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Method and apparatus for the measurement of intracranial pressure

  • US 5,074,310 A
  • Filed: 07/30/1991
  • Issued: 12/24/1991
  • Est. Priority Date: 07/31/1990
  • Status: Expired due to Term
First Claim
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1. A method of non-invasively measuring changes in a patient'"'"'s intracranial pressure from said patient'"'"'s normal intracranial pressure, comprising the steps of:

  • (a) generating a predetermined input vibration signal and applying said input signal at a first location on a patient'"'"'s skull which is not affected by changes in intracranial pressure;

    (b) detecting a first output vibration signal from a second location on said patient'"'"'s skull which is not affected by changes in intracranial pressure, said output signal being a modification of said input signal, said input signal having been changed as a function of said patient'"'"'s normal intracranial pressure;

    (c) storing data characteristic of said input and output signals into a data base;

    (d) generating said input signal a second time and applying this second input signal at a third location on said patient'"'"'s skull which is affected by changes in intracranial pressure, different from said first and second locations;

    (e) detecting a second output vibration signal from a fourth location different from said first and second locations, said fourth location being located at a place on said patient'"'"'s skull which is affected by changes in intracranial pressure, said second output signal having been changed as a function of said patient'"'"'s present intracranial pressure; and

    (f) comparing data characteristics of said input signal and said second output signal to data contained in said data base to determine the degree to which said patient'"'"'s intracranial pressure differs from said patient'"'"'s normal intracranial pressure.

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