Devices and methods for non-invasive optical physiological measurements
First Claim
1. An optical measurement device comprising:
- an illumination and detection assembly configured to output light to a portion of living tissue of a user and detect transmitted or reflected light as a signal; and
a pressure assembly configured to detect an amount of pressure applied to the illumination and detection assembly by the portion of living tissue of the user,wherein the illumination and detection assembly and the pressure assembly are capable of communicating with a feedback unit configured to correlate a quality of the detected signal with the amount of applied pressureby;
computing an area under waveforms of detected signals corresponding to a variety of applied pressure amounts, anddetermining an optimum pressure to correspond a largest computed area, from the variety of applied pressure amounts,wherein the feedback unit is further configured to provide a feedback related to the optimum pressure to the user.
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Accused Products
Abstract
An optical measurement device and method of use provides non-invasive physiological measurements from a predetermined location on a body part of a user. The optical measurement device provides an illumination and detection assembly configured to generate and detect light of a predetermined wavelength range in the form of a photoplethysmography (PPG) signal, as well as a pressure detection assembly configured to detect an amount of pressure applied to the measurement device by the user being measured. A feedback unit, such as a portable display device, provides the user real-time feedback of the detected PPG signal and level of applied pressure so that the user may adjust the amount of applied pressure to improve the quality of the detected PPG signal.
33 Citations
38 Claims
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1. An optical measurement device comprising:
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an illumination and detection assembly configured to output light to a portion of living tissue of a user and detect transmitted or reflected light as a signal; and a pressure assembly configured to detect an amount of pressure applied to the illumination and detection assembly by the portion of living tissue of the user, wherein the illumination and detection assembly and the pressure assembly are capable of communicating with a feedback unit configured to correlate a quality of the detected signal with the amount of applied pressure by; computing an area under waveforms of detected signals corresponding to a variety of applied pressure amounts, and determining an optimum pressure to correspond a largest computed area, from the variety of applied pressure amounts, wherein the feedback unit is further configured to provide a feedback related to the optimum pressure to the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for detecting a physiological signal using an optical measurement device, the method comprising:
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illuminating a portion of living tissue of a user and detecting transmitted or reflected light as a signal using an illumination and detection assembly; detecting an amount of pressure applied by the portion of living tissue of the user to the illumination and detection assembly using a pressure detection assembly; and correlating a quality of the detected signal with the amount of applied pressure; computing an area under waveforms of detected signals corresponding to a variety of applied pressure amounts, and determining an optimum pressure to correspond a largest computed area, from the variety of applied pressure amounts. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A computer program product for detecting a physiological signal using an optical measurement device, the computer program product embodied on a computer readable medium and when executed by a computer with a processor and a memory, performs the method comprising:
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illuminating a portion of living tissue of a user and detecting transmitted or reflected light as a signal using an illumination and detection assembly; detecting an amount of pressure applied by the portion of living tissue of the user to the illumination and detection assembly; and correlating a quality of the detected signal with the amount of applied pressure; computing an area under waveforms of detected signals corresponding to a variety of applied pressure amounts, and determining an optimum pressure to correspond a largest computed area, from the variety of applied pressure amounts. - View Dependent Claims (37)
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38. An optical measurement system comprising:
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an optical measurement device comprising; an illumination and detection assembly configured to output light to a portion of living tissue of a user and detect transmitted or reflected light as a signal; and a pressure assembly configured to detect an amount of pressure applied to the illumination and detection assembly by the portion of living tissue of the user; and a feedback unit connected to the optical measurement device, and configured to correlate a quality of the detected signal with the amount of applied pressure by; computing an area under waveforms of detected signals corresponding to a variety of applied pressure amounts, and determining an optimum pressure to correspond a largest computed area, from the variety of applied pressure amounts, wherein the feedback unit is further configured to provide a feedback related to the optimum pressure to the user.
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Specification