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Method and system for acquiring biosignals during delivery of anesthesia or sedation in the presence of HF interference

  • US 9,037,225 B1
  • Filed: 12/22/2011
  • Issued: 05/19/2015
  • Est. Priority Date: 07/13/2007
  • Status: Active Grant
First Claim
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1. A method of acquiring biopotential signals from a subject during surgery in the presence of high frequency (HF) electrical interference resulting from an electrosurgical unit comprising the steps of:

  • attaching at least 2 electrodes to the subject,performing surgery on the subject utilizing an electrosurgical unit,acquiring and filtering biopotential signals from the subject using circuitry while performingsurgery on the subject utilizing the electrosurgical unit, with said circuitry comprising;

    at least one active input filter for rejection of HF electrical interference caused by the electrosurgical unit, andan isolation barrier where data is transmitted via magnetic coupling;

    transmitting the biopotential signals to a processor, andobtaining a quantitative measure of a level of HF interference, wherein said processor uses said measure of HF electrical interference to modify at least one behavior of the at least one input filter.

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