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Method for monitoring blood flow to brain

  • US 7,998,080 B2
  • Filed: 07/15/2004
  • Issued: 08/16/2011
  • Est. Priority Date: 01/15/2002
  • Status: Expired due to Fees
First Claim
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1. A method of monitoring blood flow in a patient'"'"'s brain during surgery, comprising:

  • a) performing surgery on the patient;

    b) causing currents to flow inside the patient'"'"'s head by producing electric fields inside the head during the surgery, by placing at least two current-carrying electrodes on the head, and applying at least two different electric potentials to the current-carrying electrodes;

    c) measuring at least changes in the electric fields and the currents during the surgery;

    d) estimating changes in the blood volume of the head during the surgery, using a controller to analyze data of the measurements of the electric fields and the currents; and

    e) estimating blood flow in the brain during the surgery, from the changes in blood volume of the head.

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