JPWO2021138195A5

JPWO2021138195A5 -

Info

Publication number: JPWO2021138195A5
Application number: JP2022540464A
Authority: JP
Publication date: 2023-12-22

Claims

An exhalation sensor device,
a sampling unit having a housing configured to receive a sample of exhaled breath from a user;
a sensor disposed within the housing and in fluid communication with the sample exhaled breath when received within the housing;
a processor in electrical communication with the sensor;
the processor is configured to determine a dissipation time when the sensor is exposed from a substantially constant concentration level of CO detected from the sample exhaled breath to a detected ambient level of CO;
the processor is further configured to calculate a time constant based on the dissipation time and the decrease from the substantially constant concentration level to the ambient level;
The exhalation sensor device, wherein the processor is further configured to apply the time constant to a transient response of the sensor to account for drift in calibrating the sensor.

2. The apparatus of claim 1, wherein the processor is further configured to apply an aging factor to the sensor to account for sensor degradation over time before calculating the time constant.

2. The apparatus of claim 1, wherein the processor is configured to calibrate the sensor to account for drift in the transient and steady state responses.

The processor is further configured to instruct the user to hold his breath for a predetermined period of time before exhaling the sample exhalation , and optionally, the processor causes the sample exhalation to dissipate from the sensor. 2. The method of claim 1, further configured to instruct the user to :

A method of calibrating a sensor, the method comprising:
receiving the sample breath from a user until the sensor detects a substantially constant concentration level of CO from the sample breath ;
determining the length of time for the substantially constant concentration level of CO to dissipate to an ambient level of CO;
calculating a time constant based on the length of time and the decrease from the substantially constant concentration level to the ambient level;
calibrating the sensor to account for drift by applying the time constant to a transient response of the sensor.

6. The method of claim 5 , further comprising applying an aging factor to the sensor before calculating the time constant to account for sensor degradation over time.

The system or claim of claim 2, wherein the aging factor depends on temperature and humidity exposure of the sensor over a period of time, and optionally, the aging factor ranges from 2% to 5% per year. The method described in Section 6 .

6. The method of claim 5 , further comprising calibrating the sensor to account for steady state response drift.

6. The method of claim 5 , wherein receiving the sample breath includes receiving the sample breath into a sampling unit in which the sensor is located.

Receiving the sample breath further includes instructing the user to hold his breath for a predetermined period of time before exhaling the sample breath , and optionally allowing the sample breath to dissipate from the sensor. 6. The method of claim 5 , further comprising instructing the user to .

An exhalation sensor device,
a sampling unit having a housing configured to receive a sample of exhaled breath from a user;
a sensor disposed within the housing and in fluid communication with the sample exhaled breath when received within the housing;
a processor in electrical communication with the sensor, the processor configured to receive from the sensor a measurement corresponding to a biological parameter sensed in the sample exhaled breath; ,
the processor is configured to apply an aging factor to the measurements based on a length of time that has elapsed since initial calibration of the sensor to account for a rate of degradation of the sensor over the length of time;
The exhalation sensor device, wherein the processor is further configured to modify the aging factor based on one or more environmental factors to which the sensor is exposed for the length of time.

12. The apparatus of claim 11 , wherein the processor is configured to apply the aging factor of 3% to the measurements for each length of time of one year.

12. The apparatus of claim 11 , wherein the processor is configured to modify the aging factor based on a temperature and humidity level to which the sensor is exposed for the length of time.

14. The apparatus of claim 13 , wherein a relatively low storage temperature corresponds to a relatively low rate of deterioration and/or a relatively high storage temperature corresponds to a relatively high rate of deterioration .

14. The apparatus of claim 13 , wherein a relatively low relative humidity corresponds to a relatively high rate of deterioration and/or a relatively high relative humidity corresponds to a relatively low rate of deterioration .