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US5204532A
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Method for providing general calibration for near infrared instruments for measurement of blood glucose
Assignee: Futrex Inc
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Filing: 1991-06-18
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Granted: 1993-04-20
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Expires: 2011-06-18
Abstract
Abstract A method is disclosed for accurately providing general calibration of near-infrared quantitative analysis instruments for almost any individual user. The general calibration method comprises comparing an individual's near-infrared spectrum to a plurality of near-infrared spectral clusters. Each near-infrared spectral cluster has a set of calibration constants associated therewith. The calibration constants of the spectral cluster most closely associated with the individual spectra are used to custom calibrate the near-infrared analysis measurement instrument.
Inventors
- 👤 Robert D. Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/359; A; A61; A61B; A61B5/00; A61B5/145; A61B5/14532; A61B5/1455; A61B5/1495; A61N; A61N5/00; A61N5/06; G01N21/27; G01N21/274; G01N21/314; G01N2201/00; G01N2201/12; G01N2201/129
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
A method for calibrating a near-infrared analysis instrument for the measurement of a blood analyte, said method comprising: (a) obtaining a near-infrared optical absorption measurement through a body part of an individual; (b) comparing said optical absorption measurement with each spectral cluster of a plurality of spectral clusters, each of said spectral clusters having a set of calibration constants associated therewith; (c) identifying which of said plurality of spectral clusters corresponds to said optical absorption measurement; and (d) applying the set of calibration constants associated with the identified spectral cluster to said near-infrared optical absorption measurements to obtain a measurement of said blood analyte.
Claim 2
Independent Claim
104 words
A method for calibrating a near-infrared analysis instrument for the measurement of a blood analyte, said method comprising: (a) obtaining a near-infrared optical absorption measurement through a body part of an individual; (b) comparing said optical absorption measurement with each spectral cluster of a plurality of spectral clusters, each of said spectral clusters having a set of calibration constants associated therewith; (c) identifying which of said plurality of spectral clusters corresponds to said optical absorption measurement; and (d) applying the set of calibration constants associated with the identified spectral cluster to said near-infrared optical absorption measurements to obtain a measurement of said blood analyte.
Claim 3
Dependent Claim
25 words
The method as set forth in claim 1, wherein said near-infrared optical measurement is made using energy of between about 600 to about 1000 nanometers.
Claim 4
Dependent Claim
19 words
The method as set forth in claim 1, wherein said plurality of spectral cluster is approximately six spectral clusters.
Claim 5
Dependent Claim
16 words
The method as set forth in claim 1, wherein said blood analyte is blood glucose levels.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |