Patents Assigned to LifeScan, Inc.
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Patent number: 8603768Abstract: Methods of determining a corrected analyte concentration in view of some error source are provided herein. The methods can be utilized for the determination of various analytes and/or various sources of error. In one example, the method can be configured to determine a corrected glucose concentration in view of an extreme level of hematocrit found within the sample. In other embodiments, methods are provided for identifying various system errors and/or defects. For example, such errors can include partial-fill or double-fill situations, high track resistance, and/or sample leakage. Systems are also provided for determining a corrected analyte concentration and/or detecting some system error.Type: GrantFiled: January 6, 2009Date of Patent: December 10, 2013Assignee: LifeScan, Inc.Inventors: Ronald C. Chatelier, Alastair M. Hodges, Santhanagopalan Nandagopalan
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Patent number: 8603323Abstract: 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.Type: GrantFiled: September 20, 2010Date of Patent: December 10, 2013Assignee: LifeScan, Inc.Inventors: Harry A. Kranendonk, Lawrence K. Murray
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Patent number: 8597480Abstract: Devices and methods are provided for determining the concentration of a reduced form of a redox species. For example, a device can include a working electrode and a counter electrode spaced by a predetermined distance so that reaction produces from the counter electrode arrive at the working electrode. An electric potential difference can be applied between the electrodes, and the potential of the working electrode can be selected such that the rate of electro-oxidation of the reduced form of the species is diffusion controlled. Current as a function of time can be determined, the magnitude of the steady state current can be estimated, and a value indicative of the diffusion coefficient and/or of the concentration of the reduced form of the species can be obtained from the change in current with time and the magnitude of the steady state current. Other embodiments of apparatuses, devices, and methods are also provided.Type: GrantFiled: January 24, 2012Date of Patent: December 3, 2013Assignee: LifeScan, Inc.Inventors: Alastair McIndoe Hodges, Thomas William Beck, Oddvar Johansen
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Publication number: 20130306493Abstract: Methods for determining a concentration of an analyte in a sample, and the devices and systems used in conjunction with the same, are provided herein. In one exemplary embodiment of a method for determining a concentration of an analyte in a sample, a sample including an analyte is provided in a sample analyzing device having a working and a counter electrode. An electric potential is applied between the electrodes and a first analyte concentration is determined. A second analyte concentration value is calculated from the first analyte concentration value and corrected for temperature effects, fill time and capacitance to provide for a final analyte concentration value.Type: ApplicationFiled: December 31, 2010Publication date: November 21, 2013Applicant: LIFESCAN, INC.Inventors: Ronald C. Chatelier, Alastair M. Hodges
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Patent number: 8551320Abstract: Methods for calculating an analyte concentration of a sample are provided. In one exemplary embodiment the method includes steps that are directed toward accounting for inaccuracies that occur as a result of temperature variations in a sample, a meter, or the surrounding environment. In another exemplary embodiment the method includes steps that are directed toward determining whether an adequate sample is provided in a meter because insufficient samples can result in inaccuracies. The methods that are provided can be incorporated into a variety of mechanisms, but they are primarily directed toward glucose meters for blood samples and toward meters for controls solutions.Type: GrantFiled: May 13, 2009Date of Patent: October 8, 2013Assignee: LifeScan, Inc.Inventors: Alastair M. Hodges, Ronald C. Chatelier
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Patent number: 8529751Abstract: Described herein are systems and methods for distinguishing between a control solution and a blood sample. In one aspect, the methods include using a test strip in which multiple current transients are measured by a meter electrically connected to an electrochemical test strip. The current transients are used to determine if a sample is a blood sample or a control solution based on at least two characteristics. Further described herein are methods for calculating a discrimination criteria based upon at least two characteristics. Still further described herein are system for distinguishing between blood samples and control solutions.Type: GrantFiled: March 31, 2006Date of Patent: September 10, 2013Assignee: LifeScan, Inc.Inventors: Ronald C. Chatelier, Alastair McIndoe Hodges, Maria Teodorczyk, Remedios Dato
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Patent number: 8486243Abstract: The present invention relates to electrochemical cells including a first working electrode 32, a first counter electrode 34, a second working electrode 36, and a second counter electrode 38, wherein the electrodes are spaced such that reaction products from the first counter electrode 34 arrive at the first working electrode 32, and reaction products from the first and second counter electrodes 34, 38 do not reach the second working electrode 36. Also provided is a method of using such electrochemical cells for determining the concentration of a reduced or oxidized form of a redox species with greater accuracy than can be obtained using an electrochemical cell having a single working and counter electrode.Type: GrantFiled: August 22, 2008Date of Patent: July 16, 2013Assignee: LifeScan, Inc.Inventor: Alastair M. Hodges
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Patent number: 8486649Abstract: Methods of determining a corrected analyte concentration in view of some error source are provided herein. The methods can be utilized for the determination of various analytes and/or various sources of error. In one example, the method can be configured to determine a corrected glucose concentration in view of an extreme level of hematocrit found within the sample. In other embodiments, methods are provided for identifying various system errors and/or defects. For example, such errors can include partial-fill or double-fill situations, high track resistance, and/or sample leakage. Systems are also provided for determining a corrected analyte concentration and/or detecting some system error.Type: GrantFiled: January 6, 2009Date of Patent: July 16, 2013Assignee: LifeScan, Inc.Inventors: Ronald C. Chatelier, Alastair M. Hodges, Santhanagopalan Nandagopalan
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Patent number: 8449740Abstract: Described herein are systems and methods for distinguishing between a control solution and a blood sample. In one aspect, the methods include using a test strip in which multiple current transients are measured by a meter electrically connected to an electrochemical test strip. The current transients are used to determine if a sample is a blood sample or a control solution based on at least two characteristics. Further described herein are methods for calculating a discrimination criteria based upon at least two characteristics. Still further described herein are system for distinguishing between blood samples and control solutions.Type: GrantFiled: July 21, 2010Date of Patent: May 28, 2013Assignee: LifeScan, Inc.Inventors: Ronald C. Chatelier, Alastair M. Hodges, Maria Teodorczyk, Remedios Dato
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Patent number: 8439837Abstract: The present invention is directed to a method of reducing false readings in a hypoglycemic detector that includes establishing a predetermined hypoglycemic threshold, a predetermined critical threshold, a predetermined rate of change in glucose concentration where the predetermined critical threshold is below the predetermined hypoglycemic threshold. A first sampling rate is then calculated based upon said predetermined hypoglycemic threshold, said predetermined critical threshold, and said predetermined rate of change in glucose concentration.Type: GrantFiled: October 30, 2007Date of Patent: May 14, 2013Assignee: LifeScan, Inc.Inventors: Sharbel E. Noujaim, David Horwitz, Manoj Sharma, Joseph Marhoul
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Publication number: 20130098763Abstract: Methods of determining a corrected analyte concentration in view of some error source are provided herein. The methods can be utilized for the determination of various analytes and/or various sources of error. In one example, the method can be configured to determine a corrected glucose concentration in view of an extreme level of hematocrit found within the sample. In other embodiments, methods are provided for identifying various system errors and/or defects. For example, such errors can include partial-fill or double-fill situations, high track resistance, and/or sample leakage. Systems are also provided for determining a corrected analyte concentration and/or detecting some system error.Type: ApplicationFiled: September 14, 2012Publication date: April 25, 2013Applicant: LifeScan, Inc.Inventors: Ronald C. Chatelier, Alastair M. Hodges, Santhanagopalan Nandagopalan
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Patent number: 8404102Abstract: Methods and apparatus for electrochemically determining an analyte concentration value in a physiological sample are disclosed. The methods include using a test strip in which two time-current transients are measured by a meter electrically connected to an electrochemical test strip. Integrative current values are derived from the time-current transients and used in the calculation of analyte concentration.Type: GrantFiled: July 2, 2010Date of Patent: March 26, 2013Assignee: Lifescan, Inc.Inventors: Sherry Guo, Alastair M. Hodges, Ronald C. Chatelier, Bin Zhang
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Publication number: 20130068633Abstract: Methods of determining a corrected analyte concentration in view of some error source are provided herein. The methods can be utilized for the determination of various analytes and/or various sources of error. In one example, the method can be configured to determine a corrected glucose concentration in view of an extreme level of hematocrit found within the sample. In other embodiments, methods are provided for identifying various system errors and/or defects. For example, such errors can include partial-fill or double-fill situations, high track resistance, and/or sample leakage. Systems are also provided for determining a corrected analyte concentration and/or detecting some system error.Type: ApplicationFiled: September 14, 2012Publication date: March 21, 2013Applicant: LifeScan, Inc.Inventors: Ronald C. Chatelier, Alastair M. Hodges, Santhanagopalan Nandagopalan
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Patent number: 8391940Abstract: Described and illustrated herein are exemplary methods of operating an analyte measurement system having a meter and a test strip. Such methods may be exemplarily achieved by determining a first glucose concentration by measuring a first reflectance at about a first wavelength at a testing surface of the pad; measuring a second reflectance at about a second wavelength; formulating at least one equation to correct the first glucose concentration for temperature or hematocrit effects using the second reflectance at about the second wavelength; determining a second glucose concentration using the first glucose concentration, the second reflectance at about a second wavelength; and displaying the second glucose concentration that is corrected for temperature and hematocrit effects.Type: GrantFiled: February 4, 2010Date of Patent: March 5, 2013Assignee: LifeScan, Inc.Inventors: David P Matzinger, Geoffrey McGarraugh, Jerry T Pugh
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Publication number: 20130039383Abstract: The present invention is directed to, inter alia, systems and methods for calculating a temperature associated with an analyte measurement component of a biosensing instrument (such as a blood glucose monitor), with a test strip that is inserted in a biosensing instrument, or both. The present systems and methods may employ at least two temperature sensors, and the acquired temperature information may be used to modulate data regarding an analyte in a biological sample, thereby providing a more accurate measurement of the analyte.Type: ApplicationFiled: October 16, 2012Publication date: February 14, 2013Applicant: LIFESCAN, INC.Inventors: THOMAS JETTER, KLAUS NEUBERT, THOMAS M. WEBER, MAHYAR Z. KERMANI
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Publication number: 20130008804Abstract: Methods for calculating an analyte concentration of a sample are provided. In one exemplary embodiment the method includes steps that are directed toward accounting for inaccuracies that occur as a result of temperature variations in a sample, a meter, or the surrounding environment. In another exemplary embodiment the method includes steps that are directed toward determining whether an adequate sample is provided in a meter because insufficient samples can result in inaccuracies. The methods that are provided can be incorporated into a variety of mechanisms, but they are primarily directed toward glucose meters for blood samples and toward meters for controls solutions.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Applicant: LifeScan, Inc.Inventors: Alastair M. Hodges, Ronald C. Chatelier
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Publication number: 20130006536Abstract: A hand-held test meter for use with an analytical test strip in the determination of an analyte (such as glucose) in a bodily fluid sample (for example, a whole blood sample) includes a housing, a test meter control circuit block, and a Universal Serial Bus (USB) connector block that includes an unpowered USB connection detection circuit block. The unpowered USB connection detection circuit block is configured to provide a shielding signal of a first potential (for example, a high-level signal) to the test meter circuit control block when a USB connection to an external device has been made to the USB connector block and a shielding signal of a second potential (such as a low-level signal representative of ground) to the test meter control circuit block when a USB connection to a an device has been made to the USB connector block.Type: ApplicationFiled: June 28, 2011Publication date: January 3, 2013Applicant: LifeScan, Inc.Inventors: Ulrich KRAFT, Manfred EBNER
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Publication number: 20130002266Abstract: A hand-held test meter for use with an analytical test strip in the determination of an analyte (such as glucose) in a bodily fluid sample (for example, a whole blood sample) includes a housing, a test meter control circuit block, and an electromagnetic interference detection circuit block with an antenna configured to sense electromagnetic fields of a predetermined frequency. The electromagnetic interference detection circuit block is configured to generate a signal representative of an electromagnetic field sensed by the antenna and to provide that signal to the test meter control circuit block. In addition, the test meter control circuit block is configured to interrupt operation of the hand-held test meter when the signal received from the electromagnetic interference detection circuit block is represents an electromagnetic field that interferes with the hand-held test meter's operation.Type: ApplicationFiled: June 28, 2011Publication date: January 3, 2013Applicant: LifeScan, Inc.Inventor: Ulrich KRAFT
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Publication number: 20130001103Abstract: Methods for distinguishing between an aqueous non-blood sample (e.g., a control solution) and a blood sample. In one aspect, the methods include using a test strip in which multiple current transients are measured by a meter electrically connected to an electrochemical test strip. The current transients are used to determine if a sample is a blood sample or an aqueous non-blood sample based on at least two characteristics (e.g., amount of interferent present and reaction kinetics). The method can also include calculating a discrimination criteria based upon at least two characteristics. Various aspects of a system for distinguishing between blood samples and an aqueous non-blood sample are also provided herein.Type: ApplicationFiled: September 12, 2012Publication date: January 3, 2013Applicant: LifeScan, Inc.Inventors: Ronald C. Chatelier, Alastair M. Hodges
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Patent number: RE44330Abstract: This invention relates to a biosensor and more particularly to an electrochemical biosensor for determining the concentration of an analyte in a carrier. The invention is particularly useful for determining the concentration of glucose in blood and is described herein with reference to that use but it should be understood that the invention is applicable to other analytic determinations.Type: GrantFiled: May 4, 2011Date of Patent: July 2, 2013Assignee: LifeScan Inc.Inventors: Alastair M. Hodges, Thomas W. Beck, Oddvar Johansen