Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Reexamination Certificate
2007-04-03
2007-04-03
Evanisko, George R. (Department: 3762)
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
Reexamination Certificate
active
10872637
ABSTRACT:
A cardiac stimulator for measuring pacing impedance includes a tank capacitor for delivering charge to the heart via leads, a shunt resistor, and high-impedance buffers for measuring pacing current through the shunt resistor. During the stimulation pulse, the voltage across the shunt resistor, as sampled by a high-impedance buffer, variously indicates lead and cardiac tissue resistance or capacitance. A high-impedance buffer measures the voltage between the tank capacitor and ground immediately following the stimulation pulse to allow estimation of the lead/heart tissue capacitance. A lead/heart tissue capacitance estimate is determined by look-up table is in memory or successive approximation. When the lead/heart tissue capacitance and lead resistance have been determined, a plurality of parameters for analyzing and optimizing a cardiac stimulation system may be calculated, such as the instantaneous current, the average current, the charge, and the energy delivered to the cardiac tissue.
REFERENCES:
patent: 4245643 (1981-01-01), Benzing, III et al.
patent: 4337776 (1982-07-01), Daly et al.
patent: 4448196 (1984-05-01), Money et al.
patent: 4532931 (1985-08-01), Mills
patent: 4613850 (1986-09-01), Timmermann
patent: 4782281 (1988-11-01), Williamson
patent: 4830006 (1989-05-01), Haluska et al.
patent: 4899750 (1990-02-01), Ekwall
patent: 4949720 (1990-08-01), Thompson
patent: 4964407 (1990-10-01), Baker, Jr. et al.
patent: 5003975 (1991-04-01), Hafelfinger et al.
patent: 5137021 (1992-08-01), Wayne et al.
patent: 5201865 (1993-04-01), Kuehn
patent: 5215081 (1993-06-01), Ostroff
patent: 5224475 (1993-07-01), Berg et al.
patent: 5309917 (1994-05-01), Wang et al.
patent: 5391186 (1995-02-01), Kroll et al.
patent: 5423871 (1995-06-01), Hoegnelid et al.
patent: 5431692 (1995-07-01), Hansen et al.
patent: 5454377 (1995-10-01), Dzwonczyk et al.
patent: 5529072 (1996-06-01), Sramek
patent: 5534018 (1996-07-01), Wahlstrand et al.
patent: 5601612 (1997-02-01), Gliner et al.
patent: 5690687 (1997-11-01), Hansen
patent: 5716381 (1998-02-01), Reggiardo
patent: 5722997 (1998-03-01), Nedungadi et al.
patent: 5755742 (1998-05-01), Schuelke et al.
patent: 5836977 (1998-11-01), Myers
patent: 5897577 (1999-04-01), Cinbis et al.
patent: 6058325 (2000-05-01), Baura
patent: 6393317 (2002-05-01), Fukuda et al.
patent: 6473648 (2002-10-01), Prutchi et al.
patent: 6564099 (2003-05-01), Prutchi et al.
patent: 2002/0123773 (2002-09-01), Molin
Platia, E. V., “Time Course of Transvenous Pacemaker Stimulation Impedance, Capture Threshold, and Electrogram Amplitude”, Washington, D.C., (Sep./Oct. 19), pp. 620-625.
Ragheb, T, et al., “Electrical Properties of Metallic Electrodes”,Medical&Biological Engineering&Computing, West Lafayette, IN,(Mar. 1990), pp. 182-186.
Schaldach, M., Bioelectric Phenomena in Cardiac Pacing, Erlangen, West Germany,(1987), pp. 0139-0142.
Martin Gregory R.
Paul Patrick J.
Prutchi David
Cardiac Pacemakers Inc.
Evanisko George R.
Schwegman Lundberg Woessner & Kluth PA
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