Raman spectroscopy for detection of glycated analytes
First Claim
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1. A method for detecting of one or more analytes in a sample using Raman shifted light, comprising the steps of:
- obtaining a solution including the sample from a patient, the sample comprising a glycated analyte;
concentrating the sample from the patient to form a concentrated sample;
illuminating the concentrated sample with light from a light source such that at least a portion of the sample emits Raman shifted light;
detecting the Raman shifted light and generating Raman spectral data for the glycated analyte in the concentrated sample; and
analyzing the Raman spectral data to determine a level of at least the glycated analyte in the sample.
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Abstract
The present invention relates to the optical measurement of blood analytes, such as glycated hemoglobin (HbA1c) and serum albumin as a functional metric of mean blood glucose in the diagnosis of diabetic patients. Non-enhanced Raman spectroscopy is employed as the analytical method for quantitative detection of blood analytes. Using processing techniques, non-enzymatic glycosylation (glycation) of the analytes results in measurable and highly reproducible changes in the acquired spectral data, which enable the accurate measurements and classification of glycated and unglycated analytes.
57 Citations
39 Claims
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1. A method for detecting of one or more analytes in a sample using Raman shifted light, comprising the steps of:
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obtaining a solution including the sample from a patient, the sample comprising a glycated analyte; concentrating the sample from the patient to form a concentrated sample; illuminating the concentrated sample with light from a light source such that at least a portion of the sample emits Raman shifted light; detecting the Raman shifted light and generating Raman spectral data for the glycated analyte in the concentrated sample; and analyzing the Raman spectral data to determine a level of at least the glycated analyte in the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for detecting a glycated analyte in a sample using Raman shifted light comprising:
- a sample processing concentrator device to concentrate a sample from a patient that includes a glycated analyte;
a light delivery system to illuminate the concentrated sample with light;
a detector that detects Raman shifted light from the glycated analyte in the concentrated sample, the detector generating Raman spectral data; and
a data processor that processes the Raman spectral data, the data processor being programmed with instructions to determine a quantitative concentration level of at least the glycated analyte in the sample. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
- a sample processing concentrator device to concentrate a sample from a patient that includes a glycated analyte;
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30. A method for simultaneous detection of glycated hemoglobin and glycated serum albumin comprising the steps of:
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obtaining a solution including a sample from a patient, the sample comprising hemoglobin and serum albumin; depositing a portion of the solution onto a surface and drying the solution to form a dried concentrated sample; acquiring Raman spectral data from the dried sample; and analyzing the Raman spectral data to determine levels of glycated hemoglobin and serum albumin. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification