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NIBP target inflation pressure automation using derived SPO 2 signals

  • US 8,211,030 B2
  • Filed: 03/26/2009
  • Issued: 07/03/2012
  • Est. Priority Date: 03/26/2009
  • Status: Active Grant
First Claim
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1. A method of monitoring blood pressure in a patient, the method comprising the steps of:

  • providing a pulse monitor having a sensor operable to detect pulse signals due to the patient'"'"'s heartbeat;

    positioning a blood pressure cuff on the patient;

    positioning the sensor on the patient distal to the blood pressure cuff to detect pulse signals from the patient;

    inflating the blood pressure cuff;

    calculating, using a central processor, a second derivative of the pulse signals during inflation of the blood pressure cuff, the second derivative including a series of acceleration pulse peaks;

    reducing low frequency variations in the pulse signals based on the calculated second derivative of the pulse signals; and

    terminating the inflation of the blood pressure cuff based upon the acceleration pulse peaks in the calculated second derivative of the pulse signals; and

    defining an initial target pressure after terminating the inflation of the blood pressure cuff.

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