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Non-invasive method of determining absolute intracranial pressure

  • US 6,773,407 B2
  • Filed: 09/25/2002
  • Issued: 08/10/2004
  • Est. Priority Date: 04/08/2002
  • Status: Expired due to Fees
First Claim
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1. A method of determining absolute intracranial pressure (ICP) in a patient, comprising the steps of:

  • monitoring skull expansion of the patient as a function of time;

    inducing changes in ICP in the patient;

    measuring blood pressure of the patient at a time when said skull expansion is approximately zero during said step of inducing wherein said blood pressure at said time is indicative of a reference ICP value;

    causing a known change in ICP in the patient after said time;

    measuring a change in said skull expansion of the patient associated with said known change in ICP; and

    determining a skull expansion calibration factor, wherein the absolute ICP is a function of said reference ICP value, said measured change in skull expansion and said skull expansion calibration factor.

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