公开(公告)号：US20230000369A1

公开(公告)日：2023-01-05

申请号：US17939413

申请日：2022-09-07

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Shaoxiong SUN ,  Wouter Herman PEETERS ,  Rick BEZEMER

IPC: A61B5/021 ,  A61B5/00

Abstract: The present invention relates to a device, system and method for determining pulse pressure variation of a subject. To enable more reliably determining pulse pressure variation of a subject the device comprises a signal input (11) configured to obtain an input signal representing a hemodynamic signal of the subject, a processor (12) configured to process the input signal and compute a pulse pressure variation and a signal output (13) configured to output the computed pulse pressure variation. The pulse pressure variation is computed by deriving a pulse height signal from the input signal, deriving a pulse height baseline and a de-trended pulse height signal from the pulse height signal as the ratio between the difference between extrema of the de-trended pulse height signal and the respective value of the pulse height baseline signal, and computing the pulse pressure variation from the de-trended pulse height signal and the pulse height baseline.

公开(公告)号：US20200260967A1

公开(公告)日：2020-08-20

申请号：US16651568

申请日：2018-09-18

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Shaoxiong SUN ,  Wouter Herman PEETERS ,  Rick BEZEMER ,  Xi LONG ,  Ronaldus Maria AARTS

IPC: A61B5/026 ,  A61B5/024 ,  A61B5/00 ,  A61B5/0295

Abstract: In a sensor system (12), output signals of at least one PPG sensor (14) are processed to derive a modified pulse amplitude variation (PAV) value, being modified to take account of a baseline variation of the PPG sensor output signal. In particular, the modified PAV is derived through performing a modification step (42) in which either: a baseline variation of the PPG sensor output is derived and combined with a previously derived PAV, or, a PPG sensor output is first processed to perform baseline variation compensation, in advance of then deriving a PAV from the compensated signal.