METHOD AND APPARATUS FOR DETERMINING AN OXYGEN DESATURATION EVENT
First Claim
1. A method for determining an index indicative of a subject'"'"'s response to an oxygen desaturation condition, the method comprising the steps of:
- providing a NIRS tissue sensor, a pulse oximetry sensor, and a processor in communication with the NIRS tissue sensor and the pulse oximetry sensor;
sensing the subject'"'"'s tissue using the NIRS tissue sensor during a period of time, and producing first signals that are indicative of a tissue oxygen saturation value during the period of time;
sensing the subject'"'"'s tissue using the pulse oximetry sensor during the period of time, and producing second signals that are indicative of the subject'"'"'s arterial oxygen saturation during the period of time;
processing the first signals to determine a change in tissue oxygen saturation values over the period of time, processing the second signals to determine a change in arterial oxygen saturation values over the period of time; and
determining the index indicative of the subject'"'"'s response to the oxygen desaturation condition using the change in tissue oxygen saturation values and the change in arterial oxygen saturation values.
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Accused Products
Abstract
A method and apparatus for determining an index indicative of a subject'"'"'s response to an oxygen desaturation condition is provided. The method includes the steps of: a) providing a NIRS tissue sensor, a pulse oximetry sensor, and a processor in communication with the NIRS tissue sensor and the pulse oximetry sensor; b) sensing the subject'"'"'s tissue using the NIRS tissue sensor and producing first signals; c) sensing the subject'"'"'s tissue using the pulse oximetry sensor and producing second signals; d) processing the first signals to determine a change in tissue oxygen saturation values, processing the second signals to determine a change in arterial oxygen saturation values; and e) determining the index indicative of the subject'"'"'s response to the oxygen desaturation condition using the change in tissue oxygen saturation values and the change in arterial oxygen saturation values.
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Citations
20 Claims
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1. A method for determining an index indicative of a subject'"'"'s response to an oxygen desaturation condition, the method comprising the steps of:
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providing a NIRS tissue sensor, a pulse oximetry sensor, and a processor in communication with the NIRS tissue sensor and the pulse oximetry sensor; sensing the subject'"'"'s tissue using the NIRS tissue sensor during a period of time, and producing first signals that are indicative of a tissue oxygen saturation value during the period of time; sensing the subject'"'"'s tissue using the pulse oximetry sensor during the period of time, and producing second signals that are indicative of the subject'"'"'s arterial oxygen saturation during the period of time; processing the first signals to determine a change in tissue oxygen saturation values over the period of time, processing the second signals to determine a change in arterial oxygen saturation values over the period of time; and determining the index indicative of the subject'"'"'s response to the oxygen desaturation condition using the change in tissue oxygen saturation values and the change in arterial oxygen saturation values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for non-invasively determining the ability of a subject to adapt to brief systemic hypoxia and/or ischemia events, or a longer term adaptation to abnormal physiology, the method comprising the steps of:
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providing a NIRS tissue sensor, a pulse oximetry sensor, and a processor in communication with the NIRS tissue sensor and the pulse oximetry sensor; sensing the subject'"'"'s tissue using the NIRS tissue sensor, and producing a first signal that is indicative of an oxygen saturation value of the subject'"'"'s tissue; sensing the tissue using the pulse oximetry sensor, and producing a second signal that is indicative of the subject'"'"'s arterial oxygen saturation; processing the first and second signals to determine a mean tissue oxygen saturation value for each of a number of predetermined arterial oxygen saturation values; calculating a rate of change between the mean tissue oxygen saturation values and a rate of change for the arterial oxygen saturation values corresponding to the tissue oxygen saturation values; and determining an ability of the subject'"'"'s body to adapt to systemic hypoxia events.
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11. An apparatus for determining an index indicative of the subject'"'"'s response to an oxygen desaturation condition, comprising:
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a NIRS tissue sensor operable to sense the subject'"'"'s tissue during a period of time, and produce first signals indicative of a tissue oxygen saturation value during the period of time; a pulse oximetry sensor operable to sense the subject'"'"'s tissue during the period of time, and produce second signals indicative of the subject'"'"'s arterial oxygen saturation during the period of time; and a processor in communication with the NIRS tissue sensor and the pulse oximetry sensor, which processor is adapted to process the first signals to determine a change in tissue oxygen saturation values over the period of time, and to process the second signals to determine a change in arterial oxygen saturation values over the period of time, and to determine the index indicative of the subject'"'"'s response to an oxygen desaturation condition using the change in tissue oxygen saturation values and the change in arterial oxygen saturation values. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus for non-invasively determining the ability of a subject to adapt to brief systemic hypoxia and/or ischemia event, or an longer term adaptation to abnormal physiology, comprising:
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a NIRS tissue sensor operable to sense the subject'"'"'s tissue and produce a first signal indicative of an oxygen saturation value of the subject'"'"'s tissue; a pulse oximetry sensor operable to sense tissue of the subject, and produce a second signal that is indicative of the subject'"'"'s arterial oxygen saturation; and a processor in communication with the NIRS tissue sensor and the pulse oximetry sensor, which processor is adapted to process the first and second signals to determine a mean tissue oxygen saturation value for each of a number of predetermined arterial oxygen saturation values, and to calculate a rate of change between the mean tissue oxygen saturation values and a rate of change for the arterial oxygen saturation values corresponding to the tissue oxygen saturation values, and to determine an ability of the subject'"'"'s body to adapt to brief systemic hypoxia and/or ischemia event, or an longer term adaptation to abnormal physiology.
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Specification