公开(公告)号：EP2757944B1

公开(公告)日：2018-12-12

申请号：EP12769284.6

申请日：2012-09-21

Applicant: Nellcor Puritan Bennett Ireland

Inventor： MCGONIGLE, Scott ,  ADDISON, Paul ,  OCHS, James ,  WATSON, James

IPC: A61B5/08 ,  A61B5/1455

CPC classification number: A61B5/0816 ,  A61B5/14551 ,  A61B5/7232 ,  A61B5/7239

Abstract: A patient monitoring system may receive a photoplethysmograph (PPG) signal including samples of a pulse waveform. The PPG signal may demonstrate morphology changes based on respiration. The system may calculate morphology metrics from the PPG signal, the first derivative of the PPG signal, the second derivative of the PPG signal, or any combination thereof. The morphology metrics may demonstrate amplitude modulation, baseline modulation, and frequency modulation of the PPG signal that is related to respiration. Morphology metric signals generated from the morphology metrics may be used to determine respiration information such as respiration rate.

公开(公告)号：EP2734112A1

公开(公告)日：2014-05-28

申请号：EP12743593.1

申请日：2012-07-20

Applicant: Nellcor Puritan Bennett Ireland

Inventor： OCHS, James ,  ADDISON, Paul ,  WATSON, James

IPC: A61B5/1455

CPC classification number: A61B5/726

Abstract: A patient monitoring system may be configured to use template matching in determining physiological parameters. A physiological signal may be monitored, and a wavelet transform may be performed. The wavelet transform, or parameters derived thereof such as energy distribution or relative phase difference, may be compared with one or more templates using template matching. Templates may be based on, for example, physiological data, mathematical models, or look-up tables, and may be pre-computed and stored. Physiological parameters may be determined based on the template matching results. Scale variability, confidence metrics, or both, may be used to aid in determining the physiological parameter.

公开(公告)号：EP2681673A2

公开(公告)日：2014-01-08

申请号：EP12708218.8

申请日：2012-02-28

Applicant: Nellcor Puritan Bennett Ireland

Inventor： OCHS, James ,  ADDISON, Paul ,  WATSON, James

IPC: G06F17/14 ,  A61B5/1455

CPC classification number: G06F17/148 ,  A61B5/14551 ,  A61B5/726 ,  H04B17/23 ,  H04B17/336

Abstract: Methods and systems are disclosed for tuning first and second wavelet functions to resolve at least one component of a signal. A first characteristic frequency corresponding to a first scale band of interest is determined, and a first wavelet function is tuned to the first characteristic frequency in at least a region of a first scale band of interest. A second characteristic frequency corresponding to a second scale band of interest is determined, and a second wavelet function is tuned to the second characteristic frequency in at least a region of the second scale band of interest. A signal is transformed for the first and second wavelet functions using a continuous wavelet transform to create a transform signal, and a scalogram is generated based at least in part on the transformed signal.