Long-Term Glucose Sensor Calibration via Short-Term Data
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Solution Overview
Problem
Conventional long-term glucose sensors require a lengthy calibration process that often relies on uncomfortable finger prick methods, leading to delayed detection of hyper- or hypoglycemic conditions in diabetic patients.
Innovation Solution
The method involves calibrating a long-term glucose sensor using data from one or more short-term glucose sensors, either by matching data points or using the short-term sensor's data to update the calibration of the long-term sensor, thereby reducing dependence on finger prick methods and shortening the calibration time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a long-term sensor is implanted to provide continuous blood glucose measurements, then the convenience and continuity of monitoring is improved, but the sensor requires a lengthy calibration period using finger prick methods
Solution Approach 1:
A mediator device is introduced that receives data from both the implanted long-term sensor and the external short-term sensor, processes this data to establish calibration relationships, and enables the long-term sensor to be calibrated without direct finger prick measurements by the patient
Solution Approach 2:
The calibration information is obtained by copying data from the short-term sensor that has already been calibrated through finger prick methods, rather than requiring the long-term sensor to undergo separate calibration procedures
2Measurement precision
If finger prick methods are used for calibration, then the sensor data can be calibrated accurately, but the process is uncomfortable and leads to delayed detection of glycemic conditions
Solution Approach 1:
The system performs self-calibration by using the short-term sensor data that has been calibrated through finger prick methods to automatically calibrate the long-term sensor, eliminating the need for the patient to perform repeated finger pricks for calibration purposes
3Measurement precision
If finger prick methods are used for calibration, then calibration can be performed, but frequent calibrations are required which increases the burden on the patient
Solution Approach 1:
The system establishes continuous calibration by using the ongoing data from the short-term sensor to maintain calibration of the long-term sensor over time, rather than requiring discrete, repeated calibration events through finger prick methods
Data Source
AI summary
Systems and methods for processing sensor analyte data are disclosed, including initiating calibration, updating calibration, evaluating clinical acceptability of reference and sensor analyte data, and evaluating the quality of sensor calibration. The sensor can be calibrated using a calibration set of one or more matched sensor and reference analyte data pairs. Reference data resulting from benchtop testing an analyte sensor prior to its insertion can be used to provide initial calibration of the sensor data. Reference data from a short term continuous analyte sensor implanted in a user can be used to initially calibrate or update sensor data from a long term continuous analyte sensor.