Medtronic Minimed, Inc.

Medical Research Group, Inc.

David Choy

Rajiv Shah

Wayne A Morgan

Gopikrishnan Soundararajan

Peter G Schultz

Udo Hoss

James L Henke

Bahar Reghabi

Ellis Garai

Daniel H Villegas

Philip T Weiss

Paul Milton Meadows

Ronald J Lebel

Varaz Shahmirian

Philip R Glassel

Jesse M Hefner

Al L Mclevish

Brian J Ferry

Paul W Chevalier

Robert C Mucic

Timothy J Starkweather

David Christopher Antonio

Jose J Ruelas

Kenneth W Cooper

Ratnakar Vejella

John Charles Gord

Colin A Chong

Peter Carl Lord

Sam W Bowman, Iv

A sensor assembly for sensing a physiological characteristic of a user includes a power source, a power control switch, and a power latch within a housing. The power control switch is electrically coupled to the power source, and is configured to inhibit delivery of power from the power source to one or more components of the sensor assembly before deployment of the sensor assembly to a user, and deliver power from the power source to the one or more components of the sensor assembly in response to the deployment of the sensor assembly to the user. The power latch is configured to, upon the deployment of the sensor assembly to the user, latch an output of the power control switch to maintain the delivery of power from the power source to the one or more components of the sensor assembly while the sensor assembly is in a deployed state.

Energy management based on an open switch configuration

A sensor assembly for sensing a physiological characteristic includes a power source, a power control switch, and a power latch configured to latch an output of the power control switch. The sensor assembly also includes a power converter coupled to the power control switch. The power converter is configured to step down a voltage of the latched output of the power control switch for delivery of the latched output to one or more components of the sensor assembly. The power control switch is configured to inhibit consumption of power from the power source when the sensor assembly is in a pre-deployment state and output the latched output to the power converter in response to transition of the sensor assembly from the pre-deployment state to a deployed state.

Energy management based on a closed switch configuration

A sensor assembly for sensing a physiological characteristic includes a power source configured to deliver power to one or more components of an electrical subsystem upon deployment of the sensor assembly to a user. A power latch is configured to latch an output of a power control switch for delivery to one or more components of the electrical subsystem upon deployment of the sensor assembly to a user. The power control switch is configured to inhibit delivery of power to the electrical subsystem prior to deployment of the sensor assembly to a user and to deliver the latched output to one or more components of the electrical subsystem in response to deployment of the sensor assembly to a user.

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 causes 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 regulated 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.

Method of and system for stabilization of sensors

A physiological characteristic sensor assembly includes a flexible top housing including a needle port having a central opening, and a flexible lower housing defining a sensor bore through the lower housing, the sensor bore coaxial with the central opening of the needle port. The physiological characteristic sensor assembly also includes an electrical subsystem disposed between the top housing and the lower housing. The electrical subsystem includes a flexible printed circuit board having a sensor contact pad, a physiological characteristic sensor and an electrically conductive adhesive patch. The physiological characteristic sensor has a distal end that extends through the needle port and a proximal end that includes at least one electrical contact. The conductive adhesive patch electrically and physically couples the at least one electrical contact of the physiological characteristic sensor to the sensor contact pad of the flexible printed circuit board.

Flexible physiological characteristic sensor assembly

A sensor introducer for a physiological characteristic sensor assembly includes a sensor introducer body that includes an outer housing that defines an opening to receive the physiological characteristic sensor assembly and an inner housing surrounded by the outer housing. The sensor introducer includes a cradle movable relative to the inner housing from a first position to a second position to deploy the physiological characteristic sensor assembly. The cradle has a cradle flange to receive the physiological characteristic sensor assembly and a cradle body that receives a needle assembly. The cradle body includes at least one locking projection that engages the inner housing to inhibit the movement of the cradle relative to the inner housing in the first position and the at least one locking projection is movable relative to the inner housing to enable the cradle to move from the first position to the second position.

A monitor system to monitor a characteristic of a user is disclosed. A monitor system includes a sensor producing signals indicative of glucose characteristics within the user. The sensor has a connector with a plurality of contacts, at least two contacts being shorted by a fuse trace. The monitor system further includes an electronics package with a package housing. The package housing contains a battery, a package port interfaced with the connector to receive signals from the sensor, and a package processor to process the signals from the sensor. Further included in the monitor system is a fuse system controlled by the package processor that includes a fuse timer, wherein the fuse trace is destroyed after the fuse timer reaches a threshold value.

Sensor detection pads with integrated fuse

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 causes 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 regulated 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.

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.

Methods and systems for detecting the hydration of sensors

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San Gabriel, CA, United States of America

David Choy