Surgery – Truss – Pad
Patent
1995-03-30
1998-07-21
Nasser, Robert L.
Surgery
Truss
Pad
128665, 356 41, A61B 500
Patent
active
057822379
ABSTRACT:
A pulse oximeter sensor with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red and an infrared light source are used, with the red light source having a mean wavelength between 700-790 nm. The infrared light source can have a mean wavelength as in prior art devices used on patients with high saturation. The sensor of the present invention is further optimized by arranging the spacing between the light emitter and light detectors to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the presence of perturbation artifacts including force variations, tissue variations and variations in the oxygen saturation itself.
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Casciani James R.
Mannheimer Paul D.
Nierlich Steve L.
Ruskewicz Stephen J.
Nasser Robert L.
Nellcor Puritan Bennett Incorporated
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