Electrocardiograph telemetry system including method and means f

Details Electrocardiograph telemetry system including method and means f Electrocardiograph telemetry system including method and means f

1974-04-12

1976-04-27

Caldwell, John W.

Communications: electrical

Audible indication

Pneumatic-type sound producer

128 206R, 128 21A, 340253Y, 340279, 325 48, 325186, G08B 2900, A61B 504

Patent

active

039538486

ABSTRACT:
Special circuitry in the transmitter of an electrocardiograph (ECG) telemetry system detects various malfunctions of the system and changes the transmitted signal to indicate their presence to the system receiver. When the transmitter detects that an input electrode has become detached from the patient, it changes the frequency of the subcarrier signal to indicate this problem to the receiver. The receiver monitors the subcarrier frequency and flashes an alarm light when the frequency corresponds to the electrode inoperative condition.

REFERENCES:
patent: 3212496 (1965-10-01), Preston
patent: 3253588 (1966-05-01), Vuilleumier et al.
patent: 3631433 (1971-12-01), Dix
patent: 3639907 (1972-02-01), Greatbatch
patent: 3641547 (1972-02-01), Reiss et al.

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