The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2003
Filed:
Jan. 18, 2000
Scott A. Wuthrich, Reading, MA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A defibrillation method and apparatus are described for delivering a desired quantity of electric charge to a patient. The method and apparatus are applicable both to external defibrillation and to defibrillation by an implanted device. The method includes determining one or more intended waveform parameters based on the desired quantity of electric charge and, optionally, on one or more patient impedance values. A defibrillation waveform is then generated and applied to the patient based on the intended waveform parameters. The patient impedance values may be predetermined or operator-selected, or the method may include the step of determining the patient impedance values. Patient impedance values may be determined prior to, substantially contemporaneous with, and/or during application of the defibrillation waveform to the patient. If a patient impedance value is determined to have changed from a previously determined value, then the intended waveform parameters may be adjusted based on this change in order to provide that the desired quantity of charge is applied to the patient.