Analyte sensors and methods of use

#This invention relates to analytical sensors for the detection of analyte in a sample, and methods of making and using the sensors.

#Biosensors, also referred to as analytical sensors or merely sensors, are commonly used to determine the presence and concentration of a biological analyte in a sample. Such biosensors are used, for example, to monitor blood glucose levels in diabetic patients.

#As sensors continue to be used, there continues to be an interest in sensors that are easy to manufacture and easy for a patient to use.

#Referring now to the drawings, wherein like reference numerals and letters indicate corresponding structure throughout the several views:

#FIG. 1A is a schematic perspective view of a first embodiment of a sensor strip in accordance with the present invention;

#FIG. 1B is an exploded view of the sensor strip of FIG. 1A, the layers illustrated individually with the electrodes in a first configuration;

#This disclosure provides sensors and methods of making and using those sensors that facilitate the drawing of fluid sample (e.g., blood) into the sensor by inhibiting contact of the patient's skin with the sample inlet.

#Referring to the drawings in general and FIGS. 1A and 1B in particular, a first embodiment of a sensor 10 is schematically illustrated, herein shown in the shape of a strip. It is to be understood that the sensor may be any suitable shape. Sensor strip 10 has a first substrate 12, a second substrate 14, and a spacer 15 positioned therebetween. Sensor strip 10 is a layered construction.

#Sensor strip 10 includes at least one working electrode 22 and at least one counter electrode 24. Although not illustrated, sensor strip 10 may also include an optional fill indicator electrode and/or and optional insertion monitor.