Systems and methods of multispectral blood measurement
First Claim
1. A system comprising:
- a flexible wrist band;
a plurality of light emitting diodes secured to the flexible wrist band, a first of the plurality of light emitting diodes configured to project energy at a first wavelength into tissue of a wearer and a second of the plurality of light emitting diodes configured to project energy at a second wavelength into the tissue of the wearer, the first wavelength and the second wavelength being associated with different analyte concentrations in blood of the wearer;
at least one photo detector secured to the flexible wrist band, the at least one photo detector being adjacent to the plurality of light emitting diodes and configured to generate a composite signal based on a fraction of the energy at the first wavelength and the second wavelength, the fraction of the energy being reflected by the tissue of the wearer; and
a processor configured to;
separate the composite signal into a first signal corresponding to the first wavelength and a second signal corresponding to the second wavelength, and detect, in the blood of the wearer, a first analyte concentration measurement of a first analyte and a second analyte concentration measurement of a second analyte within the blood of the wearer based on the first signal and the second signal, respectively;
apply a Kalman filter to the first analyte concentration measurement and the second analyte concentration measurement;
compare a result of the application of the Kalman filter to the first analyte concentration measurement and the second analyte concentration measurement with at least one threshold associated with motion of the wearer to determine if at least the first analyte concentration measurement or the second analyte concentration measurement is abnormal as being influenced by the motion of the wearer;
if the first analyte concentration measurement and the second analyte concentration measurement are abnormal based on the comparison, remove abnormal measurements associated with the motion of the wearer; and
if the first analyte concentration measurement and the second analyte concentration measurement are not determined to be abnormal based on the comparison, obtain a first analyte concentration of the first analyte and a second analyte concentration of the second analyte based at least on an assessment of the first analyte concentration measurement and a second analyte concentration measurement in a frequency domain.
5 Assignments
0 Petitions
Accused Products
Abstract
An exemplary system comprises an energy transmitter, an energy receiver, and an analyzer. The energy transmitter may project energy at a first wavelength and a second wavelength into tissue of a user, the first wavelength and the second wavelength being associated with at least one nutrient of a set of nutrients in blood of the user. The energy receiver may generate a composite signal based on a fraction of the energy at the first wavelength and the second wavelength, the fraction of the energy being received through the tissue of the user. The analyzer may separate the composite signal into a first signal corresponding to the first wavelength and a second signal corresponding to the second wavelength, and detect, in the blood of the user, a concentration of the at least one nutrient of the set of nutrients based on the first signal and the second signal.
-
Citations
14 Claims
-
1. A system comprising:
-
a flexible wrist band; a plurality of light emitting diodes secured to the flexible wrist band, a first of the plurality of light emitting diodes configured to project energy at a first wavelength into tissue of a wearer and a second of the plurality of light emitting diodes configured to project energy at a second wavelength into the tissue of the wearer, the first wavelength and the second wavelength being associated with different analyte concentrations in blood of the wearer; at least one photo detector secured to the flexible wrist band, the at least one photo detector being adjacent to the plurality of light emitting diodes and configured to generate a composite signal based on a fraction of the energy at the first wavelength and the second wavelength, the fraction of the energy being reflected by the tissue of the wearer; and a processor configured to; separate the composite signal into a first signal corresponding to the first wavelength and a second signal corresponding to the second wavelength, and detect, in the blood of the wearer, a first analyte concentration measurement of a first analyte and a second analyte concentration measurement of a second analyte within the blood of the wearer based on the first signal and the second signal, respectively; apply a Kalman filter to the first analyte concentration measurement and the second analyte concentration measurement; compare a result of the application of the Kalman filter to the first analyte concentration measurement and the second analyte concentration measurement with at least one threshold associated with motion of the wearer to determine if at least the first analyte concentration measurement or the second analyte concentration measurement is abnormal as being influenced by the motion of the wearer; if the first analyte concentration measurement and the second analyte concentration measurement are abnormal based on the comparison, remove abnormal measurements associated with the motion of the wearer; and if the first analyte concentration measurement and the second analyte concentration measurement are not determined to be abnormal based on the comparison, obtain a first analyte concentration of the first analyte and a second analyte concentration of the second analyte based at least on an assessment of the first analyte concentration measurement and a second analyte concentration measurement in a frequency domain. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method comprising:
-
projecting a first wavelength of energy into tissue of a user; projecting a second wavelength of energy into the tissue of the user, the first wavelength and the second wavelength being associated with different analyte concentrations in blood of the user; receiving a fraction of the energy at the first and second wavelengths, the fraction of the energy being reflected by the tissue of the user; generating a composite signal based on the fraction of the energy at the first wavelength and the second wavelength, the fraction of the energy being reflected by the tissue of the user; separating, by a processor, the composite signal into a first signal corresponding to the first wavelength and a second signal corresponding to the second wavelength; detecting, by a processor, a first analyte concentration measurement of a first analyte in the blood of the user based on the first wavelength and a second analyte concentration measurement of a second analyte in the blood of the wearer based on the second wavelength; applying, by a processor, a Kalman filter to the first analyte concentration measurement and the second analyte concentration measurement; comparing, by a processor, a result of the application of the Kalman filter to the first analyte concentration measurement and the second analyte concentration measurement with at least one threshold associated with motion of the wearer to determine if the at least the first analyte concentration measurement or the second analyte concentration measurement is abnormal as being influenced by the movement of the user; if the first analyte concentration measurement and the second analyte concentration measurement are abnormal based on the comparison, remove abnormal measurements associated with movement by the user; and if the first analyte concentration measurement and the second analyte concentration measurement are not determined to be abnormal based on the comparison, obtain a first analyte concentration of the first analyte and a second analyte concentration of the second analyte based at least on an assessment of the first analyte concentration measurement and the second concentration measurement in a frequency domain. - View Dependent Claims (9, 10, 11, 12, 13)
-
-
14. A system comprising:
-
a flexible wrist band; a plurality of light emitting diodes secured to the flexible wrist band, a first of the plurality of light emitting diodes configured to project energy at a first wavelength into tissue of a wearer and a second of the plurality of light emitting diodes configured to project energy at a second wavelength into the tissue of the wearer, the first wavelength and the second wavelength being associated with different analyte concentrations in blood of the wearer, the different analyte concentrations being at least two selected from a set of components comprising hemoglobin, triglycerides, bilirubin, protein, albumin, blood pH, Hematocrit, cortisol, and electrolytes; at least one photo detector secured to the flexible wrist band, the at least one photo detector being adjacent to the plurality of light emitting diodes and configured to generate a composite signal based on a fraction of the energy at the first wavelength and the second wavelength, the fraction of the energy being reflected by the tissue of the wearer; and a processor configured to; separate the composite signal into a first signal corresponding to the first wavelength and a second signal corresponding to the second wavelength, and to detect, in the blood of the wearer, a first analyte concentration measurement of a first analyte and a second analyte concentration measurement of a second analyte within the blood of the wearer based on the first signal and the second signal, respectively; apply a Kalman filter to the first analyte concentration measurement and the second analyte concentration measurement; compare a result of the application of the Kalman filter to the first analyte concentration measurement and the second analyte concentration measurement with at least one threshold associated with motion of the wearer to determine if at least the first analyte concentration measurement or the second analyte concentration measurement is abnormal as being influenced by the motion of the wearer; if the first analyte concentration measurement and the second analyte concentration measurement are abnormal based on the comparison, remove abnormal measurements associated with movement by the wearer; and if the first analyte concentration measurement and the second analyte concentration measurement are not determined to be abnormal based on the comparison, obtain a first analyte concentration of the first analyte and a second analyte concentration of the second analyte based at least on an assessment of the first analyte concentration measurement and the second analyte concentration measurement in a frequency domain.
-
Specification