Slow gain control

Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

128708, 128901, A61N 139

Patent

active

056626886

ABSTRACT:
A system and method automatically controls a gain of a cardioverter/defibrillator which receives electrical activity of the heart and delivers shock pulses in response thereto. An amplifier amplifies the electrical activity according to a variable gain. A detection circuit detects depolarizations in the amplified electrical activity and provides a detect signal representing a cardiac event indicative of a depolarization when the amplified electrical activity exceeds a sensitivity threshold. A storage device stores peak history information representative of peak values of the amplified electrical activity of a first selected number (N) of cardiac events. Slow gain control circuitry adjusts the variable gain in discrete steps based on the stored peak history information.

REFERENCES:
patent: 3590811 (1971-07-01), Harris
patent: 3878833 (1975-04-01), Arneson et al.
patent: 3927677 (1975-12-01), Goebeli et al.
patent: 3939824 (1976-02-01), Arneson et al.
patent: 3986496 (1976-10-01), Brastad
patent: 3999556 (1976-12-01), Alferness
patent: 4000461 (1976-12-01), Barber et al.
patent: 4226245 (1980-10-01), Bennett, Jr.
patent: 4240442 (1980-12-01), Andresen et al.
patent: 4250883 (1981-02-01), Thompson
patent: 4325384 (1982-04-01), Blaser et al.
patent: 4617938 (1986-10-01), Shimoni et al.
patent: 4665919 (1987-05-01), Mensink et al.
patent: 4708144 (1987-11-01), Hamilton et al.
patent: 4722351 (1988-02-01), Phillipps et al.
patent: 4766902 (1988-08-01), Schroeppel
patent: 4768511 (1988-09-01), DeCote, Jr.
patent: 4779617 (1988-10-01), Whigham
patent: 4819643 (1989-04-01), Menken
patent: 4827934 (1989-05-01), Ekwall
patent: 4880004 (1989-11-01), Baker, Jr. et al.
patent: 4903699 (1990-02-01), Baker, Jr. et al.
patent: 4934376 (1990-06-01), Armington
patent: 4940054 (1990-07-01), Grevis et al.
patent: 4966146 (1990-10-01), Webb et al.
patent: 4967747 (1990-11-01), Carroll et al.
patent: 4972835 (1990-11-01), Carroll et al.
patent: 5010887 (1991-04-01), Thornander
patent: 5014704 (1991-05-01), Alt
patent: 5050599 (1991-09-01), Hoegnelid
patent: 5065766 (1991-11-01), Sasaki
patent: 5103819 (1992-04-01), Baker et al
patent: 5117824 (1992-06-01), Keimel et al.
patent: 5269300 (1993-12-01), Kelly et al.
patent: 5330508 (1994-07-01), Gunderson
patent: 5339820 (1994-08-01), Henry et al.
patent: 5354316 (1994-10-01), Keimel
patent: 5370124 (1994-12-01), Dissing et al.
patent: 5374282 (1994-12-01), Nichols et al.
patent: 5417221 (1995-05-01), Sickler
patent: 5458621 (1995-10-01), White et al.
patent: 5470342 (1995-11-01), Mann et al.
patent: 5513644 (1996-05-01), McClure et al.
P.I. Bennett, et al., "Portable Defibrillator-Monitor for Cardiac Resuscitation," Hewlett-Packard Journal, vol. 3, pp. 22-28 (Feb. 1982).
A.F. Rickards, et al., "The Use of QT Interval to Determine Pacing Rate: Early Clinical Experience," PACE, 6, pp. 346-354 (Mar.-Apr. 1983).
N.V. Thakor, et al., "Design and Evaluation of QRS and Noise Detectors for Ambulatory E.C.G. Monitors," Med. & Biol. Eng. & Comput., 20, pp. 709-714 (1982).
N.V. Thakor, et al., "A Circuit for Minimizing False Alarms in Computerized ECG Monitoring," IEEE 1979 Frontiers of Engineering in Health Care, IEEE/Engineering in Medicine & Biology Society Conference, pp. 16-19 (Oct. 6-7, 1979).
N.V. Thakor, et al., "Optimal QRS Filter," IEEE 1980 Frontiers of Engineering in Health Care, IEEE/Engineering in Medicine & Biology Society Conference, pp. 190-195 (Sep. 28-30, 1980).
N.V. Thakor, "Design, Implementation, and Evaluation of a Microcomputer-Based Portable Arrhythmia Monitor," Thesis paper submitted at the University of Wisconsin -Madison (1981).
N.V. Thakor, "Reliable R-Wave Detection From Ambulatory Subjects," Biomedical Sciences Instrumentation, 14, Proceedings of the 15th Annual Rocky Mountain Engineering Symposium, pp. 67-72 (Apr. 17-18, 1978).
"R-Wave Detector," Design of Microcomputer-Based Medical Instrumentation, book edited by W.J. Tompkins and J.G. Webster, pp. 413-415 (1981).
R.A. Winkle, et al., "The Automatic Implantable Defibrillator: Local Ventricular Bipolar Sensing to Detect Ventricular Tachycardia and Fibrillation," Am. Journ. of Cardiology, 52, pp. 265-270 (Aug. 1983).
J.G. Webster, et al., "A Portable, Microcomputer-Based ECG Arrhythmia Monitor," Proceedings of the 31st Annual Conference on Engineering in Medicine & Biology, vol. 20, p. 60 (Oct. 21-25, 1980).
Igor Singer et al., "The Automatic Implantable Cardioverter Defibrillator: T Wave Sensing in the Newest Generation," PACE, 11, 1584-1591 (Nov. 1988).
N.V. Thakor et al., "Optimal QRS Detector," Med. & Biol. Eng. & Comput., 21, 343-350 (May 1983).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Slow gain control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Slow gain control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slow gain control will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-304347

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.