Kathleen H. Niebel,James Nicholas Watson,Paul Stanley Addison
申请号：
US14227594
公开号：
US20140323846A1
申请日:
2014.03.27
申请国别(地区):
US
年份:
2014
代理人:
摘要：
A system for determining a hemodynamic status of an individual may include a photoplethysmography (PPG) sub-system configured to detect a PPG signal and a response triggering module configured to analyze the PPG signal and output one or more response triggers based on a changing feature of the PPG signal within a time window. Each of the one or more response triggers may relate to an instruction to initiate detection of at least one physiological characteristic of the individual. A blood pressure (BP) variability index determination module is configured to determine a BP variability index related to a hemodynamic status of the individual based on a frequency or pattern of the one or more response triggers.
