Title:
【発明の名称】細動除去方法および装置
Document Type and Number:
Japanese Patent JP2001522272
Kind Code:
A
Abstract:
A defibrillator method and apparatus wherein a patient's measured transthoracic impedance (TTI) is used to control the amount of energy contained in a defibrillation pulse applied to the patient. Prior to delivering a defibrillation pulse, the patient's TTI is measured by an impedance measuring circuit (11). The patient's TTI may also be measured during delivery of a prior defibrillation pulse. A microprocessor (23) uses the measured patient TTI to control the shape of the defibrillation pulse by controlling: (i) the phase duration of the defibrillation pulse; and (ii) the voltage level to which the defibrillator's capacitor bank (15) is charged. The defibrillation pulse shape is controlled so that the energy conveyed by the defibrillation pulse to the patient is near or exceeds a desired value. The desired value may be set by an operator via an energy selector (25). A switch (13) controls the connection of defibrillator electrodes (27a, 27b) to the impedance measuring circuit (11) and the capacitor bank (15).
Inventors:
Ella Buddy, Tarek Zett
Chapman, Fred W
Sullivan, Joseph El
Nova, Richard Sea
Bolshois, Lawrence A
Chapman, Fred W
Sullivan, Joseph El
Nova, Richard Sea
Bolshois, Lawrence A
Application Number:
JP54616498A
Publication Date:
November 13, 2001
Filing Date:
April 17, 1998
Export Citation:
Assignee:
Physio-Control Manufacturing Corporation
International Classes:
A61N1/39; (IPC1-7): A61N1/39
Attorney, Agent or Firm:
Takehiko Suzue (4 outside)