Method and device for measuring a target substance in a liquid sample
First Claim
Patent Images
1. A device for measuring a target substance in a liquid sample comprising:
- a first hollow tubular member;
a liquid-impermeable plastic disk arranged on said first member, said disk having an upper surface with a reaction area having an antibody or a fragment thereof which is reactive with said target substance on the upper surface of said disk;
a second hollow tubular member, removably attachable to said first member, said second member having a liquid porous portion located above the reaction area of said first member when said second member is attached to said first member; and
a boundary member which surrounds an edge of the reaction area in order to create a space between said upper surface of said disk and said lower surface of said second member, wherein said space the liquid sample volume is restricted to comprises a predetermined volume of not more than 5 μ
l.
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Abstract
A method for measuring target substance contained in a liquid sample is disclosed. The measurement is carried out by using a device having at least one reaction area comprising a solid phase, and the liquid sample is applied onto the reaction area through a porous member to allow for a reaction of predetermined volume of the liquid sample on the reaction area. A device used for such measurement is also disclosed. A device comprises a body having at least one reaction area comprising a solid phase, and a porous member disposed on or above the reaction area. The porous member allows for the liquid sample to be permeated therethrough.
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Citations
23 Claims
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1. A device for measuring a target substance in a liquid sample comprising:
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a first hollow tubular member; a liquid-impermeable plastic disk arranged on said first member, said disk having an upper surface with a reaction area having an antibody or a fragment thereof which is reactive with said target substance on the upper surface of said disk; a second hollow tubular member, removably attachable to said first member, said second member having a liquid porous portion located above the reaction area of said first member when said second member is attached to said first member; and a boundary member which surrounds an edge of the reaction area in order to create a space between said upper surface of said disk and said lower surface of said second member, wherein said space the liquid sample volume is restricted to comprises a predetermined volume of not more than 5 μ
l. - View Dependent Claims (2)
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3. A device for measuring a target substance in a liquid sample comprising:
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a body having at least one reaction area on a substantially liquid impermeable sheet and an immobilized substance on said reaction area, which is reactive with the target substance in the liquid sample, and a porous member having at least one porous portion which is permeable to the liquid sample, said porous being disposed above said reaction area so as to contain a predetermined volume of not more than 5 μ
l of said liquid sample on said reaction area, wherein said immobilized substance is an antibody or a fragment thereof which is reactive with a tumor-associated antigen. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. A device for measuring a target substance in a liquid sample comprising:
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a body having at least one reaction area on a substantially liquid impermeable sheet; an immobilized substance on said reaction area, which is reactive with the target substance in the liquid sample; a base having a cylindrical form, said porous member being attached to the upper surface of said base; and a spacer which is attached to the upper surface of said liquid-impermeable sheet; and a porous member having at least one porous portion which is permeable to the liquid sample, said porous portion being disposed above said reaction area so as to contain a predetermined volume of not more than 5 μ
l of said liquid sample on said reaction area, wherein said immobilized substance is an antibody or a fragment thereof which is reactive with a tumor-associated antigen. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for measuring a target substance in a liquid sample by means of a device having:
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a body having at least one reaction area on a substantially liquid impermeable sheet and an immobilized substance on said reaction area, which is reactive to the target substance in the liquid sample; and a porous member having at least one porous portion which is permeable to the liquid sample, said porous being disposed above said reaction area so as to contain a predetermined volume of not more than 5 μ
l of said liquid sample on said reaction area wherein said immobilized substance comprises an antibody or fragment thereof which is reactive with a tumor-associated antigen;comprising the steps of; supplying said liquid sample through said porous portion onto said reaction area; removing the excess volume of the liquid sample by contacting a remover with the excess volume of the liquid sample on said upper surface of said porous portion; allowing said target substance to react with said immobilized substance; rinsing unbound liquid from said reaction area; removing said porous member form the device; and measuring said target substance on said reaction area. - View Dependent Claims (17, 18, 19)
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20. A method for measuring a target substance in a liquid sample by means of a device comprising:
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a body having at least one reaction area on a substantially liquid impermeable sheet; an immobilized substance on said reaction area, which is reactive with the target substance in the liquid sample; a base having a cylindrical form, said porous member being attached to the upper surface of said base; a spacer which is attached to the upper surface of said liquid-impermeable sheet; and a porous member having at least one porous portion which is permeable to the liquid sample, said porous portion being disposed above said reaction area so as to contain a predetermined volume of not more than 5 μ
l of said liquid sample on said reaction area, wherein said immobilized substance comprises an antibody or a fragment thereof which is reactive with a tumor-associated antigen;comprising the steps of; supplying said liquid sample through said porous portion onto said reaction area; removing the excess volume of the liquid sample by contacting a remover with the excess volume of the liquid sample on said upper surface of said porous portion; allowing said target substance to react with said immobilized substance; rinsing unbound liquid from said reaction area; removing said porous member from the device; and measuring said target substance on said reaction area. - View Dependent Claims (21, 22, 23)
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Specification