Systems and method for activating analyte sensor electronics

Patent metadata

Field	Value
Publication number	US-11638540-B2
Application number	US-201916400873-A
Country	US
Kind code	B2
Filing date	May 1, 2019
Priority date	May 3, 2018
Publication date	May 2, 2023
Grant date	May 2, 2023

Abstract

Various analyte sensor systems for controlling activation of analyte sensor electronics circuitry are provided. Related methods for controlling analyte sensor electronics circuitry are also provided. Various analyte sensor systems for monitoring an analyte in a host are also provided. Various circuits for controlling activation of an analyte sensor system are also provided. Analyte sensor systems utilizing a state machine having a plurality of states for collecting a plurality of digital counts and waking a controller responsive to a wake up signal are also provided. Related methods for such analyte sensor systems are also provided. Systems for controlling activation of analyte sensor electronics circuitry utilizing a magnetic sensor are further provided. One or more display device configured to display one or more analyte concentration values are also provided.

First claim

What is claimed is:

1. A system for controlling activation of analyte sensor electronics circuitry, the system comprising:
an analyte sensor that is electrically and mechanically coupled to the analyte sensor electronics circuitry prior to transitioning the system into an operational state;
wherein the analyte sensor electronics circuitry is adapted to:
trigger an indication for the system to exit a lower power state and transition into the operational state, wherein the indication is a non-analyte signal that is triggered based on a first threshold value associated with an indication of insertion of the analyte sensor into a host;
responsive to the indication, generate a control signal operable to cause the analyte sensor to gather information related to a level of an analyte in the host; and
generate a comparison between the information related to the level of the analyte in the host and a condition, wherein the condition comprises the level of the analyte in the host exceeding a second threshold value;

wherein the system exits the lower power state and transitions into the operational state based on the indication being triggered and the comparison indicating that the level of the analyte in the host satisfies the condition.

2. The system of claim 1 , wherein the analyte sensor electronics circuitry is further adapted to cause the system to trigger the indication in response to the first threshold value being satisfied for at least a predetermined amount of time.

3. The system of claim 1 , wherein the non-analyte signal is generated using one or more of an activation detection circuit and an activation detection component that are adapted to detect one or more of the insertion of the analyte sensor into the host and deployment of the system.

4. The system of claim 1 , wherein the control signal is a signal operable to cause a potentiostat to apply a voltage bias to the analyte sensor and thereby cause the analyte sensor to gather the information related to the level of the analyte in the host.

5. The system of claim 1 , wherein, after the system transitions to the operational state, the system is configured to continue to gather the information related to the level of the analyte in the host and is configured to communicate the information to one or more display devices or one or more partner devices.

6. The system of claim 1 , wherein the second threshold value is related to a level of a known analyte typically present in a human host.

7. The system of claim 1 , wherein the indication is generated using one or more of:
a detected proximity between the analyte sensor electronics circuitry and a reference object;
a temperature monitored using the analyte sensor electronics circuitry;
an output of an accelerometer of the analyte sensor electronics circuitry;
a response generated using wireless signaling transmitted or received by the analyte sensor electronics circuitry;
a detected change in air pressure measured by the analyte sensor electronics circuitry;
audio information monitored by the analyte sensor electronics circuitry;
a signal generated by the analyte sensor electronics circuitry in response to photons detected by the analyte sensor electronics circuitry;
a conductivity measured between two terminals of the analyte sensor electronics circuitry;
a mechanical switch located on or within a housing of the analyte sensor electronics circuitry;
a component adapted to change a connection between two conductive elements of the analyte sensor electronics circuitry, in response to movement of the component; and
a measured strain.

8. The system of claim 1 , wherein the condition comprises the level of the analyte in the host exceeding the second threshold value for programmed intervals of time.

9. The system of claim 1 , wherein the analyte sensor electronics circuitry is adapted such that the information related to the level of the analyte in the host is used to generate detected counts, wherein the condition further comprises a threshold characteristic, and wherein if the comparison indicates that the detected counts meet the threshold characteristic, the system is configured to exit the lower power state and enters the operational state.

10. A method for controlling analyte sensor electronics circuitry, the method comprising:
the analyte sensor electronics circuitry obtaining a first electrical signal generated using one or more of an analyte sensor and a secondary sensor;
determining whether a first condition is met based on the first electrical signal obtained by the analyte sensor electronics circuitry, wherein the first electrical signal is a non-analyte signal that is generated in response to insertion of the analyte sensor into a host;
responsive to the first condition being met, the analyte sensor electronics circuitry activating an analyte measurement circuit;
the analyte measurement circuit using the analyte sensor to gather information related to an analyte value in the host, wherein the analyte sensor was coupled to the analyte sensor electronics circuitry before the analyte sensor was implanted into the host;
the analyte sensor electronics circuitry determining whether the information related to the analyte value in the host meets a second condition, wherein the second condition is met if the information related to the analyte value indicates that a level of the analyte value in the host exceeds a threshold value;
responsive to the analyte sensor electronics circuitry determining that the information related to the analyte value in the host meets the second condition, the analyte sensor electronics circuitry exiting a lower power consumption mode; and
responsive to the analyte sensor electronics circuitry determining that the information related to the analyte value in the host does not meet the second condition, the analyte sensor electronics circuitry remaining in the lower power consumption mode and obtaining a second electrical signal that indicates whether the first condition has been met.

11. The method of claim 10 , wherein the threshold value is related to a level of a known analyte typically present in a human host.

12. The method of claim 10 , wherein the first condition represents a proximity of the analyte sensor electronics circuitry to a reference point.

13. The method of claim 10 , wherein the first condition represents a level of acceleration detected using an accelerometer.

14. The method of claim 10 , wherein the first condition relates to one or more electrical characteristics measured for the analyte sensor.

15. A system for monitoring an analyte in a host, the system comprising:
an analyte sensor comprising one or more electrodes that are adapted to gather information related to a level of the analyte in the host; and
sensor electronics circuitry mechanically and electrically coupled to the analyte sensor before the analyte sensor is implanted into the host, wherein:
the sensor electronics circuitry is adapted to generate an indicator using a first condition and a measurement of an electrical signal passed between at least two of the one or more electrodes;
the first condition comprises a threshold value indicative of implantation of the analyte sensor into the host;
the sensor electronics circuitry is further adapted to cause the system to enter an active state in response to the sensor electronics circuitry generating a confirmation of the indicator using a second condition and the information related to the level of the analyte in the host; and
the second condition comprises the level of the analyte in the host exceeding a threshold value.

Assignees

• Dexcom Inc

Inventors

• Halac Jason
• Bohm Sebastian
• Crabtree Vincent Peter
• Derenzy David
• Dervaes Mark S
• Kalfas Nicholas
• Mcdaniel Zebediah L
• Moore Michael Levozier
• Newhouse Todd Andrew
• Ploof Michael A
• Reichert Stephen Alan
• Simpson Peter C
• Teeter Alexander Leroy
• Garcia Rodolfo
• Piotrowiak Jaroslaw
• O'Connell Thomas George
• Doria Arlene G

Classifications

• A61B2562/0223

  Magnetic field sensors · CPC title

• A61B2560/0257

  using atmospheric pressure · CPC title

• A61B5/14546

  for measuring analytes not otherwise provided for, e.g. ions, cytochromes · CPC title

• A61B5/14532 Primary

  for measuring glucose, e.g. by tissue impedance measurement · CPC title

• A61B5/14503

  invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors (A61B5/1459, A61B5/1464, A61B5/1473, A61B5/1482, A61B5/14865 take precedence) · CPC title