Wall Configuration on Esophageal Recordings of Diaphragm EMG" Beck, J. 1994 ALA/ATS International Conference.
"Effects of Chest Wall Configuration and Electrode Positioning on Human Diaphragmatic EMG" Beck, J. 1994 A Thesis submitted to the Faculty of Graduate Studies and Research.

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