Transcutaneous analyte sensor systems and methods

Patent metadata

Field	Value
Publication number	US-11058329-B2
Application number	US-201715798249-A
Country	US
Kind code	B2
Filing date	Oct 30, 2017
Priority date	Oct 31, 2016
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

Sensor systems can be used to measure an analyte concentration. Sensor systems can include a base having a distal side configured to face towards a person's skin. An adhesive can couple the base to the skin. A transcutaneous analyte measurement sensor can be coupled to the base and can be located at least partially in the host. A transmitter can be coupled to the base and can transmit analyte measurement data to a remote device.

First claim

What is claimed is:

1. A sensor system for measuring an analyte concentration, the sensor system comprising:
a base having a distal side configured to face towards a skin of a host;
a first adhesive coupled to the base and configured to couple the base to the skin;
a transmitter coupled to the base and configured to transmit analyte measurement data;
a transcutaneous analyte measurement sensor coupled to the base and configured to be bent against the first adhesive or the base after removal of the base from the skin; and
a sheet configured to bend at least a portion of the sensor towards the base after removal of the sensor from the host, wherein a distal tip of the sensor is located between the base and the sheet.

2. The system of claim 1 , further comprising an adhesive portion of the sheet configured to bend or collapse at least a portion of the sensor against the base.

3. The system of claim 1 , wherein the sheet covers the distal tip of the sensor and adheres to the first adhesive such that the sheet guards against the distal tip of the sensor penetrating tissue after the sensor is removed from the host.

4. The system of claim 3 , wherein the sheet is configured to be pliable.

5. The system of claim 4 , wherein the first adhesive couples the sheet to the base.

6. The system of claim 4 , wherein the sheet comprises a first state in which the sheet is folded, is located proximally relative to the distal tip, does not cover the distal tip, and forms a tab configured to enable a user to unfold the sheet.

7. The system of claim 6 , wherein the sheet comprises a second state in which the sheet is at least partially unfolded relative to the first state, is at least partially located distally relative to the distal tip, and the distal tip of the sensor is at least partially confined between the sheet and the first adhesive.

8. The system of claim 3 , wherein the sheet is a pliable sheet, the system further comprising a second sheet having a second puncture resistance that is greater than a first puncture resistance of the pliable sheet, wherein the second sheet is located between the distal tip and the pliable sheet to protect the pliable sheet from being punctured by the distal tip.

9. The system of claim 8 , wherein the first and second puncture resistances are measured using the distal tip of the sensor.

10. The system of claim 8 , wherein the second sheet is coupled to the pliable sheet such that the second sheet is configured to deform the distal tip as the pliable sheet is folded over the distal tip.

11. A sensor system for measuring an analyte concentration, the sensor system comprising:
a base having a distal side configured to face towards a skin of a host, the base having a first portion and a second portion, the second portion of the base being coupled to the first portion by a hinge;
a first adhesive coupled to the base and configured to couple the base to the skin;
a transmitter coupled to the base and configured to transmit analyte measurement data;
a transcutaneous analyte measurement sensor coupled to the base; and
wherein the sensor is configured to be bent against the first adhesive or the base after removal of the base from the skin,
wherein decreasing a pivot angle at the hinge between the first portion and the second portion of the base places a portion of the sensor between the first portion and the second portion of the base, and
wherein the hinge comprises a first pin rotatably coupled to a first channel configured to retain the first pin as the first portion of the base rotates relative to the second portion of the base.

12. The system of claim 11 , wherein the hinge comprises a second pin rotatably coupled to a second hole configured to retain the second pin as the first portion of the base rotates relative to the second portion of the base,
wherein the first pin protrudes in a first direction, the second pin protrudes in a second direction, and the first direction is opposite relative to the second direction.

13. The system of claim 11 , wherein the first adhesive comprises a first section and a second section, the first section is coupled to the first portion of the base such that the first section is configured to adhere the first portion of the base to the skin, and the second section is coupled to the second portion of the base such that the second section is configured to adhere the second portion of the base to the skin.

14. The system of claim 13 , wherein the hinge is configured to enable the first section of the first adhesive to face towards the second section of the first adhesive while the portion of the sensor is at least partially confined between the first and second portions of the base.

15. The system of claim 11 , wherein the system is configured to bend the portion of the sensor in response to rotating the hinge, wherein the portion of the sensor is bent between the first and second portions of the base to guard against a distal tip of the sensor penetrating tissue after the sensor system is removed from the skin.

16. The system of claim 11 , wherein the first portion of the base is rotationally spring-loaded relative to the second portion of the base such that the system is configured to decrease the pivot angle in response to a rotational spring bias.

17. The system of claim 11 , further comprising a torsion spring coupled to the hinge such that the torsion spring is configured to decrease the pivot angle to place the portion of the sensor between the first and second portions of the base.

18. A sensor system for measuring an analyte concentration, the sensor system comprising:
a base having a distal side configured to face towards a skin of a host;
a first adhesive coupled to the base and configured to couple the base to the skin;
a transmitter coupled to the base and configured to transmit analyte measurement data;
a transcutaneous analyte measurement sensor coupled to the base; and
wherein the sensor is configured to be bent against the first adhesive or the base after removal of the base from the skin, and
wherein a distal tip of the sensor is at least partially confined between a pliable sheet and the base such that the pliable sheet holds at least a portion of the sensor in a bent position and the pliable sheet is adhered to the first adhesive.

19. The system of claim 18 , wherein the pliable sheet comprises a first state and a second state,
wherein in the first state, the pliable sheet is located proximally relative to the first adhesive when the sensor system is coupled to the skin, and
wherein in the second state, the pliable sheet is located distally relative to the first adhesive when the distal tip of the sensor is at least partially confined between the pliable sheet and the base.

Assignees

• Dexcom Inc

Inventors

• Simpson Peter C
• Shi Minglian
• Bohm Sebastian
• Wells Maria Noel Brown
• Majewski John Patrick
• Edra Leah Morta
• Sheth Disha B
• Gray John Michael
• Wang Shanger
• Lee Ted Tang
• Moore Michael L
• Mitchell Jason
• Blackwell Jennifer
• Shah Neel Narayan
• Newhouse Todd Andrew
• Halac Jason
• Schoonmaker Ryan Everett
• Neale Paul V
• Zou Jiong
• Saint Sean T

Classifications

• A61B5/6833

  Adhesive patches · CPC title

• A61B5/14532 Primary

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

• A61B5/0004

  characterised by the type of physiological signal transmitted · CPC title

• A61B5/0015

  characterised by features of the telemetry system · CPC title

• A61B2560/045

  with a separable interface unit, e.g. for communication · CPC title