Ori Tzvieli,Ari M Frank,Arie Tzvieli,Gil Thieberger
申请号：
US16453993
公开号：
US20190313915A1
申请日:
2019.06.26
申请国别(地区):
US
年份:
2019
代理人:
摘要：
Described herein are embodiments of a system and a method to calculate a user's physiological signal, such as blood pressure, cardiac output, or tissue perfusion. The system includes a head-mounted device configured to measure photoplethysmographic signal (PPG signal) at a region on the user's head, and a head-mounted camera configured to capture images indicative of the user's posture. Additionally, the system includes a computer configured to calculate the physiological signal based on the PPG signal and the user's posture. In some embodiments, the computer adjusts calculations of the physiological signal based on the user's posture, such that for the same PPG signal the computer outputs different values for the physiological signal for the following different postures: standing, sitting, and lying down.
