System and Method for Differentiating Between Tissue-Specific and Systemic Causes of Changes in Oxygen Saturation in Tissue and Organs
First Claim
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1. A method for classifying a condition causing a change in oxygen saturation of hemoglobin in a target area of a body of a person or animal as either a systemic condition or a local condition, comprising:
- identifying a target area and a reference area on the body of a human or animal, where said target area is chosen from the group consisting of tissue and organs and wherein said reference area includes shallow tissue located above the target area such that the tissue or organ chosen for said target area is different from the shallow tissue of said reference area;
periodically measuring oxygen saturation in the target area and an oxygen saturation in the reference area;
comparing the oxygen saturation in the target area to the oxygen saturation in the reference area; and
classifying the condition causing the change in oxygen saturation of hemoglobin in the target area as systemic or local based upon said comparison.
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Abstract
A method for monitoring oxygen saturation that includes the following steps: (i) measuring an oxygen saturation of a target area of a person or animal over time; (ii) measuring an oxygen saturation of a reference area of the person or animal over time; and (iii) classifying the oxygen saturation status of the target area based upon a comparison of the oxygen saturation of the target area relative to the oxygen saturation of the reference area over time.
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Citations
19 Claims
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1. A method for classifying a condition causing a change in oxygen saturation of hemoglobin in a target area of a body of a person or animal as either a systemic condition or a local condition, comprising:
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identifying a target area and a reference area on the body of a human or animal, where said target area is chosen from the group consisting of tissue and organs and wherein said reference area includes shallow tissue located above the target area such that the tissue or organ chosen for said target area is different from the shallow tissue of said reference area; periodically measuring oxygen saturation in the target area and an oxygen saturation in the reference area; comparing the oxygen saturation in the target area to the oxygen saturation in the reference area; and classifying the condition causing the change in oxygen saturation of hemoglobin in the target area as systemic or local based upon said comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for monitoring oxygen saturation, comprising:
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measuring an oxygen saturation of a target area of a person or animal over time, where said target area is chosen from the group consisting of tissue and organs; measuring an oxygen saturation of a reference area of the person or animal over time, where said reference area includes shallow tissue located above said target area, wherein the shallow tissue of said reference area is different from the tissue or organs chosen for said target area; and classifying the oxygen saturation status of the target area based upon a comparison of the oxygen saturation of the target area relative to the oxygen saturation of the reference area over time, wherein the oxygen saturation status indicates an impending shock state of the target area; wherein measuring an oxygen saturation of a target area includes receiving signals from a first NIRS sensor. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for classifying a condition causing a change in blood flow determined by oxygen saturation of hemoglobin in a target area of a body of a person or animal as either a systemic condition or a local condition, comprising:
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identifying a target area and a reference area on the body of a human or animal, wherein the target area includes an organ or tissue and wherein the reference area includes shallow tissue different from the organ or tissue of said target area and located near said target area; periodically measuring oxygen saturation in the target area, including receiving signals from a first NIRS sensor, and measuring an oxygen saturation in the reference area; comparing the oxygen saturation in the target area to the oxygen saturation in the reference area; and classifying the condition causing the change in blood flow in the target area as systemic or local based upon said comparison. - View Dependent Claims (17, 18, 19)
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Specification