Integrated thermo-photonic chemical sensor
AssigneeCardiac Pacemakers, Inc.
InventorsYingbo Li, Michael J. Kane
Life of this patent
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Abstract
Embodiments herein relate to integrated thermo-photonic chemical sensors as part of an implantable sensing device. In a first aspect, an implantable sensing device is included having a sensing element, an optical excitation assembly configured to illuminate the sensing element, an optical detection assembly configured to receive optical signals from the sensing element, and a control circuit, wherein the control circuit is configured to receive signals from the optical detection assembly, receive signals reflecting temperature, and process signals from the optical detection assembly while adjusting for the signals reflecting temperature. Other embodiments are also included herein.
Claims15
An implantable sensing device comprising:
- a sensing element;
- an optical excitation assembly, wherein the optical excitation assembly is configured to illuminate the sensing element;
- an optical detection assembly, wherein the optical detection assembly is configured to receive optical signals from the sensing element;
- and
- a control circuit;
- wherein the control circuit is configured to
- receive signals from the optical detection assembly;
- receive signals reflecting temperature;
- and
- process signals from the optical detection assembly while adjusting for the signals reflecting temperature;
- a discrete temperature sensor disposed adjacent to the optical detection assembly,
- wherein the discrete temperature sensor is configured to send signals to the control circuit;
- wherein the control circuit is configured to direct the discrete temperature sensor to take a temperature measurement at the same time the optical detection assembly receives the optical signals from the sensing element,
- wherein the control circuit is further configured to cycle the implantable sensing device between a first mode and a second mode, the first mode including applying an electrical stimulus to the optical detection assembly and measuring a temperature-dependent electrical property of the optical detection assembly and the second mode including generating signals with the optical detection assembly based on received light from the sensing element, wherein operation in the first mode provides signals reflecting temperature, and
- wherein when in the second mode, an analyte amount is calculated based on the signals from the optical detection assembly while adjusting for the signals reflecting temperature.
An implantable sensing device comprising:
- a sensing element;
- an optical excitation assembly, wherein the optical excitation assembly is configured to illuminate the sensing element;
- an optical detection assembly, wherein the optical detection assembly is configured to receive optical signals from the sensing element;
- and
- a control circuit;
- wherein the control circuit is configured to
- receive signals from the optical detection assembly;
- receive signals reflecting temperature;
- and
- process signals from the optical detection assembly while adjusting for the signals reflecting temperature;
- wherein at least one of the optical excitation assembly and the optical detection assembly is further configured to serve as a temperature sensor;
- and
- wherein the control circuit is further configured to cycle the implantable sensing device between a first mode and a second mode, the first mode including applying an electrical stimulus to the optical detection assembly and measuring a temperature-dependent electrical property of the optical detection assembly and the second mode including generating signals with the optical detection assembly based on received light from the sensing element,
- wherein operation in the first mode provides signals reflecting temperature, and
- wherein when in the second mode, an analyte amount is calculated based on the signals from the optical detection assembly while adjusting for the signals reflecting temperature.
Dependencies are inferred from the claim text.