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Automatic lead switching for ECG monitor

  • US 5,788,644 A
  • Filed: 10/08/1996
  • Issued: 08/04/1998
  • Est. Priority Date: 10/08/1996
  • Status: Expired due to Fees
First Claim
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1. An electrocardiogram (ECG) monitor for detecting and displaying an ECG waveform of a patient, comprising:

  • a plurality of electrodes including a reference electrode and at least two detecting electrodes which detect an ECG waveform of the patient;

    electrode status detection means for detecting whether said detecting electrodes and reference electrode are connected to the patient and for generating electrode status signals;

    reference lead switching means responsive to said electrode status signals for selecting a detecting electrode as a new reference electrode when said electrode status detection means detects that at least said reference electrode is not connected to the patient and for selecting electrodes of said plurality of electrodes to be used to generate a common mode drive signal for application to said new reference electrode; and

    means for processing ECG waveforms acquired from said detecting electrodes in response to application of a common mode drive signal to said new reference electrode and for displaying said ECG waveforms to an operator.

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