Methods and systems for determining signal quality of a physiological signal
AssigneeCovidien LP
InventorsPaul Stanley Addison, James Nicholas Watson
Life of this patent
Estimating the term…
Abstract
A physiological monitoring system may use photonic signals at one or more wavelengths to determine physiological parameters. The system may receive a photoplethysmograph signal, and generated a difference signal based on the photoplethysmograph signal. The system may specify a segment of the photoplethysmograph signal and a segment of the difference signal. The system may associate each value of the segment of the photoplethysmograph signal to a corresponding value of the segment of the difference signal to generate associated value pairs. The system may compare the associated value pairs to a reference characteristic, and determine a signal quality metric based on the comparison.
Claims20
A method for determining signal quality of a physiological signal, the method comprising:
- receiving a photoplethysmograph signal;
- generating, using processing equipment, a difference signal based on the photoplethysmograph signal;
- specifying, using the processing equipment, a segment of the photoplethysmograph signal comprising a first plurality of values;
- specifying, using the processing equipment, a segment of the difference signal comprising a second plurality of values;
- associating, using the processing equipment, each value of the first plurality of values with a corresponding value of the second plurality of values to generate a plurality of associated value pairs;
- comparing, using the processing equipment, the plurality of associated value pairs to a reference characteristic;
- and
- determining, using the processing equipment, a signal quality metric based on the comparison.
A system for determining signal quality of a physiological signal, the system comprising:
- processing equipment configured to:
- receive a photoplethysmograph signal;
- generate a difference signal based on the photoplethysmograph signal;
- specify a segment of the photoplethysmograph signal comprising a first plurality of values;
- specify a segment of the difference signal comprising a second plurality of values;
- associate each value of the first plurality of values with a corresponding value of the second plurality of values to generate a plurality of associated value pairs;
- compare the plurality of associated value pairs to a reference characteristic;
- and
- determine a signal quality metric based on the comparison.
Dependencies are inferred from the claim text.