| US 7,463,923 B2 | ||
| Method and apparatus for delivering a biphasic defibrillation pulse with variable energy | ||
| James E. Brewer, Lino Lakes, Minn. (US); Gary B. Stendahl, Crystal, Minn. (US); and Kenneth F. Olson, Edina, Minn. (US) | ||
| Assigned to Cardiac Science Corporation, Bothell, Wash. (US) | ||
| Filed on Jan. 16, 2004, as Appl. No. 10/760,040. | ||
| Application 10/760040 is a continuation of application No. 10/078735, filed on Feb. 19, 2002, abandoned. | ||
| Application 10/078735 is a continuation of application No. 09/678820, filed on Oct. 04, 2000, granted, now 6,411,846. | ||
| Application 09/678820 is a continuation in part of application No. 09/383561, filed on Aug. 26, 1999, granted, now 6,263,239. | ||
| Application 09/383561 is a continuation in part of application No. 08/886736, filed on Jul. 01, 1997, granted, now 5,968,080. | ||
| Claims priority of provisional application 60/021161, filed on Jul. 01, 1996. | ||
| Prior Publication US 2004/0172072 A1, Sep. 02, 2004 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. A61N 1/39 (2006.01) | ||
| U.S. Cl. 607—5 | 4 Claims |
| 1. A method for dynamically determining a second phase of a transchest external defibrillation biphasic shock pulse which,
when applied though electrodes positioned on a patient's torso, will produce a desired response in the patient's cardiac cell
membranes, including:
providing a quantitative model of a defibrillator circuit for producing the external defibrillation shock pulse;
providing a quantitative model of a patient including a chest component, a heart component and a cardiac cell membrane component;
providing a quantitative description of a predetermined response of said cardiac cell membrane to said shock pulse; and
providing instructions comprising:
computing a quantitative description of a first phase of a transchest external defibrillation shock pulse that will produce
said predetermined cardiac cell membrane response, wherein said computation is made as a function of predetermined cardiac
cell membrane response, the patient model and defibrillator circuit model; and
computing a quantitative description of a second phase of a transchest external defibrillation shock pulse based on the first
phase.
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