PERFUSION INDEX SMOOTHER
First Claim
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1. A method of smoothing a perfusion index measurement in an oximeter system, the method comprising:
- establishing a baseline perfusion index during quality signal conditions of a signal responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue, and leveraging the baseline perfusion index during poor signal conditions.
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Abstract
An embodiment of the present disclosure seeks to smooth a perfusion index measurement through use of a baseline perfusion index measurement and/or through the use of multiple PI calculations. The combination of the baseline perfusion index measurement reduces an error between a calculated measurement of PI and actual conditions.
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Citations
25 Claims
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1. A method of smoothing a perfusion index measurement in an oximeter system, the method comprising:
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establishing a baseline perfusion index during quality signal conditions of a signal responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue, and leveraging the baseline perfusion index during poor signal conditions. - View Dependent Claims (2, 3, 4)
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5. An oximeter comprising:
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an input capable of receiving intensity signal data responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue, a memory storing a baseline Perfusion Index (PI); and
a processor programmed to output said baseline PI when said signal data includes motion-induced noise and a current PI derived from said signal data is not lower than said baseline PI. - View Dependent Claims (6, 7)
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8. A method of determining an indication of perfusion index in a patient monitor, the method comprising:
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receiving pleth data;
calculating at least two indications of perfusion index using at least two different calculation techniques; and
determining a final indication of perfusion index based on the at least two indications of perfusion index. - View Dependent Claims (9, 10, 11)
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12. A method of determining an indication of perfusion index, the method comprising:
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receiving pleth data; and
determining an indication of perfusion index by utilizing at least one of a first calculation technique and a second calculation technique to determine a resulting indication of perfusion index. - View Dependent Claims (13)
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14. An oximeter comprising:
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an input capable of receiving intensity signal data responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue, a first calculation calculator configured to calculate a first indication of perfusion index using a first calculation technique;
a second calculator configured to calculate a second indication of perfusion index using a second calculation technique; and
a processor configured to utilize at least one of the first and second calculators to determine a resulting indication of perfusion index. - View Dependent Claims (15, 16, 17)
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18. A method of determining an indication of a physiological condition using data responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue, the method comprising:
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determining one or more indications of pulse information from data responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue;
determining a first indication of amplitude data for a pulse based on the one or more indications of pulse information;
determining a second indication of amplitude data for a combination of pulses based on the one or more indications of pulse information;
determining a final indication of amplitude data based on the first and second indications; and
outputting the final indication as an indication of perfusion index. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification