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HANDHELD PHYSIOLOGICAL SENSOR

  • US 20170188849A1
  • Filed: 01/05/2016
  • Published: 07/06/2017
  • Est. Priority Date: 01/05/2016
  • Status: Active Grant
First Claim
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1. A biometric sensor configured to measure a blood pressure value from a patient, comprising:

  • an arm-receiving portion comprising a first opening configured to receive a distal portion of one of the patient'"'"'s arm and a first electrode configured and arranged to contact the distal portion of the patient'"'"'s arm when it is inserted in the first opening, the first electrode comprising a conductive material disposed on an inflatable bladder;

    a pressure-control system comprising a pump, a valve, and a pressure sensor connected to the inflatable bladder, the pressure-control system being configured to inflate and deflate the bladder in response to computer commands;

    a finger-receiving portion comprising a second opening, configured and arranged to receive a finger of said one of the patient'"'"'s arms while the distal portion thereof is received by the arm-receiving portion, and an optical system, the optical system comprising a first light source configured to irradiate the finger and a photodetector configured to receive radiation after it irradiates the finger;

    a body-contacting portion comprising an exterior-facing surface and a second electrode configured and arranged to contact a body location that is one of the patient'"'"'s torso, legs, opposing arm, and neck when the body-contacting portion is pressed against the second body location while the patient'"'"'s arm inserted in the first opening;

    a first analog system configured to receive biometric signals from the first electrode and the second electrode and to process them to generate an ECG waveform;

    a second analog system configured to receive signals from the pressure sensor and to process them to generate a pressure signal;

    a third analog system configured to receive signals from the photodetector and to process them to generate a photoplethysmogram waveform comprising pulsatile signals; and

    a processing system configured to issue computer commands to the pressure-control system to inflate and deflate the bladder while the third analog system generates the photoplethysmogram waveform, and further configured to analyze modulations in a digital versions of the photoplethysmogram waveform and a digital version of the pressure signal to estimate the blood pressure value.

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