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Pressure waveform monitor

  • US 5,363,855 A
  • Filed: 08/25/1992
  • Issued: 11/15/1994
  • Est. Priority Date: 03/27/1990
  • Status: Expired due to Term
First Claim
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1. A pressure waveform monitor for noninvasively monitoring the blood pressure waveform inside a blood vessel having, a lumen, comprising:

  • a continuous, stress sensitive diaphragm for pressing against tissue covering the blood vessel, said diaphragm having a first length, said first length being greater than the lumen of said blood vessel, said diaphragm being continuously deformable along said first length in response to stresses in said tissue,sensor means displaced from said diaphragm for sensing deformations from predetermined portions along said first length of said diaphragm and for producing a vessel stress signal representing the deformation along each predetermined portion of said diaphragm, wherein said sensor means uses electromagnetic radiation reflected from said diaphragm for producing said stress signal, means for determining blood pressure from said vessel stress signal.

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