METHODS FOR MEASURING PHYSIOLOGICAL FLUIDS

• US 20110174616A1
• Filed: 03/30/2011
• Published: 07/21/2011
• Est. Priority Date: 10/17/2005
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Lifescan Incorporated (Duv Holding Corporation)
• Inventors: ROBERTS, Neil, Smeaton, Gary
• Granted Patent: US 8,486,245 B2
• Time in Patent Office: Days
• US Class Current: 204/406
• CPC Class Codes: G01N 27/3274 Corrective measures, e.g. error detection, compensation for temperature or hematocrit, calibration coding of calibration information G01N33/48771

Abstract

Electrochemical measurement techniques for measuring the concentration of an analyte in a physiological fluid sample are described. More particularly, the present invention relates to techniques for distinguishing a signal caused by an extraneous event from a desired information providing signal such as one indicative of a measurement error.

Claims

1-17. -17. (canceled)

18. A testing meter for electrochemically measuring the concentration of an analyte in a physiological fluid sample, the testing meter comprising:

a processor;

an electrochemical measurement device that can be electrically connected to a test device comprising a fluid application portion having at least a pair of electrodes and a reagent so that the electrochemical measurement device can provide a potential and measure current flow across the at least a pair of electrodes when a test device is electrically connected to the electrochemical measurement device; and

memory comprising programming that can cause the electrochemical meter, when a test device is electrically connected thereto, to measure a current at the least a pair of electrodes and use the magnitude of the current at the end of a first predetermined time period as a test reading indicative of the concentration of an analyte in a physiological fluid present in the test fluid application area of the test device if the magnitude of the current remains above a threshold current value for a second predetermined time period wherein the second time period comprises an initial portion of the first time period.

19. The testing system of claim 18, wherein the duration of the second time period is greater than the time needed for a current spike from a predetermined extraneous event to decay below the threshold value and less than the first time period.