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Electrocardiographic telemetry and telephone transmission link system

  • US 3,882,277 A
  • Filed: 04/20/1972
  • Issued: 05/06/1975
  • Est. Priority Date: 04/20/1972
  • Status: Expired due to Term
First Claim
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1. A system for transmitting an EKG signal from an ambulatory patient to a remote monitor comprising a portable patient-borne unit carried by said patient for detecting said EKG signal and transmitting a radio-frequency signal representative thereof, a telemetry receiver within range of said patient-borne unit for detecting said radio-frequency signal and for converting it to an audio-frequency electrical signal representative of said EKG signal, a telephone link for extending said audio-frequency electrical signal to said remote monitor, said telephone link including a first telephone, a second telephone, a communication channel therebetween, a pair of electrical-acoustical transducers, each of said transducers including a housing with a speaker contained therein, a first of said transducer housings being placed over the mouthpiece of said first telephone with the telemetry receiver audio-frequency electrical signal being electrically coupled to the respective transducer, the second of said transducer housings being placed over the earpiece of said second telephone with the respective transducer being electrically coupled to said remote monitor, and wherein the transducer attached to the mouthpiece of said first telephone includes an electrical switch which when operated breaks the electrical connection of the transducer, said patient-borne unit further including electrode leads for connection to said patient for detecting an EKG signal, and means for applying the radiofrequency signal to said leads so that said leads further function as an anTenna for transmitting said signal.

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