公开(公告)号：WO1998015224A3

公开(公告)日：1998-04-16

申请号：PCT/US1997017818

申请日：1997-10-02

Applicant: NELLCOR PURITAN BENNETT INCORPORATED

Inventor： NELLCOR PURITAN BENNETT INCORPORATED ,  CHIN, Rodney ,  MANNHEIMER, Paul ,  FLEWELLING, Ross

IPC: A61B05/00

公开(公告)号：EP0951232A2

公开(公告)日：1999-10-27

申请号：EP97945463.0

申请日：1997-10-02

Applicant: Nellcor Puritan Bennett Incorporated

Inventor： CHIN, Rodney ,  MANNHEIMER, Paul ,  FLEWELLING, Ross

IPC: A61B5

CPC classification number: A61B5/14552 ,  A61B5/6826 ,  A61B5/6833 ,  A61B5/6838 ,  A61B5/7207

Abstract: A non-invasive optical sensor (40) which uses the motion signal to calculate the physiological characteristic being measured. For pulse oximetry, a least squares or a ratio-of-ratios technique can be applied to the motion signal itself. This is made possible by selecting a site on the patient where variations in motion produce signals of two wavelengths which are sufficiently correlated. In particular, it has been determined that a sensor (40) placed on a nail, in particular a thumbnail (42), exhibits the characteristics of having the red and infrared signals correlated when used for pulse oximetry, and the resulting signals correlate to arterial oxygen saturation.

公开(公告)号：EP0951232B1

公开(公告)日：2004-01-14

申请号：EP97945463.4

申请日：1997-10-02

Applicant: Nellcor Puritan Bennett Incorporated

Inventor： CHIN, Rodney ,  MANNHEIMER, Paul ,  FLEWELLING, Ross

IPC: A61B5/00

CPC classification number: A61B5/14552 ,  A61B5/6826 ,  A61B5/6833 ,  A61B5/6838 ,  A61B5/7207

Abstract: A non-invasive optical sensor (40) which uses the motion signal to calculate the physiological characteristic being measured. For pulse oximetry, a least squares or a ratio-of-ratios technique can be applied to the motion signal itself. This is made possible by selecting a site on the patient where variations in motion produce signals of two wavelengths which are sufficiently correlated. In particular, it has been determined that a sensor (40) placed on a nail, in particular a thumbnail (42), exhibits the characteristics of having the red and infrared signals correlated when used for pulse oximetry, and the resulting signals correlate to arterial oxygen saturation.