Ravi Narasimhan,Richard C. Kimoto,Thomas J. Sullivan,Todd K. Whitehurst,Derek Park-shing Young,Zijing Zeng,Erno Klaassen
申请号：
US15507607
公开号：
US10517489B2
申请日:
2015.09.08
申请国别(地区):
US
年份:
2019
代理人:
摘要：
Wrist-worn devices and related methods measure a pulse transit time non-invasively and calculate a blood pressure value using the pulse transit time. A wrist-worn device includes an accelerometer, a photo-lethysmogram (PPG) or a pulse pressure sensor, and a controller. The PPG or the pulse pressure sensor coupled to the wrist-worn device for detecting an arrival of a blood pressure pulse at the user's wrist. The controller is configured to process output signals from the accelerometer to detect when the blood pressure pulse is propagated from the left ventricle of the user's heart, process a signal from the PPG or the pulse pressure sensor to detect when the blood pressure pulse arrives at the wrist, calculate a pulse transit time (PTT) for propagation of the blood pressure pulse from the left ventricle to the wrist, and generate one or more blood pressure values for the user based on the PTT.
