Devices and methods for non-invasive optical physiological measurements

摘要

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.

主权项

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 pressure
by: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.