TRANSIENT SIGNAL ERROR TRAP FOR AN ANALYTE MEASUREMENT DETERMINED FROM A SPECIFIED SAMPLING TIME DERIVED FROM A SENSED PHYSICAL CHARACTERISTIC OF THE SAMPLE CONTAINING THE ANALYTE

摘要

Various embodiments for methods, systems, and meters that allow for a more accurate analyte concentration with a biosensor by determining at least one physical characteristic of the sample and determining whether at least one output transient signal of the biosensor is erroneous by monitoring the biosensor and flagging an error if the signal outputs of the biosensor do not meet certain criteria.

主权项

1. An analyte measurement system comprising:
a test strip including:
a substrate;a plurality of electrodes connected to respective electrode connectors; and an analyte meter including:
a housing;a test strip port connector configured to connect to the respective electrode connectors of the test strip; anda microprocessor in electrical communication with the test strip port connector to apply electrical signals or sense electrical signals from the plurality of electrodes, wherein the microprocessor is configured to:
(a) apply a first signal to the plurality of electrodes so that a physical characteristic of a fluid sample is determined;(b) estimate an analyte concentration based on a predetermined sampling time point during a test sequence;(c) apply a second signal to a first electrode and a second electrode of the plurality of electrodes at a specified sampling time point or interval during the test sequence dictated by the determined physical characteristic;(d) measure a signal output at a plurality of time points including the specified sampling time for each of the first and second electrodes;(e) measure a signal output at a predetermined offset time interval (Δt) from the specified sampling time for each of the first and second electrodes;(f) evaluate, for each of the first and second electrodes, whether a slope of the signal outputs between the predetermined offset time interval (Δt) and the specified sampling time is approximately zero or increasing over time;(g) if the slope of the signal output for each electrode at the predetermined offset time (Δt) to the specified sampling time is decreasing then determine or calculate the analyte concentration from the signal outputs of the first and second electrodes at the specified sampling time and annunciate the analyte concentration; and(h) if the slope of the signal output for each electrode at the predetermined offset (Δt) time to the specified sampling time is approximately zero or increasing over time then annunciate an error.