Patent ID: 6263239
Filing Date: 2001-07-17
Classification: A61N

Abstract:
A method for determining the second phase of a biphasic defibrillation shock pulse, said second phase having variable energy, wherein upon application of said second phase of said biphasic defibrillation shock pulse a desired response is produced in a patient's cardiac cell membrane, comprising:providing a quantitative model of a defibrillator circuit for producing said biphasic defibrillation shock pulse;providing a quantitative model of a patient that includes a variable heart component;providing a quantitative description of a predetermined response of said cardiac cell membrane to said shock pulse;determining a quantitative description of a first phase of said biphasic defibrillation shock pulse that will produce said predetermined response of said cardiac cell membrane, wherein the determination is made as a function of said predetermined response of said cardiac cell membrane, said quantitative model of a defibrillator circuit, and said quantitative model of a patient; anddetermining a quantitative description of a second phase of said biphasic defibrillation shock pulse based on said first phase, wherein said quantitative description provides for setting a time duration for said second phase based on said variable heart component whereby an amount of energy to be delivered by said second phase varies according to said time duration that is set.