Diagnosing hypoxia by monitoring changes in oxygen saturation
First Claim
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1. A method of diagnosing a peripheral vascular disease condition comprising:
- measuring oxygen saturation in tissue of a patient;
analyzing the oxygen saturation in the tissue; and
determining a rate of change of the oxygen saturation in the tissueusing at least one processor, diagnosing the patient as having the peripheral vascular disease condition based on the rate of change of the oxygen saturation crossing a value in the tissue.
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Abstract
Hypoxia is diagnosed through measurements of oxygen saturation. Some examples of hypoxia conditions that may be diagnosed include peripheral vascular disease, multiple organ dysfunction syndrome, ischemia, hypotension, and arteriosclerosis. In a specific implementation, a hypoxia condition is diagnosed based on changes in oxygen saturation in tissue. Ischemia is induced, and then measurements of changes in oxygen saturation in tissue are made. Based on changes in oxygen saturation, a diagnosis is provided of whether a patient has or does not have a hypoxia condition.
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Citations
32 Claims
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1. A method of diagnosing a peripheral vascular disease condition comprising:
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measuring oxygen saturation in tissue of a patient; analyzing the oxygen saturation in the tissue; and determining a rate of change of the oxygen saturation in the tissue using at least one processor, diagnosing the patient as having the peripheral vascular disease condition based on the rate of change of the oxygen saturation crossing a value in the tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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measuring oxygen saturation of the tissue of the patient; determining a rate of change of the oxygen saturation in the tissue; and using at least one processor, diagnosing the patient as having a peripheral vascular disease condition based on the rate of change of the oxygen saturation crossing a value in the tissue during at least one phase of ischemia. - View Dependent Claims (17, 18, 19, 20)
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21. A system comprising:
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a probe comprising a first detector input; a computer, coupled to process signals received via the first detector input, to determine a rate of change of oxygen saturation crossing a value in tissue of a patient and make a diagnosis of a peripheral vascular disease based on the rate of change crossing a value; and a display, coupled to the computer, to provide a visual indication of a positive diagnosis of peripheral vascular disease. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification