公开(公告)号：WO2022125171A1

公开(公告)日：2022-06-16

申请号：PCT/US2021/052835

申请日：2021-09-30

Applicant: QUALCOMM INCORPORATED [US]/[US]

Inventor： KITCHENS, Jack Conway ,  SCHNEIDER, John Keith ,  BRELOFF, Evan Michael ,  BROOKS, Emily Kathryn ,  GOJEVIC, Stephen Michael ,  JOHN ARCHIBALD, Fitzgerald ,  STOIANOV, Alexei ,  GORE, Shounak Uday ,  BUCHAN, Nicholas Ian

IPC: A61B5/00 ,  A61B5/021 ,  A61B5/0285

Abstract: Some disclosed methods involve controlling, via a control system, a light source system to emit a plurality of light pulses into biological tissue at a pulse repetition frequency, the biological tissue including blood and blood vessels at depths within the biological tissue. Such methods may involve receiving, by the control system, signals from the piezoelectric receiver corresponding to acoustic waves emitted from portions of the biological tissue, the acoustic waves corresponding to photoacoustic emissions from the blood and the blood vessels caused by the plurality of light pulses. Such methods may involve detecting, by the control system, heart rate waveforms in the signals, determining, by the control system, a first subset of detected heart rate waveforms corresponding to vein heart rate waveforms and determining, by the control system, a second subset of detected heart rate waveforms corresponding to artery heart rate waveforms.