Pulse Oximetry
First Claim
1. A method for performing a pulse oximetry, the method comprising:
- emitting a light signal for a period of time;
detecting a modulated light signal, the modulated light signal including a red signal and an infrared signal originating from an interaction of the light signal with a human tissue, the human tissue including a pulsatile tissue and a non-pulsatile tissue; and
processing the modulated light signal to estimate at least an oxygen saturation in the pulsatile tissue during the period of time, wherein the processing includes at least removing a non-pulsatile component resulting from the interaction of the light signal with the non-pulsatile tissue.
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Accused Products
Abstract
Provided are a method and systems for performing pulse oximetry. A light signal is emitted for a period of time and a modulated light signal is detected. The modulated light signal includes a red signal and an infrared signal. The modulated light signal is originated by an interaction of the light signal with a pulsatile tissue and a non-pulsatile tissue. The modulated light signal is processed to estimate an oxygen saturation in the pulsatile tissue during the period of time. The processing includes removing a non-pulsatile component resulting from the interaction of the light signal and the non-pulsatile tissue. The non-pulsatile component can be removed by removing a first parameter from an intensity of the infrared signal and a second parameter from an intensity of the red signal. The parameters are pre-determined using a calibration process to reproduce a true value for a ratio used to determine the oxygen saturation.
25 Citations
22 Claims
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1. A method for performing a pulse oximetry, the method comprising:
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emitting a light signal for a period of time; detecting a modulated light signal, the modulated light signal including a red signal and an infrared signal originating from an interaction of the light signal with a human tissue, the human tissue including a pulsatile tissue and a non-pulsatile tissue; and processing the modulated light signal to estimate at least an oxygen saturation in the pulsatile tissue during the period of time, wherein the processing includes at least removing a non-pulsatile component resulting from the interaction of the light signal with the non-pulsatile tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for performing a pulse oximetry, the system comprising:
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at least one light source operable to emit a light signal for a period of time; at least one optical sensor operable to detect a modulated light signal, the modulated light signal including a red signal and an infrared signal originating from an interaction of the light signal with a human tissue, the human tissue including a pulsatile tissue and a non-pulsatile tissue; and at least one processor communicatively coupled to the at least one optical sensor and operable to process the modulated light signal to estimate at least an oxygen saturation in the pulsatile tissue during the period of time, wherein the processing includes at least removing a non-pulsatile component due to the interaction of the light signal with the non-pulsatile tissue. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A non-transitory computer-readable storage medium having embodied thereon instructions, which when executed by a processor, perform steps of a method, the method comprising:
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emitting a light signal for a period of time; detecting a modulated light signal, the modulated light signal including a red signal and an infrared signal originating from an interaction of the light signal with a human tissue, the human tissue including a pulsatile tissue and a non-pulsatile tissue; and processing the modulated light signal to estimate at least an oxygen saturation in the pulsatile tissue during the time period, wherein the processing includes at least removing a non-pulsatile component due to the interaction of the light signal with the non-pulsatile tissue.
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Specification