Register USPTO Patent
Application Number 17196983
Status Pending
Filing Date 2021-03-09
First Publication Date 2021-12-02
Publication Date 2021-12-02
Owner Fitbit, Inc. (USA)
  • Pantelopoulos, Alexandros A.
  • Axley, Andrew Larsen


Disclosed are devices and methods for non-invasively measuring arterial stiffness using pulse wave analysis of photoplethysmogram data. In some implementations, wearable biometric monitoring devices provided herein for measuring arterial stiffness have the ability to automatically and intelligently obtain PPG data under suitable conditions while the user is engaged in activities or exercises. In some implementations, wearable biometric monitoring devices are provided herein with the ability to remove PPG data variance caused by factors unrelated to arterial stiffness. In some implementations, wearable biometric monitoring devices have the ability to perform PWA while accounting for the user's activities, conditions, or status.

IPC Classes  ?

  • A61B 5/024 - Measuring pulse rate or heart rate
  • A61B 5/021 - Measuring pressure in heart or blood vessels
  • A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
  • A61B 5/02 - Measuring pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography; Heart catheters for measuring blood pressure