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Blood pressure measuring apparatus

  • US 10,349,842 B2
  • Filed: 08/17/2011
  • Issued: 07/16/2019
  • Est. Priority Date: 08/17/2010
  • Status: Active Grant
First Claim
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1. A blood pressure measuring apparatus, configured to measure a blood pressure of a living body, the blood pressure measuring apparatus comprising:

  • a cuff-pressure control unit configured to control a cuff pressure of a cuff that presses a part of the living body;

    an oscillation signal detection unit configured to detect an oscillation signal from the cuff pressure;

    a blood pressure specification unit configured to measure systolic and diastolic blood pressures as the blood pressure of the living body from the oscillation signal; and

    a blood pressure determination unit configured to determine whether the systolic and diastolic blood pressures are appropriately measured by the blood pressure specification unit based on the oscillation signal detected by the oscillation signal detection unit and previously stored criteria in the blood pressure measuring apparatus,wherein the cuff-pressure control unit is further configured to control the cuff pressure to be inflated to a first set value, the blood pressure specification unit is further configured to specify the systolic and diastolic blood pressures based on a change of the oscillation signal that is detected by the oscillation signal detection unit during inflation of the cuff pressure to the first set value, and when the blood pressure determination unit determines that both the systolic and diastolic blood pressures are determined to be appropriately measured by the blood pressure specification unit based on the oscillation signal detected by the oscillation signal detection unit during inflation of the cuff pressure to the first set value, the cuff-pressure control unit is configured to end the inflating of the cuff pressure of the cuff to release the cuff pressure, andwherein when the blood pressure determination unit determines that at least one of the systolic and diastolic blood pressures is determined not to be appropriately measured by the blood pressure specification unit based on the oscillation signal detected by the oscillation signal detection unit when the cuff pressure is inflated to the first set value, the cuff-pressure control unit controls the cuff pressure to be inflated to a second set value greater than the first set value, and then the cuff pressure to be deflated, and the blood pressure specification unit is further configured to specify the systolic and diastolic blood pressures based on the change of the oscillation signal that is detected by the oscillation signal detection unit during deflation of the cuff pressure from the second set value.

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