Patent EP0837320A2 successfully refreshed from Google Patents.
EP0837320A2
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System for the optical indentification of coding on a diagnostic test strip
Assignee: Bayer AG
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Filing: 1997-10-08
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Granted: —
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Expires: 2017-10-08
Abstract
Abstract Disclosed is an automated method for reading a test strip for the analysis of one or more analyte in a liquid test sample. The method involves the spectrophotometric reading of a test strip which bears at least two marker fields on its surface which are capable of reflecting light at different spectral regions from each other. The reading means of the spectrophotometer is programmed to discern information concerning the strip, such as what analyte the strip is designed to detect, from the sequences of spectral classifications by spectral reflectancy measurements of the strip's marker fields.
Inventors
- 👤 Willis E. Howard, Iii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 03:06
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N21/00; G01N21/84; G01N21/8483; G01N35/00; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06018; G01N35/00029; G01N2035/00099; G01N2035/00108; G01N35/00584; G01N35/00722; G01N35/00732; G01N2035/00742; G01N2035/00752; G06K2019/06215; G06K2019/06225; Y; Y10; Y10T; Y10T436/00; Y10T436/11; Y10T436/112499; Y10T436/115831
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
262 words
An automated method of reading a test strip for the
analysis of one or more analyte in a liquid test sample
which comprises the steps of: a) providing a test strip having at least one test
field and at least two distinct marker fields
on its surface which marker fields reflect
light at different wavelengths from each other
in a coded sequence of spectral regions which
coded sequence correlates to information concerning
the test strip; b) introducing the test strip into a strip reading
device equipped with reading means for the
fields which reading means comprises a light
source as transmitter and a light sensitive
element as receiver, which receiver is capable
of differentiating between the spectral regions
at which the marker and test fields reflect,
which strip reading device is also equipped
with means for correlating the coded spectral
region sequence of reflected light with preprogrammed
information concerning the test strip
in operative communication with the receiving
means and which reading device has means for
moving the strip and the receiving means relative
to one another, so that the reflectance of
the test field and marker fields can be individually
read by the reading means; c) allowing spectral reflectance values reflected
by the test and the marker fields to be individually
read by the reading means; and d) allowing the reading means to communicate the
sequence of spectral reflectance values reflected
from the marker fields to the correlating
means and allowing the correlating means to
correlate the sequence of reflected spectral
reflectance values with the preprogrammed information
concerning the test strip.
Claim 2
Dependent Claim
29 words
The method of Claim 1 wherein the spectral reflectance
values from the test and marker fields are read by
moving the strip and reading means relative to each
other.
Claim 3
Dependent Claim
23 words
The method of Claim 1 wherein the reading means is
capable of acquiring spatial and spectral reflectances
across the length of the strip.
Claim 4
Dependent Claim
26 words
The method of Claim 1 wherein the information concerning
the test strip is calibration information based
on the particular batch from which the strip was obtained.
Claim 5
Dependent Claim
25 words
The method of Claim 1 wherein the information concerning
the test strip relates to which analyte or analytes
the test strip is designed to analyze.
Claim 6
Dependent Claim
25 words
The method of Claim 1 wherein the information concerning
the test strip relates to location of reactive
areas, critical times, strip age and strip reactivity.
Claim 7
Dependent Claim
30 words
The method of Claim 1 in which the marker fields
comprise bars which are substantially parallel to each
other and are substantially perpendicular to the longitudinal
axis of the strip.
Claim 8
Dependent Claim
50 words
The method of Claim 2 wherein the strip reading device
has a specimen table which is movable in relation to
the reading means and wherein the strip is placed on the
specimen table and moved relative to the reading means,
so that the reading means can scan the marker fields.
Claim 9
Dependent Claim
28 words
The method of Claim 8 wherein the strip is moved
relative to the reading means a sufficient distance for
the reading means to also scan the test field.
Claim 10
Dependent Claim
112 words
A test strip for the analysis of one or more analytes
in a fluid test sample which comprises: a) a carrier of an absorbant material; b) at least one test field on the surface of the
carrier including at least one test field material
reactive with the analyte or analytes being
analyzed and capable of providing a spectrally
detectable response; c) at least two distinct marker fields on the surface
of the carrier each of which marker fields
being capable of reflecting light at different
spectral regions from each other which spectral
regions are predetermined to form a coded sequence
of spectral regions which sequence correlates
to information concerning the test
strip.
References Cited (Backward Citations)
No citation records indexed.
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