发明名称 |
Symmetrically arranged sensor electrodes in an ophthalmic electrochemical sensor |
摘要 |
An eye-mountable device includes an electrochemical sensor embedded in a polymeric material configured for mounting to a surface of an eye. The electrochemical sensor includes a working electrode, a reference electrode, and a reagent that selectively reacts with an analyte to generate a sensor measurement related to a concentration of the analyte in a fluid to which the eye-mountable device is exposed. The working electrode can have a first side edge and a second side edge. The reference electrode can be situated such that at least a portion of the first and second side edges of the working electrode are adjacent respective sections of the reference electrode. |
申请公布号 |
US9084561(B2) |
申请公布日期 |
2015.07.21 |
申请号 |
US201313919764 |
申请日期 |
2013.06.17 |
申请人 |
Google Inc. |
发明人 |
Etzkorn James;Liu Zenghe |
分类号 |
A61B5/00;A61B3/10;A61B5/1477;A61B5/1486;G01N27/327;A61B5/145 |
主分类号 |
A61B5/00 |
代理机构 |
Blakely Sokoloff Taylor & Zafman LLP |
代理人 |
Blakely Sokoloff Taylor & Zafman LLP |
主权项 |
1. An eye-mountable device comprising:
a polymeric material having a concave surface and a convex surface, wherein the concave surface is configured to be removably mounted over a corneal surface and the convex surface is configured to be compatible with eyelid motion when the concave surface is so mounted; a substrate at least partially embedded within the polymeric material; an antenna disposed on the substrate; an electrochemical sensor disposed on the substrate and including (i) a working electrode having a first side edge and a second side edge, and (ii) a reference electrode situated such that at least a portion of the first and second side edges of the working electrode are adjacent respective sections of the reference electrode; and a controller electrically connected to the electrochemical sensor and the antenna, wherein the controller is configured to: (i) apply a voltage between the working electrode and the reference electrode sufficient to generate an amperometric current related to the concentration of an analyte in a fluid to which the eye-mountable device is exposed; (ii) measure the amperometric current; and (iii) use the antenna to indicate the measured amperometric current, wherein the substrate is a ring-like structure having inner and outer edges, wherein the working electrode and the reference electrode each include a plurality of interdigitated extensions oriented on the substrate to be locally parallel to the inner and outer edges of the ring-like structure at one or more locations along the interdigitated extensions. |
地址 |
Mountain View CA US |