Zero corrected optical blood analyte detector
First Claim
1. A non-invasive method for measuring the concentration of an unknown blood analyte present in a patient, which comprises the steps of:
- (a) determining the concentration of a reference analyte present in said patient;
(b) non-invasively, optically measuring the concentrations of said reference analyte and said unknown analyte;
(c) displaying said measured unknown analyte concentration when said measured reference analyte concentration and said determined reference analyte concentration are substantially the same; and
(d) if said measured reference analyte concentration and said determined reference analyte concentration are not substantially the same, applying an adjustment factor to said measured unknown analyte concentration and displaying said unknown analyte concentration.
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Accused Products
Abstract
The present invention is directed to method and apparatus for non-invasively measuring the concentration of an unknown blood analyte present in a patient. The method involves determining the concentration of a reference analyte present in the patient. Using the non-invasive optical instrument of the invention, the concentrations of the reference analyte and unknown analyte are measured. If the measured reference analyte concentration and determined reference analyte concentration are substantially the same, then the measured unknown analyte concentration is displayed. If the measured reference analyte concentration and determined reference analyte concentration are not substantially the same, then an adjustment factor is applied to the measured unknown analyte concentration and the unknown analyte concentration is displayed.
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Citations
17 Claims
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1. A non-invasive method for measuring the concentration of an unknown blood analyte present in a patient, which comprises the steps of:
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(a) determining the concentration of a reference analyte present in said patient; (b) non-invasively, optically measuring the concentrations of said reference analyte and said unknown analyte; (c) displaying said measured unknown analyte concentration when said measured reference analyte concentration and said determined reference analyte concentration are substantially the same; and (d) if said measured reference analyte concentration and said determined reference analyte concentration are not substantially the same, applying an adjustment factor to said measured unknown analyte concentration and displaying said unknown analyte concentration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An instrument for non-invasively measuring the concentration of an unknown blood analyte in a patient, which comprises:
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(a) an IR source generating an IR output capable of penetrating through target tissue of said patient to produce a tissue IR output correlative with said reference analyte concentration and said unknown analyte concentration; (b) an optical detectors capable of detecting said tissue IR output; (c) a signal treatment system for converting said tissue IR output into said reference analyte concentration and said unknown analyte concentration; (d) memory capable of storing said determined reference analyte concentration, said measured reference analyte and unknown analyte concentrations, and said adjustment factor; (e) a microprocessor programmed to compare said detected reference analyte concentration to said determined reference analyte concentration and transmit said detected unknown analyte concentration to said display when said detected reference analyte concentration and said determined reference analyte concentration are substantially the same, or to apply said adjustment factor to said unknown analyte concentration and transmit said unknown analyte concentration to said display when said detected reference analyte concentration and said determined reference analyte concentration are not substantially the same; (f) a display for displaying said unknown analyte concentration; and (g) said IR source, said optical detector, said signal treatment system, said memory, said microprocessor, and said display being in communication. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification