公开(公告)号：US20220015652A1

公开(公告)日：2022-01-20

申请号：US16928933

申请日：2020-07-14

Applicant: Apple Inc.

Inventor： Joseph R. Lee ,  Joseph M. Schmitt ,  Derek Young ,  Pranay Jain ,  Ali M. Amin ,  Wegene Tadele ,  Zijing Zeng

IPC: A61B5/022 ,  A61B5/00

Abstract: Embodiments are directed to a blood pressure measurement device including a cuff that is operative to wrap around a limb of a user, a bladder coupled to the cuff and operative to compress the limb of the user when inflated, and a piezoelectric sensor coupled to the cuff and operative to detect blood flow through the limb of the user and output a signal indicative of the blood flow. The blood pressure measurement device can also include a processor coupled with the piezoelectric sensor that is operative to filter the signal to isolate sounds corresponding to changes in the blood flow through the limb due to inflation of the bladder, correlate the isolated sounds with a pressure inside the bladder, and determine a blood pressure of the user at least partially based on correlating the isolated sounds with the pressure.