公开(公告)号：WO2003039340A3

公开(公告)日：2003-05-15

申请号：PCT/US2002/035223

申请日：2002-10-31

Applicant: NELLCOR PURITAN BENNETT INCORPORATED

Inventor： STETSON, Paul, F.

IPC: A61B5/00

Abstract: A method and apparatus for the application of Blind Source Separation (BSS), specifically Independent Component Analysis (ICA) to mixture signals obtained by a pulse oximeter sensor. In pulse oximetry, the signals measured at different wavelengths represent the mixture signals, while the plethysmographic signal, motion artifact, respiratory artifact and instrumental noise represent the source components. The BSS is carried out by a two-step method including an ICA. In the first step, the method uses Principal Component Analysis (PCA) as a preprocessing step, and the Principal Components are then used to derive sat and the Independent Components, where the Independent Components are determined in a second step. In one embodiment, the independent components are obtained by high-order decorrelation of the principal components, achieved by maximizing the sum of the squares of the higher-order cumulants of the plurality of mixture signals.

公开(公告)号：WO2004066161A1

公开(公告)日：2004-08-05

申请号：PCT/US2003/041467

申请日：2003-12-29

Applicant: NELLCOR PURITAN BENNETT INCORPORATED

Inventor： STETSON, Paul, F.

IPC: G06F17/00

CPC classification number: A61B5/14551 ,  A61B5/01 ,  A61B5/021 ,  A61B5/02416 ,  A61B5/14552 ,  A61B5/7203 ,  A61B5/7221 ,  A61B5/7239 ,  A61B5/725 ,  G06K9/00503

Abstract: Methods and devices for reducing noise effects in a system for measuring a physiological parameter, including receiving an input signal; obtaining an assessment of the signal quality of the input signal; selecting coefficients for a digital filter using the assessment of signal quality; and filtering the input signal using the digital filter, without comparing the filter's output signal with the input signal.

Abstract translation: 用于减少用于测量生理参数的系统中的噪声影响的方法和装置，包括接收输入信号; 获得对输入信号的信号质量的评估; 使用信号质量评估来选择数字滤波器的系数; 并使用数字滤波器对输入信号进行滤波，而不将滤波器的输出信号与输入信号进行比较。

公开(公告)号：EP1450676B1

公开(公告)日：2008-02-13

申请号：EP02802829.8

申请日：2002-10-31

Applicant: Nellcor Puritan Bennett Incorporated

Inventor： STETSON, Paul, F.

IPC: A61B5/00

CPC classification number: A61B5/14551 ,  A61B5/02416 ,  A61B5/7207 ,  A61B5/7239

Abstract: A method and apparatus for the application of Blind Source Separation (BSS), specifically Independent Component Analysis (ICA) to mixture signals obtained by a pulse oximeter sensor. In pulse oximetry, the signals measured at different wavelengths represent the mixture signals, while the plethysmographic signal, motion artifact, respiratory artifact and instrumental noise represent the source components. The BSS is carried out by a two-step method including an ICA. In the first step, the method uses Principal Component Analysis (PCA) as a preprocessing step, and the Principal Components are then used to derive sat and the Independent Components, where the Independent Components are determined in a second step. In one embodiment, the independent components are obtained by high-order decorrelation of the principal components, achieved by maximizing the sum of the squares of the higher-order cumulants of the plurality of mixture signals.

公开(公告)号：EP1586051A1

公开(公告)日：2005-10-19

申请号：EP03800274.7

申请日：2003-12-29

Applicant: Nellcor Puritan Bennett Incorporated

Inventor： STETSON, Paul, F.

IPC: G06F17/00 ,  A61B5/00

CPC classification number: A61B5/14551 ,  A61B5/01 ,  A61B5/021 ,  A61B5/02416 ,  A61B5/14552 ,  A61B5/7203 ,  A61B5/7221 ,  A61B5/7239 ,  A61B5/725 ,  G06K9/00503

Abstract: Methods and devices for reducing noise effects in a system for measuring a physiological parameter, including receiving an input signal; obtaining an assessment of the signal quality of the input signal; selecting coefficients for a digital filter using the assessment of signal quality; and filtering the input signal using the digital filter, without comparing the filter's output signal with the input signal.

公开(公告)号：EP1450676A2

公开(公告)日：2004-09-01

申请号：EP02802829.8

申请日：2002-10-31

Applicant: Nellcor Puritan Bennett Incorporated

Inventor： STETSON, Paul, F.

IPC: A61B5/00

CPC classification number: A61B5/14551 ,  A61B5/02416 ,  A61B5/7207 ,  A61B5/7239

Abstract: A method and apparatus for the application of Blind Source Separation (BSS), specifically Independent Component Analysis (ICA) to mixture signals obtained by a pulse oximeter sensor. In pulse oximetry, the signals measured at different wavelengths represent the mixture signals, while the plethysmographic signal, motion artifact, respiratory artifact and instrumental noise represent the source components. The BSS is carried out by a two-step method including an ICA. In the first step, the method uses Principal Component Analysis (PCA) as a preprocessing step, and the Principal Components are then used to derive sat and the Independent Components, where the Independent Components are determined in a second step. In one embodiment, the independent components are obtained by high-order decorrelation of the principal components, achieved by maximizing the sum of the squares of the higher-order cumulants of the plurality of mixture signals.