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Blood pressure measuring apparatus

  • US 5,840,036 A
  • Filed: 03/04/1997
  • Issued: 11/24/1998
  • Est. Priority Date: 01/25/1995
  • Status: Expired due to Fees
First Claim
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1. A transducer for use with a blood pressure measuring system having means for applying pressure to a patient'"'"'s artery to arrest blood flow in the artery and for releasing the pressure wherein a signal occurs when the pressure applied by the pressure applying means is reduced sufficiently to permit the commencement of intermittent blood flow in the artery, said signal having a wavelength, said transducer including first and second signal responsive means for sensing the signal occurring upon the commencement of blood flow in the artery, said first and second responsive means being spaced apart a distance equal to about one-quarter of the wave length of the signal associated with the commencement of blood flow as the pressure on the artery is reduced.

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