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Temperature sensing and control system for cardiac monitoring electrodes

  • US 5,209,233 A
  • Filed: 02/11/1991
  • Issued: 05/11/1993
  • Est. Priority Date: 08/09/1985
  • Status: Expired due to Term
First Claim
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1. A non-invasive diagnostic apparatus comprising:

  • a means for subjecting a region of interest of a patient to changing magnetic fields and radio frequency signals in order to induce and encode magnetic resonance of selected nuclei in the region of interest;

    an electrode for engaging the patient to monitor ECG signals;

    an electrically conductive lead having a clip means for selectively engaging and establishing electrical communication with the electrode, the radio frequency signals inducing radio frequency currents in the lead which currents can cause heating of the electrode;

    a temperature sensing means mounted to the clip means for sensing temperature;

    a means mounted in series between the electrically conductive lead and the electrode for passing the ECG signals while inhibiting the passage of the radio frequency currents;

    a receiving means for receiving magnetic resonance signals from the region of interest;

    a sequence control means for controlling application of magnetic field gradients and radio frequency pulses and processing the received magnetic resonance signals into diagnostic information.

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