Perfusion index smoother
DC CAFCFirst Claim
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1. A method of determining an indication of perfusion index in a patient monitor, the method comprising:
- 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;
wherein the final indication of perfusion index is determined by selecting the lowest indication of perfusion index.
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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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4 Claims
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1. 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; wherein the final indication of perfusion index is determined by selecting the lowest indication of perfusion index.
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2. 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; wherein determining the indication of perfusion index comprises choosing the calculation technique that will result in the lowest perfusion index value.
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3. 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, wherein the processor is configured to select the calculator which calculates the lowest indication of perfusion index. - View Dependent Claims (4)
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Specification