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1. WO2019055237 - METHODS, SYSTEMS, AND DEVICES FOR CALIBRATION AND OPTIMIZATION OF GLUCOSE SENSORS AND SENSOR OUTPUT

Publication Number WO/2019/055237
Publication Date 21.03.2019
International Application No. PCT/US2018/049190
International Filing Date 31.08.2018
IPC
A61B 5/145 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
145Measuring characteristics of blood in vivo, e.g. gas concentration, pH-value
A61B 5/1486 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
145Measuring characteristics of blood in vivo, e.g. gas concentration, pH-value
1486using enzyme electrodes, e.g. with immobilised oxidase
A61B 5/1468 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
145Measuring characteristics of blood in vivo, e.g. gas concentration, pH-value
1468using chemical or electrochemical methods, e.g. by polarographic means
A61B 5/00 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
CPC
A61B 2505/07
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2505Evaluating, monitoring or diagnosing in the context of a particular type of medical care
07Home care
A61B 2560/0223
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2560Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
02Operational features
0223of calibration, e.g. protocols for calibrating sensors
A61B 2560/0252
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2560Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
02Operational features
0242adapted to measure environmental factors, e.g. temperature, pollution
0247for compensation or correction of the measured physiological value
0252using ambient temperature
A61B 2560/0257
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2560Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
02Operational features
0242adapted to measure environmental factors, e.g. temperature, pollution
0247for compensation or correction of the measured physiological value
0257using atmospheric pressure
A61B 2562/028
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2562Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
02Details of sensors specially adapted for in-vivo measurements
028Microscale sensors, e.g. electromechanical sensors [MEMS]
A61B 2562/029
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2562Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
02Details of sensors specially adapted for in-vivo measurements
029Humidity sensors
Applicants
  • MEDTRONIC MINIMED, INC. [US]/[US]
Inventors
  • AJEMBA, Peter
  • NOGUEIRA, Keith
  • NISHIDA, Jeffrey
  • TSAI, Andy Y.
  • KANNARD, Brian T.
  • MILLER, Michael E.
  • JACKS, Steven C.
  • VARSAVSKY, Andrea
Agents
  • DAVOUDIAN, Keyvan
Priority Data
16/117,46630.08.2018US
16/117,61730.08.2018US
16/117,73330.08.2018US
62/558,24813.09.2017US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHODS, SYSTEMS, AND DEVICES FOR CALIBRATION AND OPTIMIZATION OF GLUCOSE SENSORS AND SENSOR OUTPUT
(FR) PROCÉDÉS, SYSTÈMES ET DISPOSITIFS D'ÉTALONNAGE ET D'OPTIMISATION DE CAPTEURS DE GLUCOSE ET DE SORTIE DE CAPTEURS
Abstract
(EN)
A continuous glucose monitoring system may utilize externally sourced information regarding the physiological state and ambient environment of its user for externally calibrating sensor glucose measurements. Externally sourced factory calibration information may be utilized, where the information is generated by comparing metrics obtained from the data used to generate the sensor's glucose sensing algorithm to similar data obtained from each batch of sensors to be used with the algorithm in the future. The output sensor glucose value of a glucose sensor may also be estimated by analytically optimizing input sensor signals to accurately correct for changes in sensitivity, run-in time, glucose current dips, and other variable sensor wear effects. Correction actors, fusion algorithms, EIS, and advanced ASICs may be used to implement the foregoing, thereby achieving the goal of improved accuracy and reliability without the need for blood-glucose calibration, and providing a calibration-free, or near calibration-free, sensor.
(FR)
Un système de surveillance de glucose en continu peut utiliser des informations de source externe concernant l'état physiologique et l'environnement ambiant de son utilisateur pour étalonner de manière externe des mesures de glucose par capteurs. Des informations d'étalonnage d'usine de source externe peuvent être utilisées, les informations étant générées par la comparaison des valeurs métriques obtenues à partir des données utilisées pour générer l'algorithme de détection de glucose des capteurs à des données similaires obtenues à partir de chaque lot de capteurs à utiliser avec l'algorithme dans le futur. La valeur de glucose du capteur de sortie d'un capteur de glucose peut également être estimée par l'optimisation de manière analytique des signaux de capteurs d'entrée pour corriger avec précision des variations de sensibilité, de temps d'exécution, de chutes de courant de glucose, et d'autres effets variables d'usure des capteurs. Des acteurs de correction, des algorithmes de fusion, des EIS et des ASIC avancés peuvent être utilisés pour implémenter ce qui précède, ce qui permet d'atteindre le but d'une précision et d'une fiabilité améliorées sans nécessiter d'étalonnage de la glycémie, et de fournir un capteur ne nécessitant pas d'étalonnage, ou presque pas d'étalonnage.
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