Surgery – Truss – Pad
Patent
1980-08-25
1982-08-03
Kamm, William E.
Surgery
Truss
Pad
A61B 504
Patent
active
043423183
ABSTRACT:
Apparatus for processing waveform signals of physiological origin. The apparatus includes circuitry for developing a signal representative of the peak-to-peak amplitude between each waveform signal peak and the next successive waveform signal peak as well as circuitry for developing a signal representative of the slew rate of the waveform signal between successive waveform signal peaks. In a preferred embodiment, developed signals are stored in resettable memories, the memories being reset on the occurrence of a sign or polarity change in the slope of the waveform signal. Sampling circuitry is provided for establishing a maximum peak-to-peak amplitude within the waveform signal as well as its associated slew rate. Within the context of an ECG, the maximum peak-to-peak amplitude and associated slew rate represent the QRS complex and the apparatus of the present invention may be employed within a pacemaker as a sense amplifier. Alternatively, the apparatus of the present invention may be employed to determine whether or not a pacing lead is properly placed and the pacemaker is suitable for application to the patient.
REFERENCES:
patent: 3606882 (1971-09-01), Abe et al.
patent: 3611164 (1971-10-01), Day
patent: 3698386 (1972-10-01), Fried
patent: 3878833 (1975-04-01), Arneson
patent: 3902479 (1975-09-01), Chaumet
patent: 3946725 (1976-03-01), Bolshov et al.
patent: 4250881 (1981-02-01), Grosskopf
Engle William R.
Rockland Ronald H.
Kamm William E.
Medtronic Inc.
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