Diagnosing peripheral vascular disease by monitoring oxygen saturation changes during an accumulation phase
First Claim
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1. A method of diagnosing peripheral vascular disease comprising:
- measuring oxygen saturation in tissue of a patient during an accumulation phase prior to ischemia;
analyzing the oxygen saturation in the tissue during the accumulation phase; and
diagnosing the patient as having peripheral vascular disease according to changes in the oxygen saturation in the tissue during the accumulation phase.
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Abstract
Peripheral vascular disease is diagnosed through measurements of oxygen saturation. In a specific implementation, peripheral vascular disease is diagnosed based on changes in oxygen saturation in tissue. Ischemia is induced, and measurements of changes in oxygen saturation in tissue are made. Based on changes in oxygen saturation during an accumulation phase, a diagnosis is provided of whether a patient has or does not have peripheral vascular disease.
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Citations
21 Claims
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1. A method of diagnosing peripheral vascular disease comprising:
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measuring oxygen saturation in tissue of a patient during an accumulation phase prior to ischemia; analyzing the oxygen saturation in the tissue during the accumulation phase; and diagnosing the patient as having peripheral vascular disease according to changes in the oxygen saturation in the tissue during the accumulation phase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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measuring oxygen saturation of the tissue of the patient during an accumulation phase prior to ischemia; and diagnosing the patient as having peripheral vascular disease based on changes in the oxygen saturation of the tissue during an accumulation phase before ischemia. - View Dependent Claims (10, 11, 12, 13)
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14. A system for diagnosing peripheral vascular disease 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 changes in oxygen saturation in tissue of a patient and make a diagnosis of peripheral vascular disease based on the oxygen saturation changes during an accumulation phase; a pressure cuff, attachable to the patient, to cause the accumulation phase in the patient; and a display, coupled to the computer, to provide a visual indication of a positive diagnosis of peripheral vascular disease. - View Dependent Claims (15, 16, 17)
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18. A system for diagnosing peripheral vascular disease 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 changes in oxygen saturation in tissue of a patient and make a diagnosis of peripheral vascular disease based on the oxygen saturation changes during an accumulation phase; and a display, coupled to the computer, to provide a visual indication of a positive diagnosis of peripheral vascular disease, wherein the diagnosis of peripheral vascular disease is positive when the computer determines a rate of change in the oxygen saturation crosses a threshold value during the accumulation phase before ischemia.
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19. A system for diagnosing peripheral vascular disease 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 changes in oxygen saturation in tissue of a patient and make a diagnosis of peripheral vascular disease based on the oxygen saturation changes during an accumulation phase; and a display, coupled to the computer, to provide a visual indication of a positive diagnosis of peripheral vascular disease, wherein the diagnosis of peripheral vascular disease is positive when a measured time for the oxygen saturation to cross a percentage value during the accumulation phase before ischemia exceeds a specific time value.
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20. A system for diagnosing peripheral vascular disease 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 changes in oxygen saturation in tissue of a patient and make a diagnosis of peripheral vascular disease based on the oxygen saturation changes during an accumulation phase; and a display, coupled to the computer, to provide a visual indication of a positive diagnosis of peripheral vascular disease, wherein the diagnosis of peripheral vascular disease is positive when a measured time, from a starting time value to an ending time value, for the oxygen saturation to cross a percentage value exceeds a specific time value, and the ending time is within the accumulation phase before ischemia.
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21. A system for diagnosing peripheral vascular disease 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 changes in oxygen saturation in tissue of a patient and make a diagnosis of peripheral vascular disease based on the oxygen saturation changes during an accumulation phase; and a display, coupled to the computer, to provide a visual indication of a positive diagnosis of peripheral vascular disease, wherein the diagnosis of peripheral vascular disease is positive when a measured time, from a starting time value to an ending time value, for the oxygen saturation to cross a percentage value exceeds a specific time value, and the starting time is within the accumulation phase before ischemia.
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Specification