Sensor verification through forward voltage measurements
AssigneeCovidien LP
InventorsChristopher J. Meehan, Jacob D. Dove
Life of this patent
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Abstract
A device for measuring oxygen saturation includes circuitry configured to determine a measured difference of forward voltage based on a first forward voltage at a first light emitting diode and a second forward voltage a second light emitting diode and determine that the first and second light emitting diodes are valid based on a calibrated difference of forward voltage and the measured difference of forward voltage. In response to the determination that the first and second light emitting diodes are valid, the circuitry is configured to determine an oxygen saturation level.
Claims20
A device for measuring oxygen saturation, the device comprising:
- a memory configured to store a calibrated difference of forward voltage;
- and
- circuitry configured to:
- determine a measured difference of forward voltage based on a first forward voltage at a first light emitting diode and a second forward voltage at a second light emitting diode;
- determine that the first light emitting diode and the second light emitting diode are valid based on the calibrated difference of forward voltage and the measured difference of forward voltage;
- and
- in response to the determination that the first light emitting diode and the second light emitting diode are valid, determine an oxygen saturation level using the first light emitting diode and the second light emitting diode and output an indication of the oxygen saturation level.
A method for measuring oxygen saturation, the method comprising:
- determining, by circuitry, a measured difference of forward voltage based on a first forward voltage at a first light emitting diode and a second forward voltage at a second light emitting diode;
- determining, by the circuitry, that the first light emitting diode and the second light emitting diode are valid based on a calibrated difference of forward voltage and the measured difference of forward voltage;
- and
- in response to determining that the first light emitting diode and the second light emitting diode are valid, determining, by the circuitry, an oxygen saturation level using the first light emitting diode and the second light emitting diode and outputting, by the circuitry, an indication of the oxygen saturation level.
A system for measuring oxygen saturation, the system comprising:
- a sensor device comprising a first light emitting diode and a second light emitting diode;
- and
- an oximetry device comprising:
- a memory configured to store a calibrated difference of forward voltage;
- and
- circuitry configured to:
- determine a measured difference of forward voltage based on a first forward voltage at the first light emitting diode and a second forward voltage at the second light emitting diode;
- determine that the first light emitting diode and the second light emitting diode are valid based on the calibrated difference of forward voltage and the measured difference of forward voltage;
- and
- in response to the determination that the first light emitting diode and the second light emitting diode are valid, determine an oxygen saturation level using the first light emitting diode and the second light emitting diode and output an indication of the oxygen saturation level.
Dependencies are inferred from the claim text.