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Method and apparatus for cufflessly and non-invasively measuring wrist blood pressure in association with communication device

  • US 8,086,301 B2
  • Filed: 03/11/2008
  • Issued: 12/27/2011
  • Est. Priority Date: 03/12/2007
  • Status: Expired due to Fees
First Claim
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1. A method of cufflessly and non-invasively measuring wrist blood pressure in association with a communication device, the method comprising:

  • (a) detecting an electrocardiogram (ECG) using an ECG sensor, detecting infrared pulse waves using an infrared sensor, and detecting pressure pulse wave signals using a pressure sensor, the ECG, infrared pulse waves and pressure pulse waves being detected from a wrist region of a user;

    (b) detecting feature points from the ECG, the infrared pulse waves and the pressure pulse wave signals detected in (a) from the user;

    (c) extracting variables for calculating a highest blood pressure and a lowest blood pressure by applying the feature points detected in step (b) to a blood pressure calculation algorithm; and

    (d) calculating the highest blood pressure and the lowest blood pressure of the user by deducing a scatter diagram using the extracted variables and compensating using absolute pressure to correct a magnitude of a detected pulse after comparing the infrared pulse wave signals to each other to obtain a vector component to search for a measured position and depth of an artery; and

    transmitting the calculated data to a portable communication device.

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