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Noninvasive blood pressure monitoring transducer

  • US 4,423,738 A
  • Filed: 11/04/1977
  • Issued: 01/03/1984
  • Est. Priority Date: 11/04/1977
  • Status: Expired due to Term
First Claim
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1. In a system for the continuous external measurement of blood pressure in an underlying artery comprising at least one transducer array having a multiplicity of individual pressure sensitive elements, each of said individual pressure sensitive elements in said array having at least one dimension smaller than the lumen of the underlying artery in which blood pressure is measured and each individual pressure sensitive element being capable of producing a continuous waveform having an amplitude which is a function of blood pressure in an underlying artery, means responsive to the waveform output of all of the said individual pressure sensitive elements to select the single one of the said transducer elements which is best positioned in the arterial pressure sensing environment for blood pressure measurement, and means to utilize the output of only the said single one of the said individual pressure sensitive elements to measure blood pressure and produce a continuous waveform having an amplitude which is a function of blood pressure in an underlying artery.

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