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US 11,759,130 B2Granted
Perfusion index smoother
AssigneeMasimo Corporation
InventorAmmar Al-Ali
Life of this patent
Estimating the term…
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.
Claims17
An oximeter system comprising:
- an input capable of receiving intensity signal data responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue;
- and
- a processor configured to:
- determine one or more indications of pulse information from the intensity signal data received at the input;
- determine a first indication of amplitude data on a pulse by pulse basis based on the one or more indications of pulse information;
- determine a second indication of amplitude data based on a second technique using the one or more indications of pulse information;
- determine a final indication of amplitude data based on the first and second indications by selecting a lowest indication of amplitude from the first and second indications, averaging the first and second indications of amplitude, or using a statistical analysis of the first and second indications of amplitude;
- and
- output the final indication as an indication of perfusion index.
6 more elements
A patient monitor system, comprising:
- an input configured to receive pleth data;
- and
- a processor in communication with the input, the processor configured to:
- calculate at least two indications of perfusion index based on the pleth data using at least two different calculation techniques, wherein at least one of the calculation techniques performs analysis on a combination of pulses;
- and
- determine a final indication of perfusion index based on the at least two indications of perfusion index, the final indication determined based on a signal quality, the lowest determined value of the at least two indications of perfusion index, an average of the at least two indications of perfusion index or a statistical analysis of the at least two indications of perfusion index.
3 more elements
Dependencies are inferred from the claim text.