Pulse oximeter and sensor optimized for low saturation

a pulse oximeter and sensor technology, applied in the field of pulse oximeters and sensors optimized for low saturation, can solve the problems of low degree of accuracy in the estimation of saturation that is not clinically relevant, and pulse oximeters using led wavelengths paired from the 660 nm band and the 900 nm band all show reduced accuracy at low oxygen saturation. , to achieve the effect of minimizing the sensitivity to perturbation induced artifact, maximizing immunity to perturbation

a pulse oximeter and sensor technology, applied in the field of pulse oximeters and sensors optimized for low saturation, can solve the problems of low degree of accuracy in the estimation of saturation that is not clinically relevant, and pulse oximeters using led wavelengths paired from the 660 nm band and the 900 nm band all show reduced accuracy at low oxygen saturation. , to achieve the effect of minimizing the sensitivity to perturbation induced artifact, maximizing immunity to perturbation

US20060211929A1Inactive Publication Date: 2006-09-21CASCIANI JAMES R +3
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  • Pulse oximeter and sensor optimized for low saturation
  • Pulse oximeter and sensor optimized for low saturation
  • Pulse oximeter and sensor optimized for low saturation

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Embodiment Construction

[0007] According to exemplary embodiments of the invention, more accurate estimates of low arterial oxygen saturation using pulse oximetry are achieved by optimizing a wavelength spectrum of first and second light sources so that the saturation estimates at low saturation values are improved while the saturation estimates at high saturation values are minimally adversely affected as compared to using conventional first and second wavelength spectrums. It has been discovered that calculations at low saturation can be significantly improved if the anticipated or predicted rates of absorption and scattering of the first wavelength spectrum is brought closer to, optimally equal to, the anticipated or predicted rates of absorption and scattering of the second wavelength spectrum than otherwise exists when conventional wavelength spectrum pairs are chosen, such as when conventionally using a first wavelength centered near 660 nm and a second wavelength centered anywhere in the range of 88...

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Abstract

Embodiments of the present invention relate to a pulse oximeter sensor. Specifically, embodiments of the present invention include emitting infrared light from a first light source into tissue, the infrared light including an infrared wavelength spectrum useful for measuring oxygen saturation in a patient with high saturation, emitting far red light from a second light source into the tissue, the far red light including a wavelength between 700 and 790 nanometers, and detecting the infrared light and far red light from the first and second light sources with a detector after the light has been scattered by the tissue.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS [0001] This application is a continuation of U.S. application Ser. No. 10 / 698,962, filed Oct. 30, 2003, which is a continuation of U.S. application Ser. No. 09 / 882,371, filed Jun. 14, 2001, now U.S. Pat. No. 6,662,033, which is a continuation of U.S. application Ser. No. 09 / 003,413, filed Jan. 6, 1998, now U.S. Pat. No. 6,272,363, which is a continuation of U.S. application Ser. No. 08 / 413,578, filed Mar. 30, 1995, now U.S. Pat. No. 5,782,237, which is a continuation-in-part of U.S. application Ser. No. 08 / 221,911, filed Apr. 1, 1994, now U.S. Pat. No. 5,421,329, the disclosures of which are incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] Pulse oximetry is used to continuously monitor the arterial blood oxygen saturation of adults, pediatrics and neonates in the operating room, recovery room, intensive care units, and increasingly on the general floor. A need exists for pulse oximetry in the delivery room for monitoring th...

Claims

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Application Information

Patent Timeline
21 Sep 2006
Publication
US20060211929A1
IPC
A61B5/00
CPC
A61B5/14542; A61B5/1464; A61B5/7207; A61B2562/0242
Inventors
CASCIANI, JAMES R.; MANNHEIMER, PAUL D.