Surgery – Truss – Pad
Patent
1986-09-22
1988-06-21
Kamm, William E.
Surgery
Truss
Pad
128696, 364417, A61B 504, G06F 1542
Patent
active
047519312
ABSTRACT:
An apparatus and method for detecting low level bioelectric signals on the surface of a patient. The bioelectric signals are enhanced by filtering out noise through a particular adaptive filtering technique. In detecting His signals at the chest of a patient, surface ECG's are acquired at a plurality of external locations, the acquired data is digitized and stored. One of the ECG signals is selected as a reference channel and the remaining ECG signals are used as input channels. With the use of a feedback coefficient, each data point of interest in each cycle is adaptively filtered to remove the noise and the filtered signal is displayed. The adaptive filtering involves performing two pre-updates of a weight matrix associated with each sample point of each input channel based on the measured samples before and after a sample point, calculating an output signal based on the weight matrix and the input channel, and updating the weight matrices based on the calculated output signal.
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Briller Stanley A.
Cano Gerald G.
Allegheny-Singer Research Institute
Kamm William E.
Manuel George
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