SYSTEM AND METHOD FOR DETERMINING HEMODYNAMIC STATUS THROUGH A BLOOD PRESSURE RELATED INDEX
First Claim
1. A system for determining a hemodynamic status of an individual, the system comprising:
- a photoplethysmography (PPG) sub-system configured to detect a PPG signal;
a response triggering module configured to analyze the PPG signal and output one or more response triggers based on a changing feature of the PPG signal within a time window, wherein each of the one or more response triggers relates to an instruction to initiate detection of at least one physiological characteristic of the individual; and
a blood pressure (BP) variability index determination module configured to determine a BP variability index related to the hemodynamic status of the individual based on a frequency or pattern of the one or more response triggers.
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Accused Products
Abstract
A system for determining a hemodynamic status of an individual may include a photoplethysmography (PPG) sub-system configured to detect a PPG signal and a response triggering module configured to analyze the PPG signal and output one or more response triggers based on a changing feature of the PPG signal within a time window. Each of the one or more response triggers may relate to an instruction to initiate detection of at least one physiological characteristic of the individual. A blood pressure (BP) variability index determination module is configured to determine a BP variability index related to a hemodynamic status of the individual based on a frequency or pattern of the one or more response triggers.
5 Citations
18 Claims
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1. A system for determining a hemodynamic status of an individual, the system comprising:
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a photoplethysmography (PPG) sub-system configured to detect a PPG signal; a response triggering module configured to analyze the PPG signal and output one or more response triggers based on a changing feature of the PPG signal within a time window, wherein each of the one or more response triggers relates to an instruction to initiate detection of at least one physiological characteristic of the individual; and a blood pressure (BP) variability index determination module configured to determine a BP variability index related to the hemodynamic status of the individual based on a frequency or pattern of the one or more response triggers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for determining a hemodynamic status of an individual comprising:
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an input receiving a photoplethysmography (PPG) signal representing light absorption by a subject'"'"'s tissue; a trigger generated based on a change in a feature of the PPG signal, wherein the trigger indicates a probability of a change in blood pressure of the subject based on the change in the feature of the PPG signal; and a calculator outputting a blood pressure (BP) variability index based on a number or pattern of triggers generated over a period of time. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A system for determining a hemodynamic status of an individual, the system comprising:
at least one circuit or processor configured to determine whether to trigger a blood pressure (BP) measurement of the individual based on an analysis of a photoplethysmography (PPG) signal, and develop a BP variability index related to the hemodynamic status of the individual based on a number or pattern of triggered BP measurements within a time window. - View Dependent Claims (18)
Specification