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Protection of EKG monitor against electrical surgical interference

  • US 4,800,894 A
  • Filed: 11/07/1986
  • Issued: 01/31/1989
  • Est. Priority Date: 11/07/1986
  • Status: Expired due to Fees
First Claim
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1. A protective device for EKG monitor for in surgical electrocautery and comprising an EKG monitoring apparatus having monitoring electrode input means and display means for providing a continuous instantaneous EKG display, electrodes for attachment to a surgical patient, conductive means interconnecting said electrodes and said input means of said EKG monitoring apparatus, and wherein said surgical electrocautery is carried out with an electrocautery surgical knife and a radio frequency energy source operatively connected thereto;

  • wherein said protective device comprises electrical disabling means coupled with said input means for removing said electrodes from operative circuit connection with said input means in response to a control signal and radio frequency detector means operatively coupled with the patient and responsive to the presence of radio frequency energy for producing said control signal.

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