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ELECTRONIC MANOMETER FOR APPROPRIATELY ADJUSTING INTERNAL PRESSURE OF CUFF AND METHOD FOR CONTROLLING THE SAME

  • US 20090312652A1
  • Filed: 07/20/2007
  • Published: 12/17/2009
  • Est. Priority Date: 08/03/2006
  • Status: Abandoned Application
First Claim
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1. An electronic manometer comprising:

  • a cuff attached to a blood pressure measurement site of a measurement subject;

    a pressure adjustment unit for adjusting a pressure to apply on the cuff;

    a pressure detection unit for detecting a pressure within the cuff;

    an artery volume detection unit for detecting a volume of an artery of the measurement subject, which changes by a change in the pressure within the cuff and pulsation; and

    a measurement unit for controlling the volume of the artery of the measurement subject so as to be constant by causing the pressure adjustment unit to increase or decrease the pressure to apply on the cuff based on the change in the volume of the artery of the measurement subject, and measuring a blood pressure of the measurement subject from an increased or decreased value of the pressure to apply on the cuff;

    whereinthe measurement unit includes,a pressure maintaining unit for detecting the pressure within the cuff at which an amplitude of the change in the volume of the artery of the measurement subject becomes a maximum, and maintaining the pressure,a feedback control unit for operating the pressure adjustment unit based on the change in the volume of the artery of the measurement subject and feedback controlling so that the amplitude of the change in the volume of the artery of the measurement subject becomes a minimum, andan extracting unit for extracting the pressure within the cuff when the amplitude of the change in the volume of the artery of the measurement subject becomes a minimum by the control from the feedback control unit as the blood pressure of the measurement subject;

    the pressure maintaining unit,causes the artery volume detection unit to detect the volume of the artery of the measurement subject while superimposing a vibration of high frequency during a period of causing the pressure adjustment unit to raise the pressure to apply on the cuff or during a period to lower after raising to greater than or equal to a systolic blood pressure of the measurement subject to detect the pressure within the cuff at which the amplitude of the change in the volume of the artery of the measurement subject becomes a maximum, anddetects the pressure within the cuff at which the amplitude of the change in the volume of the artery of the measurement subject becomes a maximum at a start of measurement of the blood pressure by the measurement unit and at a predetermined time other than at the start of measurement.

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