Kevin R. Ward,Sardar Ansari,Lu Wang,Kayvan Najarian,Kenn Oldham
申请号：
US16344671
公开号：
US20200054221A1
申请日:
2017.10.25
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A wearable assembly has a pulse plethysmography (PPG) sensor and a piezoelectric pressure sensor and is attachable to a patient's finger or other area corresponding to a peripheralvascular region, and further includes a signal processor configured to monitor blood flow dependent measurements and pressure measurements over time, comparing these measurements to determine properties of the vascular region, such as vascular resistance of a blood vessel, vascular radius of the blood vessel, vascular stiffness of the vascular region, blood pressure, and/or cardiac vascular power. The signal processor may apply a hysteresis comparison of the sensor outputs, e.g., using an elliptical model, and in some examples may apply an extended Kalman filter for optimizing output of the vascular region properties.
