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Blood pressure measuring system

  • US 5,564,426 A
  • Filed: 04/25/1994
  • Issued: 10/15/1996
  • Est. Priority Date: 08/26/1992
  • Status: Expired due to Term
First Claim
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1. A blood pressure measuring system comprising:

  • an occluding cuff adapted in use to be attached to a selected portion of a subject;

    pressurizing means for providing an occluding pressure of said cuff;

    pressure bleeding means for gradually decreasing said occluding pressure;

    a pressure sensor for sensing an instantaneous cuff pressure measurement and providing an electrical signal indicative thereof;

    pressure data separating means for separating from said electrical signal an arterial pulse component superimposed on a net cuff pressure during a pressure bleeding period of gradually decreasing said occluding pressure so as to separately extract said arterial pulse component and said net cuff pressure;

    blood pressure determining means for determining systolic and diastolic blood pressures in accordance with said net cuff pressure and said arterial pulse component provided from said pressure data separating means; and

    display means for displaying the respective systolic and diastolic blood pressures;

    said pressure data separating means including a waveform analyzing means for determining a waveform value of each arterial pulse by the use of pulse width and pulse height of said arterial pulse;

    said blood pressure determining means including a characteristic value detecting section detecting a characteristic value from a time series of said waveform values and including a blood pressure deriving section for deriving said systolic and diastolic blood pressures in accordance with said net cuff pressure corresponding to said characteristic value.

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