Preconnected analyte sensors

Patent metadata

Field	Value
Publication number	US-12144615-B2
Application number	US-202217899520-A
Country	US
Kind code	B2
Filing date	Aug 30, 2022
Priority date	Apr 22, 2019
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

Various analyte sensing apparatuses and associated housings are provided. Some apparatuses comprise one or more caps. Some apparatuses comprise a two-part adhesive patch. Some apparatuses comprise one or more sensor bends configured to locate and/or hold a sensor in place during mounting. Some apparatuses utilize one or more dams and/or wells to retain epoxy for securing a sensor. Some apparatuses utilize a pocket and one or more adjacent areas and various transitions for preventing epoxy from wicking to undesired areas of the apparatus. Some apparatuses include heat-sealable thermoplastic elastomers for welding a cap to the apparatus. Related methods of fabricating such apparatuses and/or housings are also provided.

First claim

What is claimed is:

1. An analyte sensing apparatus comprising:
a housing comprising:
a first pocket having an opening opposite a first pocket base, the opening disposed at a height above the first pocket base and defining a volume therebetween,
a first adjacent area abutting a first side of the first pocket, the first adjacent area having a first adjacent area base and a first transition between the first pocket base and the first adjacent area base, the first adjacent area base being disposed at a reduced height that is farther from the opening as compared to the first pocket base, and
a conductive contact disposed in the first adjacent area;

an electronics assembly substrate disposed within the housing and electrically coupled to the conductive contact;
an analyte sensor comprising at least one electrode in electrical communication with the conductive contact; and
an adhesive disposed on the first pocket base, the adhesive securing at least a portion of the analyte sensor to the first pocket base,
wherein the first adjacent area is continuous with the first pocket, and wherein the first transition inhibits the adhesive from creeping from the first pocket base into the first adjacent area base.

2. The apparatus of claim 1 , further comprising:
a second adjacent area abutting a second side of the first pocket, the second adjacent area having a second adjacent area base and a second transition between the first pocket base and the second adjacent area base.

3. The apparatus of claim 2 , wherein the second adjacent area base is disposed at an elevated height that is closer to the opening as compared to the first pocket base, and
wherein the adhesive forms an upward-inflecting meniscus at the second transition and the elevated height exceeds a height of the upward-inflecting meniscus.

4. The apparatus of claim 2 , wherein the second adjacent area base is disposed at a same height as the first pocket base.

5. The apparatus of claim 2 , wherein the second adjacent area base is disposed at a reduced height that is farther from the opening as compared to the first pocket base.

6. The apparatus of claim 2 , wherein the adhesive forms a downward-inflecting meniscus at the first transition and/or the second transition.

7. The apparatus of claim 2 , wherein the adhesive is an epoxy adhesive or a UV-curable adhesive.

8. The apparatus of claim 1 , wherein a second adjacent area abuts a second side of the first pocket, the second adjacent area being continuous with the first pocket and the second adjacent area having a through-hole for a sensor insertion needle to pass through.

9. The apparatus of claim 1 , wherein:
the first pocket has first sidewalls extending from the first pocket base to the opening, the first sidewalls being separated from each other at a first width,
the first adjacent area has second sidewalls extending from the first adjacent area base, the second sidewalls being separated from each other at a second width, and
the first transition has third sidewalls extending towards each other and separated from each other at a third width that is less than the first width and that is less than the second width.

10. An analyte sensing apparatus housing comprising:
a first pocket having an opening opposite a first pocket base, the opening disposed at a height above the first pocket base and defining a volume therebetween;
a first adjacent area abutting a first side of the first pocket, the first adjacent area having a first adjacent area base and a first transition between the first pocket base and the first adjacent area base, the first adjacent area base being disposed at a reduced height that is farther from the opening as compared to the first pocket base; and
an adhesive disposed on the first pocket base,
wherein the first adjacent area is continuous with the first pocket, and wherein the first transition inhibits the adhesive from creeping from the first pocket base into the first adjacent area base.

11. The housing of claim 10 , further comprising:
a second adjacent area abutting a second side of the first pocket, the second adjacent area having a second adjacent area base and a second transition between the first pocket base and the second adjacent area base, and
an electronics assembly substrate disposed within the housing.

12. The housing of claim 11 , wherein the second adjacent area base is disposed at an elevated height that is closer to the opening as compared to the first pocket base.

13. The housing of claim 12 ,
wherein the adhesive forms an upward-inflecting meniscus at the second transition and the elevated height exceeds a height of the upward-inflecting meniscus.

14. The housing of claim 13 , wherein the elevated height is selected as a function of a predetermined amount, a viscosity, a surface energy, and/or a surface tension characteristic of the adhesive.

15. The housing of claim 13 , wherein the adhesive adheres to the second transition and the second transition inhibits the adhesive from creeping past the second transition.

16. The housing of claim 13 , wherein the adhesive is an epoxy adhesive or a UV-curable adhesive.

17. The housing of claim 11 , wherein the second transition is flush with the first pocket base.

18. The housing of claim 11 , wherein the second adjacent area base is disposed at a lower height that is farther from the opening as compared to the first pocket base.

19. The housing of claim 11 , wherein the first pocket base has a first surface energy and the first adjacent area base has a second surface energy different from the first surface energy.

20. The housing of claim 10 , wherein the first pocket has a substantially rounded rectangular-shaped geometry such that portions of sidewalls of the first pocket are substantially planar while other portions of the sidewalls that connect the substantially planar portions are curved.

Assignees

• Dexcom Inc

Inventors

• Fall Scott Alexander
• Castagna Patrick John
• Keller David A

Classifications

• A61B2562/0295

  Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157 · 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

• A61B5/0004 Primary

  characterised by the type of physiological signal transmitted · CPC title

• A61B5/1486

  using enzyme electrodes, e.g. with immobilised oxidase · CPC title

• A61B5/1468

  using chemical or electrochemical methods, e.g. by polarographic means · CPC title