Methods and systems for detecting a sensor-off condition using interference components
AssigneeCovidien LP
InventorsPaul Stanley Addison, James Nicholas Watson
Life of this patent
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Abstract
A physiological monitoring system may use photonic signals at one or more wavelengths to determine physiological parameters. During monitoring, a physiological sensor may become improperly positioned, which may affect the physiological attenuation of the photonic signals, and accordingly a detected light signal. The detected light signal may include an ambient light component and a signal component corresponding to the one or more wavelengths of light. One or both components may exhibit an interference signal component caused by environmental light. The physiological monitoring system may analyze the interference signal components to determine a sensor-off condition.
Claims20
A method for determining whether a physiological sensor is properly positioned on a subject, the method comprising:
- receiving a detected light signal, wherein the detected light signal comprises an ambient light signal component and a signal component corresponding to a wavelength of light emitted by the physiological sensor;
- processing the detected light signal, using processing equipment, to generate a first signal corresponding to at least the ambient light signal component;
- identifying, using the processing equipment, at least one first interference signal component based at least in part on the first signal, wherein the interference signal component corresponds to non-physiological information;
- analyzing, using the processing equipment, the interference signal component;
- and
- determining, using the processing equipment, whether the physiological sensor is properly positioned based at least in part on the analysis.
A system for determining whether a physiological sensor is properly positioned on a subject, the system comprising:
- processing equipment configured to:
- receive a detected light signal, wherein the detected light signal comprises an ambient light signal component and a signal component corresponding to a wavelength of light emitted by the physiological sensor;
- process the detected light signal to generate a first signal corresponding to the ambient light signal component;
- identify at least one first interference signal component based at least in part on the first signal, wherein the interference signal component corresponds to non-physiological information;
- analyze the first interference signal component;
- and
- determine whether the physiological sensor is properly positioned based at least in part on the analysis.
Dependencies are inferred from the claim text.