Surgery – Truss – Pad
Patent
1990-03-30
1992-03-24
Cohen, Lee S.
Surgery
Truss
Pad
128734, A61N 139
Patent
active
050978306
ABSTRACT:
A defibrillator is described with dual processors for verifying the performance of the defibrillator and halting the application of a defibrillation pulse to a patient if a failure of system components is detected. In accordance with one aspect of the invention, verification is performed to determine whether a transfer relay switch should be closed to permit the application of a defibrillation pulse through the transfer relay switch to a patient. In addition, in one form of the invention, an electronic switch is provided in a series discharge circuit through the patient. Verification by both processors of proper conditions for application of a defibrillation pulse is required before a determination pulse is applied through the switch. In addition, an impedance circuit is provided with a mechanism for checking the accuracy of the circuit during operation of the defibrillator.
REFERENCES:
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patent: 4202340 (1980-05-01), Langer et al.
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patent: 4432375 (1984-02-01), Angel et al.
patent: 4504773 (1985-03-01), Suzuki et al.
patent: 4823796 (1989-04-01), Benson
Article entitled: "Standard for Automatic External Defibrillators," dated Nov. 14, 1989 from the Association for the Advancement of Medical Instrumentation.
Article entitled: "Microcomputers in Safety Technique, and Aid to Orientation for Developer and Manufacturer," published by Verlag Tuv Rheinland Gmblt, Koln in 1984.
Eikefjord Arild J.
Fossan Helge
Cohen Lee S.
Laerdal Manufacturing Corporation
Schaetzle Kennedy J.
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