EP0451981A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Disposable reagent unit
Assignee: Cascade Medical Inc
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Filing: 1991-03-22
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Granted: —
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Expires: 2011-03-22
Abstract
Abstract A disposable reagent unit including a base strip (12) with a plurality of spaced holes (14,16), a double face tape (32), a reagent (36) and a lot identification paper (34) in a side-by-side adjacent relationship, a wick (30), and a cover strip (26) with a hole (20) for engagement with a diagnostic instrument quantitative of an analyte in a liquid such as glucose in blood. Blood is deposited in the blood bowl (28) and is wicked to the reagent (36) for subsequent color change other detectable change to be measured by a diagnostic instrument. The color intensify of the reagent is proportional to the analyte such as glucose in the blood.
Inventors
- 👤 Paul J. Anderson
- 👤 Thomas C. Carlson
- 👤 Ross A. Jessen
- 👤 Dennis D. Matuska
- 👤 Richard E. Jones
- 👤 Bert Walter
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 16:59
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/525; A; A61; A61B; A61B5/00; A61B5/145; A61B5/14532; C; C12; C12Q; C12Q1/00; C12Q1/54; A61B2562/00; A61B2562/02; A61B2562/0295; A61B5/1455
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
111 words
A test device characterised in that it comprises: a housing comprising first and second sheets (26, 12) secured together in a superimposed disposition; said first sheet (26) having a port (28) therein to receive a liquid test sample containing an analyte to be tested; a reagent (36) disposed between the first and second sheets and selected to produce a desired response to the analyte; a conduit (30) to permit the liquid to pass from the port (28) to the reagent (36); and said second sheet (12) having a window or other display means (20) through which or by which said response can be observed or otherwise detected either qualitatively or quantitatively.
Claim 2
Dependent Claim
20 words
A test device according to Claim 1, wherein said desired response is a change of color or other visible signal.
Claim 3
Dependent Claim
20 words
A test device according to Claim 1 or 2, wherein the liquid sample comprises blood and the analyte is glucose.
Claim 4
Dependent Claim
31 words
A test device according to Claim 1, 2 or 3, wherein said second sheet (12) has a second window or other display means (18) to effect a calibration of the device.
Claim 5
Dependent Claim
121 words
A disposable diagnostic reagent unit for operative engagement with a medical monitoring diagnostic system, said disposable unit comprising: a. a housing (12, 26); b. means (14, 16) for operatively connecting said housing to said system; c. blood reagent chemistry means (36) supported within said housing; d. liquid-conveying means (30) including a first opening (28) in said housing for conveying a liquid substance to said reagent means; and e. aperture means (18) through said housing adjacent the system positioned to pass reflected light from at least a portion of said reagent means in said diagnostic unit to a sensing means in the system for a determination of change of said reagent means by the system whereby said change indicates a diagnostic condition.
Claim 6
Dependent Claim
138 words
A diagnostic reagent unit for operative engagement with a monitoring diagnostic system, said disposable unit comprising: a housing (12, 26) ; means (14, 16) for operatively connecting said housing to said system; blood reagent chemistry means (36) supported within said housing; liquid conveying means (30) including a first opening (28) in said housing for conveying a liquid substance to said reagent means; and aperture means (18) in the housing, the nature and disposition of the aperture with respect to the housing being such that, when the reagent unit is in said operative engagement with the monitoring system, the aperture can pass reflected light from at least a portion of said reagent means to a sensing means in the system for a determination of change of said reagent means by the system whereby said change indicates a diagnostic condition.
Claim 7
Dependent Claim
153 words
A disposable diagnostic reagent unit for operating in engagement and use with a medical diagnostic system of a type having a puncturing means, connection means for operatively receiving said unit on said system and means in said system for reading a detectable change on the reagent means, said disposable diagnostic reagent unit comprising: a. a housing; b. means on said housing for operatively connecting said housing to said system; c. reagent means including a front side facing said system and a back side away from said system, supported within said housing; d. liquid conveying means including a first opening in said housing for conveying a liquid substance from the punctured surface to said reagent means; and, e. aperture means through said housing at a point adjacent said system unit for conveying light from a back side portion of said reagent means to said system for determination of change thereby indicating a diagnostic condition.
Claim 8
Dependent Claim
20 words
A disposable diagnostic reagent unit according to Claim 7, wherein said surface is skin and said liquid substance is blood.
Claim 9
Dependent Claim
33 words
A disposable diagnostic reagent unit according to Claim 7 or 8, wherein the color change of said reagent is caused by glucose in said liquid substance and said diagnostic condition is glucose level.
Claim 10
Dependent Claim
146 words
A disposable diagnostic reagent unit for operating in engagement and use with a medical diagnostic system of a type having actuation means for driving of a puncturing means, connection means for operatively receiving said disposable reagent unit on said system and means in said system for reading a color change on the reagent means, said disposable diagnostic reagent unit comprising: a. a housing including opposing finger gripping tabs and a bottom plate; b. at least one reagent means having a variable color responsive to the concentration of an analyte in a liquid supported within said housing; c. liquid conveying means including said first opening in said housing for conveying said liquid from said punctured surface to said reagent means; and, d. aperture means through said housing for providing access for reading said reagent means for change of color by said system thereby indicating a diagnostic condition.
Claim 11
Dependent Claim
18 words
A reagent unit according to any of Claims 5 to 10, wherein said liquid-conveying means comprises a wick.
Claim 12
Dependent Claim
20 words
A reagent unit according to any of Claims 5 to 10, wherein said liquid-conveying means comprises a capillary air gap.
Claim 13
Dependent Claim
28 words
A reagent unit according to any of Claims 5 to 12, wherein said liquid-conveying means includes a filter for filtering at least one component from said liquid substance.
Claim 14
Dependent Claim
19 words
A reagent unit according to any of Claims 5 to 13, wherein the housing has a lot-to-lot calibration means.
References Cited (Backward Citations)
No citation records indexed.
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