Raghavendhar V Gautham

US Patent:

20120108933, May 3, 2012

Filed:

Sep 21, 2011

Appl. No.:

13/239265

Inventors:

Bradley Liang - Bloomfield Hills MI, US
Kenneth W. Cooper - Newhall CA, US
Raghavendhar Gautham - Los Angeles CA, US
Rajiv Shah - Rancho Palos Verdes CA, US
Keith Nogueira - Northridge CA, US

Assignee:

MEDTRONIC MINIMED, INC. - Northridge CA

International Classification:

A61B 5/145

US Classification:

600365

Abstract:

The subject matter disclosed herein relates to systems, methods and/or devices for calibrating sensor data to be used in estimating a blood glucose concentration. A relationship between sensor signal values and reference readings may be used to estimate a relationship between sensor signal values and measurements of blood glucose concentration.

US Patent:

20120108935, May 3, 2012

Filed:

Oct 26, 2011

Appl. No.:

13/282228

Inventors:

Bradley Liang - Bloomfield Hills MI, US
Kenneth W. Cooper - Newhall CA, US
Raghavendhar Gautham - Los Angeles CA, US
Rajiv Shah - Rancho Palos Verdes CA, US

International Classification:

A61B 5/145
G01N 33/48

US Classification:

600365, 73 102

Abstract:

Disclosed are methods, apparatuses, etc. for glucose sensor signal reliability analysis.

US Patent:

20120125075, May 24, 2012

Filed:

Oct 26, 2011

Appl. No.:

13/282128

Inventors:

Rebecca K. Gottlieb - Culver City CA, US
Ying Luo - Stevenson Ranch CA, US
Raghavendhar Gautham - Los Angeles CA, US
Bradley Liang - Bloomfield Hills MI, US
Anirban Roy - Calabasas CA, US
Kenneth W. Cooper - Newhall CA, US
Rajiv Shah - Rancho Palos Verdes CA, US
Barry Keenan - Hollywood CA, US

Assignee:

MEDTRONIC MINIMED, INC. - Northridge CA

International Classification:

G01N 35/00

US Classification:

73 102

Abstract:

Disclosed are a system and method for determining a metric and/or indicator of a reliability of a blood glucose sensor in providing glucose measurements. In one aspect, the metric and/or indicator may be computed based, at least in part, on an observed trend associated with signals generated by the blood glucose sensor.

US Patent:

20130313130, Nov 28, 2013

Filed:

Feb 27, 2013

Appl. No.:

13/779271

Inventors:

Katherine T. Wolfe - Dunwoody GA, US
Raghavendhar Gautham - Los Angeles CA, US
Bradley Chi Liang - Bloomfiled Hills MI, US
Rajiv Shah - Rancho Palos Verdes CA, US

International Classification:

C12Q 1/00
G01N 27/327

US Classification:

205792, 20440301, 20440314, 29874

Abstract:

The invention disclosed herein includes sensors having three dimensional configurations that allow expansive “360” sensing (i.e. sensing analyte from multiple directions) in the environments in which such sensors are disposed. Embodiments of the invention provide analyte sensors having foldable substrates adapted to produce optimized configurations of electrode 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.

US Patent:

20130328572, Dec 12, 2013

Filed:

Feb 27, 2013

Appl. No.:

13/778391

Inventors:

Michael E. Miller - Culver City CA, US
Raghavendhar Gautham - Los Angeles CA, US
Yiwen Li - Arcadia CA, US
Rajiv Shah - Rancho Palos Verdes CA, US

International Classification:

G01R 35/00

US Classification:

324601

Abstract:

A diagnostic Electrochemical Impedance Spectroscopy (EIS) procedure is applied to measure values of impedance-related parameters for one or more sensing electrodes. The parameters may include real impedance, imaginary impedance, impedance magnitude, and/or phase angle. The measured values of the impedance-related parameters are then used in performing sensor diagnostics, calculating a highly-reliable fused sensor glucose value based on signals from a plurality of redundant sensing electrodes, calibrating sensors, detecting interferents within close proximity of one or more sensing electrodes, and testing surface area characteristics of electroplated electrodes. Advantageously, impedance-related parameters can be defined that are substantially glucose-independent over specific ranges of frequencies. An Application Specific Integrated Circuit (ASIC) enables implementation of the EIS-based diagnostics, fusion algorithms, and other processes based on measurement of EIS-based parameters.

US Patent:

20130331674, Dec 12, 2013

Filed:

Feb 27, 2013

Appl. No.:

13/778630

Inventors:

Raghavendhar Gautham - Los Angeles CA, US
Bradley C. Liang - Bloomfield Hills MI, US
Rajiv Shah - Rancho Palos Verdes CA, US
Catherine M. Szyman - Westlake Village CA, US
Michael E. Miller - Culver City CA, US
Yiwen Li - Arcadia CA, US
Wayne A. Morgan - Northridge CA, US
Paris Chen - Chino Hills CA, US
Robert C. Mucic - Glendale CA, US
Genival D. de Barros - Porter Ranch CA, US
Carlos A. Callirgos - Northridge CA, US
Manjunath Sirigiri - Northridge CA, US
Joseph Paul Brinson - Valencia CA, US

International Classification:

G01R 35/00
A61B 5/145

US Classification:

600347, 324600, 324601, 702 65

Abstract:

A diagnostic Electrochemical Impedance Spectroscopy (EIS) procedure is applied to measure values of impedance-related parameters for one or more sensing electrodes. The parameters may include real impedance, imaginary impedance, impedance magnitude, and/or phase angle. The measured values of the impedance-related parameters are then used in performing sensor diagnostics, calculating a highly-reliable fused sensor glucose value based on signals from a plurality of redundant sensing electrodes, calibrating sensors, detecting interferents within close proximity of one or more sensing electrodes, and testing surface area characteristics of electroplated electrodes. Advantageously, impedance-related parameters can be defined that are substantially glucose-independent over specific ranges of frequencies. An Application Specific Integrated Circuit (ASIC) enables implementation of the EIS-based diagnostics, fusion algorithms, and other processes based on measurement of EIS-based parameters.

US Patent:

20130332085, Dec 12, 2013

Filed:

Feb 27, 2013

Appl. No.:

13/778416

Inventors:

Raghavendhar Gautham - Los Angeles CA, US
Bradley C. Liang - Bloomfield Hills MI, US
Rajiv Shah - Rancho Palos Verdes CA, US

International Classification:

G01N 27/02
G01N 33/66

US Classification:

702 22

Abstract:

A diagnostic Electrochemical Impedance Spectroscopy (EIS) procedure is applied to measure values of impedance-related parameters for one or more sensing electrodes. The parameters may include real impedance, imaginary impedance, impedance magnitude, and/or phase angle. The measured values of the impedance-related parameters are then used in performing sensor diagnostics, calculating a highly-reliable fused sensor glucose value based on signals from a plurality of redundant sensing electrodes, calibrating sensors, detecting interferents within close proximity of one or more sensing electrodes, and testing surface area characteristics of electroplated electrodes. Advantageously, impedance-related parameters can be defined that are substantially glucose-independent over specific ranges of frequencies. An Application Specific Integrated Circuit (ASIC) enables implementation of the EIS-based diagnostics, fusion algorithms, and other processes based on measurement of EIS-based parameters.

US Patent:

20120103835, May 3, 2012

Filed:

Oct 26, 2011

Appl. No.:

13/282166

Inventors:

Bradley Liang - Bloomfield Hills MI, US
Kenneth W. Cooper - Newhall CA, US
Raghavendhar Gautham - Los Angeles CA, US
Rajiv Shah - Rancho Palos Verdes CA, US

International Classification:

G01N 33/66
G01N 27/327

US Classification:

205782, 20440301

Abstract:

The subject matter disclosed herein relates to systems, methods and/or devices for calibrating sensor data to be used in estimating a blood glucose concentration. A relationship between sensor signal values and reference readings may be used to estimate a relationship between sensor signal values and measurements of blood glucose concentration.