Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1996-11-22
1998-11-17
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
128901, A61N 1362
Patent
active
058369805
ABSTRACT:
A circuit and process for an active implantable medical device, particularly a cardiac type pacemaker or defibrillator of the "demand" type, for discrimination between parasitic signals and characteristic signals. Such a device includes a detection circuit (10) to collect a cardiac signal (SA), which may be a spontaneous or stimulated cardiac signal, of the bearer of the device. The collected cardiac signal includes a characteristic signal component and undesirable parasitic signal component. The device also includes a discriminating circuit (12-18) and technique for receiving as an input the collected cardiac signal and delivering at an output a signal (ST) desirably corresponding essentially to the characteristic signal, from which any parasitic signals have been removed. The discrimination circuit and technique include a differentiating circuit (14) to provide successive values of the slope of the actual collected cardiac signal, and a comparator circuit (18) to compare the slope values to a reference discriminating slope values to remove parasitic signals from the collected cardiac signals. In the case that the variation thus evaluated is in a range between predetermined negative and positive limits, the variation is left unchanged. In the opposite case, the cardiac signal variation is limited to a predetermined value, respectively positive (PSC) or negative (PSD). Thus, the limited variation follows the actual cardiac signal, and by subtracting the processed signal (which is limited or nonlimited) from the actual signal, the difference yields the characteristic signals.
REFERENCES:
patent: 3848586 (1974-11-01), Suzuki et al.
patent: 4516579 (1985-05-01), Irnich
patent: 4537201 (1985-08-01), Delle-Vodove et al.
patent: 5339820 (1994-08-01), Henry et al.
patent: 5370124 (1994-12-01), Dissing et al.
patent: 5456263 (1995-10-01), Andersen
ELA Medical S.A.
Evanisko George R.
Kamm William E.
LandOfFree
Methods and apparatus for discriminating characteristic signals does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for discriminating characteristic signals , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for discriminating characteristic signals will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-879711