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Apparatus for monitoring, storing and transmitting detected physiological information

  • US 5,012,411 A
  • Filed: 07/23/1985
  • Issued: 04/30/1991
  • Est. Priority Date: 07/23/1985
  • Status: Expired due to Fees
First Claim
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1. A portable, completely self-contained, battery-powered, microprocessor controlled, diagnostic quality apparatus small in size so as to be carried or worn by a patient or other user for monitoring, storing and transmitting detected physiological information of a person being monitored, the apparatus comprising:

  • means for sequentially receiving analog signals corresponding to heart activity from at least five different cardiac sensors attached at different locations on the body of the person being monitored to provide diagnostic quality cardiac information;

    means for receiving analog electrical signals corresponding to blood pressure of the person being monitored from at least one sensor;

    means for converting the received analog signals corresponding to heart activity and to blood pressure to a series of digital pulses at a predetermined sampling rate;

    memory means for receiving and storing the digital pulses in predetermined memory locations, the memory means being of the circular type and of a predetermined size capable of storing digital pulses equivalent to at least three minutes of diagnostic quality physiological activity so that when the memory means is filled with stored digital pulses, further digital pulses which are received are stored in the memory means by deleting previously stored digital pulses on a first-in, first-out basis, the memory means including means for preventing the deletion of at least a portion of the stored digital pulses corresponding to a period of physiological activity preceding the happening of an event, the memory means continuing to store digital pulses corresponding to physiological activity subsequent to the happening of the event until the memory means is filled, whereupon no further digital pulses are stored;

    means for recalling the stored digital pulses from the memory means;

    means for receiving the recalled digital pulses from the memory means, for converting the digital pulses to analog signals and for displaying the analog signals to provide a graphic representation of the physiological information;

    means for receiving the recalled digital pulses from the memory means and for transmitting the digital pulses to a remote location over a communications system; and

    means for receiving control signals from the remote location over the communications system and for converting the control signals into digital control pulses, the digital control pulses controlling operation of the apparatus and transferring data to the apparatus.

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