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EP0416588A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Test instrument

Assignee: Terumo Corp
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Filing: 1990-09-05
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Granted: —
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Expires: 2010-09-05
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Abstract

Abstract A test instrument for uniformly spreading a collected specimen on a reagent layer has a first opening for collecting the specimen, a specimen spreading layer having an upper surface a portion of which is exposed to the first opening, the reagent layer provided so that an upper surface thereof is in contact with the lower surface of the specimen spreading layer, and a support layer provided on a lower surface of the reagent layer. Even if the specimen does not attached itself in a uniform distribution over the large area of the first opening, it will be evenly distributed at the second opening, the opening area of which is smaller than that of the first opening at which measurement is performed. When an adsorbing layer provided in the proximity of the edge portion of the first opening is supplied with an excess amount of the specimen, a direct path to the adsorbing layer is blocked by the inner peripheral region of the first opening so that the adsorbing layer is soaked via the spreading layer. Consequently, the specimen is distributed on the reagent layer uniformly and at a fixed concentration irrespective of the amount thereof.

Inventors

  • 👤 Zensho C/O Terumo Kabushiki Kaisha Kanda
  • 👤 Katsuhiko C/O Terumo Kabushiki Kaisha Miyaguchi
  • 👤 Masufumi C/O Terumo Kabushiki Kaisha Koike
  • 👤 Tsuyoshi C/O Terumo Kabushiki Kaisha Hayakawa
  • 👤 Naoki C/O Terumo Kabushiki Kaisha Morikawa

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 07:35
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/525

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 133 words
A test instrument on which a specimen is spread for being measured by a mearusing device and having a first opening for passing said specimen, a specimen spreading layer having a portion of which is exposed to said first opening, a reagent layer in contact with said spreading layer, provided on an opposite side of said first opening, a support member in contact with said reagent layer, and provided on a opposite side of said first opening, and a second opening, at which measurement is performed by said mearusing device, situated on an opposite side of said first opening, wherein said second opening has an opening area set to be smaller than an opening area of said first opening, and a uniformly affixed portion of said specimen is exposed to said second opening.
Claim 2
Dependent Claim 133 words
A test instrument on which a specimen is spread for being measured by a mearusing device and having a first opening for passing said specimen, a specimen spreading layer having a portion of which is exposed to said first opening, a reagent layer in contact with said spreading layer, provided on an opposite side of said first opening, a support member in contact with said reagent layer, and provided on a opposite side of said first opening, and a second opening, at which measurement is performed by said mearusing device, situated on an opposite side of said first opening, wherein said second opening has an opening area set to be smaller than an opening area of said first opening, and a uniformly affixed portion of said specimen is exposed to said second opening.
Claim 3
Dependent Claim 28 words
The test instrument according to claim 1, wherein the opening area of said first opening is set to be about twice the opening area of said second opening.
Claim 4
Dependent Claim 69 words
The test instrument according to claim 1, wherein an adsorbing layer provided in close proximity to an edge portion of said first opening in order to adsorb the specimen an excess amount of which has been collected; and a covering portion, which is formed on an inner peripheral region of said first opening in a cover forming said first opening, in order to cover and conceal said adsorbing layer.
Claim 5
Dependent Claim 34 words
The test instrument according to claim 1, wherein the inner peripheral region of said first opening is formed into a circular cone-shaped configuration having an opening area which gradually diminishes toward said spreading layers
Claim 6
Dependent Claim 40 words
The test instrument according to claim 1, wherein the inner peripheral region of said first opening is formed into a circular cone-shaped configuration having an outwardly bulging curved surface and an opening area which gradually diminishes toward said spreading layer.
Claim 7
Dependent Claim 30 words
The test instrument according to claims 1 through 5, wherein the test instrument is used in a measuring device which measures blood-sugar value by measuring coloration of a reagent layer.
Claim 8
Dependent Claim 30 words
The test instrument according to claims 1 through 5, wherein the test instrument is used in an analyzing device which measures uric acid by measuring coloration of a reagent layer.
Claim 9
Dependent Claim 29 words
The test instrument according to claims 1 through 5, wherein the test instrument is used in an analyzing device which measures GOT by measuring coloratiom of a reagent layer.
Claim 10
Dependent Claim 29 words
The test instrument according to claims 1 through 5, wherein the test instrument is used in an analyzing device which measures GPT by measuring coloration of a reagent layer.
Claim 11
Dependent Claim 29 words
The test instrument according to claims 1 through 5, wherein the test instrument is used in an analyzing device which measures GOT by measuring coloration of a reagent layer.

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