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Blood pressure monitor

  • US 10,028,668 B2
  • Filed: 05/06/2015
  • Issued: 07/24/2018
  • Est. Priority Date: 05/06/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • sensing, with a first electrode and a second electrode configured to operate with a mobile computing device, a first electrocardiogram (ECG) of a subject;

    sensing, with an optical sensor configured to operate with said mobile computing device, a first photoplethysmogram (PPG) of said subject simultaneously to sensing said first ECG of said subject;

    sensing with said first electrode and said second electrode, a second ECG of said subject;

    sensing with said optical sensor, a second PPG of said subject simultaneously to sensing said second ECG;

    averaging said first ECG and said second ECG thereby generating an average QRS waveform;

    determining a first Pulse Arrival Time (PAT) using the average QRS waveform and the first PPG aligned with the average QRS waveform;

    determining a second PAT using the average QRS waveform and the second PPG aligned with the average QRS waveform; and

    determining a blood pressure of said subject based on a differential PAT comprising a difference between the first PAT and the second PAT.

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