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BODY-WORN SYSTEM FOR MEASURING CONTINUOUS NON-INVASIVE BLOOD PRESSURE (cNIBP)

  • US 20100168589A1
  • Filed: 12/30/2009
  • Published: 07/01/2010
  • Est. Priority Date: 06/12/2007
  • Status: Active Grant
First Claim
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1. A system for monitoring a patient'"'"'s blood pressure, the system comprising:

  • a pressure-delivery system for applying a variable pressure to the patient'"'"'s arm;

    a pressure sensor for measuring a time-dependent pressure waveform representing the pressure applied to the patient'"'"'s arm;

    a first sensor configured to attach to the patient and generate a first time-dependent waveform representing a flow of blood within the patient;

    a second sensor configured to attach to the patient and generate a second time-dependent waveform representing contractile properties of the patient'"'"'s heart; and

    ,a processing component programmed to;

    i) determine a pulse transit time from a separation in time of a first feature of the first time-dependent waveform and a second feature of the second time-dependent waveform;

    ii) process the pressure, first, and second waveforms to determine a relationship between pulse transit time and blood pressure in the patient'"'"'s core region; and

    iii) determine a blood pressure in the patient'"'"'s core region from a pulse transit time and the relationship between pulse transit time and blood pressure in the patient'"'"'s core region using a mathematical model representative of blood pressure in said core region.

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