Paul S Addison and James N Watson 2004 Meas. Sci. Technol. 15 L15 doi:10.1088/0957-0233/15/11/L01
Paul S Addison and James N Watson
Show affiliationsWe present a novel time–frequency method for the measurement of oxygen saturation using the photoplethysmogram (PPG) signals from a standard pulse oximeter machine. The method utilizes the time–frequency transformation of the red and infrared PPGs to derive a 3D Lissajous figure. By selecting the optimal Lissajous, the method provides an inherently robust basis for the determination of oxygen saturation as regions of the time–frequency plane where high- and low-frequency signal artefacts are to be found are automatically avoided.
Issue 11 (November 2004)
Received 3 June 2004, in final form 13 August 2004
Published 8 October 2004
Paul S Addison and James N Watson 2004 Meas. Sci. Technol. 15 L15
R Mélin et al 1996 J. Phys. A: Math. Gen. 29 5773
J Dai et al 2000 J. Phys. D: Appl. Phys. 33 L65
Xinpu Chen et al 2009 Physiol. Meas. 30 1399
Seung-Mo Lee and Tai Hun Kwon 2006 Nanotechnology 17 3189
Chengxiang Ding et al 2007 J. Phys. A: Math. Theor. 40 3305
J Y Laval and T S Orlova 2003 Supercond. Sci. Technol. 16 1139
J L P Karthauser and P M Saffin 2006 Class. Quantum Grav. 23 4615
Carl J. Grillmair et al. 1998 The Astronomical Journal 115 144
R De Luca 2009 Supercond. Sci. Technol. 22 125010