US4976265A
Expired / Lapsed
US
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Method of detecting enterogastric reflux
Assignee: Consiglio Nazionale delle Richerche
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Filing: 1988-12-20
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Granted: 1990-12-11
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Expires: 2008-12-20
Abstract
Abstract According to the method of detecting enterogastric reflux, the absorption of electromagnetic radiation by the gastric juice is measured at at least two wavelengths of the said radiation, one of said wavelengths corresponding to an absorption peak of a component of the bile and the other having a wavelength value at which the absorption is unaffected by the concentration of bile.
Inventors
- 👤 Riccardo Falcial
- 👤 Annamaria V. Scheggi
- 👤 Francesco Baldini
- 👤 Paolo Bechi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:44
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/0059; A61B5/0082; A61B5/0084; A61B5/42; A61B5/4211; G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/314; G01N21/3151; G01N2021/3181
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A method of detecting enterogastric reflux, comprising the steps of measuring the absorption of electromagnetic radiation by gastric juice of a patient at at least two wavelengths, one of said wavelengths corresponding to an absorption peak of a bile component and another of said wavelengths having a value at which absorption is unaffected by a concentration of said bile determining whether or not there is endogastric reflux based on the measurement of the absorption of the electromagnetic radiation at said wavelengths.
Claim 2
Independent Claim
81 words
A method of detecting enterogastric reflux, comprising the steps of measuring the absorption of electromagnetic radiation by gastric juice of a patient at at least two wavelengths, one of said wavelengths corresponding to an absorption peak of a bile component and another of said wavelengths having a value at which absorption is unaffected by a concentration of said bile determining whether or not there is endogastric reflux based on the measurement of the absorption of the electromagnetic radiation at said wavelengths.
Claim 3
Dependent Claim
37 words
The method of detecting enterogastric reflux as claimed in claim 1, wherein a first measurement of said step of measuring is made at a wavelength of approximately 460 nm, which corresponds to the absorption peak of bilirubin.
Claim 4
Dependent Claim
29 words
The method of detecting enterogastric reflux as claimed in claim 2, wherein a second measurement of said step of measuring is made at a wavelength of approximately 600 nm.
Claim 5
Dependent Claim
64 words
The method of detecting enterogastric reflux as claimed in claim 1, wherein electromagnetic radiation in said two wavelengths is transmitted into the stomach of a patient, wherein said radiation--after passing through a sample of gastric juice--is detected at the said two wavelength values, and wherein the intensity values found are compared to obtain a measurement of a concentration of bile in the sample examined.
Claim 6
Dependent Claim
17 words
The method of detecting enterogastric reflux as claimed in claim 1, wherein the said radiation is modulated.
Claim 7
Dependent Claim
55 words
The method of detecting enterogastric reflux as claimed in claim 1, wherein the radiation detected at each of said two wavelengths is converted into an electrical signal, said signal is amplified, filtered and rectified, and the two signals obtained are compared to obtain a signal proportional to a concentration of bile in the gastric juice.
Claim 8
Dependent Claim
28 words
The method of detection as claimed in claim 6, wherein the electrical signals corresponding to the two wavelengths are converted into digital signals and fed into a computer.
References Cited (Backward Citations)
EP0109826A2
Cited
US4567882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |