Apparatus and process for improved measurements of a monitoring device
First Claim
1. An electrochemical system, comprising:
- an electrochemical sensor having an electrode;
a test meter configured to receive the electrochemical sensor; and
a high impedance circuit within the test meter, the high impedance circuit including a common electrical connector configured to form an electrical connection with the electrode of the electrochemical sensor when the sensor is disposed in the test meter, the circuit further being configured to detect a first voltage of the common electrical connector indicating that no electrochemical sensor is disposed in the test meter, a second voltage of the common electrical connector, distinct from the first voltage, indicating that the electrochemical sensor that is devoid of a bodily fluid sample is disposed in the test meter, and a third voltage of the common electrical connector, distinct from the first and second voltages, indicating that the electrochemical sensor is disposed in the test meter and a bodily fluid sample has been applied to the electrochemical sensor and wherein the test meter further comprises a sensor port connector including first and second electrical connectors, the circuit being configured such that the presence of an electrochemical sensor in the test meter results in a low impedance connection between the first and second electrical connectors.
9 Assignments
0 Petitions
Accused Products
Abstract
Methods and devices for improving measurements of test meter, and in particular for detecting a presence of an electrochemical sensor or strip in the test meter and a start time of an electrochemical reaction, are provided. In one exemplary embodiment of an electrochemical system includes an electrochemical sensor , a test meter, and a circuit. The circuit is configured to form an electrical connection with the electrochemical sensor such that the circuit can detect three distinct voltage ranges. The voltage ranges can be indicative of an absence of the electrochemical sensor, a presence of the sensor that is devoid of a sample, and a presence of the sensor with a sample. Test meters, methods for detecting when a sample starts to fill an electrochemical sensor for establishing when a reaction starts, and circuits for use with electrochemical strips, are also provided.
-
Citations
13 Claims
-
1. An electrochemical system, comprising:
-
an electrochemical sensor having an electrode; a test meter configured to receive the electrochemical sensor; and a high impedance circuit within the test meter, the high impedance circuit including a common electrical connector configured to form an electrical connection with the electrode of the electrochemical sensor when the sensor is disposed in the test meter, the circuit further being configured to detect a first voltage of the common electrical connector indicating that no electrochemical sensor is disposed in the test meter, a second voltage of the common electrical connector, distinct from the first voltage, indicating that the electrochemical sensor that is devoid of a bodily fluid sample is disposed in the test meter, and a third voltage of the common electrical connector, distinct from the first and second voltages, indicating that the electrochemical sensor is disposed in the test meter and a bodily fluid sample has been applied to the electrochemical sensor and wherein the test meter further comprises a sensor port connector including first and second electrical connectors, the circuit being configured such that the presence of an electrochemical sensor in the test meter results in a low impedance connection between the first and second electrical connectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for detecting when a sample starts to fill an electrochemical sensor having an electrode, the method comprising:
-
providing a test meter having a high impedance circuit, said high impedance circuit comprising; a detection component; a sense resistor in electrical communication with the detection component; a voltage reference point configured to be in electrical connection with an electrode of an electrochemical test strip in contact with the at least one electrical connector; and a wetting supply configured for supplying a voltage; measuring, with the test meter, a first voltage of the electrode indicative of absence of the electrochemical sensor; introducing the electrochemical sensor to the test meter; measuring, with the test meter, a dry strip voltage of the electrode, the dry strip voltage being distinct from the first voltage, and being indicative of the presence of the electrochemical sensor that is devoid of a sample; introducing a sample into the electrochemical sensor; measuring, with the test meter, a wet strip voltage of the electrode, the wet strip voltage being distinct from the dry strip voltage and from the first voltage, and being indicative of the presence of an amount in the sample in the electrochemical sensor disposed in the meter; and determining when the sample starts to fill the electrochemical sensor based on the measurement of the wet strip voltage. - View Dependent Claims (11, 12, 13)
-
Specification