Patents by Inventor Melissa Tsang
Melissa Tsang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230380730Abstract: An example device includes an electrochemical cell configured to generate a first electrical signal indicative of an amount of glucose in a fluid of a person, the electrochemical cell comprising a working electrode, a counter electrode, and a reference electrode; and a background electrode configured to not catalyze a reaction with glucose and is configured to generate a second electrical signal indicative of an amount of electrochemical interference proximate the electrochemical cell.Type: ApplicationFiled: May 12, 2023Publication date: November 30, 2023Inventors: Ellis Garai, Melissa Tsang, Akhil Srinivasan, Bradley Petkus
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Publication number: 20230241315Abstract: Medical devices and related systems and methods are provided. A method of controlling medication delivery based on sensor input involves obtaining a measurement parameter representing an electrical response of a first instance of a sensing element to a physiological condition of a person. The measurement parameter is converted into a calibrated measurement parameter using calibration data specific to the first instance of the sensing element. The method further involves determining a measurement value using the calibrated measurement parameter as input to a performance model. The performance model is derived from historical calibrated measurement parameters and corresponding reference values. The historical calibrated measurement parameters are from other instances of the sensing element. A command is then determined based on the measurement value and sent to a medical device. The command causes the medical device to deliver a dose of medication influencing the physiological condition of the person.Type: ApplicationFiled: April 7, 2023Publication date: August 3, 2023Inventors: Akhil Srinivasan, Peter Ajemba, Steven C. Jacks, Robert C. Mucic, Tyler R. Wong, Melissa Tsang, Chi-En Lin, Mohsen Askarinya, David Probst
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Publication number: 20230172497Abstract: The invention provides amperometric analyte sensor systems comprising one or more electrodes designed to monitor in vivo levels of 3-hydroxybutyrate (and optionally glucose as well) in order to facilitate the management of diabetic ketoacidosis. The invention further includes dual layer membrane compositions, elements and methods useful with such amperometric analyte sensor systems.Type: ApplicationFiled: November 3, 2022Publication date: June 8, 2023Applicant: Medtronic MiniMed, Inc.Inventors: Jenn-Hann L. Wang, Anna J. Miller, Chi-En Lin, Melissa Tsang, Akhil Srinivasan, Quyen B. Ong
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Patent number: 11654235Abstract: Medical devices and related systems and methods are provided. A method of calibrating an instance of a sensing element involves obtaining fabrication process measurement data from a substrate having the instance of the sensing element fabricated thereon, obtaining a calibration model associated with the sensing element, determining calibration data associated with the instance of the sensing element for converting the electrical signals into a calibrated measurement parameter based on the fabrication process measurement data using the calibration model, and storing the calibration data in a data storage element associated with the instance of the sensing element.Type: GrantFiled: September 12, 2019Date of Patent: May 23, 2023Assignee: MEDTRONIC MINIMED, INC.Inventors: Akhil Srinivasan, Peter Ajemba, Steven C. Jacks, Robert C. Mucic, Tyler R. Wong, Melissa Tsang, Chi-En Lin, Mohsen Askarinya, David Probst
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Publication number: 20230123613Abstract: The invention provides amperometric analyte sensor systems comprising one or more electrodes designed to monitor in vivo levels of 3-hydroxybutyrate (and optionally glucose as well) in order to facilitate the management of diabetic ketoacidosis. The invention further includes compositions, elements and methods useful with such amperometric analyte sensor systems.Type: ApplicationFiled: October 14, 2021Publication date: April 20, 2023Applicant: Medtronic MiniMed, Inc.Inventors: Ashwin K. Rao, Quyen B. Ong, Michael E. Miller, Sarnath Chattaraj, Guangping Zhang, Poonam Gulati, Ariel Reider, Mohsen Askarinya, Michael N. Missaghi, Chi-En Lin, Xin Heng, Inthirai Somasuntharam, Melissa Tsang, Carlos E. Maldonado, Akhil Srinivasan
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Publication number: 20230053254Abstract: A method of testing one or more analyte sensors each comprising a first electrode; a second electrode; and a material layer disposed on or above the first electrode; the method including (a) applying a voltage potential to the first electrode with respect to the second electrode; (b) measuring a test signal comprising an output current from the first electrode that results from the application of the voltage potential; (c) using the test signal from (b) to observe an electrical characteristic of the analyte sensor; and (d) correlating the electrical characteristic a parameter associated with an electrochemical response of the analyte sensor to an analyte, wherein the testing is under dry conditions without exposure of the electrodes to a fluid containing the analyte or an in-vivo environment containing the analyte.Type: ApplicationFiled: August 13, 2021Publication date: February 16, 2023Applicant: Medtronic MiniMed, Inc.Inventors: Chi-En Lin, Akhil Srinivasan, David L. Probst, Melissa Tsang, Mohsen Askarinya, Riley Clayton Kimball, Robert McKinlay, Vu Nguyen, Wally Dong, Xin Heng, Brennan Toshner
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Publication number: 20220395199Abstract: An example method for initializing a glucose sensor includes executing an initialization sequence for the glucose sensor, wherein the initialization sequence is based on one or more of parameters related to manufacturing the glucose sensor or environmental conditions of the glucose sensor that are present in vivo, and reporting glucose levels in a patient after the initialization sequence.Type: ApplicationFiled: June 11, 2021Publication date: December 15, 2022Inventors: Ellis Garai, Sarkis D. Aroyan, Margaret R. Miller, Melissa Tsang
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Publication number: 20220338768Abstract: Embodiments of the invention provide methods and materials for making analyte sensors having a plurality of layered elements such as amperometric glucose sensors that are used by diabetic individuals to monitor blood sugar concentrations. Embodiments of the invention utilize plasma deposition technologies to form thin films of hexamethyldisiloxane useful in such sensors. Sensors that incorporate the thin film compositions formed by these processes exhibit a number of desirable characteristics.Type: ApplicationFiled: April 9, 2021Publication date: October 27, 2022Applicant: Medtronic MiniMed, Inc.Inventors: Melissa Tsang, Michael N. Missaghi, Anna Miller, Chi-En Lin, Mohsen Askarinya, Akhil Srinivasan, Nicole Abraham
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Patent number: 11311215Abstract: The invention includes method and materials designed to measure the material properties (e.g. thickness) of layers of material in a sensor using non-Faradaic EIS (Electrochemical Impedance Spectroscopy) methods. The methods are non-destructive, very sensitive and rapid. Typically in these methods, an AC voltage is applied to the desired material layer while the output current and therefore impedance is measured. This voltage can be applied in multiple frequencies in sweep mode in order to detect both the material and, for example, the thickness of the target material. In this way, EIS allows the characterization of properties of various layers of material disposed in devices such as electrochemical glucose sensors.Type: GrantFiled: April 4, 2019Date of Patent: April 26, 2022Assignee: MEDTRONIC MINIMED, INC.Inventors: Chi-En Lin, David Probst, Mohsen Askarinya, Akhil Srinivasan, Melissa Tsang, Michael E. Miller, Parisa Kamgar
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Publication number: 20220054057Abstract: The invention disclosed herein includes electrode compositions formed from processes that sputter metal in a manner that produces pillar architectures. Embodiments of the invention can be used in analyte sensors having such electrode architectures as well as methods for making and using these sensor electrodes. A number of working embodiments of the invention are shown to be useful in amperometric glucose sensors worn by diabetic individuals. However, the metal pillar structures have wide ranging applicability and should increase surface area and decrease charge density for catalyst layers or electrodes used with sensing, power generation, recording, and stimulation, in vitro and/or in the body, or outside the body.Type: ApplicationFiled: September 3, 2021Publication date: February 24, 2022Applicant: Medtronic MiniMed, Inc.Inventors: Akhil Srinivasan, Melissa Tsang, Robert C. Mucic, Tyler R. Wong, Rui Kong, Barry P. Pham
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Publication number: 20220031205Abstract: An analyte sensor apparatus including a sensing portion including one or more electrodes including a working electrode and one or more contacts for electrically connecting the sensor portion to control circuitry (e.g., a printed circuit board assembly, PCBA); and a circuit comprising the one or more contacts; wherein the circuit detects an electrical connection between the control circuitry without requiring exposure of the sensing portion to a fluid.Type: ApplicationFiled: July 31, 2020Publication date: February 3, 2022Applicant: Medtronic MiniMed, Inc.Inventors: David Yueh-hua Choy, Ellis Garai, Melissa Tsang, Anuj M. Patel
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Publication number: 20210386331Abstract: Methods, systems, and devices for continuous glucose monitoring. More particularly, the methods, systems, and devices describe a working electrode with a GOx sensor and a background electrode in which the background electrode has no GOx sensor. The system may then compare the first signal and the second signal to detect ingestion of a medication by the user. The system may generate a sensor glucose value based on the comparison.Type: ApplicationFiled: June 11, 2020Publication date: December 16, 2021Inventors: SOROUSH HOSSEIN YAZDI, MELISSA TSANG, ELLIS GARAI, SADAF S. SELEH, STEVEN LAI, LUIS A. TORRES, BRADLEY PETKUS, XIN HENG, ZHENZHONG SUN, AKHIL SRINIVASAN, TYLER R. WONG
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Patent number: 11134868Abstract: The invention disclosed herein includes electrode compositions formed from processes that sputter metal in a manner that produces pillar architectures. Embodiments of the invention can be used in analyte sensors having such electrode architectures as well as methods for making and using these sensor electrodes. A number of working embodiments of the invention are shown to be useful in amperometric glucose sensors worn by diabetic individuals. However, the metal pillar structures have wide ranging applicability and should increase surface area and decrease charge density for catalyst layers or electrodes used with sensing, power generation, recording, and stimulation, in vitro and/or in the body, or outside the body.Type: GrantFiled: March 15, 2018Date of Patent: October 5, 2021Assignee: Medtronic MiniMed, Inc.Inventors: Akhil Srinivasan, Melissa Tsang, Robert C. Mucic, Tyler R. Wong, Rui Kong, Barry P. Pham
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Publication number: 20210077717Abstract: Medical devices and related systems and methods are provided. A method of calibrating an instance of a sensing element involves obtaining fabrication process measurement data from a substrate having the instance of the sensing element fabricated thereon, obtaining a calibration model associated with the sensing element, determining calibration data associated with the instance of the sensing element for converting the electrical signals into a calibrated measurement parameter based on the fabrication process measurement data using the calibration model, and storing the calibration data in a data storage element associated with the instance of the sensing element.Type: ApplicationFiled: September 12, 2019Publication date: March 18, 2021Inventors: Akhil Srinivasan, Peter Ajemba, Steven C. Jacks, Robert C. Mucic, Tyler R. Wong, Melissa Tsang, Chi-En Lin, Mohsen Askarinya, David Probst
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Publication number: 20200315504Abstract: The invention includes method and materials designed to measure the material properties (e.g. thickness) of layers of material in a sensor using non-Faradaic EIS (Electrochemical Impedance Spectroscopy) methods. The methods are non-destructive, very sensitive and rapid. Typically in these methods, an AC voltage is applied to the desired material layer while the output current and therefore impedance is measured. This voltage can be applied in multiple frequencies in sweep mode in order to detect both the material and, for example, the thickness of the target material. In this way, EIS allows the characterization of properties of various layers of material disposed in devices such as electrochemical glucose sensors.Type: ApplicationFiled: April 4, 2019Publication date: October 8, 2020Applicant: MEDTRONIC MINIMED, INC.Inventors: Chi-En Lin, David Probst, Mohsen Askarinya, Akhil Srinivasan, Melissa Tsang, Michael E. Miller, Parisa Kamgar
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Publication number: 20190008425Abstract: The invention disclosed herein includes electrode compositions formed from processes that sputter metal in a manner that produces pillar architectures. Embodiments of the invention can be used in analyte sensors having such electrode architectures as well as methods for making and using these sensor electrodes. A number of working embodiments of the invention are shown to be useful in amperometric glucose sensors worn by diabetic individuals. However, the metal pillar structures have wide ranging applicability and should increase surface area and decrease charge density for catalyst layers or electrodes used with sensing, power generation, recording, and stimulation, in vitro and/or in the body, or outside the body.Type: ApplicationFiled: March 15, 2018Publication date: January 10, 2019Applicant: MEDTRONIC MINIMED, INC.Inventors: Akhil Srinivasan, Melissa Tsang, Robert C. Mucic, Tyler R. Wong, Rui Kong, Barry P. Pham