Heartstream, Inc.

John Fluke Mfg. Co., Inc.

Steven T Mydynski

Daniel J Powers

Carlton B Morgan

Clinton S Cole

Thomas D Lyster

David B Cameron

Michael J Leventhal

Michael Nelson

Bryan L Sparrowhawk

John M Redfield, Jr

Alfred T Volberding

Michael F Curneen

Wong Heiman

A defibrillator with an automatic self-test system that includes a test signal generator and a defibrillator status indicator. The test system preferably performs functional tests and calibration verification tests automatically in response to test signals generated periodically and/or in response to predetermined conditions or events and indicates the test results visually and audibly. The invention also relates to a method for automatically determining and indicating a defibrillator's status without human intervention.

External defibrillator with automatic self-testing prior to use

Method for performing self-test in a defibrillator

A defibrillator system comprising an external defibrillator, a defibrillator communicator and a communication network. In a preferred embodiment, the defibrillator comprises electrodes, an energy source and a controller, with the controller comprising an ECG signal analyzer and means for local actuation of the defibrillator to deliver an electrical pulse from the energy source to the electrodes. The communication network comprises a communication station, preferably a computer with a modem, and signal carriers, such as telephone lines, so that information can be transmitted from the communicator to the communication station. Likewise, the defibrillator communicator comprises means for automatically transmitting information to the communication station in response to deployment of the defibrillator. In alternative embodiments, additional information (such as patient ECG data and defibrillator operation data) is sent from the communicator to the communication station, and information (such as use instructions) is sent from the communication station to the communicator. The invention also includes a method of operating such a defibrillator system.

External defibrillator with communications network link

A defibrillator system comprising an external defibrillator, a defibrillator communicator and a communication network. In a preferred embodiment, the defibrillator comprises electrodes, an energy source and a controller, with the controller comprising an ECG signal analyzer and local actuator on the defibrillator for delivering an electrical pulse from the energy source to the electrodes. The communication network comprises a communication station, preferably a computer with a modem, and signal carriers, such as telephone lines, so that information can be transmitted from the communicator to the communication station. The defibrillator communicator automatically transmits information to the communication station in response to deployment of the defibrillator. In alternative embodiments, additional information (such as patient ECG data and defibrillator operation data) is sent from the communication station to the communicator. A method of operating such a defibrillator system is included.

Defibrillator system using multiple external defibrillators and a

Digital multimeter accessory

In a temperature measurement system using a thermocouple connected to a pair of circuit wires coupled to a voltmeter for providing an output reading, an isothermal block (48) formed of alumina ceramic contains a series of openings (58-66) in linear juxtaposition. Metal connectors (68) located in two of the openings to interconnect the thermocouple and printed circuit wires of a circuit board (52) establish a reference junction. A temperature sensor (50), preferably a transistor, in a third opening measures the temperature of the isothermal block (48) to compensate the output reading for error created by the reference junction. The connectors (68) are in resilient contact with the interior wall of the isothermal block (48) to maintain good heat conductivity between the connectors and the temperature sensor (50). Portions of the connectors (68) extending outside the isothermal block (48) retain the isothermal block (48) to the circuit board (52).

Isothermal block for temperature measurement system using a thermocouple

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Bothell, WA, United States of America

Steven T Mydynski