公开(公告)号：US20210321889A1

公开(公告)日：2021-10-21

申请号：US17210371

申请日：2021-03-23

Applicant: Apple Inc.

Inventor： Pranay Jain ,  Nicholas R. Trincia ,  Chia-Hsien Lin ,  Zijing Zeng

IPC: A61B5/022 ,  A61B5/0235 ,  A61B5/00

Abstract: Embodiments include a blood pressure measurement device that includes a cuff for measuring blood pressure of a user. The cuff may include a bladder assembly configured to retain a fluid within an internal chamber where the bladder assembly is formed from a first cell defining a first portion of the internal chamber that is connected with a second cell defining a second portion of the internal chamber. The bladder assembly can also include a fluid passage that is in fluid communication with the first cell and the second cell and coupled with a reservoir. The bladder assembly can exchange the fluid with the reservoir and be configured to increase in length when a volume of the fluid in the internal chamber decreases, and decrease in length when the volume of the fluid in the internal chamber increases.