Design and evaluation of a new reflectance pulse oximeter sensor.
The design and construction of a new optical reflectance sensor suitable for noninvasive monitoring of arterial hemoglobin oxygen saturation with a pulse oximeter is described. The reflectance sensor was interfaced to a Datascope ACCUSAT pulse oximeter that was specially adapted for this study to perform as a reflectance oximeter. We evaluated the reflectance sensor in a group of 10 healthy adult volunteers. SpO2 obtained from the forehead with the reflectance pulse oximeter and SpO2 obtained from a finger sensor that was connected to a standard ACCUSAT transmittance pulse oximeter were compared simultaneously to arterial blood samples analyzed by an IL 282 CO-Oximeter. The equation for the best fitted linear regression line between the reflectance SpO2 and HbO2 values obtained from the reference IL 282 CO-Oximeter in the range between 62 and 100% was: SpO2 (%) = 4.78 +/- 0.96 (IL); n = 110. The regression analysis revealed a high degree of correlation (r = 0.98) and a relatively small standard error of the estimate (SEE = 1.82%). The mean and standard deviations for the difference between the reflectance SpO2 and IL 282 measurements was 1.38 and 1.85%, respectively. This study demonstrates the ability to acquire accurate SpO2 from the forehead using a reflectance sensor and a pulse oximeter.
Mendelson
Y
Y
Worcester Polytechnic Institute, Biomedical Engineering Program, MA 01609.
Kent
J C
JC
Yocum
B L
BL
Birle
M J
MJ
D000328:Adult; D004867:Equipment Design; D005385:Fingers; D005546:Forehead; D006801:Humans; D008027:Light; D010092:Oximetry / Q000295:instrumentation*; D012880:Skin Pigmentation; D014172:Transillumination / Q000379:methods*