Fluorescence-based sensor with multiple indicator grafts
First Claim
Patent Images
1. A system for determining a concentration of an analyte in a medium of a living animal, the system comprising:
- an optical sensor, the sensor including;
a sensor housing;
a first graft covering at least a first portion of the sensor housing;
first indicator molecules embedded in the first graft and having a first optical characteristic responsive to the concentration of the analyte;
a second graft covering at least a second portion of the sensor housing;
second indicator molecules embedded in the second graft and having a second optical characteristic responsive to the concentration of the analyte;
a substrate;
a first light source fabricated in or mounted on the substrate and configured to emit first excitation light to the first indicator molecules in the first graft;
a first signal photodetector fabricated in or mounted on the substrate and configured to receive first emission light emitted by the first indicator molecules and output a signal indicative thereof;
a first reference photodetector fabricated in or mounted on the substrate and configured to receive first reference light and output a signal indicative thereof;
a second light source fabricated in or mounted on the substrate and configured to emit second excitation light to the second indicator molecules in the second graft;
a second signal photodetector fabricated in or mounted on the substrate and configured to receive second emission light emitted by the second indicator molecules and output a signal indicative thereof; and
a second reference photodetector fabricated in or mounted on the substrate and configured to receive second reference light and output a signal indicative thereof; and
a transceiver configured to;
receive the signals indicative of the first signal light, the first reference light, the second signal light, and the second reference light;
determine whether the first graft is damaged or degraded using one or more of the received signals; and
if the first graft is determined to be damaged or degraded, calculate a concentration of the analyte in the medium of the living animal based on the received signals indicative of the second signal light and the second reference light but not the received signals indicative of the first signal light and the first reference light.
12 Assignments
0 Petitions
Accused Products
Abstract
A system including a sensor and a transceiver and configured to determine a concentration of an analyte in a medium of a living animal. The sensor may include first and second signal photodetectors and first and second reference photodetectors, which may each be covered by an associate filter. The first photodetector may receive light emitted from first and second grafts, respectively. The grafts may receive excitation light from one or more light sources. The transceiver may receive signals from the photodetectors of the sensor and may determine the analyte concentration based on the received signals.
11 Citations
35 Claims
-
1. A system for determining a concentration of an analyte in a medium of a living animal, the system comprising:
-
an optical sensor, the sensor including; a sensor housing; a first graft covering at least a first portion of the sensor housing; first indicator molecules embedded in the first graft and having a first optical characteristic responsive to the concentration of the analyte; a second graft covering at least a second portion of the sensor housing; second indicator molecules embedded in the second graft and having a second optical characteristic responsive to the concentration of the analyte; a substrate; a first light source fabricated in or mounted on the substrate and configured to emit first excitation light to the first indicator molecules in the first graft; a first signal photodetector fabricated in or mounted on the substrate and configured to receive first emission light emitted by the first indicator molecules and output a signal indicative thereof; a first reference photodetector fabricated in or mounted on the substrate and configured to receive first reference light and output a signal indicative thereof; a second light source fabricated in or mounted on the substrate and configured to emit second excitation light to the second indicator molecules in the second graft; a second signal photodetector fabricated in or mounted on the substrate and configured to receive second emission light emitted by the second indicator molecules and output a signal indicative thereof; and a second reference photodetector fabricated in or mounted on the substrate and configured to receive second reference light and output a signal indicative thereof; and a transceiver configured to; receive the signals indicative of the first signal light, the first reference light, the second signal light, and the second reference light; determine whether the first graft is damaged or degraded using one or more of the received signals; and if the first graft is determined to be damaged or degraded, calculate a concentration of the analyte in the medium of the living animal based on the received signals indicative of the second signal light and the second reference light but not the received signals indicative of the first signal light and the first reference light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
-
29. A method for determining a concentration of an analyte in a medium of a living animal, the method comprising:
-
using a first signal photodetector to receive first emission light emitted by first indicator molecules of a first graft covering at least a first portion of a sensor housing of an optical sensor, wherein the first indicator molecules have a first optical characteristic responsive to the concentration of the analyte in the medium; using the first signal photodetector to output a signal indicative of an amount of the first emission light received by the first signal photodetector; using a first reference photodetector to receive first reference light and output a signal indicative of an amount of the first reference light received by the first reference photodetector; using a second signal photodetector to receive second emission light emitted by second indicator molecules of a second graft covering at least a second portion of the sensor housing of the optical sensor, wherein the second indicator molecules have a second optical characteristic responsive to the concentration of the analyte in the medium; using the second signal photodetector to output a signal indicative of an amount of the second emission light received by the second signal photodetector; using a second reference photodetector to receive second reference light and output a signal indicative of an amount of the second reference light received by the second reference photodetector; determining that the first graft is damaged or degraded using one or more of the received signals; and if the first graft is determined to be damaged or degraded, calculating a concentration of the analyte in the medium of the living animal based on the signals indicative of the second signal light and the second reference light but not the received signals indicative of the first signal light and the first reference light.
-
-
30. A transceiver for determining a concentration of an analyte in a medium of a living animal, the transceiver comprising:
-
an inductive element configured to receive measurement information from an optical sensor including a sensor housing, a first graft covering at least a first portion of the sensor housing, and a second graft covering at least a second portion of the sensor housing, wherein the first graft includes first indicator molecules having a first optical characteristic responsive to the concentration of the analyte, and the second graft includes second indicator molecules having a second optical characteristic responsive to the concentration of the analyte; and circuitry configured to; determine whether the first graft is damaged or degraded using the received measurement information; and if the first graft is determined to be damaged or degraded, calculate a concentration of the analyte in the medium of the living animal using a signal indicative of the second optical characteristic of the second indicator molecules of the second graft but not a signal indicative of the first optical characteristic of the first indicator molecules of the first graft. - View Dependent Claims (31, 32, 33)
-
-
34. A method for determining a concentration of an analyte in a medium of a living animal, the method comprising:
-
using an inductive element of a transceiver to receive measurement information from an optical sensor including a sensor housing, a first graft covering at least a first portion of the sensor housing, and a second graft covering at least a second portion of the sensor housing, wherein the first graft includes first indicator molecules having a first optical characteristic responsive to the concentration of the analyte, and the second graft includes second indicator molecules having a second optical characteristic responsive to the concentration of the analyte; using the transceiver to determine that the first graft is damaged or degraded based on the received measurement information; and if the first graft is determined to be damaged or degraded, using the transceiver to calculate a concentration of the analyte in the medium of the living animal based on a signal indicative of the second optical characteristic of the second indicator molecules of the second graft but not based on a signal indicative of the first optical characteristic of the first indicator molecules of the first graft. - View Dependent Claims (35)
-
Specification