Title: Electrode switching means for use in a defibrillator

Abstract: A defibrillator is described having separate amplifiers for the paddles and the ECG electrodes and means for supplying cardiographic signals to an output amplifier from the amplifier associated with the ECG electrodes when they are properly attached to the patient and for automatically coupling cardiographic signals to the output amplifier from the amplifier associated with the paddles if any combination of the ECG electrodes become improperly attached.

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Inventors: Finlayson, Dana C. (Natick, MA, US)
Gatzke, Ronald D. (Lexington, MA, US)
Stettiner, Robert L. (Lexington, MA, US)

Application Number: 805552
Filing Date: 1977-06-10
Publication_date: 1979-08-14
Assignee: Hewlett-Packard Company (Palo Alto, CA)
Primary Class(es): 600/508 607/5
Other Classes:
US Patent Ref:

3513850	May, 1970	Weber	128/419.
3548807	Dec, 1970	Crovella	128/2.
3587562	Jun, 1971	Williams	128/2.
3611174	Oct, 1971	Day	128/2.
3653387	Apr, 1972	Ceier	128/2.
3690313	Sep, 1972	Weppner et al.	128/2.
3757778	Sep, 1973	Graham	128/2.
3994286	Nov, 1976	Svensson	128/2.

Other Refs:
Primary Examiner: Kamm, William E.
Assistant Examiner:
Attorney: Timbie; Donald N.