Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1994-08-24
1997-01-07
Manuel, George
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 139
Patent
active
055912109
ABSTRACT:
The present invention provides a biophysical-electronic system and method embodied in a defibrillation system with a range of pulse durations under 6 milliseconds, which is precisely the optimal range. The present invention provides an implantable defibrillator that delivers such waveforms. The present invention specifies optimal pulse duration for a given capacitor size, a determination that takes into account both the time constant of the system and the characteristic time (chronaxie) of the cardiac tissue. In addition to enhancing defibrillation effectiveness, the present invention provides size reduction in the implantable system, or the increased battery (and hence system) life, or some of both. The lower-energy shocks also reduce tissue damage from defibrillation procedures.
REFERENCES:
patent: 4708145 (1987-11-01), Tacker, Jr. et al.
patent: 4953551 (1990-09-01), Mehra et al.
Cardiac Pacemaker, Inc., St. Paul, MN; Model 1700.
Ventritex, Sunnyvale, CA., "Cadence" tiered therapy defibrillator Model V-100.
Cardiac Pacemakers, Inc., St. Paul, MN; Ventak AICD, cardioverter defibrillator Models 1500,1510,1520.
Medtronic, Inc., "Tachyarrhythmia Management", 1991, Annual Report 1991, pp. 12,13.
Telectronics Pacing Systems, Inc., "Gaurdian ATP", 1990, Product Brochure, p. 1.
Cardiac Pacemakers, Inc., "Advanced AICD Therapy Made Easy", 1991, Product Brochure, pp. 1,2.
Hook et al., Advances in Third-Generation ICD Therapy, Cardio, Nov. 1991 pp. 66-72.
Hammel et al., Implantation of a Cardioverter/Defibrillator in Subpectoral Region combined with a Nonthoracotomy Lead System, Pace, vol. 15, Apr. 1992, pp. 367-368.
Yee et al., Can. J. Cardiol., vol. 6, No. 4, pp. 147-156 (1990).
Rattes et al., American Heart Journal, vol. 111, No. 5, pp. 874-878 (1986).
Kallok et al., Medical Instruments, vol. 20, No. 1, pp. 36-39 (1986).
Kallok et al., Am. Heart J., vol. 109, No. 4, pp. 821-826 (1986).
Jones et al., Circulation, vol. 73, No. 3, pp. 484-491 (1986).
Chang et al., JACC, vol. 8, No. 6, 1393-1405 (1986).
Lang et al., IEEE Engineering in Medicine and Biology Society, vol. 11:1989.
Louis Lapicque, "Experimental Definition of Excitability", Proc. Soc. de Biol., vol. 77, pp. 280-285, 1909.
Geddes, L. A. and Tacker, W. A., Med. & Biol. Engng., vol. 9, pp. 185-199.
Geddes, L. A. et al., Med. & Biol. Engng. & Computing, vol. 23, No. 2, London, Great Britian, pp. 120-130.
Lang, Douglas J., et al. Strength-Duration Relationship For Biphasic Defibrillation in Dogs, IEEE, 1989.
G. Weiss, "Sur la possibilite' de rendre comparable entre eux les appareils survant a l'excitation electrique," Arch. Ital. de Biol., vol. 35, pp. 413-446, 1901.
H. Fredericq, "Chronaxie: Testing excitability by means of a time factor," Physiol. Rev., vol. 8, pp. 501-545, 1928.
L. Lapicque, "Definition experimentalle de l'excitabilite'," Proc. Soc. de Biol., vol. 77, pp. 280-285, 1909.
J. D. Bourland, W. A. Tacker, and L. A. Geddes, "Strength duration curves for trapezoidal waveforms of various tilts for transchest defibrillation in animals," Med. Instr., vol. 12 #1, pp. 38-41, 1978.
J. D. Bourland, W. A. Tacker, L. A. Geddes, et al, "Comparative efficacy of damped sine wave and square wave current for transchest ventricular defibrillation in animals," Medical Instrum., vol. 12 #1, pp. 38-41, 1978.
L. A. Geddes, M. J. Niebauer, C. F. Babbs, et al, "Fundamental criteria underlying the efficacy and safety of defibrillating current waveforms," Med Biol Eng Comp, vol. 23, pp. 122-130, 1985.
J. H. Gold, J. C. Schuder, H. Stoeckle, et al, "Transthoracic ventricular defibrillation in the 100 Kg calf with unidirectional rectangular pulses," Circulation, vol. 56 #5, pp. 745-750, Nov. 1977.
J. L. Wessale, J. D. Bourland, W. A. Tacker, et al, "Bipolar catheter defibrillation in dogs using trapezoidal waveforms of various tilts," J Electrocardiology, vol. 13(4), pp. 359-366, 1980.
J. L. Jones and R. E. Jones, "Determination of safety factor for defibrillator waveforms in cultured heart cells," Am J Physiol, vol. 242, pp. H662-H670, 1982.
M. J. Niebauer, C. F. Babbs, L. A. Geddes, et al, "Efficacy and safety of defibrillation with rectangular waves of 2 to 20-milliseconds duration," Crit. Care Medicine, vol. 11 #2, pp. 95-98, Feb. 1983.
S. A. Feeser, A. S. L. Tang, K. M. Kavanagh, et al, "Strength-duration and probability of success curves for defibrillation with biphasic waveforms," Circulation, vol. 82, pp. 2128-2141, Dec. 1990.
G. Koning, H. Schneider, A. J. Hoelen, et al, "Amplitude-duration relation for direct ventricular defibrillation with rectangular current pulses," Med Biol Eng, vol. 13, pp. 388-395, May 1975.
J. L. Jones, R. E. Jones, and G. Balasky, "Improved cardiac cell excitation with symmetrical biphasic defibrillator waveforms," Am J Pysiol, vol. 253, pp. H1418-H1424, 1987.
A. S. Tang, S. Yabe, M. Wharton, et al, "Ventricular defibrillation using biphasic waveforms: the importance of phasic duration," J Am Coll Cardiol, vol. 13, pp. 207-214, Jan. 1989.
The PCD Tachyarrhythmia Control Device, Model 7217B Device for the control of Ventricular Arrhythmias Through Pacing, Cardioversion and Defibrillation, Medtronic, Inc. Mar. 1990.
Adams Theodore P.
Kroll Mark W.
Angeion Corporation
Getzow Scott M.
Manuel George
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