Systems and Methods for Compensating Long Term Sensitivity Drift of Electrochemical Gas Sensors Exposed to Nitric Oxide
First Claim
1. A method for delivering notifications of a calibration status for a sensor associated with a therapeutic gas delivery device, the method comprising:
- storing in memory a baseline calibration value, slope, and calibration schedule;
monitoring a patient intake of therapeutic gas with the sensor;
delivering, via the therapeutic gas delivery device, a predetermined dosage of therapeutic gas to the patient;
measuring a concentration of therapeutic gas from the delivered predetermined dosage;
retrieving, from memory, the baseline calibration value, slope and calibration schedule;
performing a calibration according to the calibration schedule, wherein the calibration includes exposing the sensor to a zero concentration of the therapeutic gas and adjusting the baseline calibration value according to a sensor output value during the calibration;
determining, after a predetermined number of calibration attempts, that calibration has failed; and
notifying a user that calibration has failed.
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Accused Products
Abstract
Described are systems and methods for compensating long term sensitivity drift of catalytic type electrochemical gas sensors used in systems for delivering therapeutic nitric oxide (NO) gas to a patient by compensating for drift that may be specific to the sensors atypical use in systems for delivering therapeutic nitric oxide gas to a patient. In at least some instances, the long term sensitivity drift of catalytic type electrochemical gas sensors can be addressed using calibration schedules, which can factor in the absolute change in set dose of NO being delivered to the patient that can drive one or more baseline calibrations. The calibration schedules can be used reduce the amount of times the sensor goes offline. Systems and methods described may factor in in actions occurring at the delivery system and/or aspects of the surrounding environment, prior to performing a baseline calibration, and may postpone the calibration and/or rejected using the sensor'"'"'s output for the calibration.
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Citations
20 Claims
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1. A method for delivering notifications of a calibration status for a sensor associated with a therapeutic gas delivery device, the method comprising:
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storing in memory a baseline calibration value, slope, and calibration schedule; monitoring a patient intake of therapeutic gas with the sensor; delivering, via the therapeutic gas delivery device, a predetermined dosage of therapeutic gas to the patient; measuring a concentration of therapeutic gas from the delivered predetermined dosage; retrieving, from memory, the baseline calibration value, slope and calibration schedule; performing a calibration according to the calibration schedule, wherein the calibration includes exposing the sensor to a zero concentration of the therapeutic gas and adjusting the baseline calibration value according to a sensor output value during the calibration; determining, after a predetermined number of calibration attempts, that calibration has failed; and notifying a user that calibration has failed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for delivering notifications of a calibration status for a sensor associated with a nitric oxide delivery device, the method comprising:
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storing in memory a baseline calibration value, slope, and calibration schedule; monitoring a patient intake of nitric oxide with the sensor; delivering, via the nitric oxide delivery device, a predetermined dosage of nitric oxide to the patient; measuring a concentration of nitric oxide from the delivered predetermined dosage; retrieving, from memory, the baseline calibration value, slope and calibration schedule; performing a calibration according to the calibration schedule, wherein the calibration includes exposing the sensor to a zero concentration of the nitric oxide and adjusting the baseline calibration value according to a sensor output value during the calibration; determining, after a calibration attempt, that calibration has failed; notifying a user that calibration has failed; and re-attempting the calibration after a predetermined period of time. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for delivering notifications of a calibration status for a sensor associated with a nitric oxide delivery device, the method comprising:
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storing in memory a baseline calibration value, slope, and calibration schedule; monitoring a patient intake of nitric oxide with the sensor; delivering, via the nitric oxide delivery device, a predetermined dosage of nitric oxide to the patient; measuring a concentration of nitric oxide from the delivered predetermined dosage; retrieving, from memory, the baseline calibration value, slope and calibration schedule; performing a calibration according to the calibration schedule, wherein the calibration includes exposing the sensor to a zero concentration of the nitric oxide and adjusting the baseline calibration value according to a sensor output value during the calibration; determining, after a calibration attempt, that calibration has failed; determining that a sensor output values is outside an allowable threshold value range; re-attempting the calibration after a predetermined period of time; transmitting a notification to a user that calibration has failed. - View Dependent Claims (18, 19, 20)
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Specification