Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1997-06-17
1999-09-28
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 1385
Patent
active
059579579
ABSTRACT:
A method of and apparatus for pacing a patient's heart at a pacing rate dependent on patient activity and posture particularly during stair climbing. A dual chamber, rate responsive pacemaker for pacing a patient's heart includes at least one DC accelerometer mounted in the pacemaker pulse generator for implantation such that the sensitive axis of the DC accelerometer is sensitive to the effects of gravity during forward lean of the patient characteristic of stair climbing posture. The DC and AC signal outputs of the accelerometer are processed to develop a tilt signal and an activity signal. A target rate control signal is derived from the activity signal dependent on the level of activity. A stair climbing rate is selected for controlling the physiologic pacing rate between a lower and an upper pacing rate in the presence of an activity signal indicative of a patient walking rate and a tilt signal value falling within a tilt window. The target rate control signal is used to control the pacing rate if the activity signal is indicative of faster patient movement, e.g. running, or if the tilt signal is outside the tilt window indicating that the patient is either upright or prone.
REFERENCES:
patent: 4257423 (1981-03-01), McDonald et al.
patent: 4374382 (1983-02-01), Markowitz
patent: 4428378 (1984-01-01), Anderson et al.
patent: 4556063 (1985-12-01), Thompson et al.
patent: 4771780 (1988-09-01), Sholder
patent: 4846195 (1989-07-01), Alt
patent: 4869251 (1989-09-01), Lekholm
patent: 5010893 (1991-04-01), Sholder
patent: 5031618 (1991-07-01), Mullet
patent: 5233984 (1993-08-01), Thompson
patent: 5354317 (1994-10-01), Alt
Airbags Boom When IC Accelerometer Sees 50 G Electronic Design Aug. 8, 1991.
A New Mechanical Sensor for Detectin body Activity and Posture, Sduitable Rate Responsive Pacing Eckhard Alt Nov. 1988 vol. 11.
Activity-Based Pacing: Comprarison of a Devce Using Accelerometer Versus A Piezoelectric Crystal David W. Bacharach et al Pace vol. 15 Feb. 1992.
Kamm William E.
Medtronic Inc.
LandOfFree
Rate responsive cardiac pacemaker with tilt sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rate responsive cardiac pacemaker with tilt sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rate responsive cardiac pacemaker with tilt sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-697189