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Noninvasive sphygmomanometer

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  • Publication Date:
    March 07, 2006
  • Additional Information
    • Patent Number:
      7,008,379
    • Appl. No:
      10/682816
    • Application Filed:
      October 10, 2003
    • Abstract:
      A noninvasive sphygmomanometer capable of obtaining an accurate blood pressure value is provided without complicating a structure and with little time-consuming work. A photointerrupter 31, a wave-shaping circuit 75, a rotation number counting circuit 77, and a discharge amount calculating circuit 78 which measure a discharge amount of a pressure pump 13, and an arm circumference length detecting circuit 79 which calculates an arm circumference length of a subject person based on a relationship between a pressure in a bladder 8 provided in an armband 9 and the measured discharge amount of the pressure pump 13 is provided. Then, a blood pressure value is corrected based on the calculated arm circumference length.
    • Inventors:
      Takahashi, Yukio (Komochi-mura, JP); Suda, Eikichi (Komochi-mura, JP)
    • Assignees:
      Nihon Seimitsu Sokki Co., Ltd. (Gunma, JP)
    • Claim:
      1. A noninvasive sphygmomanometer, comprising: a discharge amount measurer which measures a discharge amount of a pressure pump; and a measuring region circumference length calculator which calculates a measuring region circumference length of a subject person or a subject animal based on a relationship between a pressure in a gas bag provided in a measuring region enclosing portion which encloses a measuring region of the subject person or the subject animal and the discharge amount measured by said discharge amount measurer wherein said discharge amount measurer sets a first threshold value and a second threshold value higher than the first threshold value and less than or equal to a target pressure set value under measurement, and measures the discharge amount of the pressure pump until reaching the second threshold value from the first threshold value, using a pressure value in the gas bag after the gas bag expands with a gas discharged from the pressure pump and occupies a space between the measuring region and the measuring region enclosing portion.
    • Claim:
      2. The noninvasive sphygmomanometer according to claim 1 , wherein a rotation number detector which counts the number of rotation of a motor for the pressure pump is provided on the pressure pump as said discharge amount measurer; and the number of rotation of the motor is counted and the discharge amount of the pressure pump is calculated by an output of the rotation number detector.
    • Claim:
      3. A noninvasive sphygmomanometer comprising: a rotation number detector which counts the number of rotation of a motor for a pressure pump: and a measuring region circumference length calculator which calculates a measuring region circumference length of a subject person or a subject animal based on a relationship between a pressure in a gas bag provided in a measuring region enclosing portion which encloses a measuring region of the subject person or the subject animal and the number of rotation of the motor counted by said rotation number detector wherein said rotation number detector sets a first threshold value and a second threshold value higher than the first threshold value and less than or equal to a target pressure set value under measurement, and measures the number of rotation of the motor until reaching the second threshold value from the first threshold value, using a pressure value in the gas bag after the gas bag expands with a gas discharged from the pressure pump and occupies a space between the measuring region and the measuring region enclosing portion.
    • Current U.S. Class:
      600/490
    • Patent References Cited:
      3812844 May 1974 Sokol
      4429699 February 1984 Hatschek
      4501280 February 1985 Hood, Jr.
      5595180 January 1997 Ogura et al.
      6228035 May 2001 Packman et al.
      2003/0040700 February 2003 Hickle et al.
      62-152702 September 1987
      6-245911 September 1994
    • Assistant Examiner:
      Natnithithadha, Navin
    • Primary Examiner:
      Hindenburg, Max F.
    • Attorney, Agent or Firm:
      Venable LLP
      Voorhees, Catherine M.
    • Accession Number:
      edspgr.07008379