Patents by Inventor Gopikrishnan Soundararajan
Gopikrishnan Soundararajan 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: 20110048938Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: ApplicationFiled: September 21, 2010Publication date: March 3, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: RAJIV SHAH, Wayne A. Morgan, David Y. Choy, James L. Henke, Bahar Reghabi, Gopikrishnan Soundararajan, Peter Schultz, Udo Hoss
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Publication number: 20110010105Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: ApplicationFiled: September 21, 2010Publication date: January 13, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: RAJIV SHAH, Wayne A. Morgan, David Y. Choy, James L. Henke, Bahar Reghabi, Gopikrishnan Soundararajan, Peter Schultz, Udo Hoss
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Publication number: 20110010104Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: ApplicationFiled: September 21, 2010Publication date: January 13, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: RAJIV SHAH, Wayne A. Morgan, David Y. Choy, James L. Henke, Bahar Reghabi, Gopikrishnan Soundararajan, Peter Schultz, Udo Hoss
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Publication number: 20100280347Abstract: Embodiments of the invention provide analyte sensors having optimized permselective membranes and methods for making and using such sensors. Embodiments of the invention also provide analyte sensors such as those having porous matrices coated with an analyte sensing composition and methods for making and using such sensors. Illustrative embodiments include electrochemical glucose sensors having glucose oxidase coatings.Type: ApplicationFiled: May 20, 2010Publication date: November 4, 2010Applicant: MEDTRONIC MINIMED, INC.Inventors: Rajiv Shah, Gopikrishnan Soundararajan, Rebecca K. Gottlieb, Udo Hoss, Eric A. Grovender, Shaun M. Pendo
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Publication number: 20100279377Abstract: Embodiments of the invention provide analyte sensors having optimized permselective membranes and methods for making and using such sensors. Embodiments of the invention also provide analyte sensors such as those having porous matrices coated with an analyte sensing composition and methods for making and using such sensors. Illustrative embodiments include electrochemical glucose sensors having glucose oxidase coatings.Type: ApplicationFiled: May 20, 2010Publication date: November 4, 2010Applicant: MEDTRONIC MINIMED, INC.Inventors: Rajiv Shah, Gopikrishnan Soundararajan, Rebecca K. Gottlieb, Udo Hoss, Eric A. Grovender, Shaun M. Pendo
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Patent number: 7813780Abstract: Embodiments of the invention provide analyte sensors having optimized permselective membranes and methods for making and using such sensors. Embodiments of the invention also provide analyte sensors such as those having porous matrices coated with an analyte sensing composition and methods for making and using such sensors. Illustrative embodiments include electrochemical glucose sensors having glucose oxidase coatings.Type: GrantFiled: December 13, 2005Date of Patent: October 12, 2010Assignee: Medtronic MiniMed, Inc.Inventors: Rajiv Shah, Gopikrishnan Soundararajan, Rebecca K. Gottlieb, Udo Hoss, Eric A. Grovender, Shaun M. Pendo
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Publication number: 20100175992Abstract: Embodiments of the invention provide electrochemical analyte sensors having elements designed to modulate their electrochemical reactions as well as methods for making and using such sensors.Type: ApplicationFiled: March 25, 2010Publication date: July 15, 2010Applicant: MEDTRONIC MINIMED, INC.Inventors: Rajiv Shah, Udo Hoss, Rebecca K. Gottlieb, Gopikrishnan Soundararajan, James D. Holker
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Publication number: 20100096278Abstract: Embodiments of the invention provide electrochemical analyte sensors having elements designed to modulate their electrochemical reactions as well as methods for making and using such sensors.Type: ApplicationFiled: December 22, 2009Publication date: April 22, 2010Applicant: MEDTRONIC MINIMED, INC.Inventors: Rajiv Shah, Udo Hoss, Rebecca K. Gottlieb, Gopikrishnan Soundararajan, James D. Holker
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Publication number: 20100025238Abstract: Embodiments of the invention provide analyte sensors having optimized elements and/or configurations of elements as well as methods for making and using such sensors. Typical embodiments of the invention include glucose sensors used in the management of diabetes.Type: ApplicationFiled: July 31, 2008Publication date: February 4, 2010Applicant: MEDTRONIC MINIMED, INC.Inventors: Rebecca K. Gottlieb, Rajiv Shah, Katherine T. Wolfe, Gopikrishnan Soundararajan, Kenneth W. Cooper, Ratnakar Veljella, Enjoo Jin, Brian T. Kannard, John J. Mastrototaro
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Publication number: 20090198117Abstract: Embodiments of the invention provide analyte sensors having nanostructured electrodes as well as methods for making and using such sensors. In certain embodiments of the invention, the sensor includes a carbon nanotube electrode and a analyte limiting membrane that modulates the ability of a analyte to contact the carbon nanotube electrode.Type: ApplicationFiled: January 28, 2009Publication date: August 6, 2009Applicant: MEDTRONIC MINIMED, INC.Inventors: Kenneth W. Cooper, Ratnakar Vejella, Gopikrishnan Soundararajan, Rajiv Shah
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Publication number: 20080156661Abstract: According to an embodiment of the invention, a method of determining hydration of a sensor having a plurality of electrodes is disclosed. In particular embodiments, the method couples a sensor electronics device to the sensor and measures the open circuit potential between at least two of the plurality of electrodes. Then, the open circuit potential measurement is compared to a predetermined value. In some embodiments, the plurality of electrodes includes a working electrode, a reference electrode, and a counter electrode. In still further embodiments, the open circuit potential between the working electrode and the reference electrode is measured. In other embodiments, the open circuit potential between the working electrode and the counter electrode is measured. In still other embodiments, the open circuit potential between the counter electrode and the reference electrode is measured.Type: ApplicationFiled: December 28, 2007Publication date: July 3, 2008Applicant: MEDTRONIC MINIMED, INC.Inventors: Kenneth W. Cooper, David Y. Choy, Rajiv Shah, Gopikrishnan Soundararajan, Ratnakar Vejella
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Publication number: 20080027287Abstract: The disclosure provides a sensor including a sensor having an external surface and a cannula. The cannula comprises a substantially cylindrical wall encircling a lumen, at least one aperture and a distal end. The sensor is positioned within the lumen and the distal end of the cannula extends beyond the sensor. This configuration functions for example to stabilize chemical reactions associated with the sensor by creating a buffer zone between the sensor and the surrounding tissues at the site of implantation. In certain embodiments, the sensor can further comprise an accessory material in proximity to the external surface, wherein the accessory material modifies the biological response of a tissue that is in contact with the sensor. The sensor can also comprise anchors that keeps the sensor in contact with subcutaneous tissue of a subject upon insertion of the sensor into the body of the subject.Type: ApplicationFiled: July 26, 2006Publication date: January 31, 2008Inventors: Rajiv Shah, Udo Hoss, Gopikrishnan Soundararajan, Nannette M. Van Antwerp, Barry Pham
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Publication number: 20070227907Abstract: Embodiments of the invention provide electrochemical analyte sensors having elements designed to modulate their electrochemical reactions as well as methods for making and using such sensors.Type: ApplicationFiled: April 4, 2006Publication date: October 4, 2007Inventors: Rajiv Shah, Udo Hoss, Rebecca K. Gottlieb, Gopikrishnan Soundararajan, James D. Holker
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Publication number: 20070169533Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: ApplicationFiled: December 30, 2005Publication date: July 26, 2007Applicant: Medtronic MiniMed, Inc.Inventors: Rajiv Shah, Wayne A. Morgan, David Y. Choy, James L. Henke, Bahar Reghabi, Gopikrishnan Soundararajan, Peter Schultz, Udo Hoss
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Publication number: 20070173712Abstract: A blood glucose sensing system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes stabilization circuitry. The stabilization circuitry cases a first voltage to be applied to one of the electrodes for a first timeframe and causes a second voltage to be applied to one of the electrodes for a second timeframe. The stabilization circuitry repeats the application of the first voltage and the second voltage to continue the anodic-cathodic cycle. The sensor electronics device may include a power supply, a regulator, and a voltage application device, where the voltage application device receives a regulator voltage from the regulator, applies a first voltage to an electrode for the first timeframe, and applies a second voltage to an electrode for the second timeframe.Type: ApplicationFiled: December 30, 2005Publication date: July 26, 2007Applicant: MEDTRONIC MINIMED, INC.Inventors: Rajiv Shah, Bahar Reghabi, James L. Henke, Wayne A. Morgan, Gopikrishnan Soundararajan, David Y. Choy, Peter Schultz, Udo Hoss
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Publication number: 20070135698Abstract: Embodiments of the invention provide analyte sensors having optimized permselective membranes and methods for making and using such sensors. Embodiments of the invention also provide analyte sensors such as those having porous matrices coated with an analyte sensing composition and methods for making and using such sensors. Illustrative embodiments include electrochemical glucose sensors having glucose oxidase coatings.Type: ApplicationFiled: December 13, 2005Publication date: June 14, 2007Inventors: Rajiv Shah, Gopikrishnan Soundararajan, Rebecca Gottlieb, Udo Hoss, Eric Grovender, Shaun Pendo
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Publication number: 20060081064Abstract: A micromachined sensor for measuring vascular parameters, such as fluid shear stress, includes a substrate having a front-side surface, and a backside surface opposite the front-side surface. The sensor includes a diaphragm overlying a cavity etched within the substrate, and a heat sensing element disposed on the front-side surface of the substrate and on top of the cavity and the diaphragm. The heat sensing element is electrically couplable to electrode leads formed on the backside surface of the substrate. The sensor includes an electronic system connected to the backside surface and configured to measure a change in heat convection from the sensing element to surrounding fluid when the sensing element is heated by applying an electric current thereto, and further configured to derive from the change in heat convection vascular parameters such as the shear stress of fluid flowing past the sensing element.Type: ApplicationFiled: August 4, 2005Publication date: April 20, 2006Inventors: Tzung Hsiai, Gopikrishnan Soundararajan, E. Kim, Hongyu Yu, Mahsa Rouhanizadeh, Tiantian Lin
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Publication number: 20060076236Abstract: The disclosure provides methods for fabricating a long-term analyte sensor for measuring at least one analyte in the body of a user. The analyte sensors made by these methods include a plurality of analyte contacting sensor elements and at least one structure for relaying information to and from the sensor. The analyte sensor so fabricated further includes at least one sensor protection membrane that is controllable in a manner such that sensor elements may be activated (e.g. exposed to the external environment) at different times so as to extend the useful life of the sensor. In illustrative analyte sensors, the analyte is glucose.Type: ApplicationFiled: January 12, 2005Publication date: April 13, 2006Inventors: Rajiv Shah, Shaun Pendo, Rebecca Gottlieb, Gil Bruso, Gopikrishnan Soundararajan, Katherine Wolfe