US 12,029,554 B2
Analyte sensors with a sensing surface having small sensing spots
Udo Hoss, Castro Valley, CA (US); Phu Le, Dublin, CA (US); Yi Wang, San Ramon, CA (US); Frank David Fujimoto, Fremont, CA (US); Suyue Qian, Fremont, CA (US); and Lam Tran, Vallejo, CA (US)
Assigned to Abbott Diabetes Care Inc., Alameda, CA (US)
Filed by Abbott Diabetes Care Inc., Alameda, CA (US)
Filed on Aug. 26, 2022, as Appl. No. 17/822,505.
Application 17/822,505 is a continuation of application No. 16/358,918, filed on Mar. 20, 2019, granted, now 11,457,840.
Application 16/358,918 is a continuation of application No. 13/315,034, filed on Dec. 8, 2011, granted, now 10,327,677, issued on Jun. 25, 2019.
Claims priority of provisional application 61/421,371, filed on Dec. 9, 2010.
Prior Publication US 2023/0165489 A1, Jun. 1, 2023
Int. Cl. A61B 5/145 (2006.01); A61B 5/1473 (2006.01); C12Q 1/00 (2006.01)
CPC A61B 5/14532 (2013.01) [A61B 5/1473 (2013.01); C12Q 1/001 (2013.01); C12Q 1/006 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An in vivo analyte sensor for measuring analyte levels in a bodily fluid of a user comprising:
a first portion coupled with a sensor control unit, wherein the first portion is positionable above a surface of a skin,
a second portion positionable below the surface of the skin, wherein the second portion is in contact with bodily fluid and configured to measure signals indicative of analyte levels in the bodily fluid, wherein the second portion comprises electrodes connected to contact portions positioned on the first portion;
wherein the sensor control unit comprises
a processor configured to determine data indicative of analyte levels and to transmit the data indicative of analyte levels to a receiver unit according to a Bluetooth communication protocol via a transmitter coupled to the processor, and
a power supply for operating the sensor control unit;
further wherein the electrodes of the second portion include a first working electrode comprising a first sensing surface having a first array of two or more sensing elements each deposited separately thereon, and
a second array of two or more sensing elements each deposited separately on the first array of sensing elements,
wherein each sensing element comprises an analyte-responsive enzyme; and
a counter electrode; and
a second working electrode comprising a second sensing surface disposed thereon, the second sensing surface including two or more discrete sensing elements each deposited separately thereon;
wherein the sensor control unit is configured to process factory-determined calibrated measurements that are input or stored in the sensor control unit, such that the sensing elements are thereby factory calibrated, requiring no user calibration or recalibration.